High-water-permeability concrete composition and preparation method thereof
The use of modified brown corundum micro-powder treated with a specific chemical mixture addresses the strength deficiency in transparent concrete, achieving high strength and permeability through improved structural integrity.
Patent Information
- Application Number
- CN202510353655.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-07-15
AI Technical Summary
The strength of existing permeable concrete is insufficient, making it difficult to meet the needs of high-strength use, and the improvement effect of existing additives is limited.
The modified brown corundum micro powder was modified by alkalizing and then modified by a modified solution made of tert-butyl aminoethyl methacrylate, isobutyl triethoxysilane, and hydrogenated tallow amine polyoxyethylene ether. Combined with polycarboxylic acid water reducer and potassium formate, a highly permeable concrete composition was prepared.
It significantly improves the strength of permeable concrete while maintaining high water permeability to meet various high-strength usage needs.
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Abstract
Description
Technical Field
[0001] The present invention relates to the field of concrete materials, and particularly to a highly permeable concrete composition and a preparation method thereof. Background Art
[0002] Permeable concrete is a concrete that only adds coarse aggregate. Since no fine aggregate is added, a large number of voids are formed inside the concrete, so that the concrete has strong water permeability.
[0003] However, in order to have high water permeability, the density of the concrete will be low. Although the quality of the concrete is reduced, it will also cause a significant decrease in the strength of the concrete. In the prior art, additives such as concrete strengthening agents are usually added to improve the strength of the permeable concrete. However, the strength of the existing permeable concrete is still not high and it is difficult to meet the increasingly high usage requirements. Therefore, there is still room for improvement. Summary of the Invention
[0004] In order to further improve the strength of permeable concrete, the present application provides a highly permeable concrete composition and a preparation method thereof.
[0005] In a first aspect, the present application provides a highly permeable concrete composition, adopting the following technical solution: A highly permeable concrete composition, comprising the following components in parts by mass: Water 100 parts; Cement 310 - 320 parts; Fly ash 33 - 37 parts; Coarse aggregate 1180 - 1200 parts; Modified brown fused alumina micropowder 10 - 12 parts; Additive 5.8 - 6.2 parts; The modification method of the modified brown fused alumina micropowder is as follows: Step 1), soaking the brown fused alumina micropowder in a strong alkali solution for alkali modification, filtering and washing to obtain alkali-modified brown fused alumina micropowder; Step 2), soaking the alkali-modified brown fused alumina micropowder in a modification solution for modification, filtering and drying to obtain modified brown fused alumina micropowder; The modification solution is a compound of tert-butylaminoethyl methacrylate, isobutyltriethoxysilane, and hydrogenated tallow amine polyoxyethylene ether.
[0006] By adopting the above technical solution, the brown fused alumina micropowder is modified by alkali modification and then by a modification solution compounded with tert-butylaminoethyl methacrylate, isobutyltriethoxysilane, and hydrogenated tallow amine polyoxyethylene ether. The obtained modified brown fused alumina micropowder can play a very significant strengthening effect on the permeable concrete, enabling the permeable concrete to have high water permeability while having high strength, and being able to better meet various high-strength usage requirements.
[0007] Preferably, in the modification liquid, the mass ratio of tert-butylaminoethyl methacrylate, isobutyltriethoxysilane, and hydrogenated tallow amine polyoxyethylene ether is 7-9:4-6:3-5.
[0008] By adopting the above technical solution, by specifically selecting the mass ratio of tert-butylaminoethyl methacrylate, isobutyltriethoxysilane, and hydrogenated tallow amine polyoxyethylene ether, the modification effect is better, and the effect of reinforcing concrete with modified brown fused alumina micropowder is more significant.
[0009] Preferably, the strong alkali solution is a sodium hydroxide solution, and the concentration of the sodium hydroxide solution is 40-50%.
[0010] By adopting the above technical solution, by specifically selecting the concentration of the sodium hydroxide solution to be 40-50%, the alkalized brown fused alumina micropowder can be better modified in the modification liquid, the modification effect of the brown fused alumina micropowder is better, and the reinforcing effect of the prepared modified brown fused alumina micropowder on concrete is better.
[0011] Preferably, in step 1), the brown fused alumina micropowder is soaked in the strong alkali solution for 50-70 min.
[0012] By adopting the above technical solution, by soaking in the strong alkali solution for 50-70 min, the alkalization effect is better, and at the same time, over-alkalization is avoided, thus affecting the effect of reinforcing concrete.
[0013] Preferably, in step 2), the alkalized brown fused alumina micropowder is soaked in the modification liquid at a constant temperature of 55-60 °C and soaked for modification for 3-4 h.
[0014] By adopting the above technical solution, by specifically selecting a constant temperature of 55-60 °C and soaking for modification for 3-4 h, the modification effect of the modification liquid is better, and the reinforcing effect of the obtained modified brown fused alumina micropowder on concrete is more significant.
[0015] Preferably, the auxiliary agent is a compound of polycarboxylate water reducer and potassium formate.
[0016] By adopting the above technical solution, by adding polycarboxylate water reducer and potassium formate, the construction process difficulty of high-permeability concrete is lower and it has higher economic value.
[0017] Preferably, the mass ratio of polycarboxylate water reducer to potassium formate is 2.9-3.1:2.9-3.1.
[0018] By adopting the above technical solution, by specifically selecting the mass ratio of polycarboxylate water reducer to potassium formate, the effects of coagulation and early strength are just right, and the quality of concrete is higher.
[0019] Second aspect, the present application provides a preparation method of a highly permeable concrete composition, adopting the following technical solution: A preparation method of the above-mentioned highly permeable concrete composition, comprising the following steps: Step 01), mixing cement, fly ash, coarse aggregate, modified brown fused alumina micropowder, and an auxiliary agent evenly to obtain a premix; Step 02), adding water to the premix and stirring evenly to obtain a highly permeable concrete composition.
[0020] By adopting the above technical solution, the highly permeable concrete composition prepared can maintain high water permeability after curing, and at the same time has high strength, well meeting the high-strength use requirements.
[0021] In summary, the present application has the following beneficial effects: 1. Since the brown fused alumina micropowder in the present application is modified by alkalization and then modified by a modifier composed of a compound of tert-butylaminoethyl methacrylate, isobutyltriethoxysilane, and hydrogenated tallow amine polyoxyethylene ether, the obtained modified brown fused alumina micropowder can play a very significant strengthening effect on the permeable concrete, enabling the permeable concrete to maintain high water permeability while having high strength, and being able to better meet various high-strength use requirements.
[0022] 2. In the present application, by preferably selecting the mass ratio of tert-butylaminoethyl methacrylate, isobutyltriethoxysilane, and hydrogenated tallow amine polyoxyethylene ether, the modification effect is better, and the effect of the modified brown fused alumina micropowder in strengthening the concrete is more significant. Specific Embodiments
[0023] The following further elaborates on the present application in conjunction with examples.
[0024] Example 1 A highly permeable concrete composition, comprising the following components in parts by mass: Water, cement, fly ash, coarse aggregate, modified brown fused alumina micropowder, and an auxiliary agent.
[0025] The cement is ordinary Portland cement, purchased from Runfeng Cement, standard: P.O 42.5R.
[0026] The fly ash is purchased from LingShou County ShuangShi Mineral Products Processing Factory, secondary fly ash.
[0027] The coarse aggregate is basalt gravel, sourced from the market, with a particle size of 20 - 25 mm.
[0028] The auxiliary agent is a compound of polycarboxylate superplasticizer and potassium formate.
[0029] The polycarboxylate superplasticizer is purchased from Shandong Tenghua New Materials Co., Ltd.
[0030] Potassium formate was purchased from Jinan Yuanlian Chemical Co., Ltd.
[0031] The modified brown fused alumina micropowder was self-made, and the modification method of the brown fused alumina micropowder was as follows: Step 1), Dissolve sodium hydroxide in water to prepare a sodium hydroxide solution with a concentration of 40%. Immerse 30 kg of brown fused alumina micropowder in 30 kg of sodium hydroxide solution for 50 min for alkalization modification. Then filter out the filter residue through a filter cloth, and rinse the filter residue with clear water until the pH value of the rinsing water ≤ 8. Then dry the filter residue at 110 °C to obtain alkalized brown fused alumina micropowder.
[0032] Step 2), Mix 7 kg of tert-butylaminoethyl methacrylate, 4 kg of isobutyltriethoxysilane, and 3 kg of hydrogenated tallow amine polyoxyethylene ether evenly to prepare a modification liquid. Immerse 14 kg of alkalized brown fused alumina micropowder in 14 kg of the modification liquid at a constant temperature of 55 °C for 3 h for immersion modification. Then filter out the filter residue through a filter cloth, and then air-dry the filter residue naturally to obtain modified brown fused alumina micropowder.
[0033] The brown fused alumina micropowder was purchased from Henan Youji Environmental Protection Technology Co., Ltd., 240 mesh.
[0034] Sodium hydroxide was from the market, CAS No.: 1310-73-2.
[0035] Tert-butylaminoethyl methacrylate was purchased from Changzhou Aozun Composite New Materials Co., Ltd.
[0036] Isobutyltriethoxysilane was purchased from Qufu Yishun Chemical Co., Ltd.
[0037] Hydrogenated tallow amine polyoxyethylene ether was purchased from Jiangsu Haian Petrochemical Factory.
[0038] The preparation method of the high-permeability concrete composition was as follows: Step 01), Put 310 kg of cement, 33 kg of fly ash, 1180 kg of coarse aggregate, 10 kg of modified brown fused alumina micropowder, 2.9 kg of polycarboxylate water reducer, and 2.9 kg of potassium formate into a mixer, with a rotation speed of 60 r / min, and stir for 5 min to mix evenly to obtain a premix.
[0039] Step 02), Add 100 kg of water to the premix, with a rotation speed of 60 r / min, and stir for 5 min to stir evenly to obtain a high-permeability concrete composition.
[0040] Example 2 A high-permeability concrete composition, comprising the following components in parts by mass: Water, cement, fly ash, coarse aggregate, modified brown fused alumina micropowder, additives.
[0041] The cement is ordinary Portland cement, purchased from Runfeng Cement, standard: P.O 42.5R.
[0042] The fly ash is purchased from Lingshou County Shuangshi Mineral Products Processing Factory, Class II fly ash.
[0043] The coarse aggregate is basalt gravel, sourced from the market, particle size 20 - 25mm.
[0044] The additive is a compound of polycarboxylate water - reducing agent and potassium formate.
[0045] The polycarboxylate water - reducing agent is purchased from Shandong Tenghua New Materials Co., Ltd.
[0046] The potassium formate is purchased from Jinan Yuanlian Chemical Co., Ltd.
[0047] The modified brown fused alumina micro - powder is self - made, and the modification method of the brown fused alumina micro - powder is as follows: Step 1), Dissolve sodium hydroxide in water to prepare a sodium hydroxide solution with a concentration of 45%. Immerse 30 kg of brown fused alumina micro - powder in 30 kg of sodium hydroxide solution for 60 min for alkalization modification. Then filter out the filter residue through a filter cloth, and rinse the filter residue with clear water until the pH value of the rinsing water ≤ 8. Then dry the filter residue at 110 °C to obtain alkalized brown fused alumina micro - powder.
[0048] Step 2), Mix 8 kg of tert - butylaminoethyl methacrylate, 5 kg of isobutyltriethoxysilane, and 4 kg of hydrogenated tallow amine polyoxyethylene ether evenly to prepare a modification liquid. Immerse 17 kg of alkalized brown fused alumina micro - powder in 17 kg of modification liquid at a constant temperature of 58 °C for 3.5 h for immersion modification. Then filter out the filter residue through a filter cloth, and then air - dry the filter residue naturally to obtain modified brown fused alumina micro - powder.
[0049] The brown fused alumina micro - powder is purchased from Henan Youji Environmental Protection Technology Co., Ltd., 240 mesh.
[0050] The sodium hydroxide is sourced from the market, CAS number: 1310 - 73 - 2.
[0051] The tert - butylaminoethyl methacrylate is purchased from Changzhou Aozun Composite New Materials Co., Ltd.
[0052] The isobutyltriethoxysilane is purchased from Qufu Yishun Chemical Co., Ltd.
[0053] The hydrogenated tallow amine polyoxyethylene ether is purchased from Jiangsu Haian Petrochemical Factory.
[0054] The preparation method of the high - permeability concrete composition is as follows: Step 01), put 315 kg of cement, 35 kg of fly ash, 1190 kg of coarse aggregate, 11 kg of modified brown fused alumina micropowder, 3 kg of polycarboxylate water reducer, and 3 kg of potassium formate into a mixer, rotate at 60 r / min, stir for 5 min, and mix evenly to obtain a premix.
[0055] Step 02), add 100 kg of water to the premix, rotate at 60 r / min, stir for 5 min, and stir evenly to obtain a high-permeability concrete composition.
[0056] Example 3 A high-permeability concrete composition, comprising the following components in parts by mass: Water, cement, fly ash, coarse aggregate, modified brown fused alumina micropowder, additives.
[0057] The cement is ordinary Portland cement, purchased from Runfeng Cement, standard: P.O 42.5R.
[0058] The fly ash is purchased from Lingshou County Shuangshi Mineral Products Processing Factory, secondary fly ash.
[0059] The coarse aggregate is basalt gravel, sourced from the market, with a particle size of 20-25 mm.
[0060] The additives are a compound of polycarboxylate water reducer and potassium formate.
[0061] The polycarboxylate water reducer is purchased from Shandong Tenghua New Materials Co., Ltd.
[0062] The potassium formate is purchased from Jinan Yuanlian Chemical Co., Ltd.
[0063] The modified brown fused alumina micropowder is self-made, and the modification method of the brown fused alumina micropowder is as follows: Step 1), dissolve sodium hydroxide in water to prepare a sodium hydroxide solution with a concentration of 50%, soak 30 kg of brown fused alumina micropowder in 30 kg of sodium hydroxide solution for 70 min for alkalization modification, then filter out the filter residue through a filter cloth, wash the filter residue with clear water until the pH value of the washing water ≤ 8, and then dry the filter residue at 110 °C to obtain alkalized brown fused alumina micropowder.
[0064] Step 2), mix 9 kg of tert-butylaminoethyl methacrylate, 6 kg of isobutyltriethoxysilane, and 5 kg of hydrogenated tallow amine polyoxyethylene ether evenly to prepare a modification liquid, soak 20 kg of alkalized brown fused alumina micropowder in 20 kg of modification liquid at a constant temperature of 60 °C for 4 h for immersion modification, then filter out the filter residue through a filter cloth, and then air-dry the filter residue naturally to obtain modified brown fused alumina micropowder.
[0065] The brown fused alumina micropowder is purchased from Henan Youji Environmental Protection Technology Co., Ltd., 240 mesh.
[0066] Sodium hydroxide is commercially available, CAS No.: 1310-73-2.
[0067] Tert-butylaminoethyl methacrylate was purchased from Changzhou Aozun Composite New Materials Co., Ltd.
[0068] Isobutyltriethoxysilane was purchased from Qufu Yishun Chemical Co., Ltd.
[0069] Hydrogenated tallow amine polyoxyethylene ether was purchased from Jiangsu Haian Petrochemical Factory.
[0070] The preparation method of the high water permeability concrete composition is as follows: Step 01), put 320 kg of cement, 37 kg of fly ash, 1200 kg of coarse aggregate, 12 kg of modified brown fused alumina micropowder, 3.1 kg of polycarboxylate superplasticizer, and 3.1 kg of potassium formate into a mixer, rotate at 60 r / min, and stir for 5 min to mix evenly to obtain a premix.
[0071] Step 02), add 100 kg of water to the premix, rotate at 60 r / min, and stir for 5 min to stir evenly to obtain the high water permeability concrete composition.
[0072] Comparative Example 1 A high water permeability concrete composition, comprising the following components in parts by mass: Water, cement, fly ash, coarse aggregate, modified brown fused alumina micropowder, additives.
[0073] The cement is ordinary Portland cement, purchased from Runfeng Cement, standard: P.O 42.5R.
[0074] The fly ash was purchased from Lingshou County Shuangshi Mineral Products Processing Factory, secondary fly ash.
[0075] The coarse aggregate is basalt gravel, commercially available, with a particle size of 20-25 mm.
[0076] The additive is a compound of polycarboxylate superplasticizer and potassium formate.
[0077] The polycarboxylate superplasticizer was purchased from Shandong Tenghua New Materials Co., Ltd.
[0078] The potassium formate was purchased from Jinan Yuanlian Chemical Co., Ltd.
[0079] The modified brown fused alumina micropowder is self-made, and the modification method of the brown fused alumina micropowder is as follows: Step 1), Dissolve sodium hydroxide in water to prepare a sodium hydroxide solution with a concentration of 45%. Immerse 30 kg of brown fused alumina micropowder in 30 kg of sodium hydroxide solution for 60 minutes for alkaline modification. Then filter through a filter cloth to filter out the filter residue. The filter residue is rinsed with clean water until the pH value of the rinsing water is ≤ 8, and then the filter residue is dried at 110 °C to obtain alkaline brown fused alumina micropowder.
[0080] Step 2), Mix 8 kg of bisphenol A diallyl ether, 5 kg of isobutyltriethoxysilane, and 4 kg of hydrogenated tallow amine polyoxyethylene ether evenly to prepare a modified liquid. Immerse 17 kg of alkaline brown fused alumina micropowder in 17 kg of modified liquid at a constant temperature of 58 °C for 3.5 hours for immersion modification. Then filter through a filter cloth to filter out the filter residue, and then the filter residue is naturally air-dried to obtain modified brown fused alumina micropowder.
[0081] The brown fused alumina micropowder is purchased from Henan Youji Environmental Protection Technology Co., Ltd., 240 mesh.
[0082] The sodium hydroxide is from the market, CAS No.: 1310 - 73 - 2.
[0083] The bisphenol A diallyl ether is purchased from Qingdao Baichen New Material Technology Co., Ltd.
[0084] The isobutyltriethoxysilane is purchased from Qufu Yishun Chemical Co., Ltd.
[0085] The hydrogenated tallow amine polyoxyethylene ether is purchased from Jiangsu Haian Petrochemical Factory.
[0086] The preparation method of the high water permeability concrete composition is as follows: Step 01), Put 315 kg of cement, 35 kg of fly ash, 1190 kg of coarse aggregate, 11 kg of modified brown fused alumina micropowder, 3 kg of polycarboxylate water reducer, and 3 kg of potassium formate into a mixer, rotate at 60 r / min, and stir for 5 minutes to mix evenly to obtain a premix.
[0087] Step 02), Add 100 kg of water to the premix, rotate at 60 r / min, and stir for 5 minutes to stir evenly to obtain the high water permeability concrete composition.
[0088] Comparative Example 2 A high water permeability concrete composition includes the following components in parts by mass: Water, cement, fly ash, coarse aggregate, modified brown fused alumina micropowder, additives.
[0089] The cement is ordinary Portland cement, purchased from Runfeng Cement, standard: P.O 42.5R.
[0090] The fly ash is purchased from Lingshou County Shuangshi Mineral Products Processing Factory, secondary fly ash.
[0091] The coarse aggregate is basalt gravel, sourced commercially, with a particle size of 20 - 25 mm.
[0092] The additives are a compound of polycarboxylate superplasticizer and potassium formate.
[0093] The polycarboxylate superplasticizer is purchased from Shandong Tenghua New Materials Co., Ltd.
[0094] The potassium formate is purchased from Jinan Yuanlian Chemical Co., Ltd.
[0095] The modified brown fused alumina micro - powder is self - made, and the modification method of the brown fused alumina micro - powder is as follows: Step 1), Dissolve sodium hydroxide in water to prepare a sodium hydroxide solution with a concentration of 45%. Immerse 30 kg of brown fused alumina micro - powder in 30 kg of the sodium hydroxide solution for 60 min for alkalization modification. Then filter out the filter residue through a filter cloth, rinse the filter residue with clear water until the pH value of the rinsing water ≤ 8, and then dry the filter residue at 110 °C to obtain alkalized brown fused alumina micro - powder.
[0096] Step 2), Mix 8 kg of tert - butylaminoethyl methacrylate, 5 kg of isooctyl acrylate, and 4 kg of hydrogenated tallow amine polyoxyethylene ether evenly to prepare a modification liquid. Immerse 17 kg of alkalized brown fused alumina micro - powder in 17 kg of the modification liquid at a constant temperature of 58 °C for 3.5 h for immersion modification. Then filter out the filter residue through a filter cloth, and then air - dry the filter residue naturally to obtain modified brown fused alumina micro - powder.
[0097] The brown fused alumina micro - powder is purchased from Henan Youji Environmental Protection Technology Co., Ltd., with a mesh size of 240.
[0098] The sodium hydroxide is sourced commercially, CAS No.: 1310 - 73 - 2.
[0099] The tert - butylaminoethyl methacrylate is purchased from Changzhou Aozun Composite New Materials Co., Ltd.
[0100] The isooctyl acrylate is purchased from Jinan Rongzheng Chemical Co., Ltd.
[0101] The hydrogenated tallow amine polyoxyethylene ether is purchased from Jiangsu Haian Petrochemical Factory.
[0102] The preparation method of the high - permeability concrete composition is as follows: Step 01), Put 315 kg of cement, 35 kg of fly ash, 1190 kg of coarse aggregate, 11 kg of modified brown fused alumina micro - powder, 3 kg of polycarboxylate superplasticizer, and 3 kg of potassium formate into a mixer, with a rotation speed of 60 r / min, and stir for 5 min to mix evenly to obtain a premix.
[0103] Step 02), Add 100 kg of water to the premix, with a rotation speed of 60 r / min, and stir for 5 min to stir evenly to obtain the high - permeability concrete composition.
[0104] Comparative Example 3 A highly water-permeable concrete composition comprising the following components in parts by mass: Water, cement, fly ash, coarse aggregate, modified brown fused alumina powder, and additives.
[0105] The cement is ordinary Portland cement, purchased from Runfeng Cement, standard: P.O 42.5R.
[0106] The fly ash was purchased from LingShou County ShuangShi Mineral Products Processing Factory, Class II fly ash.
[0107] The coarse aggregate is basalt gravel, sourced commercially, with a particle size of 20 - 25 mm.
[0108] The additives are a compound of polycarboxylate water reducer and potassium formate.
[0109] The polycarboxylate water reducer was purchased from Shandong Tenghua New Materials Co., Ltd.
[0110] The potassium formate was purchased from Jinan Yuanlian Chemical Co., Ltd.
[0111] The modified brown fused alumina powder is self-made, and the modification method of the brown fused alumina powder is as follows: Step 1), dissolve sodium hydroxide in water to prepare a sodium hydroxide solution with a concentration of 45%, soak 30 kg of brown fused alumina powder in 30 kg of sodium hydroxide solution for 60 min for alkalization modification, then filter through a filter cloth to filter out the filter residue, wash the filter residue with clear water until the pH value of the washing water ≤ 8, and then dry the filter residue at 110 °C to obtain alkalized brown fused alumina powder.
[0112] Step 2), mix 8 kg of tert-butylaminoethyl methacrylate, 5 kg of isobutyltriethoxysilane, and 4 kg of propyltrimethoxysilane evenly to prepare a modification solution, soak 17 kg of alkalized brown fused alumina powder in 17 kg of the modification solution at a constant temperature of 58 °C for 3.5 h for immersion modification, then filter through a filter cloth to filter out the filter residue, and then air-dry the filter residue naturally to obtain modified brown fused alumina powder.
[0113] The brown fused alumina powder was purchased from Henan Youji Environmental Protection Technology Co., Ltd., 240 mesh.
[0114] The sodium hydroxide is sourced commercially, CAS No.: 1310 - 73 - 2.
[0115] The tert-butylaminoethyl methacrylate was purchased from Changzhou Aozun Composite New Materials Co., Ltd.
[0116] The isobutyltriethoxysilane was purchased from Qufu Yishun Chemical Co., Ltd.
[0117] The propyltrimethoxysilane was purchased from Zhongshan Dixin Chemical Co., Ltd.
[0118] The preparation method of the high water permeability concrete composition is as follows: Step 01), put 315 kg of cement, 35 kg of fly ash, 1190 kg of coarse aggregate, 11 kg of modified brown fused alumina micropowder, 3 kg of polycarboxylate water reducer, and 3 kg of potassium formate into a mixer, with a rotation speed of 60 r / min, stir for 5 min, mix evenly to obtain a premix.
[0119] Step 02), add 100 kg of water to the premix, with a rotation speed of 60 r / min, stir for 5 min, stir evenly to obtain the high water permeability concrete composition.
[0120] Comparative Example 4 A high water permeability concrete composition, comprising the following components in parts by mass: Water, cement, fly ash, coarse aggregate, modified brown fused alumina micropowder, and additives.
[0121] The cement is ordinary Portland cement, purchased from Runfeng Cement, standard: P.O 42.5R.
[0122] The fly ash is purchased from LingShou County ShuangShi Mineral Products Processing Factory, secondary fly ash.
[0123] The coarse aggregate is basalt gravel, sourced from the market, with a particle size of 20 - 25 mm.
[0124] The additives are a compound of polycarboxylate water reducer and potassium formate.
[0125] The polycarboxylate water reducer is purchased from Shandong Tenghua New Materials Co., Ltd.
[0126] The potassium formate is purchased from Jinan Yuanlian Chemical Co., Ltd.
[0127] The modified brown fused alumina micropowder is self-made, and the modification method of the brown fused alumina micropowder is as follows: Step 1), dissolve sodium hydroxide in water to prepare a sodium hydroxide solution with a concentration of 45%, soak 30 kg of brown fused alumina micropowder in 30 kg of sodium hydroxide solution for 60 min for alkalization modification, then filter out the filter residue through a filter cloth, rinse the filter residue with clear water until the pH value of the rinsing water ≤ 8, and then dry the filter residue at 110 °C to obtain alkalized brown fused alumina micropowder.
[0128] Step 2), mix 8 kg of bisphenol A diallyl ether, 5 kg of isooctyl acrylate, and 4 kg of propyltrimethoxysilane evenly to prepare a modification liquid, soak 17 kg of alkalized brown fused alumina micropowder in 17 kg of modification liquid at a constant temperature of 58 °C for 3.5 h for immersion modification, then filter out the filter residue through a filter cloth, and then air-dry the filter residue naturally to obtain the modified brown fused alumina micropowder.
[0129] The brown fused alumina micropowder was purchased from Henan Youji Environmental Protection Technology Co., Ltd., with a mesh size of 240.
[0130] Sodium hydroxide is commercially available, CAS No.: 1310-73-2.
[0131] Bisphenol A diallyl ether was purchased from Qingdao Baichen New Materials Technology Co., Ltd.
[0132] Isooctyl acrylate was purchased from Jinan Rongzheng Chemical Co., Ltd.
[0133] Propyltrimethoxysilane was purchased from Zhongshan Dixin Chemical Co., Ltd.
[0134] The preparation method of the high water permeability concrete composition is as follows: Step 01), put 315 kg of cement, 35 kg of fly ash, 1190 kg of coarse aggregate, 11 kg of modified brown fused alumina micropowder, 3 kg of polycarboxylate superplasticizer, and 3 kg of potassium formate into a mixer, with a rotation speed of 60 r / min, stir for 5 min, and mix evenly to obtain a premix.
[0135] Step 02), add 100 kg of water to the premix, with a rotation speed of 60 r / min, stir for 5 min, and stir evenly to obtain the high water permeability concrete composition.
[0136] Comparative Example 5 A high water permeability concrete composition, comprising the following components in parts by mass: Water, cement, fly ash, coarse aggregate, modified brown fused alumina micropowder, additives.
[0137] The cement is ordinary Portland cement, purchased from Runfeng Cement, standard: P.O 42.5R.
[0138] The fly ash was purchased from Lingshou Shuangshi Mineral Products Processing Factory, and it is secondary fly ash.
[0139] The coarse aggregate is basalt gravel, commercially available, with a particle size of 20-25 mm.
[0140] The additives are a compound of polycarboxylate superplasticizer and potassium formate.
[0141] The polycarboxylate superplasticizer was purchased from Shandong Tenghua New Materials Co., Ltd.
[0142] Potassium formate was purchased from Jinan Yuanlian Chemical Co., Ltd.
[0143] The modified brown fused alumina micropowder was self-made, and the modification method of the brown fused alumina micropowder is as follows: Step 1): Mix 8 kg of tert-butylaminoethyl methacrylate, 5 kg of isobutyltriethoxysilane, and 4 kg of hydrogenated tallow amine polyoxyethylene ether evenly to prepare a modified liquid. Soak 17 kg of brown fused alumina micropowder in 17 kg of the modified liquid at a constant temperature of 58 °C for 3.5 h for immersion modification. Then filter out the filter residue through a filter cloth, and then air-dry the filter residue naturally to obtain modified brown fused alumina micropowder.
[0144] The brown fused alumina micropowder is purchased from Henan Youji Environmental Protection Technology Co., Ltd., with a mesh size of 240.
[0145] Sodium hydroxide is commercially available, CAS No.: 1310-73-2.
[0146] Tert-butylaminoethyl methacrylate is purchased from Changzhou Aozun Composite New Materials Co., Ltd.
[0147] Isobutyltriethoxysilane is purchased from Qufu Yishun Chemical Co., Ltd.
[0148] Hydrogenated tallow amine polyoxyethylene ether is purchased from Jiangsu Haian Petrochemical Factory.
[0149] The preparation method of the high water permeability concrete composition is as follows: Step 01): Put 315 kg of cement, 35 kg of fly ash, 1190 kg of coarse aggregate, 11 kg of modified brown fused alumina micropowder, 3 kg of polycarboxylate water reducer, and 3 kg of potassium formate into a mixer, with a rotation speed of 60 r / min, and stir for 5 min to mix evenly to obtain a premix.
[0150] Step 02): Add 100 kg of water to the premix, with a rotation speed of 60 r / min, and stir for 5 min to stir evenly to obtain the high water permeability concrete composition.
[0151] Experiment 1 According to GB / T50081-2019 "Standard for Test Methods of Physical and Mechanical Properties of Concrete", test the 7-day compressive strength and 28-day compressive strength of the test specimens made of the high water permeability concrete composition in each example and comparative example.
[0152] Preparation of test specimens: Pour the high water permeability concrete composition into a mold, sprinkle water for curing for 3 days, demold, and statically cure until the 7th day and the 28th day, and conduct tests respectively.
[0153] Experiment 2 According to GB / T25993-2010 "Permeable Paving Bricks and Permeable Pavement Panels", test the water permeability grade of the concrete specimens made of the high water permeability concrete composition in each example and comparative example.
[0154] Grade A: Permeability coefficient ≥ 2.0×10 -2 .
[0155] Grade B: Permeability coefficient ≥ 1.0×10 -2 .
[0156] For the specific test data of Experiment 1-2, see Table 1 for details.
[0157] Table 1 According to the data comparison of each example and comparative example in Table 1, each example and comparative example have good water permeability performance, but the strength of each example is significantly higher than that of each comparative example. It can be seen that in each example, the modification with the modified liquid compounded by alkalization modification and tert-butylaminoethyl methacrylate, isobutyltriethoxysilane, and hydrogenated tallow amine polyoxyethylene ether can make the strengthening effect of the modified brown fused alumina micropowder on concrete very significant. In Comparative Examples 1-4, the special compounding system compounded by tert-butylaminoethyl methacrylate, isobutyltriethoxysilane, and hydrogenated tallow amine polyoxyethylene ether is damaged. Although it can also play a certain modification effect, the effect is significantly reduced, resulting in a significant decrease in the strength of the concrete. In Comparative Example 5, due to the lack of alkalization modification, the effect of the modified liquid on the brown fused alumina micropowder is extremely poor, resulting in a significant decrease in the effect of the modified brown fused alumina micropowder on strengthening the concrete.
[0158] This specific embodiment is only an explanation of the present application, and it does not limit the present application. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.
Claims
1. A highly water-permeable concrete composition, characterized in that: Comprising the following components in parts by mass: 100 parts of water; 310 - 320 parts of cement; 33 - 37 parts of fly ash; 1180 - 1200 parts of coarse aggregate; 10 - 12 parts of modified brown fused alumina micropowder; 5.8 - 6.2 parts of auxiliary agent; The modification method of the said modified brown fused alumina micropowder is as follows: Step 1), soaking the brown fused alumina micropowder in a strong alkali solution for alkalization modification, filtering out and washing, to obtain alkalized brown fused alumina micropowder; Step 2), soaking the alkalized brown fused alumina micropowder in a modification solution for modification, filtering out and drying, to obtain modified brown fused alumina micropowder; The said modification solution is a compound of tert-butylaminoethyl methacrylate, isobutyltriethoxysilane, and hydrogenated tallow amine polyoxyethylene ether.
2. The high-permeability concrete composition according to claim 1, characterized in that: In the said modification solution, the mass ratio of tert-butylaminoethyl methacrylate, isobutyltriethoxysilane, and hydrogenated tallow amine polyoxyethylene ether is 7 - 9:4 - 6:3 - 5.
3. The highly permeable concrete composition according to claim 2, wherein: The said strong alkali solution is a sodium hydroxide solution, and the concentration of the sodium hydroxide solution is 40 - 50%.
4. The highly water-permeable concrete composition according to claim 3, characterized in that: In the said Step 1), the brown fused alumina micropowder is soaked in the strong alkali solution for 50 - 70 min.
5. A highly permeable concrete composition according to claim 2, characterized in that: In the said Step 2), the alkalized brown fused alumina micropowder is soaked in the modification solution, at a constant temperature of 55 - 60 °C, and soaked for modification for 3 - 4 h.
6. A highly water-permeable concrete composition according to claim 1, characterized in that: The said auxiliary agent is a compound of polycarboxylate superplasticizer and potassium formate.
7. A highly water-permeable concrete composition according to claim 6, characterized in that: The mass ratio of the polycarboxylate superplasticizer and potassium formate is 2.9 - 3.1:2.9 - 3.
1.
8. A method for preparing a highly water-permeable concrete composition according to any one of claims 1-7, characterized in that: Comprising the following steps: Step 01), mixing cement, fly ash, coarse aggregate, modified brown fused alumina micropowder, and auxiliary agent evenly to obtain a premix; Step 02), adding water to the premix and stirring evenly to obtain a high-permeability concrete composition.