耐腐蚀空心方桩混凝土试验研究.pdfVIP

学兔兔 2014年第 2期(总第 292期 ) 混 凝 土 混 凝 土 制 品 Number 2 in 2014(Total No．292) Concrete CoNCRETE PR0DuCTS doi：10．3969~．issn．1002—3550．2014．02．037 耐腐蚀空心方桩混凝土试验研究 彭艳华，张 强 (上海中技桩业股份有限公司，上海 200434) 摘 要：设计并完成了的蒸养制度、矿物掺合料、水灰比对先张法预应力离心耐腐蚀空心方桩(以下简称耐腐蚀空心方桩)桩身 凝土强度和电通量的相关试验，得出该空心方桩桩身混凝土C60、C80的最佳配合比，并在此基础上研究了耐腐蚀空心方桩身混 凝土抗氯离子渗透、抗冻融循环、抗硫酸盐侵蚀等耐腐蚀性能。试验结果表明：C60和C80的氯离子迁移系数分别为0．9xlO m2／s 和O．6x10—12m2／s；C60、C80混凝土的抗冻等级为F350、F400；C60和C80混凝土试件经过150次干湿循环后抗压强度耐蚀系数大 于100％，抗硫酸盐等级KS150，均满足JGJ／T 193--20094混凝土耐久性检验评定标准》设计指标最高要求。 关键词：耐腐蚀空心方桩；强度；耐腐蚀性能 中图分类号：TU528．79 文献标志码： A 文章编号： 1002—3550(2014)02—0l36—04 Experimental study of corrosion resistant square piles concrete PENG Yanhua，ZHANGQiang (Shanghai Zhongji Pile Industry Co．，Ltd．，Shanghai 200434，China) Abstract： The compressive strength and chare passed of pretensioned prestressed spun corrosion resistant square piles’concrete were tested in different steam-curing system、mineral admixture and W／C，SO got the best mix ratio of C60，C80 concrete，on this basis，its resistance to sulfate attack、chloride ion penetration and freezing—thawing cycle were studied．The results showed that the chloride ion diffusion coefficient of C60 and C80 respectively were 0．9xl0一 m2／S and X10一 m2／s：the C60 and C80 concrete frost resistant grade respectively were F350．F400；the corrosion resistance coefficient ofC60 and C80 concrete specimens were higher than 100％after 150 times ofwetting-drying cycles。the sulfate resistant gradeKS150，to meet the highest requirements of JGJ／T 193