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Low-shrinkage self-compacting micro-expansion concrete and preparation method thereof
The invention discloses low-shrinkage self-compacting micro-expansion concrete and a preparation method thereof. The concrete comprises 270 to 330 parts of cement, 80 to 120 parts of fly ash, 30 to 70 parts of mineral powder, 10 to 50 parts of a composite expanding agent, 700 to 900 parts of sand, 900 to 1100 parts of stone, 7 to 11 parts of a water reducing agent, 0.1 to 2 parts of an internal curing agent, 0.5 to 1 part of fiber and 140 to 160 parts of water. The internal curing agent is prepared from 5 to 25 parts of maltodextrin, 1 to 10 parts of filler, 5 to 15 parts of macromolecular organic matters, 5 to 30 parts of ionic monomers, 5 to 30 parts of nonionic monomers, 0.01 to 1 part of cross-linking agent, 0.001 to 0.1 part of initiator, 1 to 10 parts of neutralizing reagent and 60 to 90 parts of water. The concrete has excellent workability, pumpability, high strength and low shrinkage, can realize self-curing, and solves the problem that common self-compacting concrete is difficult to cure, so that the action of an expanding agent is not obvious.
本发明公开了一种低收缩自密实微膨胀混凝土及其制备方法。该混凝土包含水泥270‑330份，粉煤灰80‑120份，矿粉30‑70份，复合膨胀剂10‑50份，砂700‑900份，石900‑1100份，减水剂7‑11份，内养护剂0.1‑2份，纤维0.5‑1份，水140‑160份；内养护剂包括麦芽糊精5‑25份，填料1‑10份，大分子有机物5‑15份，离子型单体5‑30份，非离子型单体5‑30份，交联剂0.01‑1份，引发剂0.001‑0.1份，中和试剂1‑10份，水60‑90份。该混凝土具有优异的工作性、泵送性、高强度、低收缩，还能实现自养护，解决普通自密实混凝土较难养护导致膨胀剂作用不明显的问题。
Low-shrinkage self-compacting micro-expansion concrete and preparation method thereof
The invention discloses low-shrinkage self-compacting micro-expansion concrete and a preparation method thereof. The concrete comprises 270 to 330 parts of cement, 80 to 120 parts of fly ash, 30 to 70 parts of mineral powder, 10 to 50 parts of a composite expanding agent, 700 to 900 parts of sand, 900 to 1100 parts of stone, 7 to 11 parts of a water reducing agent, 0.1 to 2 parts of an internal curing agent, 0.5 to 1 part of fiber and 140 to 160 parts of water. The internal curing agent is prepared from 5 to 25 parts of maltodextrin, 1 to 10 parts of filler, 5 to 15 parts of macromolecular organic matters, 5 to 30 parts of ionic monomers, 5 to 30 parts of nonionic monomers, 0.01 to 1 part of cross-linking agent, 0.001 to 0.1 part of initiator, 1 to 10 parts of neutralizing reagent and 60 to 90 parts of water. The concrete has excellent workability, pumpability, high strength and low shrinkage, can realize self-curing, and solves the problem that common self-compacting concrete is difficult to cure, so that the action of an expanding agent is not obvious.
本发明公开了一种低收缩自密实微膨胀混凝土及其制备方法。该混凝土包含水泥270‑330份，粉煤灰80‑120份，矿粉30‑70份，复合膨胀剂10‑50份，砂700‑900份，石900‑1100份，减水剂7‑11份，内养护剂0.1‑2份，纤维0.5‑1份，水140‑160份；内养护剂包括麦芽糊精5‑25份，填料1‑10份，大分子有机物5‑15份，离子型单体5‑30份，非离子型单体5‑30份，交联剂0.01‑1份，引发剂0.001‑0.1份，中和试剂1‑10份，水60‑90份。该混凝土具有优异的工作性、泵送性、高强度、低收缩，还能实现自养护，解决普通自密实混凝土较难养护导致膨胀剂作用不明显的问题。
Low-shrinkage self-compacting micro-expansion concrete and preparation method thereof
一种低收缩自密实微膨胀混凝土及其制备方法
CHENG KAI (author) / ZHANG JIANFENG (author) / JIA YANG (author) / SUN WANWAN (author) / LIU SHIQI (author) / WANG JIAN (author)
2023-06-02
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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