Utilization of high-volume phosphogypsum in artificial aggregate by compaction granulation: effects of muck on physical properties, strength and leaching stability

IF 4.7 3区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Sustainable Cement-Based Materials Pub Date : 2022-11-04 DOI:10.1080/21650373.2022.2141368

Wei Chen, Z.A. Luo, Tao Sun, Peikai Tang, Dianshi Jin

引用次数: 1

Abstract

Artificial aggregate is an effective method to recycle for waste phosphogypsum (PG) in large quantity. This article proposes PG-muck artificial aggregates (PMAs) that combine PG and muck using compaction granulation to achieve high-volume utilization of PG. Varied PG and muck contents are applied to prepare PMAs, and the density, water absorption, strength, leaching stability, microstructure, and porosity of PMAs are tested. It is found that addition of muck can improve the PMA properties significantly, especially the leaching stability. Muck showed excellent immobilization capacity on contaminates in PMAs. Effects of muck addition are discussed comprehensively, and an optimized recipe for preparing PMAs is recommended.

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压实造粒法在人工骨料中利用大体积磷石膏：渣土对物理性能、强度和浸出稳定性的影响

人工骨料是回收大量磷石膏的有效方法。本文提出了PG淤泥人工骨料（PMAs），通过压实造粒将PG和淤泥结合起来，实现PG的高容量利用。采用不同的PG和淤泥含量制备PMAs，并对其密度、吸水性、强度、浸出稳定性、微观结构和孔隙率进行了测试。结果表明，添加矿渣可以显著提高PMA的性能，尤其是浸出稳定性。淤泥对PMAs中的污染物具有良好的固定化能力。综合讨论了添加淤泥的效果，并推荐了制备PMA的优化配方。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Sustainable Cement-Based Materials Multiple-

CiteScore

6.60

自引率

15.90%

发文量

期刊介绍： The Journal of Sustainable Cement-Based Materials aims to publish theoretical and applied researches on materials, products and structures that incorporate cement. The journal is a forum for discussion of research on manufacture, hydration and performance of cement-based materials; novel experimental techniques; the latest analytical and modelling methods; the examination and the diagnosis of real cement and concrete structures; and the potential for improved cement-based materials. The journal welcomes original research papers, major reviews, rapid communications and selected conference papers. The Journal of Sustainable Cement-Based Materials covers a wide range of topics within its subject category, including but are not limited to: • raw materials and manufacture of cement • mixing, rheology and hydration • admixtures • structural characteristics and performance of cement-based materials • characterisation techniques and modeling • use of fibre in cement based-materials • degradation and repair of cement-based materials • novel testing techniques and applications • waste management