超细矿渣和超细偏高岭土对砂浆抗盐侵蚀性能的影响

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英文篇名：The effects of ultra-fine ground granulated blast-furnace slag and ultra-fine metakaolinon salt erosion resistance of mortar 作者：王学明 ; 朱梦伟 ; 袁俊 ; 魏鹏 英文作者：WANG Xue-ming;ZHU Meng-wei;YUAN Jun;WEI Peng;Northwest Electric Power Design Institute Co.Ltd.,of China Power Engineering Consulting Group; 关键词：超细矿渣 ; 超细偏高岭土 ; 砂浆 ; 硫酸盐侵蚀 ; 半浸泡 英文关键词：ultra-fine ground granulated blast-furnace slag;;ultra-fine metakaolin;;mortar;;sulfate attack;;partial soaking 中文刊名：DZXV 英文刊名：Journal of Chinese Electron Microscopy Society 机构：中国电力工程顾问集团西北电力设计院有限公司; 出版日期：2019-06-14 出版单位：电子显微学报 年：2019 期：v.38;No.203 基金：中国电力工程顾问集团科研项目(No.DG1-T02-2017) 语种：中文; 页：DZXV201903009 页数：7 CN：03 ISSN：11-2295/TN 分类号：47-53

摘要

选用超细矿渣和超细偏高岭土配制水泥砂浆,采用早期湿养护的方式分别养护至3 d和7 d,并对达到28 d龄期的所有砂浆试件分别进行标准养护和硫酸盐半浸泡实验,实验龄期为+28 d、+56 d和+90 d。分析了早期湿养护对砂浆试件抗压、抗折强度及抗硫酸盐侵蚀性能的影响。分析结果表明,掺超细矿渣和超细偏高岭土均可以增加砂浆的抗压强度,但对提升砂浆的抗折强度效果并不明显;掺超细矿渣和超细偏高岭土可有效地减小在半浸泡条件下砂浆抗折强度及抗折强度损失率对早期湿养护时间的敏感度,提高砂浆的抗硫酸盐侵蚀能力;对比而言,超细矿渣对于改善砂浆的抗硫酸盐侵蚀性能的效果不佳,其掺量不宜超过10%,且早期湿养护时间也不应低于7 d。而掺超细偏高岭土的砂浆,即使早期湿养护时间只有3 d时,也可以显著改善砂浆的抗硫酸盐侵蚀性能。
        The ultra fine GGBS( UFS) and ultra fine metakaolin( UFMK) were used to prepare cement mortars under moist curing at early ages of 3 d and 7 d. The mortar specimens were then cured under standard curing condition or sulfate partial soaking at 28 d.The experimental ages were +28 d,+56 d and +90 d. The influence of moist curing time at early ages on the compressive and flexural strengths,and the resistance to sulfate attack of mortar was investigated. The results show that the compressive strength of mortars is improved by adding UFS and UFMK. However,the improvement on the flexural strength is not obvious. Meanwhile,the flexural strength loss due to sulfate partial soaking can be effectively reduced by adding UFS and UFMK. The sensitivity of flexural strength loss rate to moist curing time was reduced and the resistance to sulfate erosion of mortar was improved. In contrast,the UFS has little effect on improving the resistance to sulfate attack of mortar. The dosage of UFS should not exceed 10% and the moist curing time should not be less than 7 d for UFS-cement mortars. However,the cement mortar with UFMK can significantly improve the resistance to sulfate attack even if the moist curing time is only 3 d.

引文

[1]陈益民,贺行洋,李永鑫,等.矿物掺合料研究进展及存在的问题[J].材料导报,2006,20(8):28-31.
    [2]吴中伟,廉慧珍.高性能混凝土[M].北京:中国铁道出版社,1998.
    [3]王志刚,李鑫,王强,等.超细矿渣对低品质水泥性能的改善效果[J].电子显微学报,2014,33(3):241-245.
    [4]孔凡龙,刘泽,张俱嘉,等.矿渣-粉煤灰基地质聚合物性能与微观结构的研究[J].电子显微学报,2016,35(3):229-234.
    [5]丁铸,洪鑫,朱继翔,等.碱激发赤泥-矿渣地聚合物水泥的研究[J].电子显微学报,2018,37(2):145-153.
    [6] NIU Q,FENG N,YANG J,et al. Effect of superfine slag powder on cement properties[J]. Cement and Concrete Research,2002,32(4):615-621.
    [7]王学兵,潘志华,沈晓冬,等.硫酸铵环境下超细矿渣粉掺量对水泥砂浆性能的影响[J].南京工业大学学报(自然科学报),2017,39(6):32-38.
    [8]蔡雷,王桂明,万惠文,等.偏高岭土对水泥砂浆抗渗性能的影响[J].中国建筑防水,2015(16):1-7.
    [9]胡曙光,覃立香.矿渣对混凝土抗硫酸盐侵蚀性的影响[J].武汉工业大学学报,1998,20(1):1-3.
    [10]梁松,莫海鸿,陈尤雯,等.掺矿渣微粉砂浆和混凝土的抗硫酸盐侵蚀性能[J].华南理工大学学报(自然科学版),2003,31(5):93-96.
    [11]韩方晖,刘仍光,阎培渝.矿渣对复合胶凝材料硬化浆体微观结构的影响[J].电子显微学报,2014,33(1):40-45.
    [12]王子嘉.偏高岭土在水泥基材料中应用的研究进展[J].硅酸盐通报,2013,32(7):1323-1329.
    [13]孙建伟,王强,陈忠辉.早期湿养护时间对用低品质水泥制备混凝土的后期性能的影响[J].硅酸盐通报,2015,34(10):2881-2886.
    [14]马昆林,龙广成,谢友均.硫酸盐半浸泡侵蚀下水泥基材料中腐蚀产物的试验研究[J].混凝土,2013(9):33-35.
    [15]国家建筑材料工业局. GB/T 17671-1999.水泥胶砂强度检验方法(ISO法)[S].北京:中国标准出版社,1999.
    [16]国家建筑材料工业局. GB 17671-1990.水泥胶砂强度检测方法[S].北京:中国标准出版社,1985.
    [17] NEHDI M L, SULEIMAN A R, SOLIMAN A M.Investigation of concrete exposed to dual sulfate attack[J]. Cement and Concrete Research,2014,64:42-53.
    [18] CHENG Y,HUANG F,LI G,et al. Test research on effects of ceramic polishing powder on carbonation and sulfate-corrosion resistance of concrete[J]. Construction and Building Materials,2014,55:440-446.