Cement-based composite coiled material for emergency rescue and rapid construction method

Abstract

The application relates to the technical field of civil engineering materials, and particularly relates to a cement-based composite coiled material for emergency rescue and a rapid construction method. The cement-based composite coiled material for emergency rescue comprises a three-dimensional structure fabric and a hydraulic cement-based filler, the hydraulic cement-based filler is filled in the three-dimensional structure fabric, and the three-dimensional structure fabric further comprises a waterproof wear-resistant coating on one side of the bottom; the hydraulic cement-based filler is prepared from the following components in parts by weight: high belite sulphoaluminate cement 30-45 parts, ordinary portland cement 10-20 parts, fly ash 10-15 parts, alpha-hemihydrate gypsum 5-8 parts, expanding agent 3-5 parts, polycarboxylate superplasticizer 0.5-1.5 parts, silica sand 25-35 parts, and setting regulator 0.1-0.8 parts. The cement-based composite coiled material for emergency rescue prepared by the application has good tensile property, and the prepared cement-based composite coiled material meets the performance index requirements of 1-day compressive strength > 50MPa, 28-day compressive strength > 65MPa, 1-day tensile strength > 3.5MPa, and 28-day tensile strength > 5.5MPa.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of civil engineering materials, and particularly relates to a cement-based composite coiled material for emergency rescue and a rapid construction method, which is suitable for emergency repair scenes requiring rapid solidification, high strength and waterproof wear resistance. BACKGROUND

[0002] Cement-based composite materials are recognized as effective repair materials, and their early strength and construction efficiency directly affect the rescue effect. Traditional ordinary Portland cement has slow early strength development, which is difficult to meet the demand of "rapid solidification and immediate load bearing" in emergency repair in cold regions. Conventional sulphoaluminate cement is made of raw materials with appropriate components, calcined cement clinker with anhydrous calcium sulphoaluminate and dicalcium silicate as main mineral components, and limestone and appropriate gypsum ground together. It is a hydraulic cementitious material with high early strength. Sulphoaluminate cement has the advantages of low carbon dioxide emission, short setting time, good frost resistance, high hydration heat and fast early strength development, and is mainly used in winter engineering, emergency repair and construction, marine engineering, road and bridge engineering, and concrete and cement products, but the long-term strength stability and crack resistance need to be improved.

[0003] High belite sulphoaluminate cement has high early strength and excellent durability, and its main mineral components are belite (β-C2S) and anhydrous calcium sulphoaluminate (C4A3S), with fast hydration reaction and continuous growth of late strength. Ordinary Portland cement can improve the long-term stability of the system, and the compounding of high belite sulphoaluminate cement can balance the early strength and durability. However, the existing cement materials for rescue still have problems such as unreasonable component design, fuzzy three-dimensional reinforcing structure parameters, and insufficient early strength within 1 hour, which are difficult to meet the rapid construction demand in extreme environment. In addition, the construction steps of the existing cement materials for rescue and disaster relief are complicated, and the bending and compressive properties and waterproofness need to be further improved.

[0004] Patent CN104211358 B discloses a fast-hardening and early-strength cement-based composite material, which comprises cement, mineral admixture, fine aggregate, water, polycarboxylic acid high-performance water reducing agent, lithium carbonate early strength agent, sodium gluconate retarder, polyacrylic acid thickening agent and polypropylene fiber. The cement is sulphoaluminate cement, the mineral admixture is fly ash, and the fine aggregate is quartz stone powder. The material uses traditional sulphoaluminate cement as the base material, and the 1-day compressive strength is less than 40 MPa, and the strength within 1 hour is low, which cannot meet the demand of "immediate load bearing" in emergency repair.

[0005] The structural parameters of the existing cement-based composite roll containing fabric reinforcement are not quantified, and the fabric is mostly a simple layered structure. For example, patent CN110145075B discloses a wet-laid polymer cement high polymer roll and a preparation method and construction method thereof. The high polymer roll comprises a top layer, a polymer cement high polymer layer and a bottom layer. The polymer cement high polymer layer is sandwiched between the top layer and the bottom layer and bonds the top layer and the bottom layer together. The fabric is a simple layered structure, which results in insufficient tensile strength and cannot resist impact and shear force in rescue scenes. In the construction process, an adhesive needs to be prepared first and then applied to the surface of the base surface to be paved. After the wet-laid polymer cement high polymer roll is laid on the base surface, it is compacted. The construction process is complex, the construction time and maintenance time per square meter are long, the construction efficiency is low, and the fabric is not modified, resulting in poor wear resistance and poor waterproof performance of the fabric.

[0006] Therefore, in view of the above problems, it is urgent to develop a cement-based composite roll for emergency rescue with 1-hour strength reaching the standard, excellent comprehensive performance and efficient construction through cement matrix ratio, three-dimensional fabric design and construction process innovation, which is of great significance to improve the efficiency of emergency rescue. SUMMARY

[0007] The purpose of the present application is to provide a cement-based composite roll for emergency rescue and a rapid construction method to solve the problems of insufficient early strength, insufficient three-dimensional structure performance and low construction efficiency of existing rescue materials.

[0008] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0009] The technical scheme provided by the present application is as follows:

[0010] In the first aspect, the present application provides a cement-based composite roll for emergency rescue. The cement-based composite roll for emergency rescue comprises a three-dimensional fabric and a hydraulic cement-based filler. The hydraulic cement-based filler is filled in the three-dimensional fabric. The bottom side of the three-dimensional fabric further comprises a waterproof and wear-resistant coating.

[0011] Preferably, the hydraulic cement-based filler is prepared by components including the following weight parts: high belite sulphoaluminate cement 30-45 parts, ordinary portland cement 10-20 parts, fly ash 10-15 parts, alpha-hemihydrate gypsum 5-8 parts, expanding agent 3-5 parts, polycarboxylic acid water reducer 0.5-1.5 parts, silica sand 25-35 parts, and setting regulator 0.1-0.8 parts.

[0012] Through the above technical scheme, the high-belite sulphoaluminate cement has fast early hydration, and the hour strength contribution is remarkable; the ordinary portland cement supplements tricalcium silicate (C3S) and dicalcium silicate (C2S), and improves long-term strength stability; the alpha-hemihydrate gypsum adjusts setting time, promotes ettringite generation, and improves early strength; the expansive agent compensates for hydration shrinkage, and avoids early cracking; and the silica sand plays a role of enhancing aggregate skeleton.

[0013] Preferably, the setting regulator comprises at least one of lithium carbonate, lithium sulfate, lithium nitrate, sodium sulfate, sodium bisulfate.

[0014] Preferably, the high-belite sulphoaluminate cement has a strength grade of ≥72.5, and comprises the following chemical components in percentage by weight: SiO2 8.2-10.2%, Al2O3 28.4-31.9%, CaO 42.2-45.7%, Fe2O3 2.7-3.2%, K2O 0.04-0.06% MgO 2.1-2.5%, Na2O 0.2-0.3%, SO3 6.2-14.2%.

[0015] Preferably, the fly ash is selected from F-class I-grade fly ash with a strength activity index of ≥80%, and comprises the following chemical components in percentage by weight: SiO2 56.2-60.5%, Al2O3 20.6-22.8%, CaO 2.7-4.2%, Fe2O3 3.9-4.7%, K2O 0.9-1.3%, MgO 1.1-1.5%, Na2O 0.7-1.1%, SO3 0.1-0.2%.

[0016] Through the above technical scheme, the fly ash plays a role of volcanic ash effect, and refines pore structure.

[0017] Preferably, the silica sand has a SiO2 content of ≥95%, and a particle size range of 40-120 mesh, wherein the proportion of 40-80 mesh particles is 60-70%, and the proportion of 80-120 mesh particles is 30-40%.

[0018] Preferably, the expansive agent is one of calcium oxide type expansive agent and calcium sulphoaluminate-calcium oxide type expansive agent, has a CaO content of ≥12%, a specific surface area of ≥350 m 2 / kg, a compressive strength ratio of ≥90%, and a 7d limited expansion rate in water of ≥0.035%.

[0019] Preferably, the polycarboxylic acid water reducing agent is a powder with a water reducing rate of ≥25%, and an early strength type polycarboxylic acid high performance water reducing agent.

[0020] Preferably, the three-dimensional structure fabric is composed of an upper surface layer, a middle core layer, a lower surface layer, and a waterproof and wear-resistant coating on one side of the bottom of the lower surface layer, the overall thickness of the three-dimensional structure fabric is 10-15 mm; the thickness of the upper surface layer is 0.5-1 mm, the height of the middle core layer is 8-12 mm, and the thickness of the lower surface layer is 0.5-1 mm; the upper surface layer and the lower surface layer are connected by the core yarn of the middle core layer, wherein the core yarn is arranged in a "double X" type cross staggered arrangement in the warp direction, the cross angle is 60°-90°, and is arranged in an inclined I shape in the weft direction, the inclination angle is 30°-45°; the upper surface layer and the lower surface layer are both plain fabric structures, and the hole types of the upper surface layer and the lower surface layer are both square; the warp and weft density of the upper surface layer is 4-8 roots / cm, and the hole side length of the upper surface layer is 1-2 mm; the warp and weft density of the lower surface layer is 10-20 roots / cm, and the hole side length of the lower surface layer is 0.2-0.8 mm.

[0021] Preferably, the warp and weft of the upper surface layer and the lower surface layer of the three-dimensional structure fabric and the core yarn are all PET flat filaments; the thickness of the PET flat filament is 60-80 μm, and the width is 2-4 mm.

[0022] Preferably, the preparation method of the PET flat filament comprises the following steps:

[0023] After the PET plastic particles are dried at 150-160℃ under vacuum, a melt is obtained by melt extrusion through a screw extruder, the screw temperature is 250-270℃, the melt is cooled by a 55-60℃ quenching roller to obtain a cast sheet, the cast sheet is cut by a cutter to obtain a PET embryonic filament, the embryonic filament is pulled into a longitudinal stretching machine by a guide roller, preheated at 85-95℃, and then subjected to one-way two-stage stretching, the temperature of the two-stage stretching is 100-110℃, the total stretching ratio is 7 times, then heat setting is performed at 170-190℃, and finally the PET flat filament is obtained by winding.

[0024] Preferably, the preparation method of the waterproof and wear-resistant coating on one side of the bottom of the three-dimensional structure fabric comprises the following steps:

[0025] P1: polytetrahydrofuran diol, isophorone diisocyanate and dibutyl tin dilaurate are mixed and stirred, then 1,4-butanediol and 2,2-dimethylol propionic acid are added, reacted, then triethanolamine is added and reacted again, modified aramid nanofiber is added to continue the reaction, cooled, hydroxyethyl methacrylate is added and reacted, then triethylamine is added for neutralization, finally water is added, high-speed stirring is performed, 2-hydroxy-2-methyl propiophenone is added, and continuous stirring treatment is performed to obtain a reinforced polyurethane;

[0026] In the above process, the modified aramid nanofiber reacts with the isocyanate group, and the remaining isocyanate group is capped with hydroxyethyl methacrylate.

[0027] P2: The bottom of the three-dimensional fabric is subjected to plasma bombardment, and then the surface is coated with a 3-mercaptopropyl trimethoxysilane ethanol aqueous solution. After drying, the bottom side of the lower surface layer of the three-dimensional fabric is coated with a waterproof and wear-resistant coating by continuing to coat the enhanced polyurethane, irradiating with ultraviolet light, and then curing.

[0028] In the above process, the surface of the three-dimensional fabric is increased after plasma bombardment Carboxyl and hydroxyl groups condense with —Si(OH)3 of 3-mercaptopropyl trimethoxysilane solution, and then the thiol groups are bonded by reacting with the double bonds in the polyurethane under ultraviolet light irradiation; the adhesion of the coating to the three-dimensional fabric is enhanced by chemical bonding, and the performance of the cement-based composite roll material is improved.

[0029] Preferably, in P1, the amount of polytetrahydrofuran diol, isophorone diisocyanate, dibutyl tin dilaurate, 1,4-butanediol, 2,2-dimethylol propionic acid, triethanolamine, modified aramid nanofiber, hydroxyethyl methacrylate, triethylamine, water, 2-hydroxy-2-methylpropiophenone is 40-80g: 35-70g: 5-10μL: 2-4g: 4.7-9.4g: 1.2-2.4g: 0.2-0.4g: 20-40g: 3.5-7g: 400-800g: 2-4g.

[0030] Preferably, in step P1, the stirring treatment conditions are: stirring treatment temperature 75-85℃, stirring treatment time 0.5-1.5h, stirring treatment speed 300-420rpm; reaction time 1.5-2.5h; further reaction time 40-80min; continue reaction conditions: continue reaction temperature 65-75℃, continue reaction time 0.5-1.5h; cooling temperature 55-65℃; hydroxyethyl methacrylate reaction time 3.5-4.5h; neutralization reaction conditions: neutralization reaction temperature 35-45℃, neutralization reaction time 25-35min; high-speed stirring conditions: high-speed stirring time 25-35min, high-speed stirring speed 3000-4000rpm; continue stirring treatment time 2-4h.

[0031] Preferably, in P2, the plasma bombardment conditions are: bombardment current 50-60mA, bombardment time 10-15min; the volume ratio of ethanol and water in the ethanol aqueous solution is 9:1; the mass fraction of 3-mercaptopropyl trimethoxysilane ethanol aqueous solution is 2.5-3.5wt%; the ultraviolet light irradiation method is: irradiation under 365nm ultraviolet light for 8-12min; the curing method is: curing temperature 75-85℃, curing time 10-14h; the amount of enhanced polyurethane coating is 30-50g / m 2 .

[0032] Preferably, the preparation method of the modified aramid nanofiber comprises the following steps:

[0033] S1: mixing aramid nanofiber, γ-glycidoxypropyltrimethoxysilane and water, stirring, reacting, washing, and obtaining treated aramid nanofiber;

[0034] In the above process, the slightly deprotonated aramid nanofiber activated by nanofiber promotes the ring-opening reaction of γ-glycidoxypropyltrimethoxysilane and the amino group of aramid nanofiber, and is grafted to the surface of aramid nanofiber.

[0035] S2: adding 3-mercaptopropyltrimethoxysilane to the ethanol solution of the treated aramid nanofiber obtained in S1, stirring, reacting, and washing to obtain mercapto- aramid nanofiber;

[0036] In the above process, the silicon hydroxyl of 3-mercaptopropyltrimethoxysilane hydrolysis condenses with the silicon hydroxyl on the surface of the treated aramid nanofiber, so that the aramid nanofiber surface has mercapto group.

[0037] S3: mixing sorbitan oleate and mercapto- aramid nanofiber, ultrasonic treatment, and adding 2-hydroxy-2-methylpropiophenone to obtain modified aramid nanofiber.

[0038] In the above process, the mercapto group on the surface of the mercapto- aramid nanofiber reacts and grafts with the carbon-carbon double bond of sorbitan oleate under the action of ultraviolet light.

[0039] Preferably, in S1, the amount ratio of aramid nanofiber, γ-glycidoxypropyltrimethoxysilane and water is 20-40g:2-4mL:78-150mL; the stirring treatment time is 5-15min; the reaction conditions are that the reaction temperature is 75-85℃ and the reaction time is 5-7h; and the washing method is washing with ethanol solution and deionized water for 3-5 times respectively.

[0040] Preferably, in S2, the amount ratio of 3-mercaptopropyltrimethoxysilane and ethanol solution is 1-2g:79-160mL; the stirring treatment time is 5-15min; the reaction conditions are that the reaction temperature is 55-65℃ and the reaction time is 6-10h; and the washing method is washing with ethanol and deionized water for 3-5 times respectively.

[0041] Preferably, in S3, the amount ratio of sorbitan oleate, mercapto- aramid nanofiber and 2-hydroxy-2-methylpropiophenone is 4.3-9.6g:6.9-14g:0.05-0.1g; the ultrasonic treatment conditions are that the ultrasonic treatment time is 3-5h and the ultrasonic treatment frequency is 20-30kHz; and the ultraviolet light irradiation conditions are irradiating with 365nm ultraviolet light for 30-60min.

[0042] Preferably, the preparation method of the cement-based composite coiled material for emergency rescue comprises the following steps:

[0043] R1: 30-45 parts of high belite sulphoaluminate cement, 10-20 parts of ordinary portland cement, 10-15 parts of fly ash, 5-8 parts of alpha-hemihydrate gypsum, 3-5 parts of expanding agent, 0.5-1.5 parts of polycarboxylic acid water reducer, 25-35 parts of silica sand, and 0.1-0.8 parts of coagulation regulator are weighed in proportion and ground together to a specific surface area of 400-500 m 2 / kg to obtain a hydraulic cement-based filler;

[0044] R2: insert the powder filling pipe into the three-dimensional fabric, fill the hydraulic cement-based filler into the three-dimensional fabric, and vibrate to assist the filling to obtain the cement-based composite coiled material for emergency rescue.

[0045] Preferably, the filling amount of the hydraulic cement-based filler is 2.5-3.5 kg / m 2 .

[0046] The rapid construction method of the cement-based composite coiled material for emergency rescue comprises the following construction steps:

[0047] The cement-based composite coiled material for emergency rescue is hoisted and transported by a robot, continuously laid on the construction base surface, and shot with nails at intervals of 20-30 cm during laying, and water is sprayed and maintained to complete the rapid construction.

[0048] Preferably, the water spraying and maintenance method is as follows: spray water twice to activate the hydration of the cement-based material, first spray water for 2-4 min under the conditions of water temperature of 20-30℃, water spraying rate of 2-4 L / (min·m 2 ), and water spraying distance of 30-50 cm to activate the hydration of the cement, and then spray water for 1-3 min at a water spraying rate of 2-4 L / (min·m 2 ) and a water spraying distance of 30-50 cm after 4-6 min; and the curing temperature is 0-50℃.

[0049] As described above, due to the adoption of the above technical solutions, the present application has the following beneficial effects:

[0050] 1.The cement-based composite coiled material prepared by the present application for emergency rescue, which is composed of high belite sulphoaluminate cement, ordinary portland cement, fly ash, hemihydrate gypsum, polycarboxylate superplasticizer, silica sand and setting time regulator, and has a three-dimensional fabric structure with water permeability, erosion resistance on the surface, abrasion resistance, puncture resistance and waterproofness on the bottom, and good mechanical properties and tensile properties, meeting the performance index requirements of 1-day compressive strength > 50 MPa, 28-day compressive strength > 65 MPa, 1-day tensile strength > 3.5 MPa and 28-day tensile strength > 5.5 MPa. The high belite sulphoaluminate cement (grade 72.5) and the ordinary portland cement (grade 42.5) are compounded to provide early strength by the rapid hydration of C4A3S mineral of the former and long-term growth by the slow hydration of C3S / C2S of the latter; the composite setting time regulator containing lithium carbonate is introduced to accelerate the dissolution of aluminate phase by Li⁺, so that the 1-hour strength breaks through 20 MPa; the graded quartz sand (40-120 mesh) reduces the porosity to < 8%, and the expansion agent compensates for shrinkage (expansion rate 0.02-0.05%).

[0051] 2.The three-dimensional fabric is designed by finite element optimization in the present application, which is composed of an upper surface layer, a middle core layer, a lower surface layer and a waterproof and abrasion-resistant coating on one side of the bottom of the lower surface layer, and the overall thickness of the three-dimensional fabric is 10-15 mm; the upper surface layer and the lower surface layer are both plain fabric structures, and the hole types of the upper surface layer and the lower surface layer are both square, the hole side length of the upper surface layer is 1-2 mm, and the hole side length of the lower surface layer is 0.2-0.8 mm, ensuring uniform filling of the filler; the upper surface layer and the lower surface layer are connected by the core yarn of the middle core layer, wherein the core yarn is arranged in a "double X" type crosswise staggered arrangement in the warp direction with a cross angle of 60-90°, and arranged in an inclined I shape in the weft direction with an inclination angle of 30-45°, forming a space truss structure, which can increase the interfacial bonding strength by 40% and the tensile strength to more than 350 N / 50 mm.

[0052] 3. The waterproof and wear-resistant coating on one side of the bottom of the lower surface layer of the three-dimensional fabric prepared by the application has good wear resistance, waterproofness and puncture resistance; the amine groups and hydroxyl groups on the surface of the modified aramid nanofiber can react with the terminal isocyanate groups of the polyurethane, and the synergistic effect of hydrogen bonding and covalent bonding provides strong interfacial interaction, so that the interfacial interaction between the filler and the matrix is enhanced; a network shell of silanol and mercapto is formed in situ on the surface of the aramid nanofiber by means of gamma-glycidoxypropyltrimethoxysilane and 3-mercaptopropyltrimethoxysilane, and then sorbitan oleate is grafted, the long chain structure of sorbitan oleate produces a plasticizing effect to improve the chain segment movement ability of the polyurethane and improve the flexibility, the hydroxyl groups of sorbitan oleate can also react with the -NCO at the end of the polyurethane chain to form multiple crosslinking points, and at the same time, the chains of sorbitan oleate migrate to the surface during the friction process to form a lubricating transfer film and improve the puncture resistance; the modified aramid nanofiber makes the surface more dense through the synergistic effect of the components, the long fiber structure becomes thicker, the roughness increases, and the modified aramid nanofiber is uniformly dispersed in the polyurethane matrix, the modified aramid nanofiber has excellent mechanical strength and wear resistance, and the intrinsic high strength characteristics of the modified aramid nanofiber synchronously improve the wear resistance, toughness, tensile strength and elongation at break of the coating through bridging and entanglement effect; the interfacial bonding force between the modified aramid nanofiber and the polyurethane matrix is significantly improved, so that effective stress transfer is realized and crack propagation is inhibited.

[0053] 4. According to the hydration kinetics characteristics of the double cement system (sulfoaluminate cement induction period 0-30 min, ordinary portland cement acceleration period 30-60 min), two water spraying curing are designed: the first one activates the ettringite generation, and the second one supplements the water demand of C3S hydration to make the hydration degree increase by 25%, and the construction time per square meter is less than 10 min; and the cement-based composite coil prepared by the application is hoisted, transported, laid and anchored by a robot, and is formed by a segmented water spraying curing process, which can greatly improve the efficiency of rescue construction. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0055] Figure 1 is a physical map of the three-dimensional fabric of the present application;

[0056] Figure 2 is a physical map of the three-dimensional fabric of the present application;

[0057] Figure 3is a schematic diagram of the warp and weft structure of the stereoscopic three-dimensional fabric core yarn of the present application;

[0058] Figure 4 is a column chart of the flexural strength of the hydraulic cement-based filling material of the present application;

[0059] Figure 5 is a column chart of the compressive strength of the hydraulic cement-based filling material of the present application;

[0060] Figure 6 is a performance schematic diagram of the performance of the cement-based composite coiled material for emergency rescue of the present application. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0062] Unless otherwise specified, the reagents and raw materials used in the embodiments and comparative examples of the present application are all conventional commercially available.

[0063] Some of the substances involved in the following examples and comparative examples and sources are shown in Table 1:

[0064] Table 1

[0065]

[0066] Example 1

[0067] The present embodiment discloses a preparation method of PET flat yarn, comprising the following steps:

[0068] After the PET plastic particles are dried at 155℃ under vacuum, a melt is obtained by melt extrusion through a screw extruder, the screw temperature is 260℃, the melt is cooled through a 57℃ quenching roller to obtain a cast sheet, the cast sheet is cut by a cutter to obtain a PET embryonic yarn, the embryonic yarn is pulled into a longitudinal stretching machine through a guide roller, after preheating at 90℃, one-way two-stage stretching is carried out, the stretching temperature is 105℃, the total stretching ratio is 7 times, then heat setting is carried out at 180℃, and finally the PET flat yarn is obtained by winding.

[0069] Example 2

[0070] The present embodiment discloses a preparation method of modified aramid nanofiber, comprising the following steps:

[0071] S1: 30 g aramid nanofiber, 2 mL γ-glycidoxypropyltrimethoxysilane and 115 mL water were mixed, stirred and treated for 10 min, reacted at 80°C for 6 h, washed with ethanol solution and deionized water for 4 times respectively, to obtain treated aramid nanofiber;

[0072] S2: The treated aramid nanofiber obtained in S1, 1.5 g 3-mercaptopropyltrimethoxysilane was added to 120 mL ethanol solution, stirred and treated for 10 min, reacted at 60°C for 8 h, and finally washed with ethanol and deionized water for 4 times respectively, to obtain mercapto aramid nanofiber;

[0073] S3: 7.2 g sorbitan oleate, 10.5 g mercapto aramid nanofiber were mixed, ultrasonic treated at a frequency of 25 kHz for 4 h, 0.075 g 2-hydroxy-2-methylpropiophenone was added and mixed, and irradiated with 365 nm ultraviolet light for 45 min, to obtain modified aramid nanofiber.

[0074] Example 3

[0075] The present embodiment discloses a preparation method of a waterproof and wear-resistant coating on one side of the bottom of a three-dimensional fabric, comprising the following steps:

[0076] P1: 60 g polytetrahydrofuran diol, 53 g isophorone diisocyanate and 7.5 μL dibutyltin dilaurate were mixed, stirred and treated at 80°C at a stirring speed of 360 rpm for 1 h, then 3 g 1,4-butanediol and 7.1 g 2,2-dimethylol propionic acid were added and reacted for 2 h, 1.8 g triethanolamine was further added and reacted for 60 min, then 0.3 g modified aramid nanofiber prepared in Example 2 was added at 70°C, continued to react for 1 h, then cooled to 60°C, 30 g hydroxyethyl methacrylate was added, reacted for 4 h, then cooled to 40°C, 5.3 g triethylamine was added and neutralized for 30 min, finally 600 g water was added, stirred at a high speed of 3500 rpm for 30 min, then 3 g 2-hydroxy-2-methylpropiophenone was added, continued to stir and treat for 3 h, to obtain enhanced polyurethane;

[0077] P2: The bottom of the three-dimensional fabric was plasma bombarded at a current of 55 mA for 12 min, then coated with 3 wt% 3-mercaptopropyltrimethoxysilane ethanol aqueous solution, dried, then coated with enhanced polyurethane, irradiated with 365 nm ultraviolet light for 10 min, then cured at 80°C for 12 h, to obtain a waterproof and wear-resistant coating on one side of the bottom of the lower surface layer of the three-dimensional fabric.

[0078] The three-dimensional structure fabric is composed of an upper surface layer, a middle core layer, a lower surface layer and a waterproof and wear-resistant coating on one side of the bottom of the lower surface layer; the height of the middle core layer is 10 mm; the upper surface layer and the lower surface layer are connected by core yarns of the middle core layer, wherein the core yarns are arranged in a staggered cross-shaped pattern in the warp direction with an intersection angle of 70° and arranged in an inclined I-shaped pattern in the weft direction with an inclination angle of 30°; the upper surface layer and the lower surface layer are both plain weave structures, and the hole types of the upper surface layer and the lower surface layer are both square; the warp and weft densities of the upper surface layer are 6 roots / cm, and the hole side length of the upper surface layer is 1.5 mm; the warp and weft densities of the lower surface layer are 15 roots / cm, and the hole side length of the lower surface layer is 0.5 mm; the warp yarns and weft yarns of the upper surface layer and the lower surface layer of the three-dimensional structure fabric and the core yarns are all PET flat filaments; the width of the upper surface layer PET flat filament is 4 m, and the thickness is 80 μm; the width of the lower surface layer PET flat filament is 2 m, and the thickness is 60 μm.

[0079] Example 4

[0080] The embodiment discloses a preparation method of a cement-based composite roll for emergency rescue, and comprises the following steps:

[0081] Step (1) 38 parts of high belite sulphoaluminate cement, 15 parts of ordinary portland cement, 12 parts of fly ash, 6 parts of alpha-hemihydrate gypsum, 4 parts of calcium oxide expander, 1 part of polycarboxylic acid water reducer, 30 parts of silica sand and 0.4 parts of lithium carbonate are ground together to a specific surface area of 460 m 2 / kg to obtain a hydraulic cement-based filler;

[0082] Step (2) a powder filling pipe is inserted into the three-dimensional structure fabric with a waterproof and wear-resistant coating on one side of the bottom of the lower surface layer prepared in Example 3, the hydraulic cement-based filler is filled into the three-dimensional structure fabric, and vibration is used to assist the filling to obtain the cement-based composite roll for emergency rescue.

[0083] The filling amount of the hydraulic cement-based filler is 3 kg / m 2 .

[0084] The rapid construction method of the cement-based composite roll for emergency rescue obtained in Example 4 is as follows: the cement-based composite roll for emergency rescue is hoisted and transported by a robot, continuously laid on a base surface, shot with nails for anchoring and compacted at intervals of 25 cm during laying, sprayed with water, and cured at 25 DEG C to complete the rapid construction.

[0085] The spraying and curing method is as follows: the water in the cement-based material is activated by spraying water twice, first spraying water for 3 min under the conditions of a water temperature of 25 DEG C, a spraying rate of 3 L / (min.m 2 ), and a spraying distance of 40 cm to activate the cement hydration, and then spraying water for 2 min at a spraying rate of 3 L / (min.m 2 ) and a spraying distance of 40 cm after 5 min.

[0086] Example 5

[0087] The embodiment discloses a preparation method of a cement-based composite coiled material for emergency rescue, and comprises the following steps:

[0088] Step (1) grind 45 parts of high belite sulphoaluminate cement, 10 parts of ordinary portland cement, 15 parts of fly ash, 5 parts of alpha-hemihydrate gypsum, 5 parts of calcium sulphoaluminate-calcium oxide expansive agent, 1.5 parts of polycarboxylic acid water reducer, 25 parts of silica sand and 0.8 parts of lithium sulfate together to a specific surface area of 400 m 2 / kg, to obtain a hydraulic cement-based filler;

[0089] Step (2) insert a powder filling pipe into the three-dimensional structure fabric prepared in Example 3 and having a waterproof wear-resistant coating on the bottom side of the lower layer, and fill the hydraulic cement-based filler into the three-dimensional structure fabric, and vibration-assisted filling is performed, to obtain a cement-based composite coiled material for emergency rescue.

[0090] The filling amount of the hydraulic cement-based filler is 3.5 kg / m 2 .

[0091] The rapid construction method of the cement-based composite coiled material for emergency rescue obtained in Example 5 is as follows: the cement-based composite coiled material for emergency rescue is hoisted and transported by using a robot, is continuously laid on a base surface, is shot and anchored at intervals of 30 cm and is compacted while laying, water is sprayed, and curing is performed at 0 DEG C, to complete rapid construction.

[0092] The water spraying and curing method is as follows: water is sprayed twice to activate cement hydration, first, water is sprayed for 2 min under the conditions of a water temperature of 20 DEG C, a water spraying rate of 4 L / (min.m 2 ), and a water spraying distance of 50 cm, to activate cement hydration, and then water is sprayed for 2 min at a water spraying rate of 2 L / (min.m 2 ) and a water spraying distance of 50 cm after 6 min.

[0093] Example 6

[0094] The embodiment discloses a preparation method of a cement-based composite coiled material for emergency rescue, and comprises the following steps:

[0095] Step (1) grind 30 parts of high belite sulphoaluminate cement, 20 parts of ordinary portland cement, 10 parts of fly ash, 8 parts of alpha-hemihydrate gypsum, 3 parts of calcium oxide expansive agent, 0.5 parts of polycarboxylic acid water reducer, 35 parts of silica sand and 0.1 parts of lithium nitrate together to a specific surface area of 500 m 2 / kg, to obtain a hydraulic cement-based filler;

[0096] Step (2) inserts the powder filling pipe into the three-dimensional fabric prepared in Example 3, fills the hydraulic cement-based filler into the three-dimensional fabric, and vibrates to assist filling, to obtain the cement-based composite coiled material for emergency rescue.

[0097] The filling amount of the hydraulic cement-based filler is 2.5 kg / m 2 .

[0098] The rapid construction method of the cement-based composite coiled material for emergency rescue obtained in Example 6 is as follows: the cement-based composite coiled material for emergency rescue is hoisted and transported by a robot, continuously laid on a base surface, anchored and compacted by shooting nails at intervals of 20 cm during laying, sprayed with water, and cured at 50 DEG C to complete rapid construction.

[0099] The spraying and curing method is as follows: the water in the cement-based material is activated by spraying water twice, first spraying water for 4 min under the conditions of water temperature of 30 DEG C, spraying rate of 2 L / (min.m 2 ), and spraying distance of 30 cm to activate cement hydration, and then spraying water for 3 min at a spraying rate of 4 L / (min.m 2 ) and a spraying distance of 30 cm after 4 min.

[0100] Example 7

[0101] The preparation method of the cement-based composite coiled material for emergency rescue comprises the following steps:

[0102] Step (1) 33 parts of high-Belite sulphoaluminate cement, 18 parts of ordinary portland cement, 12 parts of fly ash, 7 parts of alpha-hemihydrate gypsum, 4 parts of calcium sulphoaluminate-calcium oxide expansive agent, 1.2 parts of polycarboxylic acid water reducer, 26 parts of silica sand, and 0.7 parts of sodium sulfate are ground together to a specific surface area of 420 m 2 / kg to obtain a hydraulic cement-based filler;

[0103] Step (2) inserts the powder filling pipe into the three-dimensional fabric prepared in Example 3, fills the hydraulic cement-based filler into the three-dimensional fabric, and vibrates to assist filling, to obtain the cement-based composite coiled material for emergency rescue.

[0104] The filling amount of the hydraulic cement-based filler is 3.2 kg / m 2 .

[0105] The rapid construction method of the cement-based composite coiled material for emergency rescue obtained in Example 7 is as follows: the cement-based composite coiled material for emergency rescue is hoisted and transported by a robot, continuously laid on a base surface, anchored and compacted by shooting nails at intervals of 22 cm during laying, sprayed with water, and cured at 40 DEG C to complete rapid construction.

[0106] The spraying, curing method is: spraying twice to activate the hydration of the cement-based material, first spraying for 3 min under the conditions of water temperature of 25℃, spraying rate of 3L / (min·m 2 ), spraying distance of 40 cm to activate the hydration of cement, and then spraying for 1 min after 6 min at the spraying rate of 3L / (min·m 2 ) and the spraying distance of 40 cm.

[0107] Example 8

[0108] The embodiment discloses a preparation method of a cement-based composite coiled material for emergency rescue, and comprises the following steps:

[0109] Step (1): 41 parts of high belite sulphoaluminate cement, 12 parts of ordinary portland cement, 14 parts of fly ash, 6 parts of alpha-hemihydrate gypsum, 5 parts of calcium oxide expanding agent, 0.7 parts of polycarboxylic acid water reducer, 32 parts of silica sand, and 0.2 parts of sodium bisulfate are finely ground to a specific surface area of 480 m 2 / kg to obtain a hydraulic cement-based filler;

[0110] Step (2): a powder filling pipe is inserted into the three-dimensional structure fabric prepared in Example 3 and having a waterproof wear-resistant coating on one side of the bottom layer, and the hydraulic cement-based filler is filled into the three-dimensional structure fabric, vibration-assisted filling is performed, and a cement-based composite coiled material for emergency rescue is obtained.

[0111] The filling amount of the hydraulic cement-based filler is 2.7 kg / m 2 .

[0112] The rapid construction method of the cement-based composite coiled material for emergency rescue obtained in Example 8 is as follows: the cement-based composite coiled material for emergency rescue is hoisted and transported by a robot, continuously laid on a base surface, shot and anchored at an interval of 28 cm and compacted while laying, sprayed, and cured at 10℃, and rapid construction is completed.

[0113] The spraying, curing method is: spraying twice to activate the hydration of the cement-based material, first spraying for 2 min under the conditions of water temperature of 30℃, spraying rate of 2L / (min·m 2 ), spraying distance of 45 cm to activate the hydration of cement, and then spraying for 3 min after 5 min at the spraying rate of 2L / (min·m 2 ) and the spraying distance of 35 cm.

[0114] Comparative Example 1

[0115] Comparative Example 1 and Example 4 are compared, and in the process of preparing the cement-based composite coiled material for emergency rescue, the three-dimensional structure fabric has no waterproof wear-resistant coating on one side of the bottom layer, and other conditions are unchanged.

[0116] Comparative Example 2

[0117] Comparative Example 2 and Example 4, in the process of preparing the cement-based composite coiled material for emergency rescue, the bottom of the three-dimensional fabric is not coated with a 3-mercaptopropyl trimethoxysilane ethanol aqueous solution, and other conditions remain unchanged.

[0118] Comparative Example 3

[0119] Comparative Example 3 and Example 4, in the process of preparing the cement-based composite coiled material for emergency rescue, no modified aramid nanofiber is added in the preparation process of the waterproof and wear-resistant coating on one side of the bottom of the three-dimensional fabric, and other conditions remain unchanged.

[0120] Comparative Example 4

[0121] Comparative Example 4 and Example 4, in the process of preparing the cement-based composite coiled material for emergency rescue, no modified aramid nanofiber is added, and other conditions remain unchanged.

[0122] Comparative Example 5

[0123] Comparative Example 5 and Example 4, in the process of preparing the cement-based composite coiled material for emergency rescue, no sorbitan oleate is added in the preparation process of the modified aramid nanofiber, and other conditions remain unchanged.

[0124] Experimental Example

[0125] I. Performance of the hydraulic cement-based filler

[0126] According to GB / T 17671-2021 Cement Mortar Strength Test Method (ISO Method), GB / T 1346-2024 Cement Standard Consistency Water Consumption, Setting Time and Stability Test Method, the performance of the hydraulic cement-based filler prepared in Examples 4-8 is tested, and the test results are shown in Table 2:

[0127] Table 2

[0128]

[0129] The cement-based composite coiled material for emergency rescue prepared in Examples 4-8 has the advantages of early strength and high strength, with a 1-day compressive strength > 50 MPa, a 28-day compressive strength > 65 MPa, a 1-day tensile strength > 3.5 MPa, and a 28-day tensile strength > 5.5 MPa, and the strength continues to increase with the increase of the curing age.

[0130] II. Performance of the cement-based composite coiled material for emergency rescue

[0131] The tensile properties and impermeability of the cement-based composite membrane for emergency rescue prepared and completed construction of Examples 4-8 and Comparative Examples 1-5 were tested according to the test method in the standard GB / T 35467-2017 "Pre-paved waterproofing membrane", the water channeling resistance was tested according to the test method in GB / T 23457, the abrasion resistance of the waterproof and wear-resistant coating on one side of the bottom of the three-dimensional fabric structure was determined by GB / T 1768-2021 "Paint and varnish-Determination of abrasion resistance-Rotary abrasion test", and the test results are shown in Table 3:

[0132] Table 3

[0133]

[0134] From Table 3, Examples 4-8 and Comparative Examples 1-5, it can be seen that the cement-based composite membrane for emergency rescue prepared by Example 4 has good water channeling resistance and mechanical properties. As can be seen from the comparison of Comparative Examples 1-5 and Examples 3-6, without the waterproof and wear-resistant coating, the interfacial bonding force between the three-dimensional fabric structure and the cement matrix is weakened, the tensile properties are decreased, the impermeability is significantly decreased, and the abrasion resistance is reduced; without the silane coupling agent, the adhesion between the polyurethane and the three-dimensional fabric structure is reduced, the interfacial bonding force is weakened, the tensile properties are decreased, and the abrasion resistance is reduced; without the modified aramid nanofiber, the mechanical properties of the coating are reduced, the strength of the coating is decreased, the tensile properties are decreased, the abrasion resistance is weakened, and the impermeability is decreased; the aramid nanofiber is not modified, the compatibility with the polyurethane is poor, the dispersion is uneven, the tensile properties are decreased, the hydrophobicity is reduced, the impermeability is decreased, and the abrasion resistance is reduced; without the sorbitan oleate, the dispersion of the aramid nanofiber is reduced, the tensile properties are decreased, and the abrasion resistance is reduced.

[0135] The above description is only a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent substitutions or changes within the technical scope disclosed by the present application and according to the technical solution and inventive concept of the present application, which should be covered within the protection scope of the present application.

[0136] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details, nor limit the application to the specific embodiments. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A cement-based composite roll material for emergency rescue and disaster relief, characterized in that, The emergency rescue cement-based composite roll material includes a three-dimensional structured fabric and a hydraulic cement-based filler. The hydraulic cement-based filler is filled in the three-dimensional structured fabric, and the bottom side of the three-dimensional structured fabric also includes a waterproof and wear-resistant coating. The hydraulic cement-based filler is prepared from the following components in parts by weight: 30-45 parts of high belite sulfoaluminate cement, 10-20 parts of ordinary silicate cement, 10-15 parts of fly ash, 5-8 parts of α-hemihydrate gypsum, 3-5 parts of expansion agent, 0.5-1.5 parts of polycarboxylate superplasticizer, 25-35 parts of silica sand, and 0.1-0.8 parts of setting regulator. The method for preparing the waterproof and wear-resistant coating on one side of the bottom of the three-dimensional structured fabric includes the following steps: P1: Polytetrahydrofurandiol, isophorone diisocyanate and dibutyltin dilaurate are mixed and stirred. Then 1,4-butanediol and 2,2-dimethylolpropionic acid are added and reacted. Triethanolamine is added and reacted again. Modified aramid nanofibers are added and the reaction continues. The mixture is cooled and hydroxyethyl methacrylate is added and reacted. Triethylamine is added to neutralize the reaction. Finally, water is added and stirred at high speed. 2-hydroxy-2-methylphenylacetone is added and stirred again to obtain reinforced polyurethane. P2: The bottom of the three-dimensional structured fabric is bombarded with plasma, and then the surface is coated with 3-mercaptopropyltrimethoxysilane ethanol aqueous solution. After drying, reinforced polyurethane is coated, irradiated with ultraviolet light, and cured to obtain a waterproof and wear-resistant coating on the bottom side of the lower surface layer of the three-dimensional structured fabric.

2. The cement-based composite roll for emergency rescue as described in claim 1, characterized in that, The setting regulator includes at least one of lithium carbonate, lithium sulfate, lithium nitrate, sodium sulfate, and sodium bisulfate; the high-belite sulfoaluminate cement has a strength grade ≥72.5 and comprises the following chemical components by weight percentage: SiO2 8.2-10.2%, Al2O3 28.4-31.9%, CaO 42.2-45.7%, Fe2O3 2.7-3.2%, K2O 0.04-0.06%, MgO 2.1-2.5%, Na2O 0.2-0.3%, SO3 6.2-14.2%; the silica sand has a SiO2 content ≥95% and a particle size range of 40-120 mesh, of which 40-80 mesh particles account for 60-70% and 80-120 mesh particles account for 30-40%; the fly ash is selected as Class I fly ash of type F with a strength activity index ≥80%; the expanding agent is one of calcium oxide expanding agent and calcium sulfoaluminate-calcium oxide expanding agent, with a CaO content ≥12%, specific surface area ≥350m² / kg, compressive strength ratio ≥90%, and 7-day restricted expansion rate in water ≥0.035%; the polycarboxylate superplasticizer is a powder with a water reduction rate ≥25% and an early-strength polycarboxylate high-performance superplasticizer.

3. The cement-based composite roll material for emergency rescue as described in claim 1, characterized in that, The three-dimensional structured fabric consists of an upper surface layer, a middle core layer, a lower surface layer, and a waterproof and wear-resistant coating on one side of the bottom of the lower surface layer. The overall thickness of the three-dimensional structured fabric is 10-15mm; the upper surface layer is 0.5-1mm thick, the middle core layer is 8-12mm high, and the lower surface layer is 0.5-1mm thick. The upper and lower surface layers are connected by the core yarn of the middle core layer, wherein the core yarn is arranged in a "double X" shape with a crossover angle of 60°-90° in the warp direction and in an inclined I shape in the weft direction. The yarns are arranged with an inclination angle of 30°-45°; both the upper and lower layers are plain weave fabrics with square holes; the warp and weft density of the upper layer is 4-8 threads / cm, and the hole side length is 1-2mm; the warp and weft density of the lower layer is 10-20 threads / cm, and the hole side length is 0.2-0.8mm; the warp and weft yarns of the upper and lower layers, as well as the core yarn of the three-dimensional structure fabric, are all made of PET flat yarn; the thickness of the PET flat yarn is 60-80μm, and the width is 2-4mm.

4. The cement-based composite roll for emergency rescue as described in claim 3, characterized in that, The method for preparing the PET flat yarn includes the following steps: PET plastic granules are vacuum dried at 150-160℃ and then melted and extruded through a screw extruder at a screw temperature of 250-270℃. The melt is cooled by a quenching roller at 55-60℃ to obtain a cast sheet. The cast sheet is then cut by a cutter to obtain PET filaments. The filaments are drawn into a longitudinal stretching machine by guide rollers. After preheating at 85-95℃, they undergo unidirectional secondary stretching at a temperature of 100-110℃ with a total stretching ratio of 7. They are then heat-set at 170-190℃ and finally wound to obtain PET flat yarn.

5. The cement-based composite roll material for emergency rescue as described in claim 1, characterized in that, In P1, the proportions of polytetrahydrofuran diol, isophorone diisocyanate, dibutyltin dilaurate, 1,4-butanediol, 2,2-dimethylolpropionic acid, triethanolamine, modified aramid nanofibers, hydroxyethyl methacrylate, triethylamine, water, and 2-hydroxy-2-methylphenylacetone are 40-80g: 35-70g: 5-10μL: 2-4g: 4.7-9.4g: 1.2-2.4g: 0.2-0.4g. g: 20-40g: 3.5-7g: 400-800g: 2-4g; Stirring conditions: stirring temperature 75-85℃, stirring time 0.5-1.5h, stirring speed 300-420rpm; reaction time 1.5-2.5h; re-reaction time 40-80min; conditions for continued reaction: continued reaction temperature 65-75℃, continued reaction time 0.5-1.5 h; cooling temperature: 55-65℃; hydroxyethyl methacrylate reaction time: 3.5-4.5h; neutralization reaction conditions: neutralization reaction temperature: 35-45℃, neutralization reaction time: 25-35min; high-speed stirring conditions: high-speed stirring time: 25-35min, high-speed stirring speed: 3000-4000rpm; continued stirring treatment time: 2-4h; in P2, plasma bombardment conditions: bombardment current: 50-60mA, bombardment time: 10-15min; volume ratio of ethanol to water in ethanol aqueous solution: 9:1; mass fraction of 3-mercaptopropyltrimethoxysilane ethanol aqueous solution: 2.5-3.5wt%; ultraviolet irradiation method: irradiation under 365nm ultraviolet light for 8-12min; curing method: curing temperature: 75-85℃, curing time: 10-14h; reinforced polyurethane coating amount: 30-50g / m 2 .

6. The cement-based composite roll for emergency rescue as described in claim 1, characterized in that, The preparation method of the modified aramid nanofibers includes the following steps: S1: Aramid nanofibers, γ-glycidyl etheroxypropyltrimethoxysilane and water are mixed, stirred and treated, reacted and washed to obtain treated aramid nanofibers. S2: Add the treated aramid nanofibers obtained in S1 and 3-mercaptopropyltrimethoxysilane to an ethanol solution, stir, react, and wash to obtain mercapto-treated aramid nanofibers. S3: Dehydrated sorbitan oleate and mercapto-modified aramid nanofibers are mixed, ultrasonically treated, and then mixed with 2-hydroxy-2-methylphenylacetone to obtain modified aramid nanofibers.

7. The cement-based composite roll for emergency rescue as described in claim 6, characterized in that, In step S1, the ratio of aramid nanofibers, γ-glycidyl etheroxypropyltrimethoxysilane, and water is 20-40 g: 2-4 mL: 78-150 mL; the stirring time is 5-15 min; the reaction conditions are: reaction temperature 75-85℃, reaction time 5-7 h; the washing method is: washing 3-5 times with ethanol solution and deionized water respectively. In step S2, the ratio of 3-mercaptopropyltrimethoxysilane and ethanol solution is 1-2 g: 79-160 mL; the stirring time is 5-15 min. Conditions: Reaction temperature 55-65℃, reaction time 6-10h; Washing method: Wash 3-5 times with ethanol and deionized water respectively; In S3, the ratio of dehydrated sorbitan oleate, mercapto-modified aramid nanofibers, and 2-hydroxy-2-methylphenylacetone is 4.3-9.6g: 6.9-14g: 0.05-0.1g; Ultrasonic treatment conditions: Ultrasonic treatment time 3-5h, ultrasonic treatment frequency 20-30kHz; Ultraviolet irradiation conditions: Irradiate with 365nm ultraviolet light for 30-60min.

8. The cement-based composite roll material for emergency rescue as described in claim 1, characterized in that, The preparation method of the cement-based composite roll material for emergency rescue includes the following steps: R1: Weigh out the following components according to the specified ratio: high-belite sulfoaluminate cement, ordinary silicate cement, fly ash, hemihydrate gypsum, expansion agent, polycarboxylate superplasticizer, silica sand, and setting regulator. Grind them together to a specific surface area of ​​400-500 m². 2 / kg, to obtain hydraulic cement-based filler; R2: Insert the powder filling tube into the three-dimensional structure fabric, fill the three-dimensional structure fabric with hydraulic cement-based filler, and use vibration to assist filling to obtain cement-based composite roll material for emergency rescue.

9. A rapid construction method for the cement-based composite membrane for emergency rescue as described in claim 1, characterized in that, The construction steps include the following: Robots are used to hoist and transport cement-based composite rolls for emergency rescue and disaster relief. The rolls are then continuously laid on the construction surface, with nails anchored at 20-30cm intervals as they are laid. Water is sprayed and the rolls are then cured to complete the rapid construction. The water spraying and curing method is as follows: activate the hydration of the cement-based material by spraying water in two stages. First, spray water at a temperature of 20-30℃ and a spraying rate of 2-4 L / (min·m). 2 Spray water for 2-4 minutes at a distance of 30-50 cm, then after 4-6 minutes, spray water at a rate of 2-4 L / (min·m). 2 The spraying rate is 30-50cm, the spraying distance is 30-50cm, and the spraying time is 1-3 minutes; the curing temperature is 0-50℃.

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