低热水泥与减水剂的相容性研究  

Research on Compatibility of Low-heat Cement and Water Reducing Agent

作　　者：薛豪 田野 王振地[1] 

机构地区：[1]中国建筑材料科学研究总院,北京100024 [2]中国建材股份有限公司,北京100084

出　　处：《混凝土世界》2024年第5期32-35,共4页China Concrete

基　　金：“十四五”国家重点研发计划青年科学家项目(2022YFB3708701);绿色建筑材料国家重点实验室自立项目(ZA-66)。

摘　　要：本文研究了低热水泥与聚羧酸减水剂和萘系减水剂相容性的差异,并以普通硅酸盐水泥作为基准,通过流动度以及经时损失和流变性能评价了水泥与减水剂的相容性。结果表明:在低热浆体中,萘系减水剂的饱和掺量点大于聚羧酸减水剂;低热水泥展现出不弱于普通硅酸盐水泥的良好相容性,并且低热水泥与聚羧酸减水剂的适应性要好于萘系减水剂;含减水剂的低热水泥净浆的流变特性符合Bingham模型,掺入聚羧酸减水剂的低热水泥浆体呈现为典型的牛顿流体,而掺入萘系减水剂的低热水泥浆体呈现为剪切稀化流体。This paper investigates the differences in compatibility between low-heat cement,polycarboxylic acid water reducing agent,and naphthalene based water reducing agent,and evaluates the compatibility between cement and water reducing agent through fluidity,time loss,and rheological properties,using ordinary Portland cement as a comparative object.The results show that in low-heat slurries,the saturation dosage point of naphthalene based water reducing agents is higher than that of polycarboxylic acid water reducing agents;low-heat cement exhibits good compatibility with reference cement,and its adaptability to polycarboxylic acid water reducing agent is better than that of naphthalene based water reducing agent.The rheological properties of low-heat cement slurry containing water reducing agent conform to the Bingham model.The low-heat cement slurry mixed with polycarboxylic acid water reducing agent presents a typical Newtonian fluid,while the low-heat cement slurry mixed with naphthalene based water reducing agent presents a shear-thinning fluid.

关 键 词：低热水泥 聚羧酸减水剂 萘系减水剂 工作性能 流变性能 Bingham模型 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]