Open AccessCarbonation and strength of self-compacting concrete with coal bottom ash exposed to seawater by wetting-drying cycle
Author(s) -
Ahmad Farhan Hamzah,
Mohd Haziman Wan Ibrahim,
Ernie Abd Manan
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/476/1/012032
Subject(s) - carbonation , seawater , bottom ash , wetting , compressive strength , fly ash , materials science , coal , curing (chemistry) , geotechnical engineering , metallurgy , composite material , environmental science , waste management , geology , engineering , oceanography
This experimental work presents the carbonation and strength behaviour of self-compacting concrete with coal bottom ash that was exposed to cyclic wetting-drying processes under condition of seawater environment. Six series of mix portions with 0%, 10%, 15%, 20%, 25% and 30% of coal bottom ash replacement to sand were produced. The samples arising from each mixture were exposed to seawater environment with an average of 15 hours of wetting and 9 hours of drying process per day. Thus, the carbonation and compressive strength behaviour at the durations of 28, 60, 90 and 180 days under curing process were observed. The results obtained in this study for seawater exposure has clearly indicated that the incorporation of 10% replacement of coal bottom ash to sand exhibited good result of carbonation and compressive strength.