Results 11 to 20 of about 195 (142)

Pipe pressure of mining wet shot crete flowing in pipes [PDF]

E3S Web of Conferences, 2021
In order to explore the pressure change law of mining wet shotcrete in pipes, the rheological model was built based on rheology principle, and the computational formula of rheological parameters of wet shotcrete was deduced with the linear regression ...
Chen Lianjun, Jiang Xuekai, Liu Guoming, Cui Xiangfei   +3 more
doaj   +1 more source

Flow ability and Mechanical Properties of Shotcrete concrete incorporated with Waste Plastic Fibers

Iraqi Journal of Civil Engineering, 2021
Polyethylene terephthalate (PET) fiber is a green-friendly fiber that is capable of enhancing the mechanical properties of wet-mixing shotcrete. The main purpose of this study is to see how varied volumes of waste plastic fibers (WPF) affect the ...
Amer M. Enad, Abdulkader I. Al-Hadithi, Yousif A. Mansoor   +2 more
doaj   +1 more source

Rheological analysis of wet-mix shotcrete with various viscosity-modifiying admixtures

Tunnelling and Underground Space Technology, 2022
Shotcrete must be suitable for the process of transport (pumping) and application (spraying) on site. Therefore, it is necessary to obtain a suitable consistency and rheology for its placement. This paper evaluates the influence of various viscosity modifying admixtures (VMAs) on the rheology and thixotropy for application in wet-mix shotcrete.
Castellanos Castellón, Ramiro, García Alberti, Marcos, Gálvez Ruiz, Jaime Carlos, Vera Agulló, José, Pina Zapartiel, Raúl   +4 more
openaire   +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   +1 more source

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   +1 more source

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   +1 more source

Study on Modification of Alkali-Free Liquid Accelerator of Mine-Used Wet-Mix Shotcrete

Advances in Materials Science and Engineering, 2019
Compound properties of an alkali-free liquid accelerator are the mainstream of accelerator research and development in the present. Combined with the technical characteristics of wet-mix shotcrete in coal mines, organic high-polymer SWF is used to modify
Chen Lianjun, Li Pengcheng, Pan Gang, Bian Wenhui   +3 more
doaj   +1 more source

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

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   +1 more source

Role of chemical admixtures in improving wet-mix shotcrete performance for ground support [PDF]

Proceedings of the International Conference on Deep and High Stress Mining, 2017
This paper presents the results of laboratory and field experiments conducted for a major ground support operation to assess the performance of wet-mix shotcrete incorporating various chemical admixtures. The project had an alkali-silica reaction (ASR) risk due to the aggregates available in the region being reactive. Therefore, a customised mix design
Ezgi Yurdakul, Niki Jackson, Klaus-Alexander Rieder   +2 more
openaire   +1 more source

Effect of nanometer scale admixture and macro synthetic fiber on the rebound rate of wet mix shotcrete

Shuili Shuiyun Gongcheng Xuebao, 2019
Reducing the rebound rate of shotcrete can promote the efficiency of support and reduce the risks of collapse and rock burst for underground openings.
NING Fengwei, DING Jiantong, BAI Yin, YANG Sen, LEI Yingqiang   +4 more
doaj   +1 more source