Results 111 to 120 of about 17,530 (271)

Effect of expansive agent and internal curing agent on crack resistance of C50 silica fume wet-mix shotcrete

Advances in Mechanical Engineering, 2019
High-strength shotcrete is always needed to strengthen rock support. However, it will reversely increase the crack risk. Crack normally goes against the durability and shortens the service life of shotcrete.
Feng Wei Ning, Yue Bo Cai, Yin Bai, Bo Chen, Feng Zhang   +4 more
doaj   +1 more source

Monitoring method for the aging slope by geophysical explorations [PDF]

, 2009
This research is monitoring the ground condition inside the aging slope. The purpose of this research is to consider the value of a monitoring method with the ground evaluating system to estimate the soundness in the aging slope.
Kusumi Harushige, Nakamura Makoto, Yamamoto Tatsuru, Yamamoto Tsuyoshi, 中村 真, 山本 剛, 山本 龍, 楠見 晴重   +7 more
core   +1 more source

Optimizing Recycled Tunnel Boring Machine (TBM)-Excavated Materials as Aggregates in Shotcrete Mix Design

Buildings
Tunnel Boring Machine (TBM) excavation materials were recycled by sieving and separating particles into sizes 5–10 mm (coarse aggregates) and below 5 mm (manufactured sand) to explore their potential as aggregates in shotcrete production, with the aim of
Wei Zhang, Rusheng Hao, Zhijun Men, Jingjing He, Yong Zhang, Wei Hu   +5 more
doaj   +1 more source

Stress reduction factor characterization for highly stressed jointed rock based on tunneling data from Pakistan [PDF]

, 2017
Stress Reduction Factor (SRF) which is the most difficult parameter to characterize in Q (Tunneling Quality Index) system is targeted in this study for highly stressed jointed rock in tunneling.
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core  

A micromechanics-enhanced finite element formulation for modelling heterogeneous materials

, 2011
In the analysis of composite materials with heterogeneous microstructures, full resolution of the heterogeneities using classical numerical approaches can be computationally prohibitive.
Grassl, P., Kaczmarczyk, Ł., Novák, J., Pearce, C. J., Zeman, J.   +4 more
core   +1 more source

Experimental study on mix proportion optimization of anti-calcium dissolution shotcrete for tunnels based on response surface methodology

Underground Space
Aiming at the issue of crystallization and blockage of drainage system due to the massive calcium loss from the tunnel shotcrete, a self-designed tunnel seepage crystallization modelling system was developed.
Chongming Tian, Yueping Tong, Junyuan Zhang, Fei Ye, Guifeng Song, Yin Jiang, Meng Zhao   +6 more
doaj   +1 more source

Experimental study on the utilization of Fly ash solid waste in tunnel shotcrete materials

Energy Science & Engineering
Fly ash has emerged as a prominent solid waste in China, leading to various environmental concerns and posing a threat to the health of living organisms, including humans.
Zan Juncai, Ren Wanxing, Guo Qing
doaj   +1 more source

Effect of Mineral Admixtures on Properties of Shotcrete

Zhongwai Gonglu
To study the influence of different mineral admixtures on the properties of shotcrete, the effects of four kinds of mineral admixtures including fly ash, silica fume, metakaolin, and carbon black on the rebound rate, one-shot thickness, and compressive ...
MA Kaikai, ZHAO Feng, SUN Rongxiao, HAN Song, HU Peng, WANG Kun   +5 more
doaj   +1 more source

Ultrasound monitoring of the influence of different accelerating admixtures and cement types for shotcrete on setting and hardening behaviour [PDF]

, 2005
C.U. Grosse, Garshol, Gebler, Grosse, H.-W. Reinhardt, Herb, J. Kurz, Jolin, Lea, Maeda, Melbye, Morgan, N. De Belie, Paglia, Prudêncio, Prudêncio, Prudêncio, Rapoport, Reinhardt, Taylor, Van der Winden   +20 more
core   +1 more source

Direct Tensile Test Method for Shotcrete

Buildings
This study substantiates the need for direct tensile strength testing of shotcrete and fiber-reinforced shotcrete, rather than relying on indirect methods, to accurately reflect material performance under biaxial stress conditions when used for ...
Oleg V. Kabancev, Oleg A. Simakov
doaj   +1 more source