采用绝对体积法配制C60自密实混凝土,研究C60自密实混凝土工作性能、不同龄期立方体抗压强度、混凝土氯离子渗透和抗冻融循环性能.结果表明:新拌自密实混凝土流动性能满足二级自密实混凝土要求;28 d标准养护后,抗压强度达标;6 h电通量较低,抗氯离子渗透性能优良;200次冻融循环后动弹性模量损失率26.05%,低于标准规定上限,试件质量损失率1.86%,抗冻性能良好.研究结果为自密实混凝土的推广应用提供依据参考.
The C60 self-compacting concrete was designed by the absolute volume method.The workability, compressive strength at different age, chloride permeability and frost resistance were studied.The results show that the fluidity of the fresh concrete meets level 2 standard of self compacting concrete.The compressive strengths develop very well after standard curing for 28 d;The 6 h elective flux of the self compacting concrete is very low, proving the excellent chloride penetration resistance.After 200 freeze-thaw cycles ,the loss of the dynamic elastic modulus is 26.05%, smaller than the values in standard, and the mass loss ratio is less than 1.86%, proving the excellent frost-resistance properties.The results provide the references for the application of self compacting concrete.
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