A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention relates to the technical field of preparation of novel building materials, and discloses a method for reducing the preparation cost of sulphoaluminate cement. The method performs modification of fly ash, and the obtained modified fly ash is used as a bauxite substitute for preparing sulphoaluminate cement clinker; rare earth is used for activating hydration activity of mineral substances in the coal ash so as to provide early hydration strength for cement, and the stability of later activity is maintained; the method has a fast hydration speed, stimulates activity, exerts later strength, improves the microstructure of the sulphoaluminate cement slurry, inhibits the later strength from collapsing, is very beneficial to the performance development of sulphoaluminate cement, andreduces the production cost of cement. The prepared sulphoaluminate cement has the 3-day compressive strength of 56 MPa or above and the 28-day compressive strength of 78 MPa or above, fly ash is effectively utilized, and the cost is reduced.
本发明涉及新型建筑材料制备技术领域，公开了一种降低硫铝酸盐水泥制备成本的方法，对粉煤灰进行改性，得到改性粉煤灰作为铝矾土代替料用于硫铝酸盐水泥熟料的制备，利用稀土激活粉煤灰中矿物质的水化活性，能够为水泥提供早期水化强度，并保持后期活性的稳定，水化速度较快，活性激发，后期强度得以发挥，还能够改善硫铝酸盐水泥浆料的微结构，抑制后期强度出现倒缩的现象，对硫铝酸盐水泥性能发展十分有利，降低水泥生产成本。制备得到的硫铝酸盐水泥3天抗压强度达到56MPa以上，28天抗压强度达到78MPa以上，有效利用了粉煤灰，降低了成本。
The invention relates to the technical field of preparation of novel building materials, and discloses a method for reducing the preparation cost of sulphoaluminate cement. The method performs modification of fly ash, and the obtained modified fly ash is used as a bauxite substitute for preparing sulphoaluminate cement clinker; rare earth is used for activating hydration activity of mineral substances in the coal ash so as to provide early hydration strength for cement, and the stability of later activity is maintained; the method has a fast hydration speed, stimulates activity, exerts later strength, improves the microstructure of the sulphoaluminate cement slurry, inhibits the later strength from collapsing, is very beneficial to the performance development of sulphoaluminate cement, andreduces the production cost of cement. The prepared sulphoaluminate cement has the 3-day compressive strength of 56 MPa or above and the 28-day compressive strength of 78 MPa or above, fly ash is effectively utilized, and the cost is reduced.
本发明涉及新型建筑材料制备技术领域，公开了一种降低硫铝酸盐水泥制备成本的方法，对粉煤灰进行改性，得到改性粉煤灰作为铝矾土代替料用于硫铝酸盐水泥熟料的制备，利用稀土激活粉煤灰中矿物质的水化活性，能够为水泥提供早期水化强度，并保持后期活性的稳定，水化速度较快，活性激发，后期强度得以发挥，还能够改善硫铝酸盐水泥浆料的微结构，抑制后期强度出现倒缩的现象，对硫铝酸盐水泥性能发展十分有利，降低水泥生产成本。制备得到的硫铝酸盐水泥3天抗压强度达到56MPa以上，28天抗压强度达到78MPa以上，有效利用了粉煤灰，降低了成本。
Preparation process of low-cost anti-permeability sulphoaluminate cement
| European Patent Office | 2021