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首页> 外文会议>The Fifth International Conference on Waste Management and Technology. >The Preparation of Slag Cementitious Materials and Its Application in Cemented Paste Backfill
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The Preparation of Slag Cementitious Materials and Its Application in Cemented Paste Backfill

机译：矿渣胶凝材料的制备及其在胶泥回填中的应用

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摘要

Cemented paste backfill technology has become a common practice in China and around the world. Tailings are solidified by slag cementitious materials, which can not only reuse industrial wastes, but also save cement. The aim of this research is to prepare slag cementitious materials in order to solidify two different tailings instead of cement as binder reagent. A series of laboratory experimental results showed that the solidification effect of slag cementitious materials was better than that of cement. The unconfined compressive strength of tailings samples with 5wt.% slag cementitious materials after curing for 28 days reached 2.0MPa and 1.8MPa, respectively, which were higher than samples with 10wt.% cement. The hydration products of slag cementitious materials were characterized by X-ray diffraction (XRD) and thermogravimetrydifferential scanning claorimetry (TG-DSC). The results showed that the main hydration products were calcium silicate hydrate gel (C-S-H), ettringite (AFt), calcium and silicate hydroxide (Ca5(SiO4)2(OH)2). It was found that slag cementitious material was a finer binder for tailings paste backfill.
机译：胶浆回填技术已成为中国乃至全球的普遍做法。尾矿由矿渣胶结材料固化，不仅可以再利用工业废料，而且可以节省水泥。这项研究的目的是制备矿渣水泥质材料，以固化两种不同的尾矿，而不是用水泥作为粘结剂。一系列的室内实验结果表明，矿渣胶凝材料的固化效果要好于水泥。尾矿水泥质含量为5wt。％的尾矿样品固化28天后的无侧限抗压强度分别达到2.0MPa和1.8MPa，高于水泥含量为10wt。％的尾矿样品。用X射线衍射（XRD）和热重差示扫描量热法（TG-DSC）对矿渣胶凝材料的水合产物进行表征。结果表明，主要水合产物为硅酸钙水合物凝胶（C-S-H），钙矾石（AFt），钙和硅酸氢氧化物（Ca5（SiO4）2（OH）2）。发现矿渣胶凝材料是用于尾矿浆回填的更细的粘合剂。

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