【摘 要】
：
As byproducts of iron and steel industry, blast furnace slag has been widely used as supplementary cementitious material in concrete.However, the utilization rate of steel slag is still relatively low
【机 构】
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School of metallurgical and ecological engineering, University of Science and Technology Beijing, Be
【出 处】
：
The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
As byproducts of iron and steel industry, blast furnace slag has been widely used as supplementary cementitious material in concrete.However, the utilization rate of steel slag is still relatively low and its open-air stacking occupies a lot of land.Corrosion of reinforcement is regarded as one of the most important indexes of concrete durability.This paper reports the effect of slag admixture on the corrosion of reinforcement based on the investigation of pore liquid pH, electric flux, carbonation performance of the concrete with slag admixtures, and corrosion behavior of the reinforcement under dry-wet circulation conditions.Experimental results show that concrete with Ground Granulated Blast-furnace Slag has better resistance of chloride-ion penetration and lower resistance of liquid phase alkalinity, which is harmful for steel anticorrosion.The pore liquid alkalinity of concrete with Ground Steel Slag keeps at a high level, but the density of concrete is lower due to the slower growth of concrete strength in the early period.Compared to single-doped slag, Ground Iron and Steel Slag helps the concrete maintain high pore liquid alkalinity as well as good resistance of chloride-ion penetration,which would provide a better protection to fixture within concrete.
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