High-strength easy-to-construct concrete and preparation method thereof
By optimizing the raw material ratio and modifier composition of high-strength concrete, the problem of poor fluidity of high-strength concrete is solved, and high fluidity and easy construction are achieved, which is suitable for long-distance transportation.
Patent Information
- Application Number
- CN202510442830.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2025-07-04
AI Technical Summary
The small water-cement ratio of high-strength concrete leads to poor fluidity, and problems such as poor flow and difficult bubbles to be discharged during construction are prone to problems such as, especially when transported from a long distance.
The raw materials with specific ratios are used, including cement, fly ash, coarse and fine aggregate, water reducing agent and modifier. The modifier is composed of glycidyl methacrylate, fatty acid polyoxyethylene ester and silane modified polyether polyol. By optimizing the amount of these ingredients and pretreating fly ash, the microstructure and fluidity of the concrete are improved.
The flowability and construction performance of concrete are improved, making it suitable for long-distance transportation, reducing construction difficulty, and ensuring the smoothness and quality of the pouring process.
Smart Images
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Abstract
Description
Technical Field
[0001] This application relates to the technical field of concrete processing, and more specifically, to a high-strength and easy-to-construct concrete and a preparation method thereof. Background Art
[0002] High-strength concrete has relatively high compressive strength and tensile strength, usually 4 - 6 times higher than ordinary concrete. High-strength concrete is usually prepared by mixing water, cement, sand, stone raw materials, water reducing agent, fly ash, blast furnace slag powder, and silica fume, etc., and is mainly applied to fields such as high-rise buildings, long-span bridges, and water conservancy projects.
[0003] The water-cement ratio of high-strength concrete is relatively small compared to ordinary concrete. The main reason is that the larger the water-cement ratio, the smaller the bondability of the raw materials, the more pores in the concrete, and the lower its strength. Therefore, the smaller the water-cement ratio of high-strength concrete, the higher its strength. However, the smaller the water-cement ratio, the greater the viscosity of the concrete will be, the worse the fluidity during construction, and problems such as poor flow during pouring and difficulty in discharging air bubbles are likely to occur, especially during long-distance transportation. Summary of the Invention
[0004] In order to solve the problems of small water-cement ratio, poor fluidity, and poor processing performance of high-strength concrete, this application provides a high-strength and easy-to-construct concrete and a preparation method thereof.
[0005] In the first aspect, this application provides a high-strength and easy-to-construct concrete, adopting the following technical scheme: A high-strength and easy-to-construct concrete is prepared from raw materials including the following parts by weight: Cement 500 - 600 parts Fly ash 80 - 120 parts Coarse aggregate 1000 - 1100 parts Fine aggregate 600 - 700 parts Water reducing agent 10 - 15 parts Modifier 20 - 25 parts Water 140 - 160 parts The modifier is composed of glycidyl methacrylate, fatty acid polyoxyethylene ester, and silane-modified polyether polyol.
[0006] By adopting the above technical scheme, the prepared concrete has high strength, good fluidity, is easy to construct, is suitable for long-distance transportation, and is not prone to problems such as poor flow during pouring and difficulty in discharging air bubbles.
[0007] Cement, as a gelling material, forms a strong skeleton structure together with fly ash, coarse aggregate, and fine aggregate. The active effect of fly ash reacts with the hydration products of cement to generate compounds with gelling properties, filling the pores and increasing the density. The modifier changes the microstructure of concrete, adjusts the fluidity of concrete, enhances the internal bonding force, and thus improves the overall strength and fluidity. The water reducer and the modifier are used in combination to further improve the fluidity of concrete. At the same time, the addition of the modifier can improve the microstructure of concrete and the interaction between particles, making the concrete more uniform and stable during the pouring process, effectively reducing the generation and retention of air bubbles.
[0008] Among them, glycidyl methacrylate in the modifier helps to improve the fluidity of concrete, making the concrete flow more smoothly during mixing, transportation, and pouring, and reducing the construction difficulty; fatty acid polyoxyethylene ester can reduce the water consumption, and the pore structure formed during the hardening process of concrete is more dense, thus improving the density and strength of concrete; silane-modified polyether polyol helps to discharge air bubbles, reduce the pores and defects inside the concrete, and improve the density and strength of concrete; the three are jointly used to prepare the modifier, which further improves the fluidity and stability of concrete, making the concrete less likely to occur stratification, segregation, bleeding and other phenomena during long-distance transportation, and ensuring the quality and performance of concrete.
[0009] Preferably, the weight ratio of glycidyl methacrylate, fatty acid polyoxyethylene ester and siloxane-modified polyether polyol is (6 - 8):3:(5 - 9).
[0010] By adopting the above technical scheme, optimizing the dosages of glycidyl methacrylate, fatty acid polyoxyethylene ester and siloxane-modified polyether polyol enables the three to give full play to their roles and jointly improve the fluidity and construction performance of concrete. Preferably, the functionality of the siloxane-modified polyether polyol is 0.45 - 0.69, and the viscosity at 25°C is 11000 - 20000 mPa·s.
[0011] By adopting the above technical scheme, optimizing the siloxane-modified polyether polyol increases the fluidity of concrete, helps to discharge air bubbles, reduces the pores and defects inside the concrete, and improves the density and strength of concrete.
[0012] Preferably, the fly ash is pretreated through the following steps: By weight, 80 - 120 parts of fly ash, 5 - 10 parts of silane coupling agent and 80 - 90 parts of diluent are mixed, and under the action of a dispersion speed of 2000 - 3000 r / min, 40 - 50 parts of epoxy resin are added and mixed evenly, and then 4 - 8 parts of curing agent are added and stirred and mixed evenly to obtain pretreated fly ash.
[0013] The particle dispersibility and fluidity of the pretreated fly ash are improved, which helps to reduce the viscosity and internal friction of the concrete mixture, improve the fluidity and plasticity of the concrete, facilitate the pouring, vibration and compaction of the concrete, and improve the construction efficiency and quality.
[0014] Through the synergistic effect of fly ash, silane coupling agent and epoxy resin, the strength and fluidity of the concrete can be significantly improved. The silane coupling agent can improve the interfacial bonding force between fly ash and materials such as epoxy resin, making the two better compatible, thereby improving the workability and constructability of the concrete. At the same time, the silane coupling agent can improve the surface properties of fly ash particles, increase their adhesion to the cement matrix, improve the reactivity of fly ash in the concrete, and form a denser microstructure, thus improving the compressive strength and tensile strength of the concrete. The particle shape and surface properties of the pretreated fly ash are improved, resulting in an increase in the fluidity of the concrete mixture, which is conducive to the construction of the concrete.
[0015] Preferably, the silane coupling agent is at least one of aminoethyl aminopropyl triethoxysilane, N-n-butyl-3-aminopropyl trimethoxysilane, 3-aminopropyl methyldiethoxysilane, N-(2-aminoethyl)-3-aminopropyl dimethoxysilane, diethylamino methyl triethoxysilane, γ-aminopropyl triethoxysilane, γ-glycidoxypropyl trimethoxysilane, vinyl triethoxysilane and vinyl methyl dimethoxysilane.
[0016] By adopting the above technical solution, by optimizing the type of silane coupling agent, promoting the combination of the silane coupling agent and fly ash, it is beneficial to improve the dispersibility of fly ash, enabling the fly ash to be fully dispersed in the concrete system, and increasing the fluidity and strength of the concrete.
[0017] Preferably, the cement is one of Portland cement, slag Portland cement, pozzolanic Portland cement or composite Portland cement.
[0018] By adopting the above technical solution, optimizing the type of cement can improve the workability of the concrete, reduce the resistance during construction, make the concrete easier to mix, transport, pour and vibrate, and at the same time, improve the durability of the concrete.
[0019] Preferably, the water reducing agent is at least one of polycarboxylate water reducing agent, lignosulfonate water reducing agent, naphthalene-based superplasticizer or aliphatic superplasticizer.
[0020] By adopting the above technical solution, optimizing the type of water reducing agent can effectively control the water consumption of the concrete, while reducing the viscosity of the concrete, increasing the fluidity of the concrete, and improving the physical and mechanical properties such as the compressive strength and flexural strength of the concrete.
[0021] Preferably, each portion of the coarse aggregate is obtained by mixing coarse aggregate with an average particle size of 8 - 15 mm, coarse aggregate with an average particle size of 15 - 30 mm, and coarse aggregate with an average particle size of 30 - 50 mm in a weight ratio of 2:(4 - 6):(8 - 10).
[0022] By adopting the above technical solution, mixing coarse aggregates with different particle sizes can form a more compact particle packing, reduce the pores and voids inside the concrete, thereby improving the density and strength of the concrete. At the same time, by adjusting the proportion of coarse aggregates with different particle sizes, the fluidity of the concrete can be controlled, and the workability of the concrete can be improved.
[0023] Preferably, each portion of the fine aggregate is obtained by mixing fine aggregate with an average particle size of 0.08 - 2 mm and fine aggregate with an average particle size of 0.2 - 0.5 mm in a weight ratio of (4 - 8):3.
[0024] By adopting the above technical solution, mixing fine aggregates with different particle sizes can optimize the particle gradation, improve the density of the concrete, reduce the pores and defects inside the concrete, and contribute to improving the compressive strength and tensile strength of the concrete. At the same time, a reasonable fine aggregate gradation can improve the workability and fluidity of the concrete, make the concrete easier to construct, reduce the bleeding and segregation phenomena of the concrete mixture, and improve the uniformity and stability of the concrete.
[0025] In a second aspect, the present application provides a method for preparing a high-strength and easy-to-construct concrete, adopting the following technical solution: A method for preparing a high-strength and easy-to-construct concrete includes the following preparation steps: Mix cement, fly ash, coarse aggregate, fine aggregate, water reducing agent, modifier and water evenly to obtain high-strength and easy-to-construct concrete.
[0026] By adopting the above technical solution, various raw materials are fully mixed, further improving the uniformity of the concrete, which is beneficial to improving the fluidity and strength of the concrete, and reducing problems such as poor flow and difficult air bubble discharge during pouring.
[0027] In summary, the present application has the following beneficial effects: 1. High strength: By reasonably proportioning cement, fly ash, coarse and fine aggregates, and high-efficiency water reducing agent, etc., the concrete reaches a strength grade of C70 after hardening, meeting the strict strength requirements of structures such as high-rise buildings and long-span bridges.
[0028] 2. Good fluidity and easy to construct: The addition of the modifier significantly improves the fluidity of the concrete, making it easy to mix, pump and pour, reducing the construction difficulty and improving the construction efficiency. At the same time, good fluidity also helps the concrete to be evenly distributed in the formwork, reducing internal defects.
[0029] 3. Suitable for long-distance transportation: Due to the good fluidity of the concrete, it can be smoothly transported over long distances through pumping equipment, meeting the requirements for material transportation in modern construction. Detailed implementation method Example
[0030] The silane-modified polyether polyol was purchased from Dongguan Longzhiyuan Chemical Co., Ltd., with the brand of Dow and the model of VORASIL 602.
[0031] The fatty acid polyoxyethylene ester was purchased from Wuhan Jixin Yibang Biotechnology Co., Ltd., with the molecular formula of RCOO(CH2CH2O)nH.
[0032] The portland cement is the Conch brand ordinary portland 52.5 cement.
[0033] The fly ash is the Wangqiang brand, with the grade of Class F Grade 1, its fineness is 12%, the water demand is 95%, the 28-day activity is 75%, and the 60-day activity is 90%.
[0034] The polycarboxylate superplasticizer was purchased from Shenzhen Wushan New Materials Co., Ltd. The admixture has a solid content of 10.4%, a pH value of 5.6, and a density of 1.043 g / cm 3 .
[0035] The lignosulfonate superplasticizer is sodium lignosulfonate.
[0036] The naphthalene-based high-range water reducer was purchased from Jinan Shunyang Chemical Technology Co., Ltd., with the grade of industrial grade.
[0037] The slag Portland cement was purchased from Zhengzhou Zhengjin Building Materials Co., Ltd., and the cement fineness is 100 (%).
[0038] The pozzolanic Portland cement was purchased from Dongguan Runze Building Materials Co., Ltd., with the grade of first-class product.
[0039] Example 1 A high-strength and easy-to-construct concrete is prepared by the following method: Mix 500 Kg of cement (portland cement), 80 Kg of fly ash, 1000 Kg of coarse aggregate (rock), 600 Kg of fine aggregate (sand and gravel), 10 Kg of water reducer (polycarboxylate superplasticizer), 20 Kg of modifier, and 140 Kg of water evenly to obtain high-strength and easy-to-construct concrete.
[0040] The modifier is composed of glycidyl methacrylate, fatty acid polyoxyethylene ester, and silane-modified polyether polyol in a weight ratio of 6:3:5.
[0041] The average particle size of the coarse aggregate is 15 mm.
[0042] The average particle size of the fine aggregate is 0.08 mm.
[0043] Example 2-3 is different from Example 1 in that the types, dosages of some raw materials for preparing high-strength and easy-to-construct concrete and the experimental parameters are different. The specific differences are shown in Table 1: Table 1 Types, dosages of raw materials for preparing high-strength and easy-to-construct concrete in Examples 1-3 and the experimental parameters Example 4 A kind of high-strength and easy-to-construct concrete. The difference between this example and Example 1 is that the modifier is composed of glycidyl methacrylate, fatty acid polyoxyethylene ester and silane-modified polyether polyol in a weight ratio of 3:3:5.
[0044] Example 5 A kind of high-strength and easy-to-construct concrete. The difference between this example and Example 1 is that the modifier is composed of glycidyl methacrylate, fatty acid polyoxyethylene ester and silane-modified polyether polyol in a weight ratio of 6:3:3.
[0045] Example 6 A kind of high-strength and easy-to-construct concrete. The difference between this example and Example 1 is that the modifier is composed of glycidyl methacrylate, fatty acid polyoxyethylene ester and silane-modified polyether polyol in a weight ratio of 6:6:3.
[0046] Example 7 A kind of high-strength and easy-to-construct concrete. The difference between this example and Example 1 is that the fly ash is pretreated through the following steps: Mix 80 Kg of fly ash, 5 Kg of silane coupling agent (aminoethylaminopropyltriethoxysilane) and 80 Kg of diluent (alkyl glycidyl ether). Under the action of a dispersion speed of 2000 r / min, add 40 Kg of epoxy resin and mix evenly, then add 4 Kg of curing agent (ethylenediamine), and stir and mix evenly to obtain pretreated fly ash.
[0047] The epoxy resin is bisphenol A type liquid epoxy resin, purchased from Nantong Xingchen Synthetic Materials Co., Ltd., with the model of WSR6101 (E-44).
[0048] Examples 8-9 are different from Example 7 in that the types, dosages of some raw materials for preparing pretreated fly ash and the experimental parameters are different. The specific differences are shown in Table 2: Table 2 Types, dosages of raw materials for preparing pretreated fly ash in Examples 8-9 and the experimental parameters Example 10 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 1 is that the coarse aggregate is obtained by mixing coarse aggregates with an average particle size of 8 mm, coarse aggregates with an average particle size of 15 mm, and coarse aggregates with an average particle size of 30 mm in a weight ratio of 2:4:8.
[0049] Embodiment 11 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 7 is that the coarse aggregate is obtained by mixing coarse aggregates with an average particle size of 15 mm, coarse aggregates with an average particle size of 30 mm, and coarse aggregates with an average particle size of 50 mm in a weight ratio of 2:6:10.
[0050] Embodiment 12 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 1 is that the fine aggregate is obtained by mixing fine aggregates with an average particle size of 0.08 mm and fine aggregates with an average particle size of 0.2 mm in a weight ratio of 4:3.
[0051] Embodiment 13 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 7 is that the fine aggregate is obtained by mixing fine aggregates with an average particle size of 2 mm and fine aggregates with an average particle size of 0.5 mm in a weight ratio of 8:3.
[0052] Embodiment 14 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 11 is that the fine aggregate is obtained by mixing fine aggregates with an average particle size of 2 mm and fine aggregates with an average particle size of 0.5 mm in a weight ratio of 8:3.
[0053] Embodiment 15 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 10 is that the coarse aggregate is obtained by mixing coarse aggregates with an average particle size of 15 mm and coarse aggregates with an average particle size of 30 mm in a weight ratio of 6:8.
[0054] Embodiment 16 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 10 is that the coarse aggregate is obtained by mixing coarse aggregates with an average particle size of 8 mm and coarse aggregates with an average particle size of 30 mm in a weight ratio of 1:12.
[0055] Embodiment 17 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 10 is that the coarse aggregate is obtained by mixing coarse aggregates with an average particle size of 8 mm and coarse aggregates with an average particle size of 15 mm in a weight ratio of 6:8.
[0056] Comparative Example Comparative Example 1 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 1 lies in that ethylene glycol diglycidyl ether is used instead of glycidyl methacrylate.
[0057] Comparative Example 2 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 1 lies in that polyethylene glycol fatty acid ester is used instead of polyoxyethylene methyl fatty acid ester.
[0058] The polyethylene glycol fatty acid ester was purchased from Hai'an Petrochemical Factory in Jiangsu Province, and the model is PEG600MO.
[0059] Comparative Example 3 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 1 lies in that polyether polyol is used instead of silane-modified polyether polyol.
[0060] The polyether polyol was purchased from Guangzhou Qixu Chemical Co., Ltd., and the model is MN-700.
[0061] Comparative Example 4 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 1 lies in that glycidyl methacrylate is used instead of the modifier.
[0062] Comparative Example 5 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 1 lies in that polyoxyethylene methyl fatty acid ester is used instead of the modifier.
[0063] Comparative Example 6 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 1 lies in that silane-modified polyether polyol is used instead of the modifier.
[0064] Comparative Example 7 A high-strength and easy-to-construct concrete. The difference between this embodiment and Embodiment 1 lies in that water is used instead of the modifier.
[0065] Performance detection test The high-strength and easy-to-construct concrete prepared in Examples 1-17 and Comparative Examples 1-7 was subjected to compressive strength test and fluidity test.
[0066] Detection method / Test method Compressive strength: It was detected in accordance with the "Standard for Test Methods of Physical and Mechanical Properties of Concrete" GB / T50081-2019.
[0067] Fluidity: In accordance with the provisions of GB / T 50080-2002 "Test Methods for Properties of Ordinary Concrete Mixtures", the fluidity of the concrete was tested. The larger the value of the fluidity, the better the fluidity of the concrete. The experimental data are shown in Table 3: Table 3 Experimental data of Examples 1-17 and Comparative Examples 1-7 Comparing Example 1 with Comparative Examples 1-7, in the compressive strength test, the compressive strength of Example 1 at 7 days and 28 days is higher than that of Comparative Examples 1-7, and the change rate of compressive strength from 7 days to 28 days in Comparative Examples 1-7 is less than that of Example 1; in the fluidity test, the initial fluidity and the fluidity after 1 hour in Example 1 are both greater than those of Comparative Examples 1-7, and the change in the initial fluidity and the fluidity after 1 hour in Comparative Examples 1-7 is much greater than that of Example 1, indicating that the concrete prepared by the formula in this application has the advantages of both high strength and good fluidity and is easy to construct.
[0068] Comparing Example 1 with Examples 4-6, in the compressive strength test, the compressive strength of Example 1 at 7 days and 28 days is higher than that of Examples 4-6; in the fluidity test, the initial fluidity and the fluidity after 1 hour in Example 1 are both greater than those of Examples 4-6, and the change in the initial fluidity and the fluidity after 1 hour in Examples 4-6 is much greater than that of Example 1, indicating that by optimizing the dosages of glycidyl methacrylate, fatty acid polyoxyethylene ester and silane-modified polyether polyol, the compressive strength and fluidity of the concrete can be improved.
[0069] Comparing Example 1 with Examples 7-9, in the compressive strength test, the compressive strength of Example 1 at 7 days and 28 days is less than that of Examples 7-9, and the change rate of compressive strength from 7 days to 28 days in Examples 7-9 is greater than that of Example 1; in the fluidity test, the initial fluidity and the fluidity after 1 hour in Example 1 are both less than those of Examples 7-9, and the change in the initial fluidity and the fluidity after 1 hour in Examples 7-9 is much less than that of Example 1, indicating that by pretreating fly ash by the method of this application, the compressive strength and fluidity of the concrete can be effectively improved.
[0070] Comparing Example 1 with Example 10, in the compressive strength test, the compressive strength of Example 1 at 7 days and 28 days is less than that of Example 10, and the change rate of compressive strength from 7 days to 28 days in Example 10 is greater than that of Example 1; in the fluidity test, the initial fluidity and the fluidity after 1 hour in Example 1 are both less than those of Example 10, and the change in the initial fluidity and the fluidity after 1 hour in Example 10 is less than that of Example 1; Comparing Example 7 with Example 11, in the compressive strength test, the compressive strengths of Example 7 at 7 days and 28 days are both less than those of Example 11, and the change rate of the compressive strength from 7 days to 28 days in Example 11 is greater than that in Example 7; in the fluidity test, the initial fluidity and the fluidity after 1 hour in Example 7 are both less than those in Example 11, and the change in the initial fluidity and the fluidity after 1 hour in Example 11 is less than that in Example 7. Comparing Example 10 with Examples 15 - 17, in the compressive strength test, the compressive strengths of Examples 15 - 17 at 7 days and 28 days are both less than those of Example 10, and the change rate of the compressive strength from 7 days to 28 days in Example 10 is greater than that in Examples 15 - 17; in the fluidity test, the initial fluidity and the fluidity after 1 hour in Examples 15 - 17 are both less than those in Example 10, and the change in the initial fluidity and the fluidity after 1 hour in Examples 15 - 17 is less than that in Example 10. From Examples 1 and 10, Examples 7 and 10, Examples 10 and 15 - 17, it shows that by optimizing the composition and average particle size of coarse aggregate, it is beneficial to improve the compressive strength and fluidity of concrete.
[0071] Comparing Example 1 with Example 12, in the compressive strength test, the compressive strengths of Example 1 at 7 days and 28 days are both less than those of Example 12, and the change rate of the compressive strength from 7 days to 28 days in Example 12 is greater than that in Example 1; in the fluidity test, the initial fluidity and the fluidity after 1 hour in Example 1 are both less than those in Example 12, and the change in the initial fluidity and the fluidity after 1 hour in Example 12 is less than that in Example 1. Comparing Example 7 with Example 13, in the compressive strength test, the compressive strengths of Example 7 at 7 days and 28 days are both less than those of Example 13, and the change rate of the compressive strength from 7 days to 28 days in Example 13 is greater than that in Example 7; in the fluidity test, the initial fluidity and the fluidity after 1 hour in Example 7 are both less than those in Example 13, and the change in the initial fluidity and the fluidity after 1 hour in Example 13 is less than that in Example 7. Comparing Example 10 with Example 14, in the compressive strength test, the compressive strengths of Example 10 at 7 days and 28 days are both less than those of Example 14, and the change rate of the compressive strength from 7 days to 28 days in Example 14 is greater than that in Example 10; in the fluidity test, the initial fluidity and the fluidity after 1 hour in Example 10 are both less than those in Example 14, and the change in the initial fluidity and the fluidity after 1 hour in Example 10 is less than that in Example 14. From Examples 1 and 12, Examples 7 and 13, Examples 10 and 14, it shows that by optimizing the composition and average particle size of fine aggregate, it is beneficial to improve the compressive strength and fluidity of concrete.
[0072] This specific embodiment is only an interpretation of the present application and does not limit the present application. After reading this specification, those skilled in the art can make modifications to this embodiment that do not contribute creatively as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.
Claims
1. A high-strength and easy-to-construct concrete, characterized in that, Prepared from raw materials including the following parts by weight: 500 - 600 parts of cement 80 - 120 parts of fly ash 1000 - 1100 parts of coarse aggregate 600 - 700 parts of fine aggregate 10 - 15 parts of water reducing agent 20 - 25 parts of modifier 140 - 160 parts of water The modifier is composed of glycidyl methacrylate, fatty acid polyoxyethylene ester and silane - modified polyether polyol.
2. The high-strength and easy-to-construct concrete according to claim 1, wherein: The weight - part ratio of the glycidyl methacrylate, the fatty acid polyoxyethylene ester and the silane - modified polyether polyol is (6 - 8):3:(5 - 9).
3. A high-strength and easy-to-construct concrete according to claim 2, characterized in that: The functionality of the silane - modified polyether polyol is 0.45 - 0.69, and its viscosity at 25°C is 11000 - 20000 mPa·s.
4. A high-strength and easy-to-construct concrete according to claim 1, characterized in that, The fly ash is pretreated through the following steps: By weight, 80 - 120 parts of fly ash, 5 - 10 parts of silane coupling agent and 80 - 90 parts of diluent are mixed. Under the action of a dispersion speed of 2000 - 3000 r / min, 40 - 50 parts of epoxy resin are added and mixed evenly, and then 4 - 8 parts of curing agent are added and stirred and mixed evenly to obtain pretreated fly ash.
5. The high-strength and easy-to-construct concrete according to claim 4, wherein: The silane coupling agent is at least one of aminoethyl aminopropyl triethoxysilane, N - n - butyl - 3 - aminopropyl trimethoxysilane, 3 - aminopropyl methyl diethoxysilane, N-(2 - aminoethyl)-3 - aminopropyl dimethoxysilane, diethylamino methyl triethoxysilane, γ - aminopropyl triethoxysilane, γ - glycidyletheroxypropyl trimethoxysilane, vinyl triethoxysilane and vinyl methyl dimethoxysilane.
6. A high-strength and easy-to-construct concrete according to claim 1, wherein: The cement is one of portland cement, slag portland cement, pozzolanic portland cement or composite portland cement.
7. A high-strength and easy-to-construct concrete according to claim 1, characterized in that: The water reducing agent is at least one of polycarboxylate water reducing agent, lignosulfonate water reducing agent, naphthalene - based high - efficiency water reducing agent or aliphatic high - efficiency water reducing agent.
8. A high-strength and easy-to-construct concrete according to claim 1, characterized in that: Each part of the coarse aggregate is obtained by mixing coarse aggregate with an average particle size of 8 - 15 mm, coarse aggregate with an average particle size of 15 - 30 mm and coarse aggregate with an average particle size of 30 - 50 mm according to a weight - part ratio of 2:(4 - 6):(8 - 10).
9. A high-strength and easy-to-construct concrete according to claim 1, characterized in that: Each part of the fine aggregate is obtained by mixing fine aggregate with an average particle size of 0.08 - 2 mm and fine aggregate with an average particle size of 0.2 - 0.5 mm according to a weight ratio of (4 - 8):
3.
10. A method for preparing the high-strength and easy-to-construct concrete according to any one of claims 1-9, characterized in that, Including the following preparation steps: Mix the cement, fly ash, coarse aggregate, fine aggregate, water reducing agent, modifier and water evenly to obtain high - strength and easy - to - construct concrete.