Results 1 to 10 of about 16,953 (236)

Influence and Mechanism of Coal Gangue Sand on the Properties and Microstructure of Shotcrete Mortar. [PDF]

Materials (Basel)
Coal gangue, a fine aggregate for the preparation of shotcrete mortar, is a cost-effective approach for the resource utilization of coal gangue. This study employed a mortar setting time tester, electronic universal testing machine, water absorption ...
Cui Y.
europepmc   +2 more sources

Experimental study and numerical simulation of the effect of different fiber types on the basic mechanical properties of shotcrete. [PDF]

Sci Rep
This study analyzed the enhancement effects and mechanisms of steel, glass, and polypropylene fibers on the mechanical properties of concrete, aiming to guide the selection of suitable fiber types and dosages for shotcrete projects.
Liu CY, Wang HQ, Liu XF, Niu MX, Wu JF.
europepmc   +2 more sources

RoBétArmé Project: Human-robot collaborative construction system for shotcrete digitization and automation through advanced perception, cognition, mobility and additive manufacturing skills. [PDF]

Open Res Eur
The importance of construction automation has grown worldwide, aiming to deliver new machineries for the automation of roads, tunnels, bridges, buildings and earth-work construction.
Kostavelis I, Nalpantidis L, Detry R, Bruyninckx H, Billard A, Christian S, Bosch M, Andronikidis K, Lund-Nielsen H, Yosefipor P, Wajid U, Tomar R, Martínez FL, Fugaroli F, Papargyriou D, Mehandjiev N, Bhullar G, Gonçalves E, Bentzen J, Essenbæk M, Cremona C, Wong M, Sanchez M, Giakoumis D, Tzovaras D.   +24 more
europepmc   +2 more sources

Influence of materials and nozzle geometry on spray and placement behavior of wet-mix shotcrete

Case Studies in Construction Materials
Shotcrete finds extensive applications in civil engineering, from repair and rehabilitation to new constructions. Nevertheless, shotcrete construction frequently suffers from placement issues, such as rebound and overshooting. These challenges can result
Xiongxin Wang, Md. Mashfiqul Islam, Qian Zhang   +2 more
doaj   +2 more sources

Assessment of mechanical behavior of sprayed concrete reinforced with waste tire textile fibers [PDF]

Scientific Reports
The primary objective of this research is to assess the mechanical properties of shotcrete or sprayed concrete reinforced with waste tire textile fibers (WTTFs).
Behzad Khosh, Hadi Atapour
doaj   +2 more sources

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

Underground Space, 2023
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   +2 more sources

The effect of basalt fiber addition on cement concrete: A review focused on basalt fiber shotcrete

Frontiers in Materials, 2022
Basalt fiber, as a natural silicate fiber, has excellent engineering performance in high and low temperature resistance, high fracture strength, toughness, shear and elastic modulus in nature.
Qianqian Liu, Pengfei Song, Lianwei Li, Yuzhong Wang, Xuhao Wang, Jian Fang   +5 more
doaj   +1 more source

Compressive Test Characteristics and Constitutive Relationship of Wet Polypropylene Macrofiber-Reinforced Shotcrete

Shock and Vibration, 2021
Shotcrete is often subject to poor ductility and cracking problems, particularly under high stresses. In order to deal with these issues, the feasibility of adding polypropylene macrofibers to shotcrete was verified.
Fenghui Li, Yunhai Cheng, Fei Wu, Chang Su, Gangwei Li   +4 more
doaj   +1 more source

Failure Mechanisms of Fibre Reinforced Shotcrete: Numerical Simulations Considering Local Variations in Thickness and Bond Strength

Nordic Concrete Research, 2022
Fibre-reinforced shotcrete is the most common support method for hard rock tunnels in the Nordic countries. The design of shotcrete is often based on empirical methods or simplified analytical equations, which neglect variations in mechanical properties ...
Sjölander Andreas, Ansell Anders
doaj   +1 more source

Mechanical Properties and Microstructure of Shotcrete under High Temperature

Applied Sciences, 2021
High temperature is recognized as one of the extreme environments in the application of shotcrete which significantly deteriorate the performance of shotcrete.
Guoming Liu, Jipeng Zhao, Zhixue Zhang, Chenglong Wang, Qianqian Xu   +4 more
doaj   +1 more source