Combination of waste plastic and coal gangue as coarse aggregates applied into concrete blended with metakaolin

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 471, P. 140732 - 140732

Published: March 9, 2025

Language: Английский

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Exploring Pore Structure Features, Crack Propagation and Failure Behavior of Fiber Reinforced Foam Tail Fill by CT Imaging and 3D Reconstruction

Minerals, Journal Year: 2025, Volume and Issue: 15(4), P. 354 - 354

Published: March 28, 2025

Fiber-reinforced foam tail fill (FRFTF) has been widely investigated in the field of foamed backfill because its high strength and toughness. However, fiber enhancement damage mechanism FRFTF still need to be further explored. The pore crack growth particle structure distribution features three kinds basalt (B), polypropylene (PP), glass (G) fibers on were porosity, fracture, sphericity, fractal dimension quantitatively probed by X-ray micro-computed tomography combined with uniaxial compression (UCS) SEM, while spatial porosity fracture was analyzed 3D reconstruction technology. Laboratory findings demonstrate that increases from 1.46% 4.74% increase content 0.3% 0.9%. This is related weak adhesion between fiber. Adding blowing agents could well enhance morphology FRFTF, reduce number principal cracks trapped within specimens, maintain structure’s integrity. relationship FRFTF’s UCS value porosity/fracture closely nature quantity fibers, overall performance best among others. As quality shifts 0.9%, specimen’s adversely correlated porosity. In current study, internal connection FRFTFs are studied microscopically. combination macro-mechanical microscopic provides a new research idea for materials during implementation fully mechanized mining technology hard rock mines.

Language: Английский

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Precalcination-modified lead-zinc tailings for supersulfated cement production: Insights into phase assemblages, microstructure, and mechanical properties

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 473, P. 141076 - 141076

Published: April 1, 2025

Language: Английский

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Porous Biochar-Assisted Aqueous Carbonation of Steel Slag as an Adsorptive Crystallization Modifier for Value-Added Cement Applications

Cement and Concrete Composites, Journal Year: 2025, Volume and Issue: unknown, P. 106002 - 106002

Published: Feb. 1, 2025

Language: Английский

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Low-Carbon Slag Concrete Design Optimization Method Considering the Coupled Effects of Formwork Stripping, Strength Progress, and Carbonation Durability

Buildings, Journal Year: 2025, Volume and Issue: 15(8), P. 1316 - 1316

Published: April 16, 2025

Partially substituting cement with slag is an efficient approach to lowering the carbon footprint of concrete. Earlier research on low-carbon concrete has primarily concentrated optimization material strength without considering coupled effects formwork stripping time, progress, and carbonation durability, which may lead risk steel reinforcement corrosion. To address this limitation, study introduces optimized design for that simultaneously accounts time durability. First, based test results, a prediction equation incorporates curing age, water-to-(cement+slag) mass ratio, slag-to-(cement+slag) ratio developed. As such, coefficients have clear physical meanings. Both increase coefficient exhibiting greater growth rate than cement. Second, evaluation concrete’s emissions per 1 MPa in reveals that, given adopting low high effectively reduces these emissions. Parameter analysis model increasing before onset depth. Furthermore, four scenarios are considered study: scenario C1 does not consider specified 30 at 28 days; C2 considers same C3 durability but requires 7 C4 also days. Through formulation constraints using genetic algorithm, appropriate mix proportions each obtained. Finally, results reveal when transitioning from C2, actual 28-day compressive rises 65.139 MPa; C3, slightly 30.122 C4, significantly 80.890 MPa. In summary, new particular, prolonging period plays crucial role optimizing mixtures.

Language: Английский

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Deterioration behavior and microevolution of limestone-calcined Hwangtoh clay cement (LC3) with wollastonite after high-temperature exposure

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 485, P. 141944 - 141944

Published: May 26, 2025

Language: Английский

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