Effect of Sodium Hydroxide Concentration on the Mechanical Property of Non Sodium Silicate Fly Ash Based Geopolymer

In this study, fly ash was used as the raw material to provide Si, Al and sodium hydroxide (NaOH) as the only activator for the synthesis of geopolymer. This study describes the effect of varying the sodium hydroxide concentration with respect to curing time and temperature on mechanical properties...

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Bibliographic Details
Published in:	Journal of applied sciences (Asian Network for Scientific Information) Vol. 14; no. 23; p. 3381
Main Authors:	Rahim, R H Abdul, Azizli, K A, Man, Z, Rahmiati, T, Nuruddin, M F
Format:	Journal Article
Language:	English
Published:	01-01-2014
Subjects:	Aluminum Compressive strength Curing Fly ash Mechanical properties Raw materials Silicates Sodium hydroxide
Online Access:	Get full text
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Summary:	In this study, fly ash was used as the raw material to provide Si, Al and sodium hydroxide (NaOH) as the only activator for the synthesis of geopolymer. This study describes the effect of varying the sodium hydroxide concentration with respect to curing time and temperature on mechanical properties of non-sodium silicate fly ash based geopolymer. The samples were prepared by mixing fly ash with 8, 10 and 12 M of NaOH concentration and cured in room temperature and 60 degree C for 1, 7 and 28 days. The highest alkali concentration of 12 M showed the fastest setting time and the highest compressive strength regardless of days of curing. The highest compressive strength obtained for curing at 60 degree C was 59.81 MPa and 45 min was recorded for the setting time. Meanwhile, at room temperature, the highest strength obtained was 17.71 MPa and 248 mm for setting time.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1812-5654 1812-5662
DOI:	10.3923/jas.2014.3381.3384