文档介绍：外文文献翻译
1 外文翻译
Reinforced Concrete
Plain concrete is formed from a hardened mixture of cement ,water ,fine aggregate, coarse aggregate (crushed stone or gravel),air, and often other admixtures. The plastic mix is placed and consolidated in the formwork, then cured to facilitate the acceleration of the chemical hydration reaction lf the cement/water mix, resulting in hardened concrete. The finished product has pressive strength, and low resistance to tension, such that its tensile strength is approximately one tenth lf pressive strength. Consequently, tensile and shear reinforcement in the tensile regions of sections has to be provided pensate for the weak tension regions in the reinforced concrete element.
It is this deviation in position of a reinforces concrete section from the homogeneity of standard wood or steel sections that requires a modified approach to the basic principles of structural design. The ponents of the heterogeneous reinforced concrete section are to be so arranged and proportioned that optimal use is made of the materials involved. This is possible because concrete can easily be given any desired shape by placing pacting the wet mixture of the constituent ingredients are properly proportioned, the finished product es strong, durable, and, bination with the reinforcing bars, adaptable for use as main members of any structural system.
The techniques