| Title |
An Experimental Study on the Binding Ratio of Chloride Ion in Hardened Concrete |
| Abstract |
This study is on the difference of the measured value between total chloride ion in fresh concrete and water-soluble chloride ion in hardened concrete made of same mixing concrete specimens. The mixing design of concrete is various in the chloride value and the sort of cement.The chloride contents in concrete were measured by the Mohr's method. The leaching temperature for a soluble chloride in hardened concrete is at 50 C water. The result is following.1. Concerning the ratio of chloride value between hardened concrete and fresh concrete, the reducing of fresh concrete to hardened concrete is in the range of 26.4-61.5%.2. The ratios of hardened concrete to fresh concrete are 26.4-41.5% in using normal portland cement. In the case of slag cement, they exist in 54.3-61.5%. So there are 20.0-27.9% more slag cement than normal portland cement.3. The ratios of bound salt to using cement are 0.048-0.258% in weight.4. In the case of using slag cement for concrete, the ratios of bound salt to using cement are 0.048-0.148% in wight, and 0.073-0.258% in normal portland cement. So there are 0.025-0.110% more normal portland cement than slag cement. Considering the value of chloride contents in fresh concrete, the ratios are increasing by 0.065-0.113% in the case of 600-1,500g/m3 than in the case of less han 600g/m3 of chloride in fresh concrete. |