기계화 경작로 콘크리트 포장의 균열제어 및 내구성 향상을 위한 폴리프로필렌섬유의 효과

Abstract

Plastic shrinkage cracking is a major concern for mortar and concrete, especially for flat structural surfaces such as pavement, slabs for industrial factories and walls. One of the method to reduced the adverse effects of shrinkage cracking is to reinforced concrete with randomly distributed fibers. The contribution of polypropylene fiber to the plastic shrinkage crack reduction potential and durability of rural road concrete pavement and its evaluation are presented in this paper. The results of plastic shrinkage crack test of the polypropylene fiber reinforced concrete pavement were compared with plain concrete pavement. Results indicated that polypropylene fiber reinforcement showed an ability to reduce the total crack area and maximum crack width significantly (as compared to plain concrete). The effects of durability of polypropylene fiber reinforced concrete were investigated through accelerated laboratory tests simulating the effects of wet-dry cycles and chloride permeability as well as abrasion resistance. Results indicated that the polypropylene fiber reinforced concrete enhanced durability.