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首页> 外文期刊>Materials Characterization >Mineralogy, geochemistry and expansion testing of an alkali-reactive basalt from western Anatolia, Turkey
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Mineralogy, geochemistry and expansion testing of an alkali-reactive basalt from western Anatolia, Turkey

机译：土耳其安那托利亚西部地区的一种碱性反应玄武岩的矿物学，地球化学和膨胀测试

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In this paper, the alkali-silica reaction performance of a basalt rock from western Anatolia, Turkey is reported. It is observed that the rock causes severe gel formation in the concrete microbar test. It appears that the main source of expansion is the reactive glassy phase of the basalt matrix having approximately 70 percent of SiO_2. The study presents the microstructural characteristics of unreacted and reacted basalt aggregate by optical and electron microscopy and discusses the possible reaction mechanism. Microstructural analysis revealed that the dissolution of silica is overwhelming in the matrix of the basalt and it eventually generates four consequences: (1) Formation of alkali-silica reaction gel at the aggregate perimeter, (2) increased porosity and permeability of the basalt matrix, (3) reduction of mechanical properties of the aggregate and (4) additional gel formation within the aggregate. It is concluded that the basalt rock is highly prone to alkali-silica reaction. As an aggregate, this rock is not suitable for concrete production.
机译：本文报道了来自土耳其安那托利亚西部玄武岩岩石的碱硅反应特性。据观察，岩石在混凝土微棒试验中引起严重的凝胶形成。似乎膨胀的主要来源是玄武岩基体的反应性玻璃态相，其具有约70％的SiO_2。该研究通过光学和电子显微镜介绍了未反应和反应的玄武岩聚集体的微观结构特征，并探讨了可能的反应机理。微观结构分析表明，二氧化硅在玄武岩基质中的溶解是压倒性的，并最终产生四个后果：（1）在聚集体周缘形成碱-硅反应凝胶，（2）玄武岩基质的孔隙度和渗透率增加， （3）降低聚集体的机械性能，和（4）在聚集体内形成额外的凝胶。结论是玄武岩极易发生碱硅反应。总体而言，这种岩石不适合用于混凝土生产。

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