Title:
Durability Properties of Fly Ash Blended Cement Concrete in Inland Environment
Author(s):
Yunusa A. Alhassan and Yunus Ballim
Publication:
Symposium Paper
Volume:
320
Issue:
Appears on pages(s):
11.1-11.10
Keywords:
Concrete durability; Fly ash; Pozzolans; Pore structure; Reinforced concrete; Supplementary cementitious materials
DOI:
10.14359/51701049
Date:
8/1/2017
Abstract:
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.