欢迎来到天天文库
浏览记录
ID:32686582
大小:693.08 KB
页数:6页
时间:2019-02-14
《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
此文档下载收益归作者所有