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Cementing Efficiency of Fly-ash in Mortar Matrix According to Binder-Water Ratio and Fly-ash Replacement Ratio

Title
Cementing Efficiency of Fly-ash in Mortar Matrix According to Binder-Water Ratio and Fly-ash Replacement Ratio
Author
지남용
Keywords
fly-ash; cementing efficiency; relative strength; modified cement-water ratio; strength prediction
Issue Date
2012-04
Publisher
한국건축시공학회
Citation
한국건축시공학회지, Apr 2012, 12(2), P.194-202, 9P.
Abstract
This paper predicts the cementing efficiency of fly-ash(FA) based on mortar test considering binder-water ratio and FA replacement ratio as experimental variables. The cementing efficiency prediction model proposed by statistical analysis enables us to estimate the value according to the binder-water ratio and FA replacement ratio of matrix. When FA replacement ratio is the same, the lower the binder-water ratio, the higher the estimated cementing efficiency. There are significant differences in the values according to binder-water ratio at FA replacement ratios of 15% or less, but there are almost no differences when FA replacement ratio is more than 15%. As the binder-water ratio increases, the variations in the values according to FA replacement ratio are great at FA replacement ratios of 15% or less. As the FA replacement ratios increase, the values increase for FA replacement ratios of 15% or less, but decrease for more than 15%. The values range from -0.71 to 1.24 at binder-water ratio of 1.67-2.86 and FA replacement ratio of 0-70%. The RMSE of the 28-day compressive strength predicted by modified water-cement ratio is 2.2 MPa. The values can be trusted, as there is good agreement between predicted strength and experimental strength.
URI
http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=GCSGBX_2012_v12n2_194http://hdl.handle.net/20.500.11754/49009
ISSN
1598-2033; 2233-5706
DOI
10.5345/JKIBC.2012.12.2.194
Appears in Collections:
OFFICE OF ACADEMIC AFFAIRS[S](교무처) > ETC
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