Results 11 to 20 of about 549 (169)

Dust generation characteristics during the wet-mix shotcrete process in mines and the preparation of a composite dust-reducing additive [PDF]

Meitan xuebao
The dust pollution during the wet-mix shotcrete process in mines constitutes a crucial factor limiting the efficiency, cleanliness, and safety of wet-mix shotcrete support projects.
Zhongan JIANG, Mingli SI, Guoliang ZHANG, Fabin ZENG, Cong LI   +4 more
doaj   +2 more sources

Research on Pump Primers for Friction Reduction of Wet-Mix Shotcrete Based on Precreating Lubricating Layer [PDF]

Advances in Materials Science and Engineering, 2017
Wet-mix shotcrete has lower water content even though looking wet which is generally less than 8% of total content. The inner surface of pipes will absorb water from fresh concrete to wet itself if concrete pump primers is not pumped early; meanwhile ...
Guoming Liu, Lianjun Chen, Weimin Cheng, Yanan Huang   +3 more
doaj   +2 more sources

Flexural Behaviour of Reinforced Shotcrete beams Comprehending Waste Plastic Fiber

Wasit Journal of Engineering Sciences
Wet-mix shotcrete is often used as a placement method in tunnelling and ground support. However, to date, only a limited number of studies have been identified the roles of waste plastic fiber (WPF) on wet-mix shotcrete mixtures.
Yousif A. Mansoor, Amer M. Enad, Abdulkader I. Al-HAdithi   +2 more
doaj   +3 more sources

Application research on mechanical properties of wet shotcrete based on fly ash and sand ratio under rubber particles [PDF]

E3S Web of Conferences
Sustainable development is a hot topic in the world in recent years. For example, Casablanca has pioneered sustainable management methods [1], the use of solid waste in shotcrete is an important measure to alleviate the shortage of sand and gravel ...
Wu Suobo, Jin Zhengchao, Fang Guangxiu, Zhong Zhixian, Piao Xingchen   +4 more
doaj   +2 more sources

Development of a New Type of Green Switch Air Entraining Agent for Wet-Mix Shotcrete and Its Engineering Application

Advances in Materials Science and Engineering, 2016
Air entraining agent (AEA) can bring a lot of microbubbles into fresh concrete for improving its fluidity; however, high fluidity has adverse effect on the shootability of wet-mix shotcrete.
Guoming Liu, Lianjun Chen
doaj   +2 more sources

Research on Dust Suppression Technology of Shotcrete Based on New Spray Equipment and Process Optimization

Advances in Civil Engineering, 2019
In order to reduce the dust hazard of shotcrete, the paper analyzed the mechanism of dust production from the perspective of various dust sources and developed the plunger-type wet spraying machinery and wet mixer which can be applied in the small ...
Pengcheng Li, Zhi Zhou, Lianjun Chen, Guoming Liu, Wei Xiao   +4 more
doaj   +2 more sources

LABORATORY TESTS ON THE STRENGTHENING OF WET-MIX SHOTCRETE LINING WITH THE USE OF NANOMATERIALS

Rudarsko-geološko-naftni Zbornik, 2021
Adding nanomaterials to concrete extends the size range of constituent particles well into nano-scale dimensions, which could help the compacting of particles in cement-based materials.
Hamid Kalhori, Raheb Bagherpour, Mohammad Amir Akhlaghi, Sayed Mohsen Mirdamadi, Mehdi Nasiri Sarvi   +4 more
doaj   +2 more sources

On the significance of accelerator enriched layers in wet-mix shotcrete

Tunnelling and Underground Space Technology, 2023
The application process, which gives shotcrete its name is a robust and established method, dating back to the beginning of the 20th century. Since then, the spraying process has been significantly enhanced.
Marlene Sakoparnig, Isabel Galan, Wolfgang Kusterle, Benedikt Lindlar, Günther Koraimann, Thomas Angerer, Florian R. Steindl, Lukas G. Briendl, Sebastian Jehle, Johannes Flotzinger, Joachim Juhart, Florian Mittermayr   +11 more
openaire   +2 more sources

External Annular Air Curtain to Mitigate Aerosol Pollutants in Wet-Mix Shotcrete Processes

Buildings
Dust generation from wet-mix shotcrete (WMS) is a major source of aerosol pollutants in underground construction. However, research on aerosol pollutant control equipment during the WMS process is still scarce.
Kunhua Liu, Shu Wang, Zhen Guo, Longzhe Jin, Junyong Cui   +4 more
doaj   +2 more sources

Performance investigations on fluorine-rubber-tube-laying pumping wet shotcrete filled with microencapsulated phase change materials

Case Studies in Thermal Engineering
The challenge of mitigating adverse climatic conditions is a critical issue that affects worker safety and operational efficiency in underground engineering.
Yue Xiao, Bing Liu, Xuefei Han, Qifei Sun, Yu Zhang, Tenghua Gao, Wenyu Yang   +6 more
doaj   +2 more sources