In the Late Classic Period Yaxchilan was one of the most powerful Maya cities along the course of the Usumacinta, with Piedras Negras as its major rival. Architectural styles in subordinate sites in the Usumacinta region demonstrate clear differences that mark a clear boundary between the two kingdoms.
Answered by The Community. Making the world better, one answer at a time. Steel is not usually considered a composite, as it is macroscopically homogeneous. However, some steel types, including classical iron-carbon steel, can be considered as metal-matrix composites, as they contain a second phase... sometimes.
The fibers which could be used in the. concretes are steel fibers, polypropylene, nylon, asbestos, coir, glass and carbon. In this. investigation crimped steel fibers have been used. The diameter of fibers is 0.6mm and the Aspect. ratio is 50. by tamping with a tamping rod and the vibration. 2.1.5 Rubber Latex.