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A platform for research: civil engineering, architecture and urbanism
Low-shrinkage high-strength self-healing concrete and preparation method thereof
The invention relates to low-shrinkage high-strength self-healing concrete and a preparation method thereof. The preparation method comprises the following steps: step 1, uniformly mixing and stirring 2-4 parts of a capillary crystalline waterproofing agent and 100-200 parts of water to obtain a solution A; step 2, mixing 6-20 parts of nano silicon dioxide and 3-4 parts of a water reducing agent, and carrying out ultrasonic dispersion to obtain a turbid liquid B; 3, 140-280 parts of iron tailing sand and 700-800 parts of river sand are compounded; then uniformly mixing and stirring the compounded iron tailing sand and river sand with 600-700 parts of coarse aggregate, 300-400 parts of cement and 100-150 parts of fly ash to obtain a dry mixture C; 4, adding the solution A into the dry mixture C, and uniformly stirring to obtain slurry D; 5, adding the turbid liquid B into the slurry D, and uniformly stirring to obtain slurry E; and 6, adding 7-18 parts of an expanding agent into the slurry E, and uniformly stirring to obtain the low-shrinkage high-strength self-healing concrete. The concrete disclosed by the invention has excellent crack self-healing performance while ensuring that the concrete is stable and compact in volume and good in mechanical property.
本发明涉及一种低收缩高强自愈合混凝土及其制备方法，包括：步骤1、将2‑4份渗透结晶型防水剂和100‑200份水混合搅拌均匀得到溶液A；步骤2、将6‑20份的纳米二氧化硅和3‑4份的减水剂混合进行超声分散，得到悬浊液B；步骤3、140‑280份铁尾矿砂和700‑800份河砂复配；然后将复配后的铁尾矿砂、河砂与600‑700份粗骨料、300‑400份水泥和100‑150份粉煤灰混合搅拌均匀得到干混料C；步骤4、将溶液A加入干混料C中搅拌均匀，得到浆料D；步骤5、将悬浊液B加入浆料D中搅拌均匀，得到浆料E；步骤6、将7‑18份的膨胀剂加入浆料E中搅拌均匀，得到低收缩高强自愈合混凝土。本发明的混凝土在保证混凝土体积稳定密实，保持良好的力学性能的同时，还具备优异的裂缝自愈合性能。
Low-shrinkage high-strength self-healing concrete and preparation method thereof
The invention relates to low-shrinkage high-strength self-healing concrete and a preparation method thereof. The preparation method comprises the following steps: step 1, uniformly mixing and stirring 2-4 parts of a capillary crystalline waterproofing agent and 100-200 parts of water to obtain a solution A; step 2, mixing 6-20 parts of nano silicon dioxide and 3-4 parts of a water reducing agent, and carrying out ultrasonic dispersion to obtain a turbid liquid B; 3, 140-280 parts of iron tailing sand and 700-800 parts of river sand are compounded; then uniformly mixing and stirring the compounded iron tailing sand and river sand with 600-700 parts of coarse aggregate, 300-400 parts of cement and 100-150 parts of fly ash to obtain a dry mixture C; 4, adding the solution A into the dry mixture C, and uniformly stirring to obtain slurry D; 5, adding the turbid liquid B into the slurry D, and uniformly stirring to obtain slurry E; and 6, adding 7-18 parts of an expanding agent into the slurry E, and uniformly stirring to obtain the low-shrinkage high-strength self-healing concrete. The concrete disclosed by the invention has excellent crack self-healing performance while ensuring that the concrete is stable and compact in volume and good in mechanical property.
本发明涉及一种低收缩高强自愈合混凝土及其制备方法，包括：步骤1、将2‑4份渗透结晶型防水剂和100‑200份水混合搅拌均匀得到溶液A；步骤2、将6‑20份的纳米二氧化硅和3‑4份的减水剂混合进行超声分散，得到悬浊液B；步骤3、140‑280份铁尾矿砂和700‑800份河砂复配；然后将复配后的铁尾矿砂、河砂与600‑700份粗骨料、300‑400份水泥和100‑150份粉煤灰混合搅拌均匀得到干混料C；步骤4、将溶液A加入干混料C中搅拌均匀，得到浆料D；步骤5、将悬浊液B加入浆料D中搅拌均匀，得到浆料E；步骤6、将7‑18份的膨胀剂加入浆料E中搅拌均匀，得到低收缩高强自愈合混凝土。本发明的混凝土在保证混凝土体积稳定密实，保持良好的力学性能的同时，还具备优异的裂缝自愈合性能。
Low-shrinkage high-strength self-healing concrete and preparation method thereof
一种低收缩高强自愈合混凝土及其制备方法
QU WEI (author) / ZHU KUN (author) / WANG LI (author) / ZHANG YUQIAN (author) / ZHU MINTAO (author) / BIAN CHENGHUI (author) / LYU JIWEI (author) / GU WEIHONG (author)
2024-01-30
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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