Durability Properties of Fly Ash Blended Cement Concrete in Inland Environment


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Title: Durability Properties of Fly Ash Blended Cement Concrete in Inland Environment

Author(s): Yunusa A. Alhassan and Yunus Ballim

Publication: Special Publication

Volume: 320


Appears on pages(s): 11.1-11.10

Keywords: Concrete durability; Fly ash; Pozzolans; Pore structure; Reinforced concrete; Supplementary cementitious materials

Date: 8/1/2017

A detailed investigation on the properties of concrete made with fly ash (FA) blended cement were carried out by characterizing such concrete in terms of physical and chemical composition at early-age. In addition, the effects of inland exposure condition on the durability performance of the concrete were also monitored via the carbonation depth. Concrete cubes were made using various concrete mixtures of water-binder ratios (w/b) = 0.40, 0.50, 0.60, 0.75 and binder contents = 300, 350, 400, 450 kg/m3. Concrete cube of 100 mm size were cast and cured in water for 3, 7, or 28 days, then characterized at early-ages. Companion concrete samples were exposed indoors or outdoors to undergo carbonation under natural environment. The concrete cube samples were characterized at 6, 12, 18 and 24 months of exposure in terms of carbonation depths. The results of the concrete early-age properties and medium-term durability characterisation were analyzed. The results show that, increased knowledge of concrete materials and concrete early-age properties as well as its exposure conditions were vital in durability considerations for reinforced concrete structures.