DataVXJournal of Materials in Civil EngineeringPaper
journal article·2026-11-01

Stabilized Strength Development and Enhanced Heavy Metal Solidification in Alkali-Activated MSWIFA via Biochar Incorporation

Yunfeng Pan, Shengyu Zhong, Zhenming Li, Junmin Wang, Yi Fang

Journal of Materials in Civil Engineering· Volume 38· Issue 11
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Abstract

Abstract This study employed biochar (BC) as an additive in a ternary system comprising municipal solid waste incineration fly ash (MSWIFA), slag, and BC to evaluate its effects on mechanical strength, hydration, and heavy metal immobilization. The results indicate that water washing and pyrolysis enhance FA reactivity, while the porous structure of BC promotes nucleation of hydration products, refines the pore structure, and increases the proportion of harmless pores. Compared to 3-day values, specimens with 6% BC and pyrolyzed FA exhibited increases of 11.3% in compressive strength and 23.0% in flexural strength at 56 days. Leaching of Cr, Cd, and Cu at 28 days was reduced by 17%–63%, meeting environmental standards. BC incorporation effectively mitigates strength degradation and heavy-metal leaching risks in MSWIFA-based alkali-activated materials, highlighting its role in improving durability and environmental safety.
Source: crossref · Quality: baseline

Affiliations

Zhejiang Sci-Tech Univ.

Professor, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China.

Hohai Univ.y

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