Investigation of the moisture influence on permeation properties of alkali-activated slag concrete

Kai Yang, Sreejith Nanukuttan, Changhui Yang, Bryan Magee, Jianxiong Ye, PAM Basheer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study reports an experimental investigation designed to assess the influence of near- surface moisture contents on permeation properties of alkali-activated slag concrete (AASC). Three AASC and normal concretes with compressive strength grades ranging from C30 to C60 were tested under five different drying periods. Assessment of moisture distribution was achieved using 100 mm diameter cores with drilled cavities. Results indicate that air permeability of AASC is very sensitive to the moisture content and its spatial distribution, especially at relative humidity above 65%. To control the influence of moisture on permeation testing, the recommendation of this paper is that AASC specimens should be dried in controlled conditions at 40 oC for 10 days prior to testing. It was also concluded from this study that AASC tends to perform less well, in terms of air permeability and sorptivity, than normal concrete for a given strength grade. This conclusion reinforces the need to further examine AASC properties prior to its widespread practical use.
Original languageEnglish
Title of host publicationUnknown Host Publication
PublisherRILEM Publications
Pages273-282
Number of pages10
ISBN (Print)978-2-35158-179-7
Publication statusAccepted/In press - 10 Jul 2016
EventInternational RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Concrete with Supplementary Cementitious Materials - Technical University of Denmark, Lyngby, Denmark
Duration: 10 Jul 2016 → …

Conference

ConferenceInternational RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Concrete with Supplementary Cementitious Materials
Period10/07/16 → …

Keywords

  • permeation
  • durability
  • alkali-activated slag concrete

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