Abstract
The thermal performance of the building materials is relevant to any use of composite materials, especially in relation to constructions where it is desirable to have high specific heat, low thermal conductivity and slight or no decrease of stiffness upon heating. The thermal coefficients of composite mortars made up of mixtures of combining styrene polyacrylic SPA Latex and supplementary cementitious materials SCMs were measured at different ages (7, 14, 28, 60, 90 and 120 days). So, in order to determine the thermal conductivity, the calorific capacity and thermal diffusivity of SCM-modified mortars, it seemed interesting to evaluate the influence of adding the SPA Latex (0.5%, 1% and 2%w) on the properties of these mortars when exposed to a quick thermal conductivity meter based on standard ISO 8302-91. The highest thermal conductivity of 1.51 W.m-1.K-1 was observed with the samples containing only plain cement. It decreased with the increase of SPA latex percentages. The lowest values of thermal coefficients were obtained with the samples prepared with SPA polymer at 2% and SCMs. In this way, the results obtained highlight the beneficial effect of combining SPA polymer and SCM materials as thermal insulation in comparison with other insulation materials. In fact, using SCMs as cement substitutes reduces the energy consumption. These composite mortars address problems related to environmental pollution by CO2 emissions, and can be recommended as materials for energy efficiency in buildings.
Highlights
The reduction of energy consumption in the building sector is a major challenge in order to cope with the scarcity of fossil energy resources and the problem of climate change (Neville, 1996)
The thermal conductivity decreases with age and polymer content; this is due to the reduction in the density of the composite and to the increase in its air content
- The thermal conductivity decreases as the styrene polyacrylic (SPA) Latex content in the composite increases
Summary
The reduction of energy consumption in the building sector is a major challenge in order to cope with the scarcity of fossil energy resources and the problem of climate change (Neville, 1996). The use of industrial mineral byproducts, such as silica fume (Belbachir et al 2016; Hassan et al 2012) or Algerian natural pozzolana (Belbachir, 2017; Ghrici et al, 2006; Kaid et al, 2009; Senhadji et al, 2014; Siad et al, 2013), in composite materials generally involves technological advantages and significant energy savings as well as CO2 emission reductions. This should be consistent with the concept and objectives of sustainable development.
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