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A platform for research: civil engineering, architecture and urbanism
Low-carbon engineering cement-based composite material and preparation method thereof
The invention relates to a low-carbon engineering cement-based composite material and a preparation method thereof. The low-carbon engineering cement-based composite material is prepared from the following components in parts by weight. The concrete is prepared from the following components in parts by weight: 240 to 370 parts of cement, 550 to 650 parts of calcined clay, 140 to 330 parts of light-burned dolomite powder, 340 to 370 parts of quartz sand, 26 parts of PVA fiber, 425 parts of water and 3 to 4.5 parts of high-efficiency water reducing agent. According to the invention, high pozzolanic activity and particle filling effect of the metakaolin component in the calcined clay are utilized, so that high strength can be obtained under the condition of low cement consumption. After the dolomite is calcined, the main component of the dolomite is converted into MgO and CaCO3 from MgCO3CaCO3, MgO can be used as an expansion component in a gel system, and Mg (OH) 2 is generated in the hydration process to compensate the shrinkage of the cement-based composite material. CaCO3, calcined clay and cement serve as a ternary system, CaCO3 serves as a supplementary carbonate source and is subjected to a carboaluminate reaction with aluminum-containing calcined clay under the alkaline condition, a cement pore structure is refined, a cement hydration matrix is compacted, and therefore the strength reduction caused by cement consumption reduction is made up.
本发明涉及一种低碳型工程水泥基复合材料及其制备方法，包括由以下重量份比例的组分配制而成；水泥240～370份，煅烧粘土550～650份，轻烧白云石粉140～330份，石英砂340～370份，PVA纤维26份，水425份，高效减水剂3～4.5份；本发明利用煅烧粘土中偏高岭土组分的高火山灰活性和颗粒填充效应，在较少的水泥用量下，也能获得较高的强度。对白云石进行煅烧后，其主要成分由MgCO3•CaCO3转变为MgO与CaCO3，MgO可作为胶凝体系中的膨胀组分，在水化过程中生成Mg(OH)2，补偿水泥基复合材料的收缩。CaCO3与煅烧粘土和水泥作为三元体系，CaCO3作为补充的碳酸盐来源，与含铝的煅烧粘土在碱性条件下发生碳铝酸盐反应，细化水泥孔结构，密实水泥水化基体，从而弥补水泥用量减少所导致的强度降低。
Low-carbon engineering cement-based composite material and preparation method thereof
The invention relates to a low-carbon engineering cement-based composite material and a preparation method thereof. The low-carbon engineering cement-based composite material is prepared from the following components in parts by weight. The concrete is prepared from the following components in parts by weight: 240 to 370 parts of cement, 550 to 650 parts of calcined clay, 140 to 330 parts of light-burned dolomite powder, 340 to 370 parts of quartz sand, 26 parts of PVA fiber, 425 parts of water and 3 to 4.5 parts of high-efficiency water reducing agent. According to the invention, high pozzolanic activity and particle filling effect of the metakaolin component in the calcined clay are utilized, so that high strength can be obtained under the condition of low cement consumption. After the dolomite is calcined, the main component of the dolomite is converted into MgO and CaCO3 from MgCO3CaCO3, MgO can be used as an expansion component in a gel system, and Mg (OH) 2 is generated in the hydration process to compensate the shrinkage of the cement-based composite material. CaCO3, calcined clay and cement serve as a ternary system, CaCO3 serves as a supplementary carbonate source and is subjected to a carboaluminate reaction with aluminum-containing calcined clay under the alkaline condition, a cement pore structure is refined, a cement hydration matrix is compacted, and therefore the strength reduction caused by cement consumption reduction is made up.
本发明涉及一种低碳型工程水泥基复合材料及其制备方法，包括由以下重量份比例的组分配制而成；水泥240～370份，煅烧粘土550～650份，轻烧白云石粉140～330份，石英砂340～370份，PVA纤维26份，水425份，高效减水剂3～4.5份；本发明利用煅烧粘土中偏高岭土组分的高火山灰活性和颗粒填充效应，在较少的水泥用量下，也能获得较高的强度。对白云石进行煅烧后，其主要成分由MgCO3•CaCO3转变为MgO与CaCO3，MgO可作为胶凝体系中的膨胀组分，在水化过程中生成Mg(OH)2，补偿水泥基复合材料的收缩。CaCO3与煅烧粘土和水泥作为三元体系，CaCO3作为补充的碳酸盐来源，与含铝的煅烧粘土在碱性条件下发生碳铝酸盐反应，细化水泥孔结构，密实水泥水化基体，从而弥补水泥用量减少所导致的强度降低。
Low-carbon engineering cement-based composite material and preparation method thereof
一种低碳型工程水泥基复合材料及其制备方法
CHENG SHENGZHAO (author) / CHEN LU (author) / ZHU HAITANG (author) / LU HAILU (author) / CHEN JING (author) / CHEN WEIGE (author) / ZENG FENGJUAN (author) / MENG QINGXIN (author)
2023-11-24
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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