Concrete Sleeper

A concrete sleeper is a railroad tie made out of steel reinforced concrete.

Read more about Concrete Sleeper:  History, Types, Advantages, Under Sleeper Pads, Disadvantages, Alternatives, Manufacture, Transport, Installation, Oldest, Turnouts, Problems, Inventors

Famous quotes containing the word concrete:

    “Beauty, like all other qualities presented to human experience, is relative; and the definition of it becomes unmeaning and useless in proportion to its abstractness. To define beauty not in the most abstract, but in the most concrete terms possible, not to find a universal formula for it, but the formula which expresses most adequately this or that special manifestation of it, is the aim of the true student of aesthetics.”
    —Walter Pater (1839–1894)