CORRELATION OF CONCRETE CARBONATION PROCESS UNDER NATURAL CONDITION AND HIGH CO2 CONCENTRATION ARTIFICIAL ACCELERATED CLIMATE ENVIRONMENTS
Carbonation process of concrete under natural condition and its correlation with high CO2concentration artificial accelerated carbonation are of a great concern. The pH values ofcarbonated concrete were measured, the variation of pH values was determined, and thevariations of Ca(OH)2 and CaCO3 contents in the carbonated concrete under the naturalenvironment and the high CO2 concentration accelerated climate environments weredetermined by microcosmic test methods such as DTA and X-ray diffraction. Theexperimental results showed that the overall variation trend of pH values and phasecomponent of carbonation layer of concrete under accelerated climate environments with highCO2 concentrations were the same as those under natural conditions. Therefore, thecarbonation processes of concrete were considered consistent under both conditions. Howeverthere was a difference in the length of semi-carbonation zones. The one measured under highCO2 concentration accelerated climate environments was shorter than that under naturalcondition, which was caused by the differences climate condition (temperature and relativehumidity) as well as the properties of the concrete. It is acceptable to simulate the naturalcondition by applying the high CO2 concentration artificial accelerated carbonation techniquefor the purpose of the study of carbonation process of concrete.
Yongsheng Ji Yingshu Yuan Zhongchao Tan Wenli Wang Yang Xia
School of Architecture & Civil Engineering,China University of Mining and Technology,Xuzhou,Jiangsu, School of Architecture & Civil Engineering,China University of Mining and Technology,Xuzhou,Jiangsu, Schulich School of Engineering,University of Calgary,2500 University Dr.N.W.Calgary,Alberta,Canada T
国际会议
南京
英文
495-505
2008-10-13（万方平台首次上网日期，不代表论文的发表时间）