矿物掺合料对海工自密实高性能混凝土耐久性影响

《矿物掺合料对海工自密实高性能混凝土耐久性影响》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、学兔兔www.xuetutu.com2014年第1期(总第291期)混凝土原材料及辅助物料Number1in2014(TotalNo．291)ConcreteMATERIALANDADMINICLEdoi：10．3969~．issn．1002-3550．2014．O1．016矿物掺合料对海工自密实高性能混凝土耐久性影响王成启。张悦然(中交上海三航科学研究院有限公司，上海200032)摘要：采用粉煤灰、矿渣粉、石灰石粉、硅灰等矿物掺合料，配制出海工自密实高性能混凝土，并重点开展了海工自密实高性能混凝土耐久性，包括抗氯盐侵蚀、碳化、抗冻性和电阻率。试验研究结果表明，6种海工自密实高性能混凝土具有

2、较高的抗氯盐侵蚀性能、抗碳化、抗冻性，56d的电通量小于l000C，90d的扩散系数小于1．5xlOm2／s，56d的碳化深度不大于7．5rnn]，56d抗冻性达到400次循环，56d电阻率大于50kQ·cm，表现出较高的耐久性和保护钢筋能力。关键词：粉煤灰；石灰石粉；海工自密实高性能混凝土；耐久性；电通量中图分类号：TU528．041文献标志码：A文章编号：1002—3550(2014)Ol一0056—05Efectofmineraladmixtureondurabilityofhighperformanceself-compactingconcreteformarinestructure

3、WANGChengqi，ZHANGYueran(ChinaCommunicationsShanghaiThirdHarborEngineeringScienceandTechnologyResearchInstituteCo．，Ltd．，Shanghai200032，China)Abstract：Byusingflyash，slagpowder，limestonepowder，andsilicafume，highperformanceself-compactingconcre~formarinestructurewasmixedandthedurabilityofhighperformanc

4、eself-compactingconcreteformarinestructurewasemphaticallystudied，suchasresistancetochlorideandcarbonizationandfreeze-thaw，andresistivity．Experimentalresultsshowedthattheresistancetochlorideandcarbonization，andresistivityforsixkindsofhighperformanceself-compactingconcreteformarinestructurewashigh，an

5、dchargepassedofspecimensreceivedstandardcuringfor28dayswaslessthan1000C，andchloridepenetrationcoeficientofspecimensreceivedstandardcuringfor90dayswaslessthan1．5x10一m2／s，andcarbonizationdepthofspecimensreceivedstandardcuringfor56dayswasnotmorethan7．5rnln．andthefreeze-thawcycleofspecimensreceivedstan

6、dardcuringfor56daysreaches400times．andtheresistivityofspecimensreceivedstandardcuringfor56dayswasmorethan50m‘cm．Inaword．thedurabilityofhighperformanceself-compactingconcreteformarinestructuredevelopedwashigh．Keywords：nyash；limestonepowder；highperformanceself-compactingconcreteformarinestructure；dur

7、ability；chargepassed矿物掺合料，配制海工自密实高性能混凝土，并对海工自0引言密实高性能混凝土抗氯盐侵蚀、碳化、抗冻性和电阻率等自密实混凝土比振捣混凝土的流动性更高，具有更优耐久性进行系统地研究，使研制海工自密实高性能混凝土，良的抗分离性、填充性和穿过钢筋间隙的能力[1-2]。自密实满足海洋环境以及北方抗冻等耐久性的质量要求。混凝土不仅提高混凝土施工管理水平，而且还节约了成本，1试验原材料优