矿物掺合料对C45混凝土性能影响的试验研究.pdfVIP

学兔兔 2014年第 6期(总第 296期 ) 混 凝 土 原材料及辅助物料 Number6in2014(TotalNo．296) Concrete MATERIAL AND ADMINICLE doi：10．39690．issn．1002—3550．2014．06．022 矿物掺合料对C45混凝土性能影响的试验研究 刘瑞雪，张连英。李 雁，殷惠光。宋 雷 (徐#IT程学院 土木工程学院，江苏 徐州 221018) 摘 要：对掺加粉煤灰和矿粉后混凝土性能进行了试验研究，结果表明：28 d后所有掺加矿物掺合料的混凝土强度都巳超过基 准混凝土强度，7、60 d时，单掺35％粉煤灰强度最大，28 d时单掺35％矿粉效果最佳；各矿物掺合料均能改善混凝土各龄期的抗 氯离子渗透性能，且掺量越高，抗渗性能越强，养护7d时单掺50％矿粉效果最佳，而单掺50％粉煤灰对28、60d时抗渗性能的改 善最为明显；复掺粉煤灰和矿粉并没有较单掺显现出明显的优势。 关键词：粉煤灰；矿粉；混凝土；抗压强度；渗透性能 中图分类号：TU528．041 文献标志码： A 文章编号： 1002—3550(2014)06—0075—03 Experimental research of the effect of mineral admixture on the properties of C45 concrete LIURuixue，ZHANGLianying，LIYah，YINHuiguang，SONGLei (School ofCivilEngineering，XuzhouInstitute ofTechnology，Xuzhou221018，China) Abstract： Theperformances ofconcretemixedwithflyash and slagwere studied，and results showedthat：after28 dthe strength ofall concr~e mixed with mineral admixture have exceeded the s~ength ofreference concrete．At 7 d and 60 d．tl1e strength of concrete mixed with 35％ fly ash is the highest．At 28 d，mixing with 35％ slag，the effect is the best；all mineral adm ixtures can improve the anti．chlo． ride—permeability perform ances ofconcrete in every age．And the content ofadmixture is higher，the anti．permeability perform ance is more stronger．At 7 d，the effect with 50％slag is best，but at 28 d and 60 d the anti-permeability performances improved significantly when the proportionofnyashis 50％；Thedouble—dopedofflyash and slag showedno obvious advantagethan dopedofflyash or slag only