盐蚀-冻融循环作用对普通混凝土的抗盐冻耐久性影响研究  

Study on the Influence of Salt Erosion-freeze-thaw Cycle on the Durability of Ordinary Concrete Against Salt and Freeze

作　　者：尹斌[1,2] YIN Bin(Shandong Transport Vocational College,Weifang Shandong 261206;Teaching and Research Laboratory of Highway Engineering Materials for Transportation Industry in Shandong Province,Weifang Shandong 261206)

机构地区：[1]山东交通职业学院,山东潍坊261206 [2]山东省交通运输行业公路工程材料教学研究实验室,山东潍坊261206

出　　处：《河南科技》2021年第20期102-105,共4页Henan Science and Technology

基　　金：2020年潍坊市科学技术发展计划项目“基于海洋战略下的滨海地区混凝土抗盐冻性能研究”(2020GX077);2021年西藏自治区自然科学基金项目“高原地区结构物普通水泥混凝土抗冻性能研究与应用”。

摘　　要：受盐类侵蚀和冻融交替作用影响,普通混凝土结构会出现表面剥落、破坏等问题,进而引起混凝土性能劣化,威胁混凝土建筑物结构安全。以山东省潍坊滨海地区盐渍土为例,通过取土分析盐渍化土壤中的盐分种类及含量,制备4种盐溶液,包括复合盐溶液、硫酸盐溶液、氯盐溶液、碳酸氯盐溶液。以混凝土试件质量损失和相对动弹性模量为指标,深入分析盐蚀-冻融循环作用对普通混凝土抗盐冻耐久性的影响,并综合运用电镜扫描和能谱分析研究普通混凝土抗盐冻耐久性破坏的机理,以期为相关研究提供有益的参考。Affected by salt erosion and alternate freezing and thawing,ordinary concrete structures will have problems such as surface spalling and damage,which will cause concrete performance degradation and threaten the safety of concrete building structures.This paper takes the saline soil in the coastal area of Weifang,Shandong Province as an example,and analyzes the types and content of salt in the saline soil through borrowing,and prepares 4 kinds of salt solutions,including composite salt solution,sulfate solution,chloride salt solution and chloride salt solution,and takes the mass loss of concrete specimens and the relative dynamic modulus of elasticity as indicators to deeply analyze the influence of salt erosion-freeze-thaw cycles on the durability of ordinary concrete against salt and freeze,and comprehensively uses electron microscope scanning and energy spectrum analysis to study the mechanism of ordinary concrete’s anti-salt and freeze durability damage,hoping to provide a useful reference for related research.

关 键 词：盐蚀 冻融 混凝土 抗盐冻耐久性 

分 类 号：TU528.0[建筑科学—建筑技术科学]