硅灰对混凝土耐硫酸腐蚀性能试验研究  

Experimental Research on the Corrosion Resistance of Silica Fume to Concrete

作　　者：阴琪翔 赵巍平 侯明姣 杜健民[2] 程强强[1] YIN Qi-xiang;ZHAO Wei-ping;HOU Ming-jiao;DU Jian-min;CHENG Qiang-qiang(School of Architecture and Construction,Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221116,China;School of Mechanics&Civil Engineering,China University of Mining&Technology,Xuzhou 221116,China;Department of Architecture and Chemical Engineering,Tangshan Polytechnic College,Tangshan 063299,China)

机构地区：[1]江苏建筑职业技术学院建筑建造学院,江苏徐州221116 [2]中国矿业大学力学与建筑工程学院江苏省土木工程环境灾变与结构可靠性重点实验室,江苏徐州221116 [3]唐山工业职业技术学院建筑化工系,河北唐山063299

出　　处：《混凝土与水泥制品》2021年第4期23-26,共4页China Concrete and Cement Products

基　　金：国家自然科学基金项目(51178455);国家“863”计划课题项目(2012AA06A402);唐山市科学技术研究与发展计划(第三批)项目(20150221C);徐州市重点研发计划项目(KC20199)。

摘　　要：为了探究硅灰掺量对酸性环境下混凝土耐久性的影响,以一定浓度的硫酸溶液作为腐蚀介质,研究了硅灰掺量分别为0、5%、10%和15%的混凝土试样随腐蚀时间的变化规律。结果表明:随着腐蚀时间的延长,试样均经历从“返霜”到严重破坏的过程,但硅灰的掺入能较好地保持腐蚀过程中试样的完整性;硅灰的掺入可有效减小腐蚀过程中抗压强度的损失,但其掺量的改变对试样抗压强度损失的影响并不显著;随着腐蚀时间的增加,试样质量均呈先增加后减小的变化趋势,但硅灰的掺入提升了附着物的附着速率;硅灰能有效抑制混凝土强度退化深度的增加,硅灰掺量为10%时抑制效果最明显。In order to explore the influence of silica fume content on the durability of concrete in acidic environment,sulfuric acid solution with a certain concentration was used as the corrosion medium to study the influence with silica fume content of 0,5%,10%and 15%with corrosion time.The results show that with the increase of sulfuric acid solution corrosion time,the samples show a process from“frost”to serious damage,but the addition of silica fume can ensure the integrity of the samples in the corrosion process.The addition of silica fume can effectively reduce the loss of compressive strength in the corrosion period,but the change of silica fume content has no obvious effect on the loss of compressive strength of the sample.With the increase of corrosion time,the sample has no obvious effect on the loss of compressive strength.However,the addition of silica fume can effectively inhibit the increase of concrete strength degradation depth,and the sample with 10%silica fume content is the most obvious.

关 键 词：混凝土 硅灰 硫酸溶液 抗压强度 强度退化深度 

分 类 号：TU528.01[建筑科学—建筑技术科学]