Experimental Study on Measurement of Carbonation Depth of Concrete  

作　　者：李晓克 

机构地区：[1]School of Building Engineering Zhejiang University, Hangzhou 310027, China [2]School of Civil Engineering and Communication, North China University of Water Conservancy and Electric Power, Zhengzhou 450011, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2006年第z1期64-67,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by Outstanding Youth Science Foundation of Henan Province of China (No. 04120002300)

摘　　要：Based on the test results, the differences of the carbonized depth of concrete measured by phenolphthalein indicator and rainbow indicator were discussed, the effects of the water to cement ratio of concrete, the carbonized age and the relative humidity of environment on the carbonized depth of concrete and the depth of half-carbonized zone corresponding to green zone measured by rainbow indicator were also analyzed. It is proved that the depth measured by phenolphthalein indicator is always smaller than that measured by rainbow indicator, and the half-carbonized zone can only be measured by rainbow indicator. The carbonized and half-carbonized depths of concrete are influenced by the carbonation age, the water to cement ratio of concrete and the relative humidity of environment. It is suggested that the phenolphthalein indicator can be used to measure the carbonized depth of concrete when the strength grade of concrete is below C45, otherwise, the rainbow indicator should be utilized.Based on the test results, the differences of the carbonized depth of concrete measured by phenolphthalein indicator and rainbow indicator were discussed, the effects of the water to cement ratio of concrete, the carbonized age and the relative humidity of environment on the carbonized depth of concrete and the depth of half-carbonized zone corresponding to green zone measured by rainbow indicator were also analyzed. It is proved that the depth measured by phenolphthalein indicator is always smaller than that measured by rainbow indicator, and the half-carbonized zone can only be measured by rainbow indicator. The carbonized and half-carbonized depths of concrete are influenced by the carbonation age, the water to cement ratio of concrete and the relative humidity of environment. It is suggested that the phenolphthalein indicator can be used to measure the carbonized depth of concrete when the strength grade of concrete is below C45, otherwise, the rainbow indicator should be utilized.

关 键 词：concrete carbonation half-carbonized zone rainbow indicator phenolphthalein indicator  relative humidity carbonation age 

分 类 号：TU528[建筑科学—建筑技术科学]