Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Desulfurized building gypsum-based self-leveling mortar
The invention discloses desulfurized building gypsum-based self-leveling mortar which is prepared from the following components in parts by weight: 70 parts of a cementing material, 30 parts of aggregate, 0.14 to 0.175 part of a powder polycarboxylic acid water reducing agent, 0.245 to 0.315 part of a protein retarder, 0.049 to 0.077 part of a polyether powder defoaming agent, 0.49 to 0.875 part of redispersible latex powder, 0.042 to 0.07 part of hydroxypropyl methyl cellulose ether and 33 to 37 parts of water, the cementing material is composed of desulfurized building gypsum, Portland cement and sulphoaluminate cement, and based on the cementing material, the weight ratio of the desulfurized building gypsum to the Portland cement to the sulphoaluminate cement is (44-54): (4.9-7): (10.5-21); the aggregate is river sand. According to the invention, the later strength of the system is ensured by controlling the ratio of the desulfurized gypsum to the ordinary Portland cement, the later strength can reach more than 35 MPa, the upper limit of the strength of the existing desulfurized gypsum-based self-leveling mortar is greatly improved, meanwhile, the matrix drying shrinkage caused by doping of the Portland cement is compensated, and the volume stability of a mortar hardened body is ensured.
本发明公开了一种脱硫建筑石膏基自流平砂浆，脱硫建筑石膏基自流平砂浆由如下重量份的组分组成：胶凝材料70份，骨料30份，粉末类聚羧酸减水剂0.14～0.175份，蛋白质类缓凝剂0.245～0.315份，聚醚类粉末消泡剂0.049～0.077份，可再分散乳胶粉0.49～0.875份，羟丙基甲基纤维素醚0.042～0.07份，水33～37份；胶凝材料由脱硫建筑石膏、硅酸盐水泥及硫铝酸盐水泥组成，基于胶凝材料所述的脱硫建筑石膏、硅酸盐水泥及硫铝酸盐水泥的重量之比为44～54：4.9～7：10.5～21；骨料为河沙。本发明通过控制脱硫石膏与普通硅酸盐水泥的比例保证体系的后期强度，后期强度能达到35MPa以上，大幅提升目前脱硫石膏基自流平砂浆的强度上限，同时补偿掺入硅酸盐水泥带来的基体干燥收缩，保证砂浆硬化体的体积稳定性。
Desulfurized building gypsum-based self-leveling mortar
The invention discloses desulfurized building gypsum-based self-leveling mortar which is prepared from the following components in parts by weight: 70 parts of a cementing material, 30 parts of aggregate, 0.14 to 0.175 part of a powder polycarboxylic acid water reducing agent, 0.245 to 0.315 part of a protein retarder, 0.049 to 0.077 part of a polyether powder defoaming agent, 0.49 to 0.875 part of redispersible latex powder, 0.042 to 0.07 part of hydroxypropyl methyl cellulose ether and 33 to 37 parts of water, the cementing material is composed of desulfurized building gypsum, Portland cement and sulphoaluminate cement, and based on the cementing material, the weight ratio of the desulfurized building gypsum to the Portland cement to the sulphoaluminate cement is (44-54): (4.9-7): (10.5-21); the aggregate is river sand. According to the invention, the later strength of the system is ensured by controlling the ratio of the desulfurized gypsum to the ordinary Portland cement, the later strength can reach more than 35 MPa, the upper limit of the strength of the existing desulfurized gypsum-based self-leveling mortar is greatly improved, meanwhile, the matrix drying shrinkage caused by doping of the Portland cement is compensated, and the volume stability of a mortar hardened body is ensured.
本发明公开了一种脱硫建筑石膏基自流平砂浆，脱硫建筑石膏基自流平砂浆由如下重量份的组分组成：胶凝材料70份，骨料30份，粉末类聚羧酸减水剂0.14～0.175份，蛋白质类缓凝剂0.245～0.315份，聚醚类粉末消泡剂0.049～0.077份，可再分散乳胶粉0.49～0.875份，羟丙基甲基纤维素醚0.042～0.07份，水33～37份；胶凝材料由脱硫建筑石膏、硅酸盐水泥及硫铝酸盐水泥组成，基于胶凝材料所述的脱硫建筑石膏、硅酸盐水泥及硫铝酸盐水泥的重量之比为44～54：4.9～7：10.5～21；骨料为河沙。本发明通过控制脱硫石膏与普通硅酸盐水泥的比例保证体系的后期强度，后期强度能达到35MPa以上，大幅提升目前脱硫石膏基自流平砂浆的强度上限，同时补偿掺入硅酸盐水泥带来的基体干燥收缩，保证砂浆硬化体的体积稳定性。
Desulfurized building gypsum-based self-leveling mortar
一种脱硫建筑石膏基自流平砂浆
GU CHUNPING (Autor:in) / HUANG PIAOZHENG (Autor:in) / YANG YANG (Autor:in)
19.09.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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