✦ LIBER ✦

Aspects of the pore solution chemistry of blended cements related to the control of alkali silica reaction

✍ Scribed by I. Canham; C.L. Page; P.J. Nixon

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 354 KB
Volume: 17
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(87)90046-9

No coin nor oath required. For personal study only.

✦ Synopsis

The effects of four pulverised fuel ashes (PFA) and three ground blastfurnace slags (GBFS) on the alkalinity of the pore solution phase of hardened cement pastes has been studied. It has been found that the total alkali content of a PFA is an important factor, but not the only one, determining its effectiveness in reducing the hydroxyl ion concentration of the pore solution. For GBFS, however, there was found to be no direct correlation between the total alkali content of the slag and the composition of the pore solution. Implications regarding the roles of PFA and GBFS in reducing expansion associated with alkali silica reaction (ASR) are discussed.

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