ACS新型高效减水剂的研究(2)——ACS对水泥净浆流变性质和流动性的影响  

Study on Acrylic Graft Copolymer-based High-range Water Reducing Agent for Concrete (2) ——Its Influences on Rheological Nature and Fluidity of Cement Grout

作　　者：李志莉[1] 陈克强[1] 陈永芬[1] 刘江[1] 

机构地区：[1]高分子材料工程国家重点实验室四川大学高分子研究所,成都610065

出　　处：《四川大学学报（工程科学版）》2000年第6期71-73,共3页Journal of Sichuan University (Engineering Science Edition)

摘　　要：研究了ACS对水泥净浆流变性质和流动性的影响。当ACS相对粘度 ηr 在 1.40～ 1.6 0之间时 ,添加 1%ACS的水泥净浆流动度可达 2 17mm(W/C =0 .2 9)。水泥净浆流变曲线和表观粘度的测定表明 ,ACS的加入 ,使水泥浆的屈服应力τf 和表观粘度 η大大降低 ,添加量为 1%时 ,τf 由不加时的 6 3× 10 5N/cm2 降为 2× 10 5N/cm2 ,η由不加时的 16 0× 10 5Ns/cm2 降为 2 0× 10 5Ns/cm2 。In this paper, acrylic graft copolymer based new high range water reducing agent (ACS) for concrete was prepared. Its influences on rheological nature and fluidity of cement grout were studied. The fluidity can attain as high as 217 mm ( W/C = 0.29) with 1% ACS when the relative viscosity( η r ) of copolymer solution is between 1.40 and 1.62. The analysis of rheological curves and apparent viscosity of grout showed that the yield stress ( τ f ) and apparent viscosity ( η ) of cement grout with 1% ACS can be decreased from 63 ×10 5 N/cm 2 and 160 ×10 5 N s/cm 2 to 2 ×10 5 N/cm 2 and 20 ×10 5 N s/cm 2 respectively.

关 键 词：ACS 高效减水剂 流变性质 流动性 水泥净浆 

分 类 号：TU528.042[建筑科学—建筑技术科学]