助磨剂对水泥与减水剂相容性的影响及改善  

Effect of Grinding Aids on the Compatibility of Cement and Water Reducer and Its Improvement Methods

作　　者：赵计辉[1] 王栋民[1] 林辉[1] 廖述聪 王学光[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《科学技术与工程》2014年第33期260-265,271,共7页Science Technology and Engineering

基　　金：国家自然科学基金(50872151);高等学校博士学科点专项科研基金(20120023110011);中央高校基本科研业务费专项资金(2009KH09)资助

摘　　要：以净浆流动度作为水泥与减水剂相容性的评价指标,试验研究了多种助磨剂对水泥与萘系减水剂或聚羧酸减水剂相容性的影响规律,探讨了缓凝剂和引气剂对水泥与减水剂相容性的改善作用。结果表明,助磨剂对水泥与萘系减水剂相容性的影响较大,对水泥与聚羧酸减水剂相容性的影响较小。缓凝剂和引气剂均能改善水泥与萘系减水剂的相容性,随其掺加量的增加,改善作用逐渐增大。含缓凝剂/引气剂的复合助磨剂对水泥净浆流动度有一定的改善作用,并延缓水泥的凝结时间。含缓凝剂的复合助磨剂对水泥有增强作用,而含引气剂的复合助磨剂会降低水泥的胶砂强度。Effect of multiple frequently used grinding aids on the compatibility of cement and water reducer is evaluated by cement paste fluidity,and improvement of retarder and air-entraining agent on compatibility of cement and water reducer is discussed. The results show that the effect of grinding aids on the compatibility of cement and naphthalene superplasticizer is large,while its effect on the compatibility of cement and polycarboxylate superplasticizer. Both the retarder and air-entraining agent can improve the compatibility of cement and naphthalene superplasticizer,and the improvement is gradually significant with the increase of the dosage of retarder or air-entraining agent. The fluidity of cement paste is improved by composite grinding aids containing retarder or air-entraining agent,and the setting time of cement is delayed. The strength of cement mortar is improved by the composite grinding aids containing retarder,while the strength is reduced by the composite grinding aids containing air-entraining agent.

关 键 词：助磨剂 水泥 相容性 减水剂 净浆流动度 缓凝剂 引气剂 

分 类 号：TQ172.46[化学工程—水泥工业]