Properties of autoclaved aerated concretes produced with different types of fibers

Abstract

Autoclaved Aerated Concrete (AAC) is a well-known Lightweight Concrete (LWC) and consists of a mixture of sand, lime, cement, gypsum, water and an expanding agent. The AAC is generally used in structures for the insulation properties against heat and sound. However, the mechanical properties of this material is comparatively lower. The aim of this study is to increase the mechanical properties of AAC by adding different fibers. The experimental studies, were carried on polypropylene, steel and glass fiber. Firstly, aerated concrete have been prepared in the laboratory and placed in the molds of 70 x 70 x 70 mm dimension. Then, AAC specimens have been pre-cured in the furnace at 40 degrees C for 4 hrs. After that, specimens have been cured in an autoclave for 8 hrs. Finally, AAC specimens were subjected to compressive strength and unit weight tests. Test results showed that fiber usage has beneficial effect on mechanical properties of AAC.