Design, Property, and Interfacial Bonding Mechanism of a Novel Gangue-Cemented High-Porosity Backfill Material.

Qiang Guo, Meng Li, Feng Ju, Zhangjie Yin, Zhangyu Li, Zhibo Cui

Abstract read

In one paragraph

Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0citing papers in PubMed

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1 · What the graph read from it

What it found

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2 · The registry

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Qiang GuoSate Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, School of Mines, China University of Mining and Technology, Xuzhou 221116, China.

Meng LiSate Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, School of Mines, China University of Mining and Technology, Xuzhou 221116, China.

Feng JuState Key Laboratory of Intelligent Construction and Healthy Operation & Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China.

Zhangjie YinSate Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, School of Mines, China University of Mining and Technology, Xuzhou 221116, China.

Zhangyu LiSate Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, School of Mines, China University of Mining and Technology, Xuzhou 221116, China.

Zhibo CuiSate Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, School of Mines, China University of Mining and Technology, Xuzhou 221116, China.

Funding

National Natural Science Foundation of China 52130402National Natural Science Foundation of China 52474112

6 · The paper itself

Abstract

In traditional gangue backfilling mining, the use of gangue as backfill material often leads to issues such as supply-demand imbalance, low crushing efficiency, and insufficient early strength. To address these challenges, a novel gangue-cemented high-porosity backfill material (GCBM) was developed, using coal gangue (CG, 15-20 mm) as aggregates bonded with an alkali-activated modified coal gangue powder and slag-based fast-setting cementitious material (FCM). The effects of alkali equivalent on the workability and mechanical properties of FCM were investigated to determine the optimal composition. The influence of FCM proportion on the porosity and strength of GCBM was analyzed, and a strength-porosity correlation model was established. The microstructure and bonding mechanism of the interfacial transition zone (ITZ) between FCM-CG aggregates were revealed through multiple microscopic techniques. Results indicate an optimal alkali equivalent of FCM is 6%. The FCM proportion is positively correlated with the compressive and flexural strengths of GCBM, with a critical proportion of 24% at which flexural strength increased by 172% compared with 22%, reflecting enhanced interfacial bonding. Microscopic observations further show that increasing the FCM proportion optimizes the ITZ structure and promotes secondary hydration products, thereby improving interfacial bonding density and the overall mechanical performance of the backfill material.

Indexed as

backfill materialcoal ganguefast-setting cementitious materialhigh porosityinterfacial transition zone

Identifiers

PMID42738102

DOI10.3390/ma19173666

PMCPMC13567076

What OpenQuestion holds

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.