EL Moustapha Bouha
Abstract
The incorporation of micro-encapsule phase change materials (MPCM) into geopolymer-based materials is one of the efficient technologies to reduce energy consumption in the world.
Although MPCM increases the thermal capacity of the cementitious matrix, whether it is based on cement or geopolymer, their incorporation has unfortunately several negative effects on the mechanical performances. This scientific problem is still unsolved and several researchers have pointed it out. This study aim to investigate the effect of 10 and 20% metakaolin(MK) inclusion on the mechanical performance of geopolymer-MPCM mortars based on granulated blast furnace slag (GBFS) and to compares them with cement-MPCM based mortars. Different tests were performed for to types of mortar in the aim to characterize their properties such as workability, porosity, compressive strength, dynamic Young's modulus and dynamic shear modulus.
The results show that the inclusion of two proportions of metakaolin compensated well for the loss of mechanical strength related to the incorporation of MPCM. therefore, with up to 20% of MPCM the inclusion of metkaolin increased the compressive strength by about 10 MPA. In addition, all geopolymer-MPCM mortars showed high compressive strengths, improved workability and reduced porosities compared to portland cement-based mortars.
Keywords
Geopolymer;Phase change matérials; granulated Blast furnace slag;Metakaolin; Mechanical properties
