碳化作用对清水混凝土表面色泽一致性的影响  

Effect of carbonation on surface color consistency of fair-faced concrete

作　　者：李刚 王鹏刚[2] 康悦 金祖权[2] 叶守杰 曹杰荣 LI Gang;WANG Peng-gang;KANG Yue;JIN Zu-quan;YE Shou-jie;CAO Jie-rong(Qingdao Metro Group Co.,Ltd.,Qingdao 266000,China;School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China)

机构地区：[1]青岛地铁集团有限公司,青岛266000 [2]青岛理工大学土木工程学院,青岛266033

出　　处：《青岛理工大学学报》2019年第4期13-18,70,共7页Journal of Qingdao University of Technology

基　　金：国家重点研发计划资助项目(2017YFB0310000);青岛地铁集团有限公司资助项目(R3-ZX-2018-11)

摘　　要：清水混凝土结构表面色差通常随着服役年限的增加而变大.基于数字图像处理技术,引入图像灰度标准差,用以表征碳化前后清水混凝土表面色差的变化情况,探究碳化对清水混凝土表面色泽一致性的影响.结果表明:用图像灰度标准差来定量描述清水混凝土表面色差具有较高的精确度.通过提高清水混凝土强度可以提高其抗碳化性能.碳化导致清水混凝土色差加大,图象灰度标准差随碳化龄期增长而增大,对其表面色泽一致性产生不利影响.The color difference of the surface of fair-faced concrete structure generally increases with the increase of service life.Based on digital image processing technology,image gray standard deviation was introduced to quantify the color difference of fair-faced concrete.And the influence of carbonation on surface color consistency of fair-faced concrete was studied.Results indicate that the accuracy of image gray standard deviation to quantify the color difference of fair-faced concrete is high.With the increase of compressive strength,the carbonation resistance of fair-faced concrete increases.Carbonation has negative effects on the color consistency of fair-faced concrete.With the increase of carbonation time,image gray standard deviation increases.

关 键 词：清水混凝土 灰度标准差 碳化系数 色泽一致性 

分 类 号：TU528[建筑科学—建筑技术科学]