Behaviour of thermostone blocks with and without cement mortar plastering exposed to high temperatures

Abstract

Autoclaved aerated concrete (Called Thermostone in Iraq) is one of the popular building materials that are used in various purposes in construction industries. It is factory-made material that can be moulded into blocks which can be used in framework buildings. However, these buildings are under the risk of fire since it has different cusses such as arson and electrical short circuit. It is important to find ways to improve counter such phenomenon. Therefore the objective of this paper is investigating the fire resistance performance of Thermostone with and without plastering. Five different samples were used for the test, four of them were covered with different types of plastering. Three tests were employed for this study: Compressive, absorption, and density test. For all tests, the samples were exposed to elevated temperatures from 250 °C to 900 °C. It was shown that plastered samples have demonstrated a higher fire resistance and lower absorption rate than non-plastered ones.

Improving the Thermostone Properties by Treating with Some Additives

“…known for their effectiveness against rodents and it turned out that the best replacement ratio was 10%, where the pressure becomes 45% kg/cm 2 and the porosity increases to 62%. The density reaches 0.72 kg/cm 3 as shown in Table (4) and Figures (5, 6, & 7).…”

“…Factories have been established geographically distributed over many governorates and this material is beginning to appear in some buildings, especially as a dictation material in concrete structures and as a material for creating partitions, and then it has been adopted as a basic building material and will have an effective role in the integration of systems industry Open building (OPEN SYSTEM BUILDING) that can be developed. The emergence of these systems and their presentation in the market will have the greatest role in accelerating the process of building many buildings, especially those of a recurring nature [3,4]. The research's objective is to enhance thermostone specifications with the addition of additive materials.…”