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Preparation of artificial aggregate to be used in the asphalt mixture

Gang LiuDepartment of Civil and Environmental Engineering, Norwegian University of Science and Technology, Trondheim, NorwayMingwei DingDepartment of Civil and Environmental Engineering, Norwegian University of Science and Technology, Trondheim, NorwayHongyuan XingCenter for Advanced Technologies in UzbekistanHaoliang HuangSchool of Materials Science and Engineering, South China University of TechnologyGuzal Anvarona KasimovaHao ChenState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China

2022en

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Litsenziya: cc-by-nc-nd

ABI

Annotatsiya

Phosphogypsum (PG) is a by-product of the fertilizer industry when producing phosphoric acid from phosphate rock. Massively consuming phosphogypsum (PG) has attracted worldwide attention. This study adopted PG to prepare the artificial aggregate by the disk granulation to be used in the asphalt mixture. Morphology, strength and internal structure of the aggregate were characterized. The result indicates artificial aggregate has higher sphericity but lower angularity and texture than natural aggregate. After the 7-day curing, the aggregate strength can reach 40.8 MPa. Later on, the strength grows slowly due to the formation of large number of pores. The water absorption ratio of the aggregate can be reduced less than 2% after treated by the silicone resin at a mass ratio of 2.68%. This study offers an economical alternative for massively consuming PG and saving natural resources.

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Mavzular

Geotechnical and construction materials studies Asphalt Pavement Performance Evaluation

Identifikatorlar

DOI: 10.1201/9781003222910-37

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