摘要
采用混合水平正交表研究了新型外加剂对砂浆强度的影响.通过掺加不同因子及水平数的新型外加剂成型了16组水泥砂浆试件,测试了3 d和28 d龄期的强度,采用正交设计中的方差分析、试验误差等方法分析表明,高性能混凝土外加剂并不是性能最好的外加剂,不减少用水量的情况下,用高性能混凝土外加剂替代同等质量水泥后,外加剂对强度的影响并不是显著因素.掺量较少的情况下,对混凝土强度的提高不明显,掺量过大,会造成缓凝.掺加聚羧酸减水剂提高强度,高性能混凝土外加剂和减水剂之间存在交互作用.
A new type of admixtures on mortar strength was researched with mixed-level orthogonal table.Mixing a few different factors and levels of additives to form a new group of 16 specimens of cement mortar,and testing 3 d and 28 d strength of these prism specimens,then using orthogonal design analysis of variance test methods such as error analysis researched the influence of high-performance concrete admixtures on the cement mortar strength.The results showed that high-performance concrete admixtures are not the most perfect additives.Without reducing water consumption,high performance concrete admixtures with the same quality of cement replacement,the admixtures on the strength of the effect is not significant factors.In the dosage less case,the improvement is not obvious on the strength of concrete,and mixed with excessive can cause retardation.Admixture of polycarboxylate superplasticizer increases the strength.There was an interaction between high-performance concrete admixtures and water reducing agent.
出处
《河南理工大学学报（自然科学版）》
CAS
2011年第6期719-723,共5页
Journal of Henan Polytechnic University（Natural Science）
基金
河南省自然科学基金资助项目(2010A560010)
大学生科研训练计划SRTP10项目(10-3-008)
平煤建工集团科技攻关项目(H10-686)
关键词
高性能混凝土外加剂
矿井建设
正交设计
high-performance concrete admixtures
mine construction
orthogonal design
