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采用ASTM C1202电通量法研究了矿物掺合料对自密实混凝土工作性能、强度和抗氯离子渗透性能的影响。结果表明,单掺粉煤灰时混凝土试件电通量随粉煤灰掺量的提高先减小后增加,28d龄期时粉煤灰掺量为40%的试件电通量最低,而60d龄期时粉煤灰掺量为50%的试件电通量最低;粉煤灰与矿渣复掺时,混凝土试件电通量随复合掺合料体系中粉煤灰掺量的提高先减小后增加,28d龄期时复掺比例为3:7的试件电通量最低,而60d龄期时复掺比例为5∶5的试件电通量最低;粉煤灰与硅灰复掺时,混凝土试件电通量明显降低,抗氯离子渗透性能显著提高。
The effects of mineral admixtures on the performance, strength and chloride ion permeability of self-compacting concrete were studied by ASTM C1202 flux method. The results show that the electric flux of concrete specimen increases with the increase of the content of fly ash when the fly ash is mixed, and then increases with the increase of fly ash content. The electric flux of fly ash with the fly ash content of 40% 60d age when the fly ash content of 50% of the sample electrical flux minimum; fly ash and slag complex, the concrete specimen electrical flux with the composite admixture system increased the amount of fly ash After 28 days, the electrical flux of the composite with the ratio of 3: 7 was the lowest, while the electrical flux of the composite with the ratio of 5: 5 was the lowest in the 60d, and that of fly ash and silica fume When complex doping, the electrical flux of concrete specimens is obviously reduced, and the resistance to chloride ion penetration is remarkably improved.