摘要
测定硬化混凝土的水泥用量,能够为混凝土强度不足导致的事故原因分析、配合比评价、混凝土质量控制及混凝土耐久性诊断方面能够提供有价值的数据。采用葡萄糖酸钠及马来酸溶解法测定水泥用量分别为200、300、400、500 kg/m3以及添加35%粉煤灰、20%粉煤灰+15%矿渣、35%矿渣粉的硬化混凝土,测得的水泥用量结果表明:2种方法测定的单位水泥用量均与实际的配合比设计值大部分较为接近,5次测定结果与设计值的最大相对偏差在±10%内,掺加粉煤灰对测定的水泥用量影响较小,掺加矿渣粉则使结果偏大。用于实际工程的混凝土中水泥用量的测定时,为增加可靠性应采用多种方法进行补充或验证。
The determination of unit cement content in hardened concrete can provide valuable data for the accident reason judgment result of concrete intensity reduction, mixture ratio review, and concrete quality control or estimation of concrete durability.The method for the determination of cement content in hardened concrete lunlps of cement contents respectively 200,300,400,500 kg/m3 and addition to 35% fly ash,20%fly ash ＋15% slag and 35% slag was proceed by cement dissolving in sodium gluconate and maleic solutions.The results indicated that the measured cement contents by two methods mostly approximated to actual design values and the relative deviation of measured cement contents were less than 10%.The addition of fly ash has less affected on measured results but the higher results appeared in virtue of adding slag.For improving the reliability of the cement content determination in actual concrete, varied methods should be used to modify and confirm.
出处
《混凝土》
CAS
CSCD
北大核心
2013年第6期145-148,共4页
Concrete
