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A platform for research: civil engineering, architecture and urbanism
Low-shrinkage anti-crack concrete and preparation method thereof
The invention discloses low-shrinkage anti-crack concrete and a preparation method thereof, and belongs to the technical field of building materials. The low-shrinkage anti-crack concrete is prepared from the following components in parts by mass: 140 to 200 parts of water, 300 to 400 parts of cement, 650 to 850 parts of sand, 950 to 1100 parts of gravel, 6.0 to 10.0 parts of a water reducing agent, 50 to 100 parts of fly ash, 15 to 20 parts of an expanding agent and 15 to 35 parts of rice hull ash. The expansion agent and the rice hull ash are doped, the porous structure of the rice hull ash is utilized, and the rice hull ash is used as an internal curing material, so that the shrinkage of the concrete is reduced. On the premise of not obviously reducing the compressive strength of the concrete, the purpose of greatly reducing the shrinkage of the concrete is achieved, and the prepared concrete is relatively stable in volume and excellent in early cracking resistance.
本发明公开了一种低收缩抗裂混凝土及其制备方法，属于建筑材料技术领域。所述的低收缩抗裂混凝土包括按质量份数计算的以下组分：水：140～200份，水泥：300～400份，砂：650～850份，碎石：950～1100份，减水剂：6.0～10.0份，粉煤灰：50～100份，膨胀剂：15～20份，稻壳灰：15～35份。本发明通过使用膨胀剂和稻壳灰双掺的方式，利用了稻壳灰的多孔结构，将其作为内养护材料，减小了混凝土的收缩。在不明显降低混凝土抗压强度的前提下，实现大幅减小其收缩目的，所制备的混凝土体积较为稳定，抗早期开裂性能优异。
Low-shrinkage anti-crack concrete and preparation method thereof
The invention discloses low-shrinkage anti-crack concrete and a preparation method thereof, and belongs to the technical field of building materials. The low-shrinkage anti-crack concrete is prepared from the following components in parts by mass: 140 to 200 parts of water, 300 to 400 parts of cement, 650 to 850 parts of sand, 950 to 1100 parts of gravel, 6.0 to 10.0 parts of a water reducing agent, 50 to 100 parts of fly ash, 15 to 20 parts of an expanding agent and 15 to 35 parts of rice hull ash. The expansion agent and the rice hull ash are doped, the porous structure of the rice hull ash is utilized, and the rice hull ash is used as an internal curing material, so that the shrinkage of the concrete is reduced. On the premise of not obviously reducing the compressive strength of the concrete, the purpose of greatly reducing the shrinkage of the concrete is achieved, and the prepared concrete is relatively stable in volume and excellent in early cracking resistance.
本发明公开了一种低收缩抗裂混凝土及其制备方法，属于建筑材料技术领域。所述的低收缩抗裂混凝土包括按质量份数计算的以下组分：水：140～200份，水泥：300～400份，砂：650～850份，碎石：950～1100份，减水剂：6.0～10.0份，粉煤灰：50～100份，膨胀剂：15～20份，稻壳灰：15～35份。本发明通过使用膨胀剂和稻壳灰双掺的方式，利用了稻壳灰的多孔结构，将其作为内养护材料，减小了混凝土的收缩。在不明显降低混凝土抗压强度的前提下，实现大幅减小其收缩目的，所制备的混凝土体积较为稳定，抗早期开裂性能优异。
Low-shrinkage anti-crack concrete and preparation method thereof
一种低收缩抗裂混凝土及其制备方法
ZHANG ZHENYU (author) / QIN ZEHONG (author) / DU FUYING (author) / ZHANG QIAOBING (author) / HUANG JINGXIN (author) / AN GANGJIAN (author) / ZHANG DONG (author) / ZHANG PU (author) / ZHOU CHAOFAN (author) / LU ZHIYONG (author)
2024-03-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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