CUED Publications database

Impregnation of lightweight aggregates with sodium silicate for self-healing concrete

Aghamri, R and Al-Tabbaa, A (2016) Impregnation of lightweight aggregates with sodium silicate for self-healing concrete. In: UNSPECIFIED pp. 623-630..

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Abstract

© 2016, A.A. Balkema Publishers. All rights reserved. This study investigated a technique of impregnating self-healing agents into lightweight aggregates (LWA) and the self-healing performance of concrete mixed with the impregnated LWA. Lightweight aggregates with a diameter range of (4-8) mm were impregnated with sodium silicate as a self-healing agent. Concrete specimens contained the impregnated LWA and control specimens were pre-cracked for 300 μm crack surface width at 7 days. Flexural strength recovery and reduction in water sorptivity were examined. After 28 days healing in water, the specimens contained the impregnated LWA showed ~80% recovery of the pre-cracking strength, which accounts nearly five times of the control specimens’ recovery. The water absorption was also significantly improved; the specimens healed with the impregnated LWA displayed a 50% reduction in the sorptivity index compared with the control cracked specimens.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:00
Last Modified: 12 Oct 2017 01:53
DOI: