Cited by Effects of Calcined Coal Gangue and Carbide Slag on the Properties of Cement Paste and Mortar

Effects of Calcined Coal Gangue and Carbide Slag on the Properties of Cement Paste and Mortar DOI

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(10), P. 2242 - 2242

Published: May 12, 2025

When using supplementary cementitious materials to replace cement partially, the carbon emissions of products can be reduced, but it often leads reduced strength. This study explores application potential carbide slag (CS) and calcined coal gangue (CCG), byproducts acetylene production, partially cement. The effects these two on macroscopic properties microstructure cement-based were analyzed through systematic experiments. compressive strength, ultrasonic pulse velocity, electrical resistivity test results showed that replacing 20% with CCG did not cause significant changes in specimens. An X-ray diffraction (XRD) analysis produce additional hydration products. Scanning electron microscopy images (SEM) further revealed produces fill microscopic pores. Thermogravimetric (TG) after 28 days addition materials, calcium hydroxide (CH) CS reacts CCG, resulting consumption CS. Finally, environmental impact was assessed. It found is more favorable for reducing compared CCG. However, when considering effect replacement combining advantageous sustainable development. Overall, use demonstrated good performance promoting

Language: Английский

Effect of calcium chloride-assisted calcined coal gangue as a supplementary cementitious material (SCM) on cement strength and microstructure DOI

Huai Liu, Shuai Bai,

Heqing Gou

et al.

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 467, P. 140409 - 140409

Published: Feb. 15, 2025

Language: Английский

Citations

Experimental Study on the Mechanical Properties and Microstructural Mechanisms of Coal Gangue-Based Cementitious Materials Synergistically Activated by Desulfurization Gypsum and Lime DOI

Luyao Wang,

Qingping Wang, Jingyi Cai

et al.

Polymers, Journal Year: 2025, Volume and Issue: 17(7), P. 932 - 932

Published: March 29, 2025

Coal gangue and flue gas desulfurization gypsum (DG) are industrial by-products whose utilization is critical for sustainable development. This study explores the synergistic activation of coal using DG lime to develop eco-friendly cementitious materials. Three systems-CF (coal gangue-DG), CL gangue-lime), CFL gangue-DG-lime)-were designed investigate effects on reactivity. Unconfined compressive strength tests identified optimal dosages lime, while XRD, SEM, TGA-DTG, NMR analyses were employed characterize hydration products microstructure. The results demonstrated that calcium ions from both facilitated formation C-(A)-S-H gel, enhancing However, excessive led undesirable volume expansion due ettringite overproduction, compromising material stability. Excess forms weak Ca(OH)2 binding phases causes cracking heat, reducing durability. Thus, dosage in CF system 70%, 6%. In system, 70% 4% achieve best performance. combined use not only improved reactivity but also achieved an balance between enhancement long-term stability, offering a promising approach construction

Language: Английский

Citations

Evaluating next-gen sustainable cementitious materials: Unleashing the potential of LC3-based composites under high-temperature environments DOI