Tentative to use wastes from thermal power plants for construction building materials

2nd International Conference on Sustainable Development in Civil, Urban and Transportation Engineering

地球科学;运输工程;经济学

Bui, Quoc-Bao^1 ; Phan, To-Anh-Vu^1 ; Tran, Minh-Tung^1 ; Le, Duc-Hien^1

Sustainable Developments in Civil Engineering Research Group, Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Viet Nam^1

关键词: Cement concrete;    Cement production;    Construction building;    Environmental problems;    Fly and bottom ash;    Non-load bearings;    Thermal power plants;    Uni-axial compression;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/143/1/012041/pdf
DOI  :  10.1088/1755-1315/143/1/012041

来源: IOP

【 摘 要 】

Thermal power plants (TPP) generates wastes (bottom and fly ashes) which become a serious environmental problem in Vietnam. Indeed, although in several countries fly ash can be used for cement industry, fly ash from actual TPP in Vietnam does not have enough good quality for cement production, because the fly ash treatment phase has not yet included in the generations of existing Vietnamese TPP. That is why bottom ash and fly ash purely become wastes and their evacuation is an urgent demand of the society. This paper presents an investigation using fly and bottom ashes in the manufacturing of construction materials. The main aims of this study is to reduce environmental impacts of fly and bottom ashes, and to test another non-conventional binder to replace cement in the manufacture of unburnt bricks. Several proportions of fly ash, bottom ash, cement, gravel, sand and water were tested to manufacture concretes. Then, geopolymer was prepared from the fly ash and an activator. Specimens were tested in uniaxial compressions. Results showed that the cement concrete tested had the compressive strengths which could be used for low rise constructions and the material using geopolymer could be used for non-load-bearing materials (unburnt bricks).