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Author(s): Du, H. and Tan, K. H.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 928-935
Total Pages: 8
Language: English

Abstract: This paper reports the experimental results on durability properties of concrete in which cement was partially replaced by recycled waste glass powder. The glass powder was finely ground to a similar particle size distribution as cement, and added at contents of 0, 15, 30, 45 and 60% by weight of the binder content. Water penetration depth, rapid chloride migration and chloride diffusion tests were carried out at 28 days to determine the durability performance. The amorphous silica in the glass could dissolve in alkaline solution and react with lime in the pore solution to form calcium silicate hydrate. This pozzolanic reaction could densify the microstructure of cement paste, particularly at the interface of aggregate particles. Therefore, the mechanical and durability properties are expected to be better provided that adequate pozzolanic reaction has reached to some extent. The test results indicate that at 28 days the pozzolanic reaction is so obvious that mixes with 15, 30 and 45% glass powder exhibited higher compressive strength than the reference mix without glass powder. The resistance of concrete to water and chloride penetration continuously increases with higher glass powder content. At 60% replacement level, the water penetration depth was reduced by 80% while the chloride migration and diffusion coefficient were reduced by 90% and 53%, respectively. Based on this study, concrete with recycled glass powder as supplementary cementitious material is sustainable because of the reduced cement content as well as the enhanced durability performance.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00

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