磨塘灰制备地质聚合物粘结剂的性能

IF 1.1 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY
J. Temuujin, A. Minjigmaa, U. Bayarzul, D. S. Kim, Shi-Ho Lee, H. J. Lee, C. Ruescher, K. MacKenzie
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引用次数: 20

摘要

以蒙古国达尔汗市热电站的池灰为原料,制备了碱活性材料。除石英、莫来石、赤铁矿和镁铁矿外,这种灰烬还含有约60wt%的X射线非晶材料,并且由于其大量积累,是一种危险废物,含有90-100ppm的重金属As、Pb和Cr,以及约800ppm的Sr,因此存在严重的储存问题。由收到的池灰合成的碱活性材料的抗压强度仅为3.25MPa。通过机械研磨最多30分钟来减小颗粒尺寸,使所得碱活化地质聚合物的抗压强度逐渐增加至15.4MPa。浸出试验表明,碾磨和碱处理的结合不会导致有害重金属从产品中释放出来,使其适合建筑应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Properties of geopolymer binders prepared from milled pond ash
Alkali-activated materials were prepared from pond ash from the Darkhan city (Mongolia) thermal power station. This ash contains about 60 wt % X-ray amorphous material in addition to quartz, mullite, hematite and magnesioferrite, and presents significant storage problems since it is accumulating in large amounts and is a hazardous waste, containing 90–100 ppm of the heavy metals As, Pb and Cr, and about 800 ppm Sr. Alkali-activated materials synthesized from the as-received pond ash achieved compressive strengths of only 3.25 MPa. Reduction of the particle size by mechanical milling for up to 30 min progressively increases the compressive strength of the resulting alkali-activated geopolymer up to 15.4 MPa. Leaching tests indicate that the combination of milling and alkali treatment does not cause the release of the hazardous heavy metals from the product, making it suitable for construction applications.
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来源期刊
Materiales de Construccion
Materiales de Construccion 工程技术-材料科学:综合
CiteScore
3.20
自引率
9.50%
发文量
38
审稿时长
>12 weeks
期刊介绍: Materiales de Construcción is a quarterly, scientific Journal published in English, intended for researchers, plant technicians and other professionals engaged in the area of Construction, Materials Science and Technology. Scientific articles focus mainly on: - Physics and chemistry of the formation of cement and other binders. - Cement and concrete. Components (aggregate, admixtures, additions and similar). Behaviour and properties. - Durability and corrosion of other construction materials. - Restoration and conservation of the materials in heritage monuments. - Weathering and the deterioration of construction materials. - Use of industrial waste and by-products in construction. - Manufacture and properties of other construction materials, such as: gypsum/plaster, lime%2
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