Compressive strength and expansion of blended cement mortar containing palm oil fuel ash
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Publication Details
Author list: Tangchirapat W., Jaturapitakkul C., Kiattikomol K.
Publisher: American Society of Civil Engineers
Publication year: 2009
Journal: Journal of Materials in Civil Engineering (0899-1561)
Volume number: 21
Issue number: 8
Start page: 426
End page: 431
Number of pages: 6
ISSN: 0899-1561
eISSN: 1943-5533
Languages: English-Great Britain (EN-GB)
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Abstract
This research aims to utilize palm oil fuel ash (POFA) as a pozzolanic material for replacing portland cement. POFA was ground by ball milling until the median particle sizes were 19.91 (G1P) and 10.18 μ;m (G2P). portland cement Type I was replaced by all POFA of 10-40% by weight of the binder. The effects of POFA fineness on the setting times, compressive strength, and expansion of mortars exposed to a 5% MgSO4 solution were investigated. It was found that the use of POFA to replace portland cement Type I caused an increase in water demand for normal consistency and setting times, depending on the fineness and level replacement of POFA. With 10% replacement of portland cement Type I by G1P or G2P, the compressive strengths of the POFA mortars were 102-104% of that of portland cement Type I mortar at 90days. For sulfate resistance, the expansions at 1year for all mortar bars containing G1P or G2P were less than those of mortar bars made from portland cement Types I and V. The results suggest that ground POFA is a good pozzolanic material and can be used to increase both the compressive strength and the sulfate resistance of mortar. © 2009 ASCE.
Keywords
Cements, Mortars
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