The effect of bottom ash on fresh characteristic, compressive strength and water absorption of self-compacting concrete
Bottom ash is a solid residue produced through combustion process in a coal-fired power plant. It has been catogarized as a waste and usually disposed in the utility disposed site. With higher demand on the power energy, more coal-power plant are constructed and abundance of bottom ash are produced....
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Trans Tech Publications Inc
2014
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| நிகழà¯à®¨à®¿à®²à¯ˆ அணà¯à®•à®²à¯: | http://dx.doi.org/10.4028/www.scientific.net/AMM.660.145 http://dx.doi.org/10.4028/www.scientific.net/AMM.660.145 http://eprints.uthm.edu.my/6469/1/The_Effect_of_Bottom_Ash_on_Fresh_Characteristic%2C_Compressive.pdf |
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| தொகà¯à®ªà¯à®ªà¯: | Bottom ash is a solid residue produced through combustion process in a coal-fired power
plant. It has been catogarized as a waste and usually disposed in the utility disposed site. With
higher demand on the power energy, more coal-power plant are constructed and abundance of
bottom ash are produced. Recently, the utilization of bottom ash in the construction industry has
gained the interest of researches. Since it has similiar particle size distribution as normal sand, many
attempt has been made in studying it potential use in mortar and concrete. In complementary to that,
this paper presents the effect of bottom ash on fresh and hardened properties of self-compacting
concrete (SCC). Bottom ash is used as fine aggregate replacing sand with replacement ratio range
from 0% to 30% by volume. The effects of bottom ash on the SCC were investigated by comparing
the test result of SCC mixed bottom ash with control specimens (0% of bottom ash). The test result
on fresh properties of the concrete mixture revealed that, as the replacement level of bottom ash
increased, the slump flow, L-box passing ratio and segregation resistance ratio (SR) decreased.
Nevertheless, the slump flow time (T500) result increased with the increased of bottom ash content.
The results show that the porosity and the irregular shape of the bottom ash particle has great
influence on workability and viscosity of the fresh concete. The compressive strength and water
absorption test are carried out on the sample at curing time of 7 and 28days. In terms of strength, the
use of bottom ash in the production of SCC has increased the compressive strength of the concrete
up to 15% replacement level. The increase in strength show the presence of the pozzolanic reactivity
in a concrete with bottom ash particle. The water absorption rate was observed to be lower with a
sample which having 10% and 15% replacement level. |
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