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Abstract

The present work is an experimental investigation concerned with developing plastering cement mortar characterized by an enhanced heat endurance to act as a heat barrier to rather sensitive materials like Advanced Composite Materials (ACM). For this purpose, finely ground waste glass and finely ground granulated blast furnace slag were introduced into the mortar mixtures. A total of eleven mixtures were cast, each of which comprises six groups of mortar cubes. For all mixtures, compressive strength is evaluated at ages extending from one week to three months. After 28 days of water curing, their compressive strengths were evaluated after exposure to elevated temperatures ranged from 200°C to 800°C. The retained strength after heat exposure is regarded as the heat endurance measure. A mineralogical study was conducted on the mortar specimens before and after exposure to 800°C. As a consequence, the formed cementitious phases and the heat induced transformations are clarified. Test results show that by utilizing either ground glass or ground slag a remarkable enhancement in strength and heat endurance can be achieved. This is due to their pozzolanic nature and superior thermal stability.

Keywords

heat endurance heat insulation elevated temperature ground glass retained strength

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Heat Enduring Cement-Glass Mortar

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