Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/31642
Title: Rate of pozzolanic reaction of metakaolin in high-performance cement pastes
Authors: Poon, CS 
Lam, L
Kou, SC
Wong, YL
Wong, R
Keywords: Compressive strength
Degree of pozzolanic reaction
High performance
Metakaolin
Pore size distribution
Issue Date: 2001
Publisher: Pergamon Press
Source: Cement and concrete research, 2001, v. 31, no. 9, p. 1301-1306 How to cite?
Journal: Cement and concrete research 
Abstract: This paper assesses the hydration progress in metakaolin (MK)-blended high-performance cement pastes with age from the measurements of compressive strength, porosity, and pore size distribution, the degree of pozzolanic reaction, and the Ca(OH) 2(CH) content of the MK-blended cement pastes at a water-to-binder ratio (w/b) of 0.3. Comparisons are also made with pastes containing silica fume (SF), fly ash (FA), and control Portland cement (PC). It is found that at early ages, the rates of pozzolanic reaction and CH consumption in the MK-blended cement pastes are higher than in the SF- or FA-blended cement pastes. The higher pozzolanic activity of MK results in a higher rate of strength development and pore structure refinement for the cement pastes at early ages. Although the rate of pozzolanic reaction of MK becomes slower after 28 days of curing, the pozzolanic reaction in the blended cement pastes with a w/b of 0.3 still continues at the age of 90 days. At this age, about half of the MK still are unreacted.
URI: http://hdl.handle.net/10397/31642
ISSN: 0008-8846
EISSN: 1873-3948
DOI: 10.1016/S0008-8846(01)00581-6
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