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Special cement additive for grouting and use method thereof
The invention discloses a special cement additive for grouting and a use method of the special cement additive. The special cement additive comprises the following components in percentage by weight: 80-85% of sulphoaluminate cement, 8-12% of a polyacrylamide flocculant and 5-10% of a polycarboxylate superplasticizer, the special cement additive for grouting is added into ordinary Portland cement and mixed uniformly to prepare the grouting material, and the weight ratio of the special cement additive for grouting to the mixed configuration of the special cement additive for grouting and ordinary Portland cement is set to be (1-2): (5-15). By adding the special cement additive for grouting into common cement paste, on the premise of ensuring the fluidity of the common cement paste, the setting time of the common cement paste is adjusted, the water dispersibility resistance and the setting rate of the common cement paste are improved, the pressure bleeding rate of the common cement paste is reduced, the construction period is shortened by 30% or above, and the grouting reliability is improved by 30% or above.
本发明公开了一种注浆专用水泥添加剂及其使用方法，包括按重量百分比计的以下组分：硫铝酸盐水泥80％～85％，聚丙烯酰胺絮凝剂8％～12％、以及聚羧酸减水剂5％～10％；将注浆专用水泥添加剂添加至普通硅酸盐水泥中混合均匀，配置成注浆料，其中，注浆专用水泥添加剂与普通硅酸盐水泥注浆专用水泥添加剂与普通硅酸盐水泥的混合配置的重量比设定为1～2:5～15。通过在普通水泥浆中添加本发明的注浆专用水泥添加剂，在保证普通水泥浆的流动度的前提下，调整普通水泥浆的凝结时间，提高其抗水分散性、结实率，降低普通水泥浆的压力泌水率，施工工期缩短30％以上，注浆可靠性提高30％以上。
Special cement additive for grouting and use method thereof
The invention discloses a special cement additive for grouting and a use method of the special cement additive. The special cement additive comprises the following components in percentage by weight: 80-85% of sulphoaluminate cement, 8-12% of a polyacrylamide flocculant and 5-10% of a polycarboxylate superplasticizer, the special cement additive for grouting is added into ordinary Portland cement and mixed uniformly to prepare the grouting material, and the weight ratio of the special cement additive for grouting to the mixed configuration of the special cement additive for grouting and ordinary Portland cement is set to be (1-2): (5-15). By adding the special cement additive for grouting into common cement paste, on the premise of ensuring the fluidity of the common cement paste, the setting time of the common cement paste is adjusted, the water dispersibility resistance and the setting rate of the common cement paste are improved, the pressure bleeding rate of the common cement paste is reduced, the construction period is shortened by 30% or above, and the grouting reliability is improved by 30% or above.
本发明公开了一种注浆专用水泥添加剂及其使用方法，包括按重量百分比计的以下组分：硫铝酸盐水泥80％～85％，聚丙烯酰胺絮凝剂8％～12％、以及聚羧酸减水剂5％～10％；将注浆专用水泥添加剂添加至普通硅酸盐水泥中混合均匀，配置成注浆料，其中，注浆专用水泥添加剂与普通硅酸盐水泥注浆专用水泥添加剂与普通硅酸盐水泥的混合配置的重量比设定为1～2:5～15。通过在普通水泥浆中添加本发明的注浆专用水泥添加剂，在保证普通水泥浆的流动度的前提下，调整普通水泥浆的凝结时间，提高其抗水分散性、结实率，降低普通水泥浆的压力泌水率，施工工期缩短30％以上，注浆可靠性提高30％以上。
Special cement additive for grouting and use method thereof
注浆专用水泥添加剂及其使用方法
ZHANG JICHANG (author)
2021-06-22
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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