High abrasion resistant electrically conductive non-explosive concrete and method of making same

Abstract

The application discloses a kind of high wear resistance electrically conductive misfire concrete, composition is as follows according to weight fraction: cement 290-355 parts, fly ash 28-33 parts, ore powder 48-53 parts, misfire coarse aggregate 1045-1135 parts, misfire fine aggregate 710-770 parts, refractory material 10-15 parts, wear-resistant agent 3-5.5 parts, conductive material 2-5 parts, nano composite high molecular polymer 1.5-2.8 parts, additive 4.5-6.4 parts, water 140-185 parts;The application uses solid waste material and limestone as misfire aggregate, through the synergistic effect of refractory material, wear-resistant agent, conductive material and nano polymer composite material, significantly increase wear resistance and conductivity, and then reduce its static electricity in application aggregation;The working performance and mechanical properties of the obtained misfire concrete are excellent, and the concrete does not produce sparks and sparks after polishing impact, meets the fire prevention and explosion prevention requirements of fire fighting, and is suitable for popularization and use in special engineering with fire prevention and explosion prevention requirements.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of concrete materials, and particularly relates to non-sparking concrete and a preparation method thereof. BACKGROUND

[0002] Ordinary concrete and commonly used building materials may produce sparks when subjected to collision impact and friction, mainly due to the relatively large hardness of the building materials, the presence of metal substances in raw materials or impurities, excessive friction or impact, and the generation of static electricity during friction. If the building is located in a flammable and explosive place, such as an oil depot or a gas plant, an explosion or fire may occur, which may cause serious accidents endangering life safety.

[0003] Non-sparking concrete, also known as explosion-proof concrete, is an inorganic non-metallic material made of Portland cement as a cementitious material, mixed with certain admixtures, external agents, non-sparking aggregates, and water in a certain proportion. When it comes into mechanical motion such as friction or impact with metal or stone objects, it does not produce sparks or sparks, and will not cause flammable materials to ignite or explode. It is a special type of concrete with non-sparking properties, but due to its special requirements, it is not widely used in commercial concrete.

[0004] The invention patent "A non-sparking concrete and a preparation method thereof" (CN 202311357041.1) uses solid waste resources to select dolomite waste stones as aggregate, and uses fly ash and phosphorus slag powder as admixture, which makes full use of solid waste resources, and obtains non-sparking concrete with excellent workability and mechanical properties. The concrete does not produce sparks and sparks when subjected to metal polishing, impact, and chopping, meeting the call for comprehensive utilization of solid waste. However, the influence factors of friction static electricity and wear resistance are not considered as a whole. In the above related technology, the non-sparking concrete often produces static electricity due to friction damage, which may cause sparks and damage to the concrete structure, greatly shortening the service life of the non-sparking concrete. Therefore, how to reduce the wear and tear and static electricity accumulation of non-sparking concrete while increasing its non-sparking performance is a problem that needs to be solved urgently. SUMMARY

[0005] To solve the above problems, the present application provides a high wear-resistant conductive non-sparking concrete and a preparation method thereof. The non-sparking aggregate is made of solid waste materials and limestone rubble. Through the synergistic effect of refractory materials, wear-resistant agents, conductive materials, and nano-polymer composites, the wear resistance and conductivity are significantly improved, thereby reducing static electricity accumulation in application. The obtained non-sparking concrete has excellent workability and mechanical properties, and the concrete does not produce sparks and sparks when subjected to polishing and impact, meeting the fireproof and explosion-proof requirements of fire prevention, and being suitable for popularization and use in special projects with fireproof and explosion-proof requirements.

[0006] To achieve the above object, the technical scheme is as follows:

[0007] A high wear-resistant conductive non-sparking concrete, which is composed of cement 290-355 parts by weight, fly ash 28-33 parts by weight, mineral powder 48-53 parts by weight, non-sparking coarse aggregate 1045-1135 parts by weight, non-sparking fine aggregate 710-770 parts by weight, refractory material 10-15 parts by weight, wear-resistant agent 3-5.5 parts by weight, conductive material 2-5 parts by weight, nano-composite polymer 1.5-2.8 parts by weight, additive 4.5-6.4 parts by weight, and water 140-185 parts by weight.

[0008] The cement is ordinary Portland cement 42.5R, the fly ash is F-class II-grade fly ash with a density of 2.2-2.4 g / cm 3 and a loss on ignition of 5.0-5.4%, the mineral powder is S95 mineral powder with a density of 3.1-3.3 g / cm 3 and a flowability ratio of 95-97%, the non-sparking coarse aggregate is a mixture of limestone crushed stone and waste furnace lining with a mass ratio of (6.5-8.5) : 3.5 and a particle size of 5-16 mm and a whole crushing index of 13-15%, and the waste furnace lining is glass kiln waste alkaline refractory material mainly composed of calcium oxide and magnesium oxide.

[0009] The waste furnace lining is resistant to fire, mechanical impact and wear, which enhances the wear resistance and non-sparking performance of the non-sparking concrete, reduces the use of limestone crushed stone, is environmentally friendly and energy-saving, reduces waste emissions, and increases resource utilization.

[0010] The non-sparking fine aggregate is a mixture of limestone machine-made sand and waste solar panel particles with a mass ratio of (4-6) : 1, the limestone machine-made sand adopts continuous grading below 4.75 mm with a fineness modulus of 2.7-3.0, and the waste solar panel particles are obtained by crushing waste solar panels and mainly composed of polycrystalline silicon with a particle size of 0.15-0.3 mm.

[0011] The waste solar panel particles have excellent conductive performance due to their characteristics, significantly enhancing the conductive performance of the non-sparking concrete, reducing the static accumulation of the non-sparking concrete, and reducing the probability of sparking.

[0012] The refractory material is expanded vermiculite powder with a yellow-brown color and a particle size of 200-300 mesh.

[0013] The waste solar panel particles have excellent conductive performance due to their characteristics, significantly enhancing the conductive performance of the non-sparking concrete, reducing the static accumulation of the non-sparking concrete, and reducing the probability of sparking.

[0014] The refractory material is expanded vermiculite powder with a yellow-brown color and a particle size of 200-300 mesh.

[0015] The expanded vermiculite powder has good heat insulation performance and high temperature resistance, and can effectively reduce the combustion of concrete at high temperature.

[0016] According to the above scheme, the wear-resistant agent is a vinyl acetate-ethylene copolymer emulsion, polyacrylate and silica fume, the mass ratio of the vinyl acetate-ethylene copolymer emulsion, polyacrylate and silica fume is (2.1-3.5):(4.2-5.6):1; the silica fume is encrypted silica fume, the content of silicon dioxide is 92%-94%, and the bulk density is 450kg / m 3 ~ 500kg / m 3 .

[0017] The vinyl acetate-ethylene copolymer emulsion and polyacrylate are used to improve the bonding strength between the cement-based material and the aggregate, and then improve the wear resistance of the concrete. The silica fume has small fineness, which is used to fill the gap between the cement-based material and the aggregate, and then enhance the compactness and surface hardness of the concrete, and then improve the wear resistance of the concrete.

[0018] According to the above scheme, the conductive material is a mixture of carbonized rice husk powder and carbon fiber, and the mass ratio of the carbonized rice husk powder and the carbon fiber is 1:1; wherein the fineness of the carbonized rice husk powder is 100-200 meshes; and the size of the carbon fiber is 1-2 cm.

[0019] According to the above scheme, the preparation method of the nano-composite high polymer includes the following steps:

[0020] (1) graphite powder, sodium dodecyl benzene sulfonate, sodium hydroxide, and a part of deionized water are stirred and mixed uniformly, then hydroxymethyl cellulose is added and continues to be stirred and ultrasonic dispersed to obtain a suspension.

[0021] (2) sodium-based montmorillonite and ammonium polyphosphate are dispersed in the remaining deionized water at high speed, and after static standing, the suspension obtained in step 1 is mixed and dispersed at high speed;

[0022] (3) placed in a closed container, heated to 80℃ and stirred for 5h, and cooled to obtain a nano-composite high polymer;

[0023] The raw materials used are as follows: graphite powder 5-8 parts, hydroxymethyl cellulose 20-33 parts, sodium-based montmorillonite 44-58 parts, sodium dodecyl benzene sulfonate 0.5-1.0 parts, sodium hydroxide 1.1-1.5 parts, ammonium polyphosphate 2.2-3.2 parts, and deionized water 125-155 parts; the fineness of the graphite powder is 5-10μm; the fineness of the sodium-based montmorillonite is 100-300nm.

[0024] The graphite powder provides the conductive effect, the sodium dodecyl benzene sulfonate acts as a surfactant to disperse the suspension and also has the effect of guiding and eliminating harmful aggregation charges; the methylol cellulose improves the internal connectivity of the concrete to improve the mechanical properties of the concrete, and after being modified for fire resistance, it is carbonized in advance to form a dense carbon layer to inhibit further decomposition and improve the fire resistance and electrical conductivity of the base material; the sodium-based montmorillonite plays a role in fire resistance, and after being compounded with the cellulose and graphite, it has excellent wear resistance; the sodium hydroxide plays a role in promoting the dissolution of the methylol cellulose; the ammonium polyphosphate plays a role in assisting and synergizing combustion, and reacts with the hydroxyl groups on the pyranose ring of the cellulose to generate a dense carbon cell, thereby limiting the transfer of heat and improving the thermal stability of the concrete; through the synergy of the components, a nano-composite high polymer is generated, which has wear resistance, fire resistance and electrical conductivity.

[0025] According to the above scheme, the additive is a polycarboxylic acid superplasticizer with a solid content of 12wt% and a water-reducing rate of 26%.

[0026] The preparation method of the high-wear-resistance conductive non-permissive concrete comprises the following steps:

[0027] (1) Pre-mixing non-permissive coarse aggregate, non-permissive fine aggregate, wear-resistant agent and one-third of water in a mixer for 1 minute;

[0028] (2) Then, adding cement, fly ash, mineral powder, refractory material, conductive material, additive, the remaining two-thirds of water and nano-composite high polymer into the mixer and stirring for 3 minutes; after uniform stirring and mixing, the finished product of high-wear-resistance conductive non-permissive concrete is obtained.

[0029] Compared with the prior art, the present application has the following advantages:

[0030] The non-permissive coarse and fine aggregate of the present application is not only made of limestone crushed stone, but also mixed with glass kiln waste lining and waste solar panel particles. Due to the material quality, the two materials do not have the phenomenon of friction and ignition. The use of the two materials can significantly reduce the amount of limestone aggregate, thereby reducing production costs, and the use of different types of aggregate can also reduce the performance problems of single-type aggregate concrete. Secondly, the two materials are building solid waste resources, which can promote their recycling rate and reduce their impact on the environment, save energy and protect the environment, and are green and low-carbon. Finally, the waste slag has excellent wear resistance, and the waste solar panel particles have excellent electrical conductivity. The application of the two materials to the non-permissive concrete in combination with the wear-resistant agent and the conductive material can significantly improve the wear resistance and electrical conductivity of the non-permissive concrete.

[0031] The wear-resistant agent of the present application uses a mixture of three kinds of vinyl acetate-ethylene copolymer emulsion, polyacrylate and silica ash, wherein the mechanism of the vinyl acetate-ethylene copolymer emulsion and the polyacrylate is to form a network structure in the concrete, so that the bonding force between the cement-based material and the aggregate is stronger, thereby improving the wear resistance of the concrete, and the mechanism of the silica ash is to fill the gaps between the cement-based material and the aggregate to enhance the strength, compactness and surface hardness of the concrete, thereby improving the wear resistance of the concrete, the beneficial effects of the three can be superimposed, and the wear resistance of the concrete is further improved.

[0032] The nano-composite high polymer of the present application is a graphite / cellulose / clay nano high polymer, graphite and cellulose are added to montmorillonite, and through simple heating reaction, the montmorillonite and graphite are uniformly dispersed in the matrix of the polymer to form a "delaminated nano composite material", and through the synergistic effect of sodium dodecyl benzene sulfonate and ammonium polyphosphate, a high-performance nano-composite high polymer with wear resistance, flame retardance and conductivity is generated, and the application of the nano-composite high polymer in non-firing concrete can significantly improve the wear resistance, conductivity and flame retardance of the non-firing concrete and reduce the ignition probability.

[0033] The present application not only increases the non-firing performance of the non-firing concrete, but also adds refractory materials and montmorillonite components, which play a role in heat insulation and preventing combustible gas from escaping during thermal decomposition and combustion, and can effectively reduce the combustion of the non-firing concrete at high temperature. The present application aims to improve the non-firing performance of the non-firing concrete while reducing the combustion reaction after ignition, and to ensure the service performance of building construction and to provide performance guarantee for special construction. DETAILED DESCRIPTION

[0034] The following examples further illustrate the technical solutions of the present application, but are not intended to limit the scope of protection of the present application.

[0035] The specific embodiment provides a preparation method of a nano-composite high polymer:

[0036] (1) Put graphite powder, sodium dodecyl benzene sulfonate, sodium hydroxide and a part of deionized water in a beaker, and stir under a magnetic stirrer for 1h, then add hydroxymethyl cellulose and continue to stir for 2h, then take out the beaker and place it under an ultrasonic disperser for ultrasonic dispersion for 1h to obtain a suspension;

[0037] (2) Disperse sodium-based montmorillonite and ammonium polyphosphate in the remaining deionized water, and use a digital high-speed disperser to run at a speed of 8000rpm for 1.5h; after static stopping, add the stirred suspension of step (1), and continue to run at a speed of 8000rpm for 2h to obtain a uniformly mixed liquid;

[0038] (3) Finally, pour the mixed solution into a beaker, close the cup, and place it on a magnetic stirrer at 80°C for 5h. After cooling, the nanocomposite polymer is obtained.

[0039] The embodiment further provides a preparation method of the high-wear-resistance electrically-conductive non-explosive concrete.

[0040] (1) Put the weighed non-explosive coarse aggregate, non-explosive fine aggregate, wear-resistant agent and one-third of water into a cleaned stirrer and premix for 1 min;

[0041] (2) Then, put the cement, fly ash, mineral powder, refractory material, conductive material, additive, the remaining two-thirds of water and nanocomposite polymer into the stirrer and stir for 3 min. After uniform stirring, the high-wear-resistance electrically-conductive non-explosive concrete is obtained.

[0042] In the following examples, the cement is ordinary Portland cement 42.5R; the fly ash is F-class II-grade fly ash with a density of 2.4 g / cm 3 and a loss on ignition of 5.4%; the mineral powder is S95 mineral powder with a density of 3.1 g / cm 3 and a flowability of 97%; the limestone crushed stone has a particle size of 5-16 mm and an overall crushing index of 13-15%; the waste furnace lining is glass kiln waste alkaline refractory material with a particle size of 5-16 mm and an overall crushing index of 13-15%; the limestone machine-made sand is continuous gradation machine sand with a particle size of 4.75 mm or less and a fineness modulus of 2.7-3.0; the waste solar panel particles mainly consist of polycrystalline silicon with a particle size of 0.15-0.3 mm; the expanded vermiculite powder is yellow-brown in color and has a particle size of 200-300 mesh; the carbonized rice husk powder is obtained by grinding carbonized rice husk, which is purchased through a conventional market channel and has a size of 2-4 cm, and then ground by a ball mill to obtain the carbonized rice husk powder with a fineness of 100-200 mesh; and the carbon fiber has a size of 1-2 cm.

[0043] Example 1

[0044] A high-wear-resistance electrically-conductive non-explosive concrete has the following components:

[0045] Cement 300 parts, fly ash 28 parts, mineral powder 48 parts, non-explosive coarse aggregate 1055 parts, non-explosive fine aggregate 725 parts, refractory material 10 parts, wear-resistant agent 3.2 parts, conductive material 2.8 parts, nanocomposite polymer 1.8 parts and water 150 parts.

[0046] The mass ratio of limestone crushed stone to waste furnace lining in the non-ignition coarse aggregate is 6.5:3.5; the mass ratio of limestone machine-made sand to waste solar panel particles in the non-ignition fine aggregate is 4:1; the mass ratio of ethylene-vinyl acetate copolymer emulsion, polyacrylate and silica ash in the wear-resistant agent is 2.5:4.4:1; and the mass ratio of carbonized rice husk powder to carbon fiber in the conductive material is 1:1.

[0047] In the nano-composite high polymer, graphite powder is 5 parts, hydroxymethyl cellulose is 22 parts, sodium-based montmorillonite is 48 parts, sodium dodecyl benzene sulfonate is 0.6 part, sodium hydroxide is 1.2 part, ammonium polyphosphate is 2.5 parts, and deionized water is 130 parts.

[0048] Example 2

[0049] Cement is 320 parts, fly ash is 30 parts, mineral powder is 51 parts, non-ignition coarse aggregate is 1070 parts, non-ignition fine aggregate is 750 parts, refractory material is 12 parts, wear-resistant agent is 4.1 parts, conductive material is 3.5 parts, nano-composite high polymer is 2.0 parts, and water is 160 parts.

[0050] The mass ratio of limestone crushed stone to waste furnace lining in the non-ignition coarse aggregate is 7:3.5; the mass ratio of limestone machine-made sand to waste solar panel particles in the non-ignition fine aggregate is 5:1; the mass ratio of ethylene-vinyl acetate copolymer emulsion, polyacrylate and silica ash in the wear-resistant agent is 3:4.8:1; and the mass ratio of carbonized rice husk powder to carbon fiber in the conductive material is 1:1.

[0051] In the nano-composite high polymer, graphite powder is 6.5 parts, hydroxymethyl cellulose is 26 parts, sodium-based montmorillonite is 52 parts, sodium dodecyl benzene sulfonate is 0.8 part, sodium hydroxide is 1.2 part, ammonium polyphosphate is 2.7 parts, and deionized water is 142 parts.

[0052] Example 3

[0053] Cement is 350 parts, fly ash is 32 parts, mineral powder is 52 parts, non-ignition coarse aggregate is 1110 parts, non-ignition fine aggregate is 770 parts, refractory material is 15 parts, wear-resistant agent is 5 parts, conductive material is 4.5 parts, nano-composite high polymer is 2.5 parts, additive is 2.6 parts, and water is 170 parts.

[0054] The mass ratio of limestone crushed stone to waste furnace lining in the non-ignition coarse aggregate is 8.1:3.5; the mass ratio of limestone machine-made sand to waste solar panel particles in the non-ignition fine aggregate is 6:1; the mass ratio of ethylene-vinyl acetate copolymer emulsion, polyacrylate and silica ash in the wear-resistant agent is 3.2:5.4:1; and the mass ratio of carbonized rice husk powder to carbon fiber in the conductive material is 1:1.

[0055] The nanocomposite polymer contains 7.7 parts of graphite powder, 32 parts of hydroxymethyl cellulose, 56 parts of sodium-based montmorillonite, 1.0 part of sodium dodecyl benzene sulfonate, 1.4 parts of sodium hydroxide, 3.0 parts of ammonium polyphosphate, and 150 parts of deionized water.

[0056] The base comparative example

[0057] Based on the example 2, the waste furnace lining, the waste solar panel particles, the refractory material, the wear-resistant agent, the conductive material, and the nanocomposite polymer are not added, and other components and preparation processes remain unchanged.

[0058] Comparative example 1

[0059] Based on the example 2, the coarse aggregate and the fine aggregate are both replaced by single limestone aggregate, and other components and preparation processes remain unchanged.

[0060] Comparative example 2

[0061] Based on the example 2, the refractory material of expanded vermiculite powder is not added, and other components and preparation processes remain unchanged.

[0062] Comparative example 3

[0063] Based on the example 2, the wear-resistant agent component is not added, and other components and preparation processes remain unchanged.

[0064] Comparative example 4

[0065] Based on the example 2, the conductive material component is not added, and other components and preparation processes remain unchanged.

[0066] Comparative example 5

[0067] Based on the example 2, the nanocomposite polymer component is not added, and other components and preparation processes remain unchanged.

[0068] The performance tests of the non-ignition concrete of the above examples 1-3, the base comparative example, and the comparative examples 1-5 are carried out, including the compressive strength, the non-ignition performance, the wear-resistant performance, the fire-resistant performance, and the conductive performance, and the results are shown in Table 1. The compressive strength of each group of non-ignition concrete meets the standard.

[0069] Non-ignition performance: the test grinding wheel has a diameter of 150 mm, and its rotating speed is 1000 r / min during the test. When each test piece is rubbed on the grinding wheel with a pressure of 20 N, the test piece is contacted with the grinding wheel at any part, and the place where the concrete test piece and the grinding wheel are rubbed is carefully observed to see whether there is any spark.

[0070] Abrasion resistance: The abrasion resistance of the concrete was detected according to the method of the national standard GB T 50081-2019 “Standard for test methods of physical and mechanical properties of concrete”. The size of the concrete test piece was 150 mm x 150 mm x 150 mm, and the abrasion resistance was represented by the abrasion loss.

[0071] Fire resistance: The fire resistance of the concrete was detected according to the national standard GB / T 7322-2017 “Test method for fire resistance of refractory materials”. The test piece was prepared as a truncated triangular pyramid, and the fire resistance was represented by the fire resistance temperature of the test piece, which was heated at a specified rate until the tip of the pyramid contacted the bottom tray.

[0072] Conductive property: The resistivity of the standard test block of the concrete was measured by using a concrete resistivity tester.

[0073] Table 1 Performance parameters of non-explosive concrete

[0074] Category Ignition performance Wear (g / m 2 ) Fire resistance (°C) Resistivity (Ω-cm) Example 1 Not ignited 2.56 262 4.3 Example 2 Not ignited 1.65 346 3.0 Example 3 Not ignited 2.16 304 3.8 Base Comparative Example Not ignited 3.74 143 7.8 Comparative Example 1 Not ignited 2.35 322 3.5 Comparative Example 2 Not ignited 1.71 228 3.2 Comparative Example 3 Not ignited 3.08 335 3.3 Comparative Example 4 Not ignited 1.67 329 6.3 Comparative Example 5 Not ignited 2.03 197 4.8

[0075] As can be seen from Table 1, the non-explosive performance of each group of non-explosive concrete meets the standard, and the parameters of the non-explosive concrete of Examples 1-3 and Comparative Examples 1-5 are better than those of the basic comparative example, which shows that the addition of each component significantly improves the performance of the non-explosive concrete, optimizes the use performance of the non-explosive concrete, and reduces the non-explosive performance of the concrete.

[0076] As can be seen from Comparative Examples 1-3, the performance of the non-explosive concrete increases first and then decreases with the increase of the addition amount of each component, but is still better than that of the basic comparative example; this shows that when the addition amount of the component is small, the performance of the non-explosive concrete gradually improves; when the addition amount reaches a certain point, if the addition amount continues to increase, the performance of the non-explosive concrete will gradually decrease, on the one hand, because the mechanical properties and density of the concrete decrease when the addition amount is too high, which in turn causes the abrasion loss to increase, the fire resistance to decrease, and the resistivity to increase; on the other hand, when the addition amount of the component increases, the component cannot be uniformly dispersed in the concrete, which not only cannot improve the performance of the concrete, but also has a negative impact on the performance of the concrete, therefore, attention should be paid to the addition amount when the component is added to the non-explosive concrete. Overall, the performance of the non-explosive concrete of Example 2 is excellent, and can be widely applied to special projects with fire and explosion prevention requirements.

[0077] Compared with Comparative Example 2 and Comparative Examples 1-5, when the composite aggregate is replaced by single limestone aggregate, the abrasion amount of the non-ignition concrete increases, the fire resistance decreases, and the resistivity increases, wherein the abrasion amount is most affected, the resistivity is second, and the fire resistance is last, which shows that the waste slag and waste solar panel particles can significantly improve the performance of the non-ignition concrete; when the fireproof material expanded vermiculite powder is not mixed, the fire resistance of the non-ignition concrete decreases significantly, but the other two performances are basically unchanged, which shows that the expanded vermiculite powder only plays a single fire-retardant role and basically has no effect on other performances; when the wear-resistant agent is not mixed, the abrasion amount of the non-ignition concrete increases significantly, but the other two performances are basically unchanged, which shows that the wear-resistant agent only plays a single wear-resistant role and basically has no effect on other performances; when the conductive material is not mixed, the resistivity of the non-ignition concrete increases significantly, but the other two performances are basically unchanged, which shows that the conductive material only plays a single conductive role and basically has no effect on other performances; when the nano-composite high polymer is not mixed, the abrasion amount of the non-ignition concrete increases, the fire resistance decreases, and the resistivity increases, wherein the fire resistance is most affected, the resistivity is second, and the abrasion amount is last, which shows that the nano-composite high polymer can significantly improve the performance of the non-ignition concrete.

[0078] The reasons for general ignition include two aspects, mechanical impact and static electricity generated by friction. When the spark reaches a certain energy and the external conditions are met, combustion and explosion disasters occur, so the non-ignition property of the concrete must be required to ensure safety. The conductive material is beneficial to the rapid transfer of electric charge, can quickly lead away the adverse electric charge, avoids the concentration of electric charge to generate sparks, and thus improves the non-ignition performance of the concrete; the wear-resistant agent can reduce unnecessary friction loss and reduce the possibility of sparking; the fireproof material can improve the fire resistance of the concrete and effectively reduce the combustibility of the non-ignition concrete at high temperature; the composite aggregate can effectively improve the working performance of the concrete, and the nano-composite high polymer can improve the wear resistance and fire resistance of the concrete, reduce the electrical conductivity, and overall improve the non-ignition performance of the concrete. In summary, the composite aggregate, the fireproof material, the wear-resistant agent, the conductive material, and the nano-composite high polymer can respectively enhance the non-ignition performance of the non-ignition concrete from single or multiple angles, and the overall non-ignition performance of the non-ignition concrete is improved under the synergistic effect of the components.

[0079] The high wear-resistant conductive non-ignition concrete prepared by the application has excellent non-ignition performance and wear-resistant performance and has good application value. In addition, the solid waste used in the application plays a positive role in the recycling and reuse of industrial solid materials and has a significant effect on the energy saving, emission reduction, and green and sustainable development of the construction industry.

[0080] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A type of highly wear-resistant, electrically conductive, non-sparking concrete, characterized in that... The composition by weight is as follows: Cement 290-355 parts, fly ash 28-33 parts, mineral powder 48-53 parts, non-sparking coarse aggregate 1045-1135 parts, non-sparking fine aggregate 710-770 parts, refractory material 10-15 parts, wear-resistant agent 3-5.5 parts, conductive material 2-5 parts, nano-composite polymer material 1.5-2.8 parts, polycarboxylate superplasticizer 4.5-6.4 parts, water 140-185 parts; The preparation method of the nanocomposite polymer material includes the following steps: (1) Mix graphite powder, sodium dodecylbenzenesulfonate, sodium hydroxide and a portion of deionized water evenly, then add hydroxymethyl cellulose and continue stirring and ultrasonic dispersion to obtain a suspension; (2) Disperse sodium montmorillonite and ammonium polyphosphate in the remaining deionized water and stir at high speed. After standing still, mix with the suspension obtained in step 1 and stir at high speed. (3) Place it in a closed container, heat it to 80°C and stir for 5 hours. After cooling, the nanocomposite polymer material is obtained. The raw materials used, by weight, are: 5-8 parts graphite powder, 20-33 parts hydroxymethyl cellulose, 44-58 parts sodium montmorillonite, 0.5-1.0 parts sodium dodecylbenzenesulfonate, 1.1-1.5 parts sodium hydroxide, 2.2-3.2 parts ammonium polyphosphate, and 125-155 parts deionized water; the fineness of the graphite powder is 5-10 μm; the fineness of the sodium montmorillonite is 100-300 nm.

2. The high wear-resistant, conductive, non-sparking concrete as described in claim 1, characterized in that... The cement is ordinary Portland cement 42.5R; the fly ash is Class F, Grade II fly ash, with a density of 2.2~2.4 g / cm³. 3 The loss on ignition is 5.0~5.4%; the mineral powder is S95 mineral powder with a density of 3.1~3.3 g / cm³. 3 The fluidity ratio is 95-97%.

3. The high wear-resistant, conductive, non-sparking concrete as described in claim 1, characterized in that... The non-sparking coarse aggregate is a mixture of limestone crushed stone and waste furnace lining, with a mass ratio of limestone crushed stone to waste furnace lining of (6.5~8.5):3.5, a particle size of 5~16mm, and an overall crushing index of 13~15%; the waste furnace lining is waste alkaline refractory material from glass kilns, and its main components are calcium oxide and magnesium oxide.

4. The high wear-resistant, conductive, non-sparking concrete as described in claim 1, characterized in that... The non-sparking fine aggregate is a mixture of limestone manufactured sand and waste solar panel particles, with a mass ratio of limestone manufactured sand to waste solar panel particles of (4~6):1; the limestone manufactured sand adopts a continuous gradation of less than 4.75mm and a fineness modulus of 2.7~3.0; the waste solar panel particles are obtained by crushing waste solar panels, the main component of which is polycrystalline silicon, and the particle size is 0.15mm~0.3mm.

5. The high wear-resistant, conductive, non-sparking concrete as described in claim 1, characterized in that... The refractory material is expanded vermiculite powder, which is yellowish-brown in color and has a particle size of 200-300 mesh.

6. The high wear-resistant, conductive, non-sparking concrete as described in claim 1, characterized in that... The wear-resistant agent is a mixture of vinyl acetate-ethylene copolymer emulsion, polyacrylate, and silica fume, with a mass ratio of vinyl acetate-ethylene copolymer emulsion, polyacrylate, and silica fume of (2.1~3.5):(4.2~5.6):1; the silica fume is dense silica fume with a silica content of 92%~94% and a bulk density of 450 kg / m³. 3 ~500kg / m 3 .

7. The high wear-resistant, conductive, non-sparking concrete as described in claim 1, characterized in that... The conductive material is a mixture of carbonized rice husk powder and carbon fiber, with a mass ratio of 1:1; wherein the fineness of the carbonized rice husk powder is 100~200 mesh; and the size of the carbon fiber is 1~2 cm.

8. The high wear-resistant, conductive, non-sparking concrete as described in claim 1, characterized in that... The polycarboxylate superplasticizer has a solid content of 12wt% and a water reduction rate of 26%.

9. The method for preparing the high wear-resistant, conductive, non-sparking concrete according to claim 1, characterized in that... Includes the following steps: (1) Premix the non-sparking coarse aggregate, non-sparking fine aggregate, abrasion resistant agent and one-third water in a mixer for 1 minute; (2) Then add cement, fly ash, mineral powder, refractory materials, conductive materials, polycarboxylate superplasticizer, the remaining two-thirds water and nanocomposite polymer materials into the mixer and stir for 3 minutes; after stirring and mixing evenly, pour out to obtain the finished high wear-resistant conductive non-sparking concrete.