Document Type : Original Article
Head of Building Materials and Products Department, Building and Housing Research Center
Iran Polymer and Petrochemical Institute
The need to save energy and lighten the building using industrial production methods has led to the emergence of new cladding materials in the world. Some of these new materials, in addition to facing, are used for thermal insulation of the external walls. External Thermal Insulation Composite System (ETICS) is a suitable option for the cladding and at the same time thermal insulation of the buildings. It consists of thermal isulation, the base coat reinforced by glass fiber mesh and a layer of top coat. In this study, the replacement of ETICS final coat with the flexible bricks was investigated. Flexible brick specimens similar to those produced in the Czech Republic were designed and manufactured on a laboratory scale. In the preparation of samples, silica sand and polymers based on acrylic Ester with the necessary additives were used. The ingredients were mixed well and placed inside the molds. After drying, the samples were taken out of the molds. The standard tests were performed on the samples. The results of the experiments were promising, and the properties of some flexible laboratory brick samples were even better than those of commercial bricks. The obtained results indicate the suitable properties of one of the compounds, with the difference that in the native sample, glass fibers were used to strengthen and increase the tensile properties, which increased the tensile strength up to twice. Other characteristics of this mixture such as water absorption, density, resistance to penetration and impact resistance were acceptable and similar to the foreign samples. Studies have shown that the production of these bricks in Iran is possible.