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首页> 外文会议>Geopolymer binder systems >Study on the Suitability of Volcanic Amorphous Aluminosilicate Rocks (Perlite) for the Synthesis of Geopolymer-Based Concrete
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Study on the Suitability of Volcanic Amorphous Aluminosilicate Rocks (Perlite) for the Synthesis of Geopolymer-Based Concrete

机译：火山岩无定形硅铝酸盐岩（珍珠岩）在合成地基聚合物中的适用性研究

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摘要

Geopolymerization is a low-cost, low-energy-demanding, green technology that can transform a variety of silicate and aluminosilicate raw materials and industrial by-products into useful, high-added-value products. Because of their excellent mechanical properties, the use of geopolymeric materials for the replacement of traditional construction materials is gaining ground. The most commonly used raw materials for geopolymer synthesis include metakaolin, fly ash, ground granulated blast furnace slag, and their mixtures. In this work, an amorphous aluminosilicate rock (perlite) was selected as a raw material in order to determine its utility in the synthesis of new Portland cementless binders for concrete. The effect of the following synthesis parameters on the development of the mechanical properties of the geopolymeric formulations were studied: the curing conditions (t=24, 48, 72h; T=50℃, 70℃, 90℃); the water/solid mass ratio (m_w/m_s = 0.28 to 0.37); the Si/Al molar ratio (5.6 to 6.5); and the alkali content and type of alkali ion (R/Al molar ratio = 0.65 to 1.05; R= Na or K). The structural changes were identified by means of x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM), and the mechanical properties were evaluated through compressive strength measurements. The most promising formulations were used for the synthesis of mortars using standard silica sand, according to ASTM C109/109C. Also in this case, compressive strength measurements were carried out while the structure was observed using XRD, FTIR, and SEM. The present study shows that perlite is a promising raw material for geopolymer synthesis, resulting in geopolymeric pastes with compressive strengths greater than 30 MPa. In contrast to the other raw materials currently used for geopolymeri-zation, the geopolymerization of perlite requires a prolonged curing time of a total duration of 5 days at 70℃.
机译：地质聚合是一种低成本，低能耗的绿色技术，可以将各种硅酸盐和铝硅酸盐原料和工业副产品转变为有用的高附加值产品。由于其优异的机械性能，使用地聚合材料替代传统建筑材料的趋势日益普及。用于地质聚合物合成的最常用原料包括偏高岭土，粉煤灰，磨碎的高炉矿渣及其混合物。在这项工作中，选择一种无定形的铝硅酸盐岩（珍珠岩）作为原材料，以确定其在合成新型波特兰无水泥混凝土粘合剂中的实用性。研究了以下合成参数对地聚合物配方力学性能发展的影响：固化条件（t = 24、48、72h； T = 50℃，70℃，90℃）；固化条件（t = 24、48、72h； T = 50℃，70℃，90℃）。水/固体质量比（m_w / m_s = 0.28至0.37）; Si / Al摩尔比（5.6至6.5）；碱含量和碱金属离子的类型（R / Al摩尔比= 0.65至1.05； R = Na或K）。通过X射线衍射（XRD），傅立叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）识别结构变化，并通过抗压强度测量来评估机械性能。根据ASTM C109 / 109C，最有前途的配方用于使用标准硅砂合成灰浆。同样在这种情况下，在使用XRD，FTIR和SEM观察结构的同时进行了抗压强度测量。本研究表明珍珠岩是合成地质聚合物的有前途的原料，其产生的地质聚合物浆料的抗压强度大于30 MPa。与目前用于地质聚合的其他原料相比，珍珠岩的地质聚合需要在70℃下延长固化时间，总共需要5天。

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  • 来源
    《Geopolymer binder systems》|2012年|34-53|共20页
  • 会议地点 San Diego CA(US)
  • 作者

    M. Taxiarchou; D. Panias; Ch. Panagiotopoulou; A. Karalis; C. Dedeloudis;

  • 作者单位

    National Technical University of Athens, School of Mining and Metallurgical Engineering, Athens, Greece 15780;

    National Technical University of Athens, School of Mining and Metallurgical Engineering, Athens, Greece 15780;

    National Technical University of Athens, School of Mining and Metallurgical Engineering, Athens, Greece 15780;

    SB Industrial Minerals S.A., Athens, Greece 14564;

    SB Industrial Minerals S.A., Athens, Greece 14564;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    geopolymer concrete; perlite; compressive strength;

    机译：地聚合物混凝土；珍珠岩抗压强度;

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