Effect of Natural Mineral Fibers on the Strength of Lime Metakaolin Mortar

摘要

This Thesis researches influence of different fiber parameters on crack performance of metakaolin geopolymer, adopts two performance indexes of crack width and crack area to analyze influences of fiber type, fiber draw ratio on crack performance of metakaolin geopolymer. Researches indicate that crack performance of carbon fiber is better than alkali-resistant glass fiber, mineral fiber and polypropylene fiber; and crack performance of polypropylene is improved with the increase of amount of admixture; polypropylene fiber lengthened as eighteen millimeters is better than fibers of twelve millimeters and six millimeters; crack performance of cross-section shape as trefoil is better than that of triangle and round. Due to the fact that fiber is crossed in the internal structure of hardened samples with its function of bridge connection joint.