水灰比与水泥用量对混凝土Cl^-结合能力的影响  

Influence of Water-cement Ratio and Cement Content on Chloride Binding Capacity of Concrete

作　　者：翁智财[1] 余红发[2] 孙伟[3] 张金花[3] 陈浩宇[1] 

机构地区：[1]沈阳建筑大学材料科学与工程学院,沈阳110168 [2]南京航空航天大学土木工程系,南京210016 [3]东南大学材料科学与工程系,南京210096

出　　处：《武汉理工大学学报》2006年第3期47-50,共4页Journal of Wuhan University of Technology

基　　金：江苏省自然科学基金前期预研项目(BK2005216);国家"863"计划西部新材料行动项目(2003AA33X100);国家自然科学基金(5017804459938170);国家"863"计划(2002AA335020)

摘　　要：测定了混凝土颗粒样品与氯化物溶液之间的物理吸附和化学结合作用,研究了混凝土的水灰比和水泥用量对其氯离子结合能力的影响规律。结果表明:混凝土对氯离子结合的等温吸附曲线,整体上符合于Freundlich非线性吸附关系,其中,物理吸附亦服从于Freundlich非线性吸附关系,而化学结合则符合线性吸附关系,给出了氯离子结合等温吸附的相关参数。进一步进行的研究指出,水灰比一定时,混凝土的水泥用量越多,其氯离子结合能力越大;水泥用量一定时,水灰比越大,则混凝土的氯离子结合能力也就越大。The effect of concrete grain sample on chloride physical adsorption and chemical binding were tested in chloride solution, and the influenccs of water-cement ratio （w/c） and cement content on chloride binding capacity wcre studied, The experimental results showed that chloride binding isotherrns of concrete accord with Freundlich isotherm as a whole, moreover, physical adsorption aiso can be described by Freundlieh isotherm while chemical binding can be described by linear isotherm, The coefficients of chloride binding isotherms adsorption were given in the paper. Further study showed that when w/c was constant , the more cement content in the concrete, the higher of chloride binding capacity was; while the cement content was constant, the higher of w/c, the higher of chloride binding capacity was.

关 键 词：混凝土 氯离子 结合能力 化学结合 物理吸附 

分 类 号：TU528[建筑科学—建筑技术科学]