الفهرس 
Definition of Green BuildingOnly 14 pages are availabe for public view
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Abstract
Investigating the environmental properties of building materials is a very important branch of studying properties and testing of materials. It is a new trend towards these studies, which it must be focused on to make an environmental building or a green building. This research was conducted to elucidate mechanical and physical properties of some widely used building material. The radioactivity properties were studied as environmental properties that affect man health. Concrete, brick, ceramic tiles and granite were chosen as most common materials used in the building construction. Physical and mechanical properties of those building materials were investigated as well as their radioactivity. All the investigated materials were in the safe limits. An extension to the experimental program was the theoretical study. A simulation of residential spaces using an advanced computer program was carried out to calculate the radioactive effective dose of the investigated materials. The radon concentration was calculated. The parameters of the equation were time,dimensions and ventilation rate. Gathering materials with high radioactivity increases the radon concentration of the indoor air. Seeking parameters effect,the ventilation rate proved to be the most effective parameter, which reduces the radon concentration in the residential spaces. Using materials with low radioactivity is another solution. The plan dimension of rooms has a low effect in reducing radon concentration. On the contrary, increasing room heights decreased radon concentration.