Developing all-solid-waste-based curing agents with net-zero emissions for engineering sediment waste stabilization

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2025-05-06 DOI:10.1016/j.resconrec.2025.108354

Zhen Qi , Jiangshan Li , Guangping Huang , Feng Zhong , Qiang Xue

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引用次数: 0

Abstract

This study developed all-solid-waste-based curing agents using industrial solid wastes—ground granulated blast-furnace slag (GGBS), carbide slag (CS), and sulfate solid wastes (electrolytic manganese residue (EMR), desulfurized-gypsum (DG), and phosphogypsum (PG))—to stabilize engineering sediment waste (ESW). Based on the simplex centroid design, three ternary curing agents (GGBS-EMR-CS (GEC), GGBS-DG-CS (GDC), and GGBS-PG-CS (GPC)) were prepared. The optimal ratios for GEC, GDC, and GPC are 60:12:28, 70:27:3, and 70:21:9, respectively. Compared to ordinary Portland cement (OPC), the unconfined compressive strength (UCS) of ESW stabilized with these curing agents increased by 78 %, 178 %, and 98 %, respectively. Sulfate components synergistically activates GGBS and CS, promoting needle-like ettringite (AFt) formation, which fills pores and enhances strength. Meanwhile, CO₂ emissions and costs were reduced up to 99 % and 73 %, respectively. This study developed all-solid-waste-based curing agents with excellent mechanical performance, low costs, and near net-zero emissions, which provided a sustainable solution for ESW stabilization.

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开发净零排放的全固体废物基固化剂用于工程沉积物废物稳定

本研究利用工业固体废物——磨碎的粒状高炉渣（GGBS）、电石渣（CS）和硫酸盐固体废物（电解锰渣（EMR）、脱硫石膏（DG）和磷石膏（PG））——开发全固体废物固化剂，以稳定工程沉积物废物（ESW）。基于单形质心设计，制备了三种三元固化剂GGBS-EMR-CS （GEC）、GGBS-DG-CS （GDC）和GGBS-PG-CS （GPC）。GEC、GDC和GPC的最佳比值分别为60:12:28、70:27:3和70:21:9。与普通硅酸盐水泥（OPC）相比，这些固化剂稳定的ESW的无侧限抗压强度（UCS）分别提高了78%、178%和98%。硫酸盐组分协同激活GGBS和CS，促进针状钙矾石（AFt）的形成，从而填充孔隙并增强强度。与此同时，二氧化碳排放量和费用分别减少了99%和73%。本研究开发的全固体废物固化剂具有优异的机械性能、低成本和接近净零排放，为ESW稳定提供了可持续的解决方案。

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.