Results 181 to 190 of about 17,530 (271)

Reducing Calcium Dissolution in Tunnel Shotcrete: The Impact of Admixtures on Shotcrete Performance

Langmuir
Groundwater infiltration into tunnels causes water to percolate through the fissure channels in the initial support shotcrete. This results in the dissolution and outflow of calcium hydroxide, a key product of cement hydration. This process significantly incurs the formation of crystallization blockages in the tunnel drainage systems.
Yueping Tong, Chongming Tian, Fei Ye, Yin Jiang, Junyuan Zhang, Xingbo Han   +5 more
openaire   +3 more sources

Accelerators for shotcrete – Chemical composition and their effects on hydration, microstructure and properties of cement-based materials

, 2021
Accelerators are widely used in shotcrete to achieve rapid setting and hardening properties. This paper reviews different chemicals of accelerators and discusses their effects on hydration, microstructure and properties of cement-based materials ...
Yifei Wang, C. Shi, Yihan Ma, Yuchong Xiao, Yi Liu   +4 more
semanticscholar   +1 more source

Effect of fine aggregate on fluidity and mechanical strengths of wet shotcrete

Advances in Cement Research, 2023
Air entrained wet shotcrete improves the pipeline transportation efficiency of concrete, besides, the characteristics of fine aggregate have different effects on the fluidity and mechanical properties of air entrained wet shotcrete. In this paper, mainly
Lianjun Chen, Jiahao Sun, Guoming Liu, Chunkui Li   +3 more
semanticscholar   +1 more source

Influence of process parameters on the interlayer bond strength of concrete elements additive manufactured by Shotcrete 3D Printing (SC3DP)

Cement and Concrete Research, 2020
Shotcrete 3D Printing (SC3DP) is a novel robot-guided AM technology developed at Technische Universitat Braunschweig in the environment of the Digital Building Fabrication Laboratory (DBFL).
H. Kloft, H. Krauss, N. Hack, E. Herrmann, S. Neudecker, P. Varady, D. Lowke   +6 more
semanticscholar   +1 more source

A study on the sulfate erosion deterioration law and damage model of shotcrete in high geothermal tunnels

Structural Concrete
When building a tunnel in an environment rich in high‐temperature hot water, it is particularly necessary to pay attention to the influence of sulfate ions in underground hot water on tunnel shotcrete.
Jianjun Tong, Lulu Xiang, Yanshan Cai, Mingnian Wang, Pei Ye, Xingwang Miao   +5 more
semanticscholar   +1 more source

Toward shotcrete process simulation to support robotic operation

Proceedings of the International Symposium on Automation and Robotics in Construction (IAARC)
- In this study, we introduce a detailed physics-based particle system for simulation of the shotcrete process. The devel-opmentofthisframeworkconceptisinformedbyanextensive literature review encompassing diverse modeling and simulation methodologies ...
Mohammad Reza Yazdi Samadi, R. Waspe, Christian Schlette   +2 more
semanticscholar   +1 more source

Effect of Fluoride in Alkali-Free Liquid Accelerator on Corrosion of Reinforced Shotcrete by Chloride Ion.

Langmuir
Shotcrete is a crucial component of tunnel engineering. To investigate the impact of fluoride-containing alkali-free liquid accelerators on the structural safety of shotcrete, this study prepared shotcrete using three different fluoride-based alkali-free
Yike Lin, Tingshu He, Yongqi Da, Xiaodong Ma, Z. Wan, Renhe Yang, Qiheng Qu   +6 more
semanticscholar   +1 more source

Shotcrete

2022
Júlio Appleton, António Costa, Julien Mercier, Ivica Zivanovic   +3 more
openaire   +2 more sources

Determination of Stiffness of Circumferential Yielding Lining Considering the Shotcrete Hardening Property

Rock Mechanics and Rock Engineering, 2023
Kui Wu, Z. Shao, Yalong Jiang, Nannan Zhao, S. Qin, Zhaofei Chu   +5 more
semanticscholar   +1 more source