Sealants between elements of aerated concrete

Research output: Contribution to journalArticle

Abstract

Because of the low tensile strength of aerated concrete, the sealing of joints between such elements causes special problems.

In this paper some main characteristics of sealants for use in aerated concrete joints are discussed. These properties are elongation resistance, elasticity, and ageing. The elongation resistance was examined at different rates and different temperatures. The elasticity was determined by measuring the residual deformation after a certain elongation. Storing in heat (40°C or 70°C) was used for accelerating ageing.

Of ten sealants, only four were found to be suitable in aerated concrete joints. Many of the disqualified sealants showed defective ageing properties or high resistance to elongation, which in some cases caused cohesive failure within the aerated concrete.

Details

Authors
  • Per Gunnar Burström
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Materials Engineering

Keywords

  • Aerated concrete, sealants, mastic, ageing, deformation characteristics, heat
Original languageEnglish
Pages (from-to)43-47
JournalInternational Journal of Cement Composites and Lightweight Concrete
Volume2
Issue number1
Publication statusPublished - 1980
Publication categoryResearch
Peer-reviewedYes