Effects of metakaolin and silica fume on properties of concrete

Residential College	false
Status	已發表Published
	Effects of metakaolin and silica fume on properties of concrete
	Ding J.-T.1; Li Z.2
	2002-07-01
Source Publication	ACI Materials Journal
ISSN	0889325X
Volume	99 Issue:4 Pages:393-398
Abstract	Metakaolin is a relatively new mineral admixture for concrete. It is comparable to silica fume in pozzolanic reactivity, but is lower in price. The effects of metakaolin and silica fume on various properties of concrete were investigated and compared in this study. Seven concretes were cast at a water/binder ratio of 0.35 with 0, 5, 10, and 15% cement replaced by either metakaolin or silica fume. The concretes were tested for slump, compressive strength, free shrinkage, restrained shrinkage cracking, and chloride diffusivity by ponding. Metakaolin-modified concrete showed a better workability than silica fume-modified concrete. As the replacement level was increased, the strength of the metakaolin-modified concrete increased at all ages similarly to that of the silica fume-modified concrete. Both mineral admixtures reduced free drying shrinkage and restrained the shrinkage cracking width. However, the cracking time was earlier for these two concretes. The two admixtures also greatly reduced the chloride diffusivity of the concrete.
Keyword	Cracking Shrinkage Silica fume Slump Strength
URL	View the original
Language	英語English
Fulltext Access	View Full-Text via Scopus
Document Type	Journal article
Collection	University of Macau
Affiliation	1.Tsinghua University 2.Hong Kong University of Science and Technology
Recommended Citation GB/T 7714	Ding J.-T.,Li Z.. Effects of metakaolin and silica fume on properties of concrete[J]. ACI Materials Journal, 2002, 99(4), 393-398.
APA	Ding J.-T.., & Li Z. (2002). Effects of metakaolin and silica fume on properties of concrete. ACI Materials Journal, 99(4), 393-398.
MLA	Ding J.-T.,et al."Effects of metakaolin and silica fume on properties of concrete".ACI Materials Journal 99.4(2002):393-398.

Files in This Item:
There are no files associated with this item.

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Affiliation No.
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh