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由于聚羧酸高效减水剂对泥成分的吸附作用,集料中砂石的含泥量对混凝土的性能和质量有着重大影响,不同含泥量对不同强度等级的混凝土的性能影响也不同。通过对不同强度等级的混凝土掺入不同含泥量进行相关的混凝土试验研究,结果表明:含泥量的增加对C25、C30的和易性影响不显著,C40、C50和易性随含泥量增加而变差,当含泥量超过3%时,其和易性将突然变差,且经时损失较大;含泥量的增加对C25、C30抗压强度影响不明显,C40、C50的抗压强度随含泥量的增加而逐步降低,当含泥量超过5%时,抗压强度将达不到设计要求。
Due to the effect of polycarboxylate superplasticizer on the adsorption of mud components, the clay content of aggregate in aggregate has a significant effect on the performance and quality of concrete. Different clay contents have different effects on the performance of concrete with different strength grades. The results of the concrete experiments on the concrete with different strength grades mixed with different clay contents show that the increase of the clay content has no significant effect on the workability of C25 and C30. The C40 and C50 workability varies with the clay content When the clay content is more than 3%, its workability will suddenly deteriorate and the loss over time will be greater. The increase of clay content has no obvious effect on the compressive strength of C25 and C30, but the C40 and C50 Compressive strength decreases with the increase of clay content, when the clay content exceeds 5%, the compressive strength will not meet the design requirements.