آنتونی رابینز میگه : من در 40 سالگی به جایی رسیدم که برای رسیدن بهش 82 سال زمان لازمه و این رو مدیون کتاب خواندن زیاد هستم.
زبان فایل : انگلیسی
نوع فایل : PDF
Concrete is the most popular construction material which has a widespread range of structural applications under numerous environmental conditions and under various levels and types of mechanical loads. It is used in buildings infrastruc- tures dams etc. Its suitability and durability require a set of mechanical physi- cal and chemical characteristics in order to extend its service life. Concrete durability is defined according to Concrete Terminology by American Concrete Institute (ACI) as “the ability of concrete to resist weathering action chemi- cal attack abrasion and other conditions of service.” This performance is simply based on concrete chemistry. Concrete durability properties are determined by its chemical structure and porosity. These structural characteristics are determined by cement components and their reactions with water. Understanding concrete durability problems and solutions requires a sufficient knowledge about concrete chemistry.
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