Green concrete comprising pulverized waste plasterboard, fly ash and ground granulated blast-furnace slag

Authors: K. Imamoto, F. Iso
Paper category: conference
Book title: Concrete Durability and Service Life Planning – ConcreteLife’09
Editor(s): K. Kovler
Print ISBN: 978-2-35158-074-5
e-ISBN: 978-2-35158-085-1
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 336 – 342
Total Pages: 7
Language: English

Abstract: This paper deals with the development of environment-conscious concrete (green concrete) comprising pulverized waste plasterboard (P-WPB: G), fly ash (F) and ground granulated blast-furnace slag (GGBFS: S). The fundamental properties of the F-S-G paste with regard to fluidity, drying shrinkage and compressive strength were tested, and the influence of the replacement ratio of P-WPB was investigated. The test results revealed that the strength of the F-S-G paste increases with the GGBFS content. An increase in the replacement ratio of P-WPB tends to decrease the fluidity of the F-S-G paste; however, the fly ash compensates for this decrease through a ball-bearing effect. Using the optimum proportion of the F-S-G mixture, the mechanical properties of green concrete, such as compressive strength, Young’s modulus, drying shrinkage strain and air permeability were tested; these were compared with the corresponding values obtained for the ordinary Portland cement concrete (reference concrete) normally used in Japan. The compressive strength of green concrete reached 50 N/mm2, while the shrinkage strains were similar to those of the reference. The air permeability of green concrete was considerably lower than that of the reference.

Online publication: 2012-05-16
Publication Type: full_text
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