外加剂与掺入石灰石粉的胶凝材料的适应性研究

该文研究了三种高效减水剂(萘系高效减水剂、聚羧酸系高效减水剂、氨萘复合减水剂)与掺入以10%等量取代水泥的石灰石粉,并分别复掺30%粉煤灰、30%矿渣、5%硅灰的胶凝体系的适应性问题。研究结果表明:掺萘系和氨萘复合减水剂的混凝土较稳定,掺聚羧酸系高效减水剂的混凝土流动度较大,经时损失较小,但泌水现象严重。复掺时适应性最好的是粉煤灰,其次是矿渣,最差的为硅灰。

Study on Compatibility Between Admixtures and Cementitious Materials with Limestone Powder

The compatibility between three kinds of superplasticizer (naphthalene superplasticizer, polycarboxylatesuperplasticizer, amino naphthalene se-ries composite water reducing agent) and finely ground limestone powder equivalent to 10%replacement of cement, andre-mixed with 30%fly ash, 30%slag, 5%silica fumeis is studied. The results indicate that the naphthalene series superplasticizer and ammonia naphthalene are more stable. The fluidity of polycarboxylatesuperplasticizeris is relatively large, and the time-loss is smaller, but the bleeding problem is serious. In the case of double mixing, fly ash is the best, followed by the slag, silica fume for the worst.