Test Method to Simulate the Influence of the Interface on the Concrete Carbonation Process

• 作 者: 沈奇真 潘钢华 ZHAN Huagang
• 机 构: College of Materials Science and Engineering, Southeast University,Jiangsu Key Laboratory of Constru
• 出 处: Journal of Wuhan University of Technology(Materials Science)
• 发表日期: 2016年03期
• 关键词: paste interfacial aggregate mortar porosity spray overlapped reasons compaction

A trial test method is introduced to form and magnify regular interface. Through researching on the carbonation of the magnifying interfacial transition zone(ITZ), the practical carbonation of the concrete can be simulated. Because the diffusion rate of CO_2 in the ITZ is several times greater than that in the bulk paste, the diffusion rate and direction of CO_2 will change and form a new carbonation front line. An interfacial effect zone caused by the ITZ will change the distribution of the complete carbonation zone and the partial carbonation zone. One of the important reasons for the formation of the partial carbonation zone was the existence of the interfacial effect zone. Consequently, the method mentioned in this paper provides a new way for researching on the microstructure of the cement based materials during the carbonation process.

A research test on the carbonation of the magnifying interfacial transition zone (ITZ), the practical carbonation of the concrete can be simulated. Because the diffusion rate of CO_2 in the ITZ is several times greater than that in the bulk paste, the diffusion rate and direction of CO_2 will change and form a new carbonation front line. An interfacial effect zone caused by the ITZ will change the distribution of the complete carbonation zone and the partial carbonation zone. One of the important reasons for the formation of the partial carbonation zone was the existence of the interfacial effect zone was the existence of the interfacial effect zone.