Water absorption and drying shrinkage of recycled foamed aggregate concrete

Chai, Teck Jung and Tang, Hing Kwong and Koh, Heng Boon (2018) Water absorption and drying shrinkage of recycled foamed aggregate concrete. Malaysian Journal of Civil Engineering, 30 (3). pp. 466-476. ISSN 2600-9498

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Abstract

This paper presents some experimental results and discusses the used of recycled foamed aggregates as natural coarse aggregates replacement in producing concrete. The physical properties of recycled foamed aggregates concrete were investigated. The properties studied are water absorption and drying shrinkage from the concrete early ages until the periods of 56 days. The 100 mm x 100 mm cube specimen was used to study the water absorption at the age of 7, 28 and 56 days. Meanwhile, the 100 mm x 100 mm x 300 mm length prism had been casted and used for drying shrinkage test for recycled foamed aggregates concrete. The foamed aggregates was produced from crushing recycled foamed concrete blocks. It were coated with cement paste to reduce its water absorption ability during casting process. Superplasticizer was used to maintain the workability of fresh concrete with a slump vary between 50 mm to 100 mm. The physical tests were conducted on recycled foamed aggregates to determine their initial properties such as loose bulk density, sieve analysis and water absorption rate. Recycled foamed aggregate concretes were produced with varied water cement ratio. The results obtained indicated that the linear elastic relationship between water cement ratio and water absorption rate. The higher the water cement ratio of concrete specimen will obtained higher water absorption rate. Vice versa, the density is low for drying shrinkage. The water absorption decreased while drying shrinkage becomes more stabilized over curing period.

Item Type:	Article
Uncontrolled Keywords:	Recycled foamed aggregate concrete; slump; water absorption; drying shrinkage; density
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction T Technology > TH Building construction > TH1000-1725 Systems of building construction. Including fireproof construction, concrete construction
Divisions:	Faculty of Civil Engineering and Built Environment > Department of Civil Engineering : Structural and Materials Engineering
Depositing User:	UiTM Student Praktikal
Date Deposited:	22 Nov 2021 07:54
Last Modified:	22 Nov 2021 07:54
URI:	http://eprints.uthm.edu.my/id/eprint/3961

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