Impact of accelerated climatic aging on the behaviour of gypsum plaster-straw material for building thermal insulation

Written by esba

Accelerated aging methods are needed to estimate the potential long-term serviceability of building materials under environmental conditions of use. In this paper, we examine the effects of dry-wet and freeze-thaw cycling on the thermal and mechanical properties of new straw-plaster composite materials proposed for building insulation. The material specimens used in the present study were manufactured with two straw varieties, wheat and barley. The gypsum plaster is used because of its thermal properties and ease of manufacture. Only the optimized mixture was used to perform the accelerated aging tests. In order to evaluate the long-term behavior of the straw-plaster composite, the non-aged specimens were characterized at constant conditions of temperature and humidity for three different curing times of one, three and six months.

Comparisons between the properties of the aged and unaged material showed that freezing-thawing cycles had only a slight effect on the thermal and mechanical response of the composites compared with drying-wetting cycles.


  1. Belayachi, Naima
  2. Hoxha, Dashnor
  3. Slaimia, Marouen


About the author


The European Straw Building Association is an independent European association, devoid of any profit making motive. The object of the Association is to promote and develop the use of straw, as a sustainable way of building in all the senses of the term “sustainable”: renewable, ecological, healthy, energy and climate efficient, social and economic.
The Association is a federation composed of organisations and people particularly concerned with the use of straw in buildings.