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杂砂岩碱集料反应特征
作者:莫祥银 景颖杰 HüNGERKlaus-Jürgen 康彩荣 沈健  
单位:南京师范大学分析测试中心&江苏省生物功能材料重点实验室 Faculty for Architecture Civil Engineering and Urban Planning Brandenburg University of Technology Cottbus Cottbus 03046 Germany 南京工业大学材料科学与工程学院  
关键词:碱集料反应  砂岩  铝溶出过程  化学测试方法 
分类号:TU528.041
出版年,卷(期):页码:2008,36(10):1385-1389
DOI:
摘要:

杂砂岩集料所含的石英组分是引起碱集料反应的主要活性来源,研究该集料中的石英溶出及其在碱溶液中的行为特征,结果发现:石英颗粒尺寸和相应的硅溶出速度之间存在着一定的相关性,即:石英颗粒尺寸越小,其比表面积越大,同等条件下相应的硅溶出速度越大;石英颗粒的结构特征变化规律与杂砂岩试样本身的碱活性大小之间不存在相关性。集料中的铝主要来源于γ-Al2O3纳米相、黑云母和白云母,其对溶液中硅溶出的影响机理不同。集料中的铝溶出生成铝硅酸盐从而引起溶液中溶出硅含量的降低,砂浆或混凝土碱集料反应膨胀率的大小与溶液中所谓的"自由硅"含量有关,即"自由硅"含量越大,同等条件下的碱集料反应膨胀越大。这些相关性对于实际工程应用非常重要,由此可望建立评价杂砂岩碱活性敏感性的直接测试方法。研究还发现通过添加高铝粉可抑制碱集料反应产生的膨胀。

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The quartz constituent of greywacke is suspected to be the main causer of a damaging alkali aggregate reaction (AAR) in concrete. By studying silica dissolution of the aggregate and its behavior in an alkaline solution, it was found that a relation between the grain sizes of quartz and the silica releasing rate exists. That is, the smaller the size of the quartz particle, the larger its corre-sponding surface area, thus, the quicker the speed of silica dissolution at the same conditions. There are no relations between the characteristics of quartz and the alkali sensitivities of greywacke samples investigated. Aluminum in the aggregate comes from biotite and muscovite, but especially from a so called nano crystalline γ-Al2O3-phase. And this aluminum released affects the silica concen-tration by different mechanisms. The result is a decrease of the silica concentration in the solution caused by an aluminosilicate for-mation. The damaging process (expansions of concrete samples and mortar bars) can now be described much better as a function of so called "free" silica in the alkaline solution. The more the content of "free" silica is, the bigger the AAR expansion will be at the same conditions. Based on the mechanisms discussed, possibilities for inhibiting the AAR by addition of highly aluminum containing dusts were shown and first results were presented.

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基金项目:
江苏省自然科学基金项目(2007191SB90098);; 德意志学术交流基金(DAADSection423–China,Mongolia);; 教育部留学回国人员南京师范大学科研启动基金(2006191XLH0132)资助项目。
作者简介:
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参考文献:

[1]莫祥银,许仲梓,唐明述.国内外混凝土碱集料反应研究综述[J].材料科学与工程,2002,20(1):128–132.MO Xiangyin,XU Zhongzi,TANG Minghu.J Mater Sci Eng(in Chi-nese),2002,20(1):128–132. [2]莫祥银,俞琛捷,许仲梓,等.集料的矿物学特征及其碱活性[J].混凝土与水泥制品,2001(6):3–6.MO Xiangyin,YU Chenjie,XU Zhongzi,et al.Chin Concr Cem Prod(in Chinese),2001(6):3–6. [3]MO Xiangyin,FOURNIER Benoit.Investigation of structural proper-ties associated with alkali-silica reaction by means of macro-and mi-cro-structural analysis[J].Mater Char,2007,58(2):179–189. [4]KERRICK D M,HOOTON R D.ASR of concrete aggregate quarried from a fault zone:Results and petrographic interpretation of acceler-ated mortar bar tests[J].Cem Concr Res,1992,22:949–960. [5]SHAYAN A.Alkali reactivity of deformed granitic rocks:a case study[J].Cem Concr Res,1993,23:1229–1236. [6]GRATTAN-BELLEW P E.Microcrystalline quartz,adulatory extinc-tion and the alkali-silica reaction[A]//POOLE A B ed.Proceeding of the9th International Conference on AAR in Concrete[C],London,Conrete Society Publication,1992:383–394. [7]ZHANG X,BLACKWELL B Q,GROVES G W.The microstructures of reactive aggregates[J].Br Ceram Trans J,1990,89(1):89–92. [8]BLACKWELL B Q,PETTIFER K.Alkali-reactivity of greywacke aggregates in Maentwrog Dam(North Wales)[J].Mag Concr Res,1992,44(161):255–264. [9]THOMSON M L,GRATTAN-BELLEW P E.Anatomy of a por-phyro-blastic schist:alkali-silica reactivity[J].Eng Geo,1993,35(1/2):81–91. [10]WIGUM B J.Examination of micro structural features of Norwegian cataclastic rocks and their use for predicting alkali-reactivity in con-crete[J].Eng Geo,1995,40(3/4):195–214. [11]莫祥银,金同顺,王克宇,等.石英玻璃在不同碱性条件下的硅溶出研究[J].南京师范大学学报(工程技术版),2003,3(4):1–5.MO Xiangyin,JIN Tongshu,WANG Keyu,et al.J Nanjing Norm Univ(Eng Tech)(in Chinese),2003,3(4):1–5. [12]WAKIZAKA Y.Alkali-silica reactivity of Japanese rocks[J].Eng Geo,2000,56(1/2):211–221. [13]PREZZI M,MONTERIRO P J M,SPOSITO G,et al.The alkali-silica reaction,part1:use of the double-layer theory to explain the behavior of reaction-production[J].ACI Mater J,1997,94(1):10–17. [14]徐惠忠.活性Al2O3对碱骨料反应(ASR)的抑制与制动作用[J].建筑材料学报,2003,3(3):213–217.XU Huizhong.J Build Mater(in Chinese),2003,3(3):213–217. [15]封孝信,冯乃谦.Al2O3对碱硅酸反应的影响[J].河北理工学院学报,2005,27(2):91–94.FENG Xiaoxin,FENG Naiqian.J Hebei Inst Tech(in Chinese),2005,27(2):91–94. [16]王晓燕,封孝信,魏庆敏.煅烧铝矾土对碱–硅酸反应的影响[J].河南建材,2007(1):38–41.WANG Xiaoyan,FENG Xiaoxin,WEI Qingmin.J Henan Build Mater(in Chinese),2007(1):38–41. [17]HüNGER K J,HILL S,WOLLGAM H.Grauwacken aus der Lausitz und ihre Ver-nderungen im alkalischen Milieu von Beton[J].Forum der Forschung,2000(11):96–100. [18]HüNGER K J,WEIDMüLLER H,HILL S,et al.M-gliche kiesel-s-ure-lieferanten aus der grauwacke für eine sch-digende Alkalireak-tion[A]//Proceeding of the15th International Baustofftagung[C].Ibausil,Weimar,2003:735–744. [19]HüNGER K J,HILL S,WEIDMüLLER H,et al.The self-inhibition mechanism of certain grey-wackes[A]//TANG Mingshu,DENG Min ed,Proceeding of the12th International Conference on AAR in Con-crete[C],Beijing,2004:125–134. [20]HüNGER K J.Zum Reaktionsmechanismus pr-kambrischer Grau-wacken aus der Lausitz bei ihrer Verwendung als Gesteinsk-rnung im Beton[M].Shaker Verlag,2005. [21]DAFSTB R.Vorbeugende Ma-nahmen gegen sch-digende Alkali reaktion im Beton(Alkali-Richtlinie)[M].Deutscher Ausschuss für Stahlbeton,2001. [22]莫祥银.化学外加剂抑制碱硅酸反应的长期有效性和作用机理[D].南京:南京工业大学,2001.MO Xiangyin.Long-terin effectiveness and mechanism of lithium in inhibiting ASR(in Chinese,dissertation)Nanjing:Nanjing Univ Tech,2001. [23]LABRID J.Modelling of high pH sandstone dissolution[J].J Can Petro Tech,1991,30(6):67–74.

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