SAC海砂混凝土在不同硫酸类型下的劣化研究三改.doc

不同硫酸类型对SAC海砂混凝土的劣化影响研究 季韬，林旭健，林魁 （福州大学土木工程学院，福建 福州 350116） 摘要：生物硫酸对混凝土的侵蚀作用远大于化学硫酸。为研究不同硫酸类型对混凝土的劣化影响，本文使用硫铝酸盐水泥（SAC）制备海砂混凝土，采用T.t细菌（氧化硫硫杆菌）模拟生物硫酸腐蚀（pH=1.0）并以化学硫酸作对比，测试质量、强度、腐蚀层pH值、固化率变化及孔结构变化评价腐蚀过程中SAC海砂混凝土的劣化程度，分析SAC海砂混凝土在生物硫酸腐蚀下的劣化影响。 关键字：SAC，硫酸，海砂，劣化 Study on SAC sea sand concrete degradation mechanism by different type of sulfuric acid Tao Ji,Xu Jian Lin, Kui Lin (College of Civil Engineering，Fuzhou University，Fuzhou，Fujian 350108) Abstract：erosion effect to concrete by biological sulfate is much higher than Chemical sulfuric acid. For the research of different types of sulfate to effect ofconcrete degradation,This topic uses T.t bacteria (thiobacillus thiooxidans)?to simulate the biological sulfate corrosion test with comparing chemical sulfuric acid and using three kinds of sulphuric acid concentration(pH=1.0)to study the?influence?rules?of SAC sea sand concrete on the performance variation under biological sulfate corrosion. The experiment evaluates the corrosion degree of samples during the corrosion process based on quality、strength、pH of corrosion layer and changes of chloride ion binding rate and change of pore structure evaluate the degradation degree of SAC sea sand concrete in the process of corrosion, and analyst degradation influence of SAC sea sand concrete under the biological sulfate corrosion . Keywords:SAC, biological sulfuric acid,sea sand, degradation 引言 生物硫酸腐蚀，是指微生物产生的硫酸对混凝土表面的破坏，使混凝土表层疏松、砂浆脱落，产生开裂和最终的钢筋锈蚀，缩短混凝土构件的使用寿命，影响设施的整体功能，并带来严重的经济损失 ADDIN EN.CITE EndNoteCiteAuthor张小伟/AuthorYear2006/YearRecNum48/RecNumDisplayTextstyle face=superscript[1]/style/DisplayTextrecordrec-number48/rec-numberforeign-keyskey app=EN db-id=9p9veevs6sdr98ewzpdvzttcws0eddvw0f0r48/key/foreign-keysref-type name=Journal Article17/ref-typecontributorsauthorsauthor张小伟/authorauthor张雄/author/authors/contributorstitlestitle混凝土微生物腐蚀的作用机制和研究方法/titlesecondary-title建筑材料学报/secondary-title/titlesperiodicalfull-title建筑材料学报/full-title/periodicalpages52-58/pagesvolume9/volumenumb