Heat enduring cement-glass mortar

Abstract EN

The present work is an experimental investigation concerned with developing plastering cement mortar characterized by an accepted 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, the mixtures’ compressive strength was evaluated after exposure to elevated temperatures ranging from 200 ˚C to 800 0C.

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 cementations phases and the heat induced transformations are clarified.

Test results show that by employing either the ground glass or the ground slag and owing to their pozzolanic nature and superior thermal stability a recognized enhancement in strength and heat endurance could be achieved.