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Concrete doped with high-performance machine-made sandstone powder and preparation method thereof
The invention discloses concrete doped with high-performance machine-made sandstone powder and a preparation method of the concrete. The concrete is prepared from water, cement, the high-performance machine-made sandstone powder, coarse aggregate and fine aggregate, and the high-performance machine-made sandstone powder is prepared through the following steps that the machine-made sandstone powder is ground to obtain small-particle-size stone powder with the surface area smaller than or equal to 380 m < 2 >/kg and the particle size smaller than or equal to 5 microns; carrying out thermogravimetric analysis on the small-particle-size stone powder, and then determining the calcination temperature; and calcining the small-particle-size stone powder at the calcining temperature to prepare the high-performance machine-made sandstone powder. The high-performance machine-made sandstone powder obtained by grinding and calcining the machine-made sandstone powder is used as a mineral admixture of the concrete, so that the consumption of cement, fly ash and slag powder is reduced, the mechanical property of the concrete is further improved, the contractility of the concrete is reduced, and the cracking risk is reduced; and the method plays an important role in improving the durability of a concrete structure.
本发明公开了一种掺加高性能机制砂石粉的混凝土及其制备方法，该混凝土原料包括水、水泥、高性能机制砂石粉、粗骨料、细骨料，所述高性能机制砂石粉按以下方法制得：将机制砂石粉进行粉磨加工后得到表面积≤380m2/kg，粒径≤5μm的小粒径石粉；对小粒径石粉进行热重分析后确定煅烧温度；将小粒径石粉于所述煅烧温度下煅烧，制得高性能机制砂石粉。对机制砂石粉进行粉磨加工并煅烧后获得的高性能机制砂石粉作为混凝土的矿物掺合料，不仅减少了水泥、粉煤灰、矿渣粉的用量，还进一步提升了混凝土的力学性能，降低了混凝土的收缩性，减小了开裂风险，对提高混凝土结构的耐久性起到了重要作用。
Concrete doped with high-performance machine-made sandstone powder and preparation method thereof
The invention discloses concrete doped with high-performance machine-made sandstone powder and a preparation method of the concrete. The concrete is prepared from water, cement, the high-performance machine-made sandstone powder, coarse aggregate and fine aggregate, and the high-performance machine-made sandstone powder is prepared through the following steps that the machine-made sandstone powder is ground to obtain small-particle-size stone powder with the surface area smaller than or equal to 380 m < 2 >/kg and the particle size smaller than or equal to 5 microns; carrying out thermogravimetric analysis on the small-particle-size stone powder, and then determining the calcination temperature; and calcining the small-particle-size stone powder at the calcining temperature to prepare the high-performance machine-made sandstone powder. The high-performance machine-made sandstone powder obtained by grinding and calcining the machine-made sandstone powder is used as a mineral admixture of the concrete, so that the consumption of cement, fly ash and slag powder is reduced, the mechanical property of the concrete is further improved, the contractility of the concrete is reduced, and the cracking risk is reduced; and the method plays an important role in improving the durability of a concrete structure.
本发明公开了一种掺加高性能机制砂石粉的混凝土及其制备方法，该混凝土原料包括水、水泥、高性能机制砂石粉、粗骨料、细骨料，所述高性能机制砂石粉按以下方法制得：将机制砂石粉进行粉磨加工后得到表面积≤380m2/kg，粒径≤5μm的小粒径石粉；对小粒径石粉进行热重分析后确定煅烧温度；将小粒径石粉于所述煅烧温度下煅烧，制得高性能机制砂石粉。对机制砂石粉进行粉磨加工并煅烧后获得的高性能机制砂石粉作为混凝土的矿物掺合料，不仅减少了水泥、粉煤灰、矿渣粉的用量，还进一步提升了混凝土的力学性能，降低了混凝土的收缩性，减小了开裂风险，对提高混凝土结构的耐久性起到了重要作用。
Concrete doped with high-performance machine-made sandstone powder and preparation method thereof
一种掺加高性能机制砂石粉的混凝土及其制备方法
CHENG WEIHAO (author) / SHAO HUIQING (author) / GE DONGLIANG (author) / LIU KEXUE (author) / WU RUI (author) / WANG JIEYAN (author) / LIU HAIYANG (author)
2023-09-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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