Abstract
The purpose of this study is to investigate the compressive strength properties of concrete with blast furnace slag(BFS) using wash water from recycled aggregate. When BFS comes into contact with water, it dose not have an autonomously chemical reaction but BFS becomes a latent hydraulic property when BFS comes into contact with water in alkaline environment. For that reason, if water eluted from recycled coarse aggregate use mixture water, BFS is expected to reaction of latent hydraulic property in early stage. Therefore we conducted an tests of XRD, ICP-MS, compressive strength, with the concrete made from water eluted from recycled aggregate. And then we investigate the effect of the compressive strength properties of BFS using water eluted from recycled aggregate. According to the experimentation result, ICP-MS analysis shows wash water from recycled aggregate has a high alkali-ash value of pH of 12 above. And BFS concrete using wash water from recycled aggregate shows a similar strength of plain concrete due to the latent hydraulic reaction. XRD analysis shows GBFS concrete using wash water from recycled aggregate has significantly decreased presence of calcium hydroxide.
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