PAS与增稠保水剂复掺对水泥净浆性能的影响

Influence of the compound of aminosulfonic acid-based superplasticzer and water-retentive and thickening admixture on cement paste properties

研究了PAS及增稠保水剂(聚醚多糖、聚丙烯酰胺)与PAS复掺对水泥浆的泌水、流动度及强度等性能的影响。研究结果表明,聚醚多糖及聚丙烯酰胺与PAS复掺能明显降低水泥浆的泌水率,提高其早期强度;由于掺聚丙烯酰胺的净浆粘度增大很快,其流动性变差;聚醚多糖与PAS复掺后浆体流动性较好且流动度经时损失较小。

The influence of the compound of water- retentive and thickening admixture and aminosulfonic acid - based superplasticzer on fresh cement paste bleeding, flowability and strength was studied by means of the fluidity and the bleeding and so on. The results show that the compound of polyacrylamide or polyether polysaccharide and aminosulfonic acid - based superplasticzer can bring down bleeding and improve the early strength. Through the compound of polyether polysaccharide and aminosulfonic acid- based superplasticzer, slump loss of cement paste is little.