High-ductility concrete as well as preparation method and application thereof

Abstract

The invention relates to the technical field of cement-based building materials, in particular to high-ductility concrete and a preparation method and application thereof.The high-ductility concrete is prepared from 285-675 parts of cement, 500-700 parts of fly ash, 400-485 parts of modified ceramic powder, 400-485 parts of modified ceramic fine aggregate, 10-20 parts of polyethylene fiber, 300-450 parts of water, 3-8 parts of efficient water reducing agent and 1-5 parts of thickening agent. The modified ceramic powder and the modified ceramic fine aggregate are used as raw materials, so that the pressure of waste ceramic on the environment is relieved, the dependence of the concrete on non-renewable resources such as natural gravel is reduced, and the production cost of the concrete is reduced. And the micro-aggregate effect of the modified ceramic powder and the high hardness characteristic of the modified ceramic fine aggregate have a synergistic effect, so that the concrete has the characteristics of high ductility and high strength (high compressive strength and tensile strength).

Description

Technical Field

[0001] This invention relates to the field of cement-based building materials technology, and in particular to a high-ductility concrete, its preparation method, and its application. Background Technology

[0002] With the acceleration of urbanization and the booming development of the construction industry, a large number of buildings are being demolished and rebuilt. Traditional building demolition methods often generate a large amount of construction waste, of which discarded ceramics make up a significant portion. These discarded ceramics not only occupy a large amount of land resources but also cause serious environmental pollution. As the amount of discarded ceramics continues to increase, their recycling has become an important issue that urgently needs to be addressed in urban management.

[0003] Using waste ceramics as raw materials for building materials can reduce the reliance on natural resources and lower construction costs, while also aligning with the sustainable development concepts of energy conservation, emission reduction, and resource recycling. However, while adding waste ceramics to concrete can improve its strength and durability, it also reduces the concrete's tensile strength, toughness, and fatigue resistance, making it unsuitable for effective use as a building material. Summary of the Invention

[0004] The purpose of this invention is to provide a high-ductility concrete, its preparation method and application, to solve the defects of existing waste ceramics when applied to concrete, such as poor tensile strength, toughness and fatigue resistance.

[0005] To achieve the above objectives, the present invention provides a high-ductility concrete comprising the following raw materials in parts by weight: 285-675 parts cement, 500-700 parts fly ash, 400-485 parts modified ceramic powder, 400-485 parts modified ceramic fine aggregate, 10-20 parts polyethylene fiber, 300-450 parts water, 3-8 parts high-efficiency water-reducing agent, and 1-5 parts thickener.

[0006] In this invention, cement includes ordinary silicate cement or silicate cement.

[0007] In this invention, the 28-day compressive strength of cement is ≥42.5 MPa.

[0008] In this invention, the fly ash has a particle size of 50-400 μm, preferably 45-400 μm, and a specific surface area ≥400 m². 2 / kg.

[0009] In this invention, the fly ash is either Grade I fly ash or Grade II fly ash, preferably Grade I fly ash. Grade I fly ash has a fine powdery and spherical particle structure, which can fill the voids in concrete and improve the fluidity and plasticity of concrete.

[0010] In this invention, the preparation process of the modified ceramic powder includes: The ceramic is crushed and ball-milled to obtain ceramic powder. The ceramic powder is then calcined at 600-800℃ for 1-4 hours to obtain modified ceramic powder. The particle size of the modified ceramic powder is 0.1-1μm.

[0011] In the preparation of modified ceramic powder, the sources of ceramics include construction sites, ceramic factories, or waste ceramics collected in daily life.

[0012] In the preparation of modified ceramic powder, the ceramic is first cleaned and dried before crushing. The purpose of cleaning is to remove dirt, oil, and other impurities from the ceramic surface. Drying is done by air drying or oven drying.

[0013] In the preparation of modified ceramic powder, calcining the ceramic powder at a temperature of 600-800℃ for 1-4 hours can gradually transform the original amorphous Al2O3 structure of the ceramic powder into an α-Al2O3 (corundum) structure, thereby improving the hardness and density of the ceramic powder and eliminating organic impurities.

[0014] In this invention, the modified ceramic fine aggregate has a particle size ≤2.36mm, a pore size of 1-10μm, a porosity of 15%-25%, and a fineness modulus of 2.20-3.00; The preparation process of modified ceramic fine aggregate includes: The ceramic is crushed and ball-milled to obtain fine ceramic aggregate. The fine ceramic aggregate is then calcined at 1100-1300℃ for 2-6 hours to obtain modified fine ceramic aggregate.

[0015] In the preparation of modified ceramic fine aggregates, the sources of ceramics include construction sites, ceramic factories, or waste ceramics collected in daily life.

[0016] In the preparation of modified ceramic fine aggregate, the ceramic is crushed to obtain coarse ceramic particles with a particle size ≤50mm. These coarse particles are then washed, magnetically separated, dried, and ball-milled. The purpose of washing and magnetic separation is to remove impurities from the coarse ceramic particles. Drying is achieved by air drying or oven drying.

[0017] In the preparation of modified ceramic fine aggregate, calcining the ceramic fine aggregate at a temperature of 1100-1300℃ for 2-6 hours can regulate the porosity of the ceramic fine aggregate, enabling it to have an "internal curing" function. During the concrete curing process, it slowly releases moisture, reducing autogenous shrinkage. At the same time, the porous structure can also reduce the weight of concrete, achieving lightweight concrete.

[0018] In this invention, the polyethylene fiber has a length of 12-36 mm, a diameter of 20-40 μm, an aspect ratio of ≥600, a breaking elongation of 2%-3%, and a tensile strength of >3000 MPa.

[0019] In this invention, the high-efficiency water-reducing agent includes a polycarboxylate water-reducing agent, and the thickener includes a cellulose ether.

[0020] In this invention, the polycarboxylate superplasticizer is preferably a polycarboxylate superplasticizer powder, and the cellulose ether is preferably hydroxypropyl methylcellulose ether.

[0021] The present invention also provides a method for preparing the above-mentioned high-ductility concrete, comprising the following steps: S1. Mix modified ceramic fine aggregate, cement, fly ash, and high-efficiency water-reducing agent to obtain dry material; S2. Add water and thickener to the dry material and stir to obtain the wet material; S3. Add polyethylene fiber to the wet material and stir to obtain the material; S4. Add modified ceramic powder to the material and stir to obtain a slurry; S5. The slurry is molded and cured to obtain high-ductility concrete.

[0022] In this invention, the mixing speed in S1 is 100-135 r / min, preferably 115-130 r / min, and the mixing time is 1-4 min; the stirring speed in S2 is 100-135 r / min, preferably 115-130 r / min, and the stirring time is 1-6 min; the stirring speed in S3 is 180-230 r / min, preferably 185-200 r / min, and the stirring time is 3-4 min; the stirring speed in S4 is 100-135 r / min, preferably 115-130 r / min, and the stirring time is 3-5 min.

[0023] In this invention, the stirring speed in S3 is 180-230 r / min, which can make the polyethylene fibers uniformly dispersed and reduce the occurrence of agglomeration.

[0024] In this invention, the molding method in S4 is vibration molding, and the vibration molding time is 3-4 minutes; the curing temperature in S4 is 18-25℃, and the curing days are 28 days.

[0025] The present invention also provides the application of the above-mentioned high ductility concrete in the field of building materials.

[0026] The present invention has the following beneficial effects: This invention provides a high-ductility concrete comprising the following raw materials in parts by weight: 285-675 parts cement, 500-700 parts fly ash, 400-485 parts modified ceramic powder, 400-485 parts modified ceramic fine aggregate, 10-20 parts polyethylene fiber, 300-450 parts water, 3-8 parts high-efficiency water-reducing agent, and 1-5 parts thickener. This invention uses modified ceramic powder and modified ceramic fine aggregate as raw materials, alleviating the environmental pressure caused by waste ceramics, reducing the accumulation of waste ceramics, lowering the production cost of concrete, and reducing the concrete's dependence on non-renewable resources such as natural sand and gravel, thus conforming to the concepts of circular economy and low-carbon development.

[0027] The micro-aggregate effect of modified ceramic powder and the high hardness of modified ceramic fine aggregate work synergistically to give concrete both high ductility and high strength (high compressive and tensile strength). Its strain hardening characteristics can withstand deformation several times that of ordinary concrete, and under dynamic loads such as earthquakes, it reduces the risk of structural damage through energy dissipation, ensuring structural safety.

[0028] Furthermore, modified ceramic powder can deeply participate in the hydration process, significantly improving the activation index of concrete. It can maintain the strength stability of concrete while also forming a dense packing structure through the micro-aggregate morphology effect, thereby enhancing the early strength development rate and long-term durability of concrete. The particles adhering to the surface of the modified ceramic fine aggregate can refine the interfacial transition zone and reduce porosity; moreover, its interlocking mechanism, combined with the micro-expansion effect of the modified ceramic powder, can inhibit the shrinkage and cracking of concrete.

[0029] This invention uses fly ash as a raw material to improve the fluidity of concrete, making it easier to process and pour. The fine powder particles in fly ash can form a cementing system with the colloids in concrete, increasing the concrete's adhesion, cohesion, and ductility. Furthermore, the fine powder particles of fly ash also enhance the interfacial bonding performance between polyethylene fibers and the concrete matrix, reducing the tendency for concrete to crack. It can also fill the small pores in concrete, improving its self-compacting properties, helping to reduce permeability and porosity, and improving durability and impermeability. Secondly, the fine powder and spherical particles in fly ash can fill the micropores in concrete, reducing concrete shrinkage.

[0030] This invention uses polyethylene fiber as a raw material. The rough surface and high strength of polyethylene fiber significantly improve bonding strength and enhance the toughness of concrete. Furthermore, polyethylene fiber has good hydrophobicity, allowing it to disperse easily in the concrete system and maintain fluidity. Polyethylene fiber also exhibits excellent alkali resistance and low-temperature resistance (good low-temperature toughness), making the prepared concrete suitable for harsh environments. At the same time, polyethylene fiber is low in cost, effectively reducing the preparation cost of concrete.

[0031] This invention also provides a method for preparing high-ductility concrete, comprising the following steps: S1, mixing modified ceramic fine aggregate, cement, fly ash, and a high-efficiency water-reducing agent to obtain a dry material; S2, adding water and a thickener to the dry material and stirring to obtain a wet material; S3, adding polyethylene fiber to the wet material and stirring to obtain a paste; S4, adding modified ceramic powder to the paste and stirring to obtain a slurry; S5, molding and curing the slurry to obtain high-ductility concrete. The preparation method provided by this invention is simple, easy to operate, has a short curing cycle, reduces curing costs, and is suitable for large-scale production.

[0032] The technical solution of the present invention will be further described in detail below through embodiments. Detailed Implementation

[0033] The present invention will be further described below with reference to embodiments. Unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art. The features mentioned above or in the specific examples mentioned in this invention can be combined arbitrarily, and these specific embodiments are only used to illustrate the invention and are not intended to limit the scope of the invention.

[0034] In the following cases, the fly ash was Grade I fly ash, purchased from Nanjing Power Plant; The polycarboxylate superplasticizer powder was purchased from Shanghai Sanrui Polymer Materials Co., Ltd. as a high-efficiency polycarboxylate powder superplasticizer. The quartz sand was purchased from a sand quarry in Fengxian, Shanghai.

[0035] Example 1 A high-ductility concrete comprises the following raw materials in parts by weight: 530 parts silicate cement, 630 parts fly ash, 420 parts modified ceramic powder, 400 parts modified ceramic fine aggregate, 11 parts polyethylene fiber, 300 parts water, 4 parts polycarboxylate superplasticizer powder, and 1 part hydroxypropyl methylcellulose ether.

[0036] Among them, the 28-day compressive strength of silicate cement is ≥42.5 MPa; The fly ash is grade I fly ash, with a particle size of 400 μm and a specific surface area ≥ 400 m². 2 / kg; The polyethylene fiber has a length of 12 mm, a diameter of 20 μm, an aspect ratio of ≥600, a breaking elongation of 3%, and a tensile strength of >3000 MPa; The ceramics used in the modified ceramic powder and modified ceramic fine aggregate both come from construction sites.

[0037] The preparation process of modified ceramic powder includes: The ceramics are cleaned, dried, crushed, and ball-milled to obtain ceramic powder. The ceramic powder is then calcined at 800℃ for 4 hours to obtain modified ceramic powder with a particle size of 1μm.

[0038] The preparation process of modified ceramic fine aggregate includes: After crushing the ceramics, coarse ceramic particles with a particle size ≤50mm are obtained. The coarse ceramic particles are washed, magnetically separated, dried, and ball-milled to obtain fine ceramic aggregate with a particle size ≤2.36mm. The fine ceramic aggregate is calcined at 1100℃ for 5 hours to obtain modified fine ceramic aggregate.

[0039] The above-mentioned method for preparing high-ductility concrete includes the following steps: S1. Mix modified ceramic fine aggregate, silicate cement, fly ash, and polycarboxylate superplasticizer powder at a speed of 135 r / min for 3 min to obtain dry material; S2. Add water and hydroxypropyl methylcellulose ether to the dry material and stir at 135 r / min for 5 min to obtain the wet material. S3. Add polyethylene fiber to the wet material and stir at 200 r / min for 4 min to obtain the material; S4. Add modified ceramic powder to the material and stir at 135 r / min for 5 min to obtain a slurry; S5. Vibrate the slurry for 4 minutes and cure it at 25°C for 28 days to obtain high ductility concrete.

[0040] Example 2 A high-ductility concrete comprises the following raw materials in parts by weight: 675 parts of ordinary silicate cement, 680 parts of fly ash, 430 parts of modified ceramic powder, 450 parts of modified ceramic fine aggregate, 15 parts of polyethylene fiber, 350 parts of water, 5 parts of polycarboxylate superplasticizer powder, and 2 parts of hydroxypropyl methylcellulose ether.

[0041] Among them, the 28-day compressive strength of ordinary Portland cement is ≥42.5 MPa; The fly ash is grade I fly ash, with a particle size of 350 μm and a specific surface area ≥400 m². 2 / kg; The polyethylene fiber has a length of 12 mm, a diameter of 20 μm, an aspect ratio of ≥600, a breaking elongation of 3%, and a tensile strength of >3000 MPa; The ceramics used in the modified ceramic powder and modified ceramic fine aggregate both come from construction sites.

[0042] The preparation process of modified ceramic powder includes: The ceramics are cleaned, dried, crushed, and ball-milled to obtain ceramic powder. The ceramic powder is then calcined at 650℃ for 2 hours to obtain modified ceramic powder with a particle size of 0.5μm.

[0043] The preparation process of modified ceramic fine aggregate includes: After crushing the ceramics, coarse ceramic particles with a particle size ≤50mm are obtained. The coarse ceramic particles are washed, magnetically separated, dried, and ball-milled to obtain fine ceramic aggregate with a particle size ≤2.36mm. The fine ceramic aggregate is calcined at 1300℃ for 6 hours to obtain modified fine ceramic aggregate.

[0044] The above-mentioned method for preparing high-ductility concrete includes the following steps: S1. Mix modified ceramic fine aggregate, ordinary silicate cement, fly ash, and polycarboxylate superplasticizer powder at a speed of 120 r / min for 4 min to obtain dry material; S2. Add water and hydroxypropyl methylcellulose ether to the dry material and stir at 110 r / min for 6 min to obtain the wet material. S3. Add polyethylene fiber to the wet material and stir at 230 r / min for 3 min to obtain the material; S4. Add modified ceramic powder to the material and stir at 130 r / min for 3 min to obtain a slurry; S5. Vibrate the slurry for 4 minutes and cure it at 25°C for 28 days to obtain high ductility concrete.

[0045] Example 3 A high-ductility concrete comprises the following raw materials in parts by weight: 630 parts silicate cement, 700 parts fly ash, 485 parts modified ceramic powder, 485 parts modified ceramic fine aggregate, 15 parts polyethylene fiber, 400 parts water, 7.2 parts polycarboxylate superplasticizer powder, and 3 parts hydroxypropyl methylcellulose ether.

[0046] Among them, the 28-day compressive strength of silicate cement is ≥42.5 MPa; The fly ash is grade I fly ash, with a particle size of 300 μm and a specific surface area ≥400 m². 2 / kg; The polyethylene fiber has a length of 12 mm, a diameter of 20 μm, an aspect ratio of ≥600, a breaking elongation of 3%, and a tensile strength of >3000 MPa; The ceramics used in the modified ceramic powder and modified ceramic fine aggregate both come from ceramic factories.

[0047] The preparation process of modified ceramic powder includes: The ceramics are cleaned, dried, crushed, and ball-milled to obtain ceramic powder. The ceramic powder is then calcined at 600℃ for 4 hours to obtain modified ceramic powder with a particle size of 1μm.

[0048] The preparation process of modified ceramic fine aggregate includes: After crushing the ceramics, coarse ceramic particles with a particle size ≤50mm are obtained. The coarse ceramic particles are washed, magnetically separated, dried, and ball-milled to obtain fine ceramic aggregate with a particle size ≤2.36mm. The fine ceramic aggregate is calcined at 1250℃ for 2 hours to obtain modified fine ceramic aggregate.

[0049] The above-mentioned method for preparing high-ductility concrete includes the following steps: S1. Mix modified ceramic fine aggregate, silicate cement, fly ash, and polycarboxylate superplasticizer powder at a speed of 115 r / min for 4 min to obtain dry material; S2. Add water and hydroxypropyl methylcellulose ether to the dry material and stir at 100 r / min for 4 min to obtain the wet material. S3. Add polyethylene fiber to the wet material and stir at 180 r / min for 3 min to obtain the material; S4. Add modified ceramic powder to the material and stir at 130 r / min for 3 min to obtain a slurry; S5. Vibrate the slurry for 4 minutes and cure it at 25°C for 28 days to obtain high ductility concrete.

[0050] Comparative Example 1 A type of concrete comprising the following raw materials in parts by weight: 530 parts silicate cement, 630 parts fly ash, 820 parts quartz sand, 11 parts polyethylene fiber, 300 parts water, 4 parts polycarboxylate superplasticizer powder, and 1 part hydroxypropyl methylcellulose ether.

[0051] Among them, the 28-day compressive strength of silicate cement is ≥42.5 MPa; The fly ash is grade I fly ash, with a particle size of 400 μm and a specific surface area ≥ 400 m². 2 / kg; The particle size of the quartz sand is 80 mesh; The polyethylene fiber has a length of 12 mm, a diameter of 20 μm, an aspect ratio of ≥600, a breaking elongation of 3%, and a tensile strength of >3000 MPa; The above-mentioned method for preparing concrete includes the following steps: S1. Silicate cement, fly ash, and polycarboxylate superplasticizer powder are mixed at a speed of 135 r / min for 3 min to obtain dry material; S2. Add water and hydroxypropyl methylcellulose ether to the dry material and stir at 135 r / min for 5 min to obtain the wet material. S3. Add polyethylene fiber to the wet material and stir at 200 r / min for 4 min to obtain the material; S4. Add quartz sand to the material and stir at 135 r / min for 5 min to obtain slurry; S5. Vibrate the slurry for 4 minutes and cure it at 25°C for 28 days to obtain concrete.

[0052] Comparative Example 2 530 parts silicate cement, 630 parts fly ash, 420 parts modified ceramic powder, 400 parts quartz sand, 11 parts polyethylene fiber, 300 parts water, 4 parts polycarboxylate superplasticizer powder, and 1 part hydroxypropyl methylcellulose ether.

[0053] Among them, the 28-day compressive strength of silicate cement is ≥42.5 MPa; The fly ash is grade I fly ash, with a particle size of 400 μm and a specific surface area ≥ 400 m². 2 / kg; The particle size of the quartz sand is 80 mesh; The polyethylene fiber has a length of 12 mm, a diameter of 20 μm, an aspect ratio of ≥600, a breaking elongation of 3%, and a tensile strength of >3000 MPa; The preparation process of modified ceramic powder includes: The ceramics are cleaned, dried, crushed, and ball-milled to obtain ceramic powder. The ceramic powder is then calcined at 800℃ for 4 hours to obtain modified ceramic powder with a particle size of 1μm.

[0054] The above-mentioned method for preparing concrete includes the following steps: S1. Mix quartz sand, silicate cement, fly ash, and polycarboxylate superplasticizer powder at a speed of 135 r / min for 3 min to obtain dry material; S2. Add water and hydroxypropyl methylcellulose ether to the dry material and stir at 135 r / min for 5 min to obtain the wet material. S3. Add polyethylene fiber to the wet material and stir at 200 r / min for 4 min to obtain the material; S4. Add modified ceramic powder to the material and stir at 135 r / min for 5 min to obtain a slurry; S5. Vibrate the slurry for 4 minutes and cure it at 25°C for 28 days to obtain concrete.

[0055] Comparative Example 3 530 parts silicate cement, 630 parts fly ash, 400 parts modified ceramic fine aggregate, 11 parts polyethylene fiber, 300 parts water, 4 parts polycarboxylate superplasticizer powder, and 1 part hydroxypropyl methylcellulose ether.

[0056] Among them, the 28-day compressive strength of silicate cement is ≥42.5 MPa; The fly ash is grade I fly ash, with a particle size of 400 μm and a specific surface area ≥ 400 m². 2 / kg; The polyethylene fiber has a length of 12 mm, a diameter of 20 μm, an aspect ratio of ≥600, a breaking elongation of 3%, and a tensile strength of >3000 MPa; The preparation process of modified ceramic fine aggregate includes: After crushing the ceramics, coarse ceramic particles with a particle size ≤50mm are obtained. The coarse ceramic particles are washed, magnetically separated, dried, and ball-milled to obtain fine ceramic aggregate with a particle size ≤2.36mm. The fine ceramic aggregate is then calcined at 1100℃ to obtain modified fine ceramic aggregate.

[0057] The above-mentioned method for preparing concrete includes the following steps: S1. Mix modified ceramic fine aggregate, silicate cement, fly ash, and polycarboxylate superplasticizer powder at a speed of 135 r / min for 3 min to obtain dry material; S2. Add water and hydroxypropyl methylcellulose ether to the dry material and stir at 135 r / min for 5 min to obtain the wet material. S3. Add polyethylene fiber to the wet material and stir at 200 r / min for 4 min to obtain slurry; S4. Vibrate the slurry for 4 minutes and cure it at 25°C for 28 days to obtain concrete.

[0058] Performance testing: The high-ductility concrete prepared in Examples 1-3 and the concrete prepared in Comparative Examples 1-3 were subjected to performance tests, and the results are shown in Table 1.

[0059] Tensile strain capacity was tested using a computer-controlled universal testing machine, and crack width was recorded. Tensile strength was tested according to the People's Republic of China building materials industry standard JC205-92.

[0060] Table 1 Performance Test Results

[0061] As shown in Table 1, the high-ductility concrete provided by this invention exhibits good fracture toughness and significant strain hardening characteristics, demonstrating excellent steady-state cracking behavior and deformation capacity. The results of Comparative Example 1 show that replacing the modified ceramic powder and modified ceramic fine aggregate with quartz sand significantly reduces the tensile strain capacity. The results of Comparative Examples 2 and 3 show that without the addition of modified ceramic powder or modified ceramic fine aggregate, the tensile strength of the concrete significantly decreases, and it lacks tensile strain hardening capacity.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A high ductility concrete, characterized by, The raw materials include the following mass parts: cement 285-675 parts, fly ash 500-700 parts, modified ceramic powder 400-485 parts, modified ceramic fine aggregate 400-485 parts, polyethylene fiber 10-20 parts, water 300-450 parts, high efficiency water reducing agent 3-8 parts, thickening agent 1-5 parts.

2. The high ductility concrete according to claim 1, characterized in that, The cement includes ordinary Portland cement or Portland cement.

3. The high ductility concrete according to claim 1, wherein The particle size of the fly ash is 50-400 μm, and the specific surface area is ≥400 m 2 / kg.

4. The high ductility concrete according to claim 1, wherein The preparation process of the modified ceramic powder includes: crushing and ball milling the ceramic to obtain ceramic powder, calcining the ceramic powder at a temperature of 600-800 DEG C for 1-4h to obtain the modified ceramic powder; The particle size of the modified ceramic powder is 0.1-1um.

5. The high ductility concrete according to claim 1, wherein The particle size of the modified ceramic fine aggregate is less than or equal to 2.36mm, the pore size is 1-10um, and the porosity is 15%-25%; The preparation process of the modified ceramic fine aggregate includes: crushing and ball milling the ceramic to obtain ceramic fine aggregate, calcining the ceramic fine aggregate at a temperature of 1100-1300 DEG C for 2-6h to obtain the modified ceramic fine aggregate.

6. The high ductility concrete of claim 1, wherein The length of the polyethylene fiber is 12-36mm, the diameter is 20-40um, and the aspect ratio is greater than or equal to 600.

7. The high ductility concrete according to claim 1, wherein The high efficiency water reducing agent includes polycarboxylic acid water reducing agent, and the thickening agent includes cellulose ether.

8. A method of producing a high-ductility concrete according to any one of claims 1 to 7, characterized in that, The method includes the following steps: S1, mixing the modified ceramic fine aggregate, cement, fly ash and high efficiency water reducing agent to obtain dry materials; S2, adding water and thickening agent to the dry materials and stirring to obtain wet materials; S3, adding polyethylene fiber to the wet materials and stirring to obtain materials; S4, adding modified ceramic powder to the materials and stirring to obtain slurry; S5, shaping and curing the slurry to obtain high ductility concrete.

9. A method of producing a high ductility concrete according to claim 8, characterized in that, The rotating speed of the mixing in S1 is 100-135r / min, and the mixing time is 1-4min; The rotating speed of the stirring in S2 is 100-135r / min, and the stirring time is 1-6min; The rotating speed of the stirring in S3 is 180-230r / min, and the stirring time is 3-4min; The rotating speed of the stirring in S4 is 100-135r / min, and the stirring time is 3-5min.

10. The use of the high ductility concrete according to any one of claims 1-7 in the field of building materials.

Images