A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Research on the Use of Fly Ash for Underground Mine Supports in Quang Ninh Coal Area
https://orcid.org/http://orcid.org/0000-0002-4792-3684
https://orcid.org/http://orcid.org/0000-0003-1091-5573
The main objective of this research is to propose an optimized proportion of the fly ash of thermal power plants used in the concrete mixture for underground mine supports in Quang Ninh coal area. Fly ash is used as a partial replacement of cement in fresh concrete for underground mine supports to reduce the cost of drift supporting and to increase the effects of the environment protection. This study also shows that the new trend in using new material to make rock/soil support in the underground mines in Vietnam. Fly ash utilization in concrete as partial replacement of cement is gaining importance day by day. Technological improvements in thermal power plant operations, as well as collection systems of fly ash, improved the quality of fly ash. For the use of fly ash in concrete, cement is replaced partially by fly ash in concrete by laboratory tests at the construction laboratory of Hanoi University of Mining and Geology (HUMG). In this experimental work, concrete mix was prepared with the replacement of fly ash by 0%,10%, 20%, 30%, and 40%.
Effect of fly ash on workability, compressive strength, and flexural strength of underground concrete are studied. To study the impact of partial replacement of cement by fly ash on the properties of concrete, experiments were conducted on different concrete mixes at the laboratory. The effectiveness of the underground mine support with the concrete insert plate in the SVP steel frame is carried by analytical methods. The comparison of drift support systems using the concrete insert plates in SVP steel frame made by fly ash and conventional support mining shows the advantages of using fly ash. From the result of this study, it can be concluded that cement replacement by fly ash is useful in lower grades of cement, such as M20. It can be stated that at 30% of the replacement of cement by fly ash, there is a considerable increase in strength properties. Incorporation of fly ash in concrete can save the coal and thermal industry disposal cost and produce a “greener” concrete for construction. With the use of mineral admixture, the cost is considerably reduced since mechanical vibrators and viscosity modifying admixtures are not required. The strength of concrete decreases with increases in the percentage of fly ash first. The utilization of fly ash gives benefits in terms of economic and technical aspects. Using support with fly ash can reduce the cost of drift support and improve the effect of environmental protection.
Research on the Use of Fly Ash for Underground Mine Supports in Quang Ninh Coal Area
https://orcid.org/http://orcid.org/0000-0002-4792-3684
https://orcid.org/http://orcid.org/0000-0003-1091-5573
The main objective of this research is to propose an optimized proportion of the fly ash of thermal power plants used in the concrete mixture for underground mine supports in Quang Ninh coal area. Fly ash is used as a partial replacement of cement in fresh concrete for underground mine supports to reduce the cost of drift supporting and to increase the effects of the environment protection. This study also shows that the new trend in using new material to make rock/soil support in the underground mines in Vietnam. Fly ash utilization in concrete as partial replacement of cement is gaining importance day by day. Technological improvements in thermal power plant operations, as well as collection systems of fly ash, improved the quality of fly ash. For the use of fly ash in concrete, cement is replaced partially by fly ash in concrete by laboratory tests at the construction laboratory of Hanoi University of Mining and Geology (HUMG). In this experimental work, concrete mix was prepared with the replacement of fly ash by 0%,10%, 20%, 30%, and 40%.
Effect of fly ash on workability, compressive strength, and flexural strength of underground concrete are studied. To study the impact of partial replacement of cement by fly ash on the properties of concrete, experiments were conducted on different concrete mixes at the laboratory. The effectiveness of the underground mine support with the concrete insert plate in the SVP steel frame is carried by analytical methods. The comparison of drift support systems using the concrete insert plates in SVP steel frame made by fly ash and conventional support mining shows the advantages of using fly ash. From the result of this study, it can be concluded that cement replacement by fly ash is useful in lower grades of cement, such as M20. It can be stated that at 30% of the replacement of cement by fly ash, there is a considerable increase in strength properties. Incorporation of fly ash in concrete can save the coal and thermal industry disposal cost and produce a “greener” concrete for construction. With the use of mineral admixture, the cost is considerably reduced since mechanical vibrators and viscosity modifying admixtures are not required. The strength of concrete decreases with increases in the percentage of fly ash first. The utilization of fly ash gives benefits in terms of economic and technical aspects. Using support with fly ash can reduce the cost of drift support and improve the effect of environmental protection.
Research on the Use of Fly Ash for Underground Mine Supports in Quang Ninh Coal Area
https://orcid.org/http://orcid.org/0000-0002-4792-3684
https://orcid.org/http://orcid.org/0000-0003-1091-5573
The main objective of this research is to propose an optimized proportion of the fly ash of thermal power plants used in the concrete mixture for underground mine supports in Quang Ninh coal area. Fly ash is used as a partial replacement of cement in fresh concrete for underground mine supports to reduce the cost of drift supporting and to increase the effects of the environment protection. This study also shows that the new trend in using new material to make rock/soil support in the underground mines in Vietnam. Fly ash utilization in concrete as partial replacement of cement is gaining importance day by day. Technological improvements in thermal power plant operations, as well as collection systems of fly ash, improved the quality of fly ash. For the use of fly ash in concrete, cement is replaced partially by fly ash in concrete by laboratory tests at the construction laboratory of Hanoi University of Mining and Geology (HUMG). In this experimental work, concrete mix was prepared with the replacement of fly ash by 0%,10%, 20%, 30%, and 40%.
Effect of fly ash on workability, compressive strength, and flexural strength of underground concrete are studied. To study the impact of partial replacement of cement by fly ash on the properties of concrete, experiments were conducted on different concrete mixes at the laboratory. The effectiveness of the underground mine support with the concrete insert plate in the SVP steel frame is carried by analytical methods. The comparison of drift support systems using the concrete insert plates in SVP steel frame made by fly ash and conventional support mining shows the advantages of using fly ash. From the result of this study, it can be concluded that cement replacement by fly ash is useful in lower grades of cement, such as M20. It can be stated that at 30% of the replacement of cement by fly ash, there is a considerable increase in strength properties. Incorporation of fly ash in concrete can save the coal and thermal industry disposal cost and produce a “greener” concrete for construction. With the use of mineral admixture, the cost is considerably reduced since mechanical vibrators and viscosity modifying admixtures are not required. The strength of concrete decreases with increases in the percentage of fly ash first. The utilization of fly ash gives benefits in terms of economic and technical aspects. Using support with fly ash can reduce the cost of drift support and improve the effect of environmental protection.
Research on the Use of Fly Ash for Underground Mine Supports in Quang Ninh Coal Area
Lecture Notes in Civil Engineering
Bui, Xuan-Nam (editor) / Lee, Changwoo (editor) / Drebenstedt, Carsten (editor) / Vo, Trong Hung (author) / Dang, Van Kien (author) / Do, Ngoc Anh (author) / Truong, Van Ha (author)
2020-10-26
19 pages
Article/Chapter (Book)
Electronic Resource
English
The 28 July 2015 rapid landslide at Ha Long City, Quang Ninh, Vietnam
| British Library Online Contents | 2017