Experimental Study on the Mechanical Properties of Cracked Limestone Reinforced by Modified Cement Grouting DOI Open Access

Dong Zhu,

Yijiang Zong,

Chen Min

et al.

Processes, Journal Year: 2025, Volume and Issue: 13(4), P. 1205 - 1205

Published: April 16, 2025

Grouting reinforcement is a pivotal approach to enhancing the integrity and load-bearing capacity of fractures in surrounding rock. In this study, standard limestone specimens were fractured through uniaxial compression. Then, reinforced with grouting, using ultrafine cement paste containing varying mass fractions enhancers grouting apparatus developed by authors. After cured under conditions for 28 days, CT scanning technology was used investigate microstructure effect characteristics grouted bodies different from mesoscopic perspective. compression tests conducted on those specimens. The experimental results revealed that content enhancer significantly affected post-peak characteristics, mechanical parameters, failure modes When increased 2.50 wt.% 15.00 wt.%, compressive strength exhibited positive correlation content, maximum improvement rate reaching 18.10% compared residual strength. However, when ranged 20.00 negatively correlated content. At an overall stability optimal, all parameters their values. Utilizing three-dimensional reconstruction technology, it observed less than cracks concentrated matrix rather solid edge regions whole specimens, exceeded matrix. Conversely, greater 17.50 predominantly distributed within fissures while internal lower volume fraction solid. scenario, fissures.

Language: Английский

Experimental Study on the Mechanical Properties of Cracked Limestone Reinforced by Modified Cement Grouting DOI Open Access

Dong Zhu,

Yijiang Zong,

Chen Min

et al.

Processes, Journal Year: 2025, Volume and Issue: 13(4), P. 1205 - 1205

Published: April 16, 2025

Grouting reinforcement is a pivotal approach to enhancing the integrity and load-bearing capacity of fractures in surrounding rock. In this study, standard limestone specimens were fractured through uniaxial compression. Then, reinforced with grouting, using ultrafine cement paste containing varying mass fractions enhancers grouting apparatus developed by authors. After cured under conditions for 28 days, CT scanning technology was used investigate microstructure effect characteristics grouted bodies different from mesoscopic perspective. compression tests conducted on those specimens. The experimental results revealed that content enhancer significantly affected post-peak characteristics, mechanical parameters, failure modes When increased 2.50 wt.% 15.00 wt.%, compressive strength exhibited positive correlation content, maximum improvement rate reaching 18.10% compared residual strength. However, when ranged 20.00 negatively correlated content. At an overall stability optimal, all parameters their values. Utilizing three-dimensional reconstruction technology, it observed less than cracks concentrated matrix rather solid edge regions whole specimens, exceeded matrix. Conversely, greater 17.50 predominantly distributed within fissures while internal lower volume fraction solid. scenario, fissures.

Language: Английский

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