利用抛填骨料工艺提升混凝土护栏抗盐冻性能效果分析  

Analysis on the Effect of Improving the Salt-freeze Resistance of Concrete NGuardrail by Using the Technology of Scattering-filling Coarse Aggregate

作　　者：刘家宝 王立权 刘彦彦 张小帅 水中和[1] LIU Jiabao;WANG Liquan;LIU Yanyan;ZHANG Xiaoshuai;SHUI Zhonghe(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;Xingtai Road and Bridge Construction Group Co.,Ltd.,Xingtai054001,Hebei,China)

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [2]邢台路桥建设集团有限公司,河北邢台054001

出　　处：《材料导报》2023年第S01期178-181,共4页Materials Reports

基　　金：内蒙古自治区科技重大专项(20191G0086)。

摘　　要：本研究通过表观形貌、抗压强度及质量损失等方法,探究在冻融循环-氯盐侵蚀作用下抛填骨料混凝土抛填率对混凝土抗盐冻性能的影响规律。结果表明:抛填骨料工艺可有效提高混凝土的抗冻耐久性,但当抛填率超过一定程度后,对抗盐冻性能的提升作用减弱,抗压强度与抛填率存在二次函数关系。通过数值拟合的方式得到兼顾混凝土强度与抗盐冻性能的最佳抛填率为12%~14%。In this study,the influence of the replacement ratio of concrete with scattering-filling coarse aggregate on the salt-freezing resistance of concrete under the freeze-thaw cycle-chlorine salt attack was investigated by means of apparent morphology,compressive strength and mass loss.The results show that:the scattering-filling aggregate technology can effectively improve the salt-freezing durability of concrete,but when the replacement ratio exceeds a certain level,the enhancement effect on the salt-freezing resistance is weakened;there is a quadratic function between the compressive strength and the replacement ratio.The optimum replacement ratio for concrete strength and salt-freezing resistance was obtained by numerical fitting in the range of 12%—14%.

关 键 词：抛填骨料 抗盐冻性能 数值拟合 最佳抛填率 

分 类 号：TU528.064[建筑科学—建筑技术科学]