冻融循环和硫酸盐侵蚀作用下混凝土碳化性能研究  

Carbonation performance of concrete under freeze-thaw cycle and sulfate erosion

作　　者：杨千葶 刘明[1] 王志强 YANG Qianting;LIU Ming;WANG Zhiqiang(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China;College of Electrical Engineering,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]华北理工大学电气工程学院,河北唐山063210

出　　处：《混凝土》2025年第2期69-73,共5页Concrete

基　　金：辽宁省重点研发指导计划(2019JH8/10100101)。

摘　　要：为研究冻融循环和硫酸盐侵蚀作用下混凝土的碳化性能,分别通过单一碳化试验、碳化冻融交替循环试验以及碳化、冻融和硫酸盐侵蚀试验,分析其对混凝土碳化性能的影响机理和演变规律,建立碳化、冻融循环和硫酸盐侵蚀共同作用下碳化深度预测模型,并采用粒子群优化算法实现参数优化。结果表明:混凝土碳化深度与水胶比、粉煤灰掺量、聚丙烯纤维掺量、硫酸盐溶液质量分数及交替循环次数有关,在冻融先发生的情况下对混凝土的碳化性能影响更为严重,可为考虑碳化、冻融循环和硫酸盐侵蚀共同作用下混凝土工程的设计提供参考。To investigate the carbonation performance of concrete under freeze-thaw cycles and sulfate attack,tests of the single carbonation,carbonation freeze-thaw alternating cycle,and the combined tests of carbonation,freeze-thaw,and sulfate attack are conducted to analyze the impact mechanism and evolution law for the concrete carbonation performance.A carbonation depth prediction model for the combined action of carbonation,freeze-thaw,and sulfate attack is established,and the parameters are optimized by the particle swarm optimization algorithm.The research result shows that the carbonation depth of concrete is related to the water cement ratio,fly ash content,polypropylene fiber content,sulfate solution mass fraction,and number of alternating cycles.Moreover,it is more serious for the carbonation performance of concrete when freeze-thaw occurs first,which can provide reference for the design of concrete engineering considering the combined action of carbonation,freeze-thaw,and sulfate attack.

关 键 词：冻融循环 硫酸盐侵蚀 交替作用 碳化深度预测模型 粒子群优化算法 

分 类 号：TU528.01[建筑科学—建筑技术科学]