Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/65706
Title: Influence of aggregate fraction in the mix on the reliability of the rapid chloride permeability test
Authors: Wee, T.H. 
Suryavanshi, A.K. 
Tin, S.S.
Keywords: Aggregate content
Electrical resistivity
Rapid chloride permeability test
Silica fume
Soaking test
Issue Date: Feb-1999
Source: Wee, T.H.,Suryavanshi, A.K.,Tin, S.S. (1999-02). Influence of aggregate fraction in the mix on the reliability of the rapid chloride permeability test. Cement and Concrete Composites 21 (1) : 59-72. ScholarBank@NUS Repository.
Abstract: The present paper elucidates the influence of aggregate content of the mix on the reliability of rapid chloride permeability test (RCPT) results. For this purpose, test specimens prepared with mixes varying in total aggregate content were subjected to soaking test, RCPT and electrical resistivity measurements, and the results from these tests were compared and conclusions drawn. The RCPT results indicated the plain cement concrete to be relatively more resistant against chloride penetration than the plain cement mortar, whilst the opposite was true according to the 90-day soaking test results. The above trend did not change despite the addition of silica fume (SF) to the concrete and mortar mixes. The lower aggregate content or higher paste content of plain cement mortar and the mortar with SF is shown to mislead the RCPT results. The higher paste content in the above mix promotes the conduction of higher charge as a result of lower electrical resistivity. Thus the results derived from the present investigation emphasize the need to consider the volume fraction of aggregate in the mix with and without SF while interpreting the RCPT results. Furthermore, regardless of the total aggregate and SF content in the mix, the total charge passed (from the RCPT) through the mix decreased exponentially with increasing electrical resistivity. On the other hand, for those mixes containing either SF or a high volume fraction of aggregates the linear correlation between the total charge passed and chloride penetration coefficient (K) was poor. However, for the mix with relatively lower aggregate content and with no SF the charge passed was well correlated linearly with K. © 1999 Published by Elsevier Science Ltd.
Source Title: Cement and Concrete Composites
URI: http://scholarbank.nus.edu.sg/handle/10635/65706
ISSN: 09589465
Appears in Collections:Staff Publications

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

Page view(s)

38
checked on Dec 8, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.