초록 close

The aim of the study is to suggest an optimal inorganic filler and its contents applicable to PVA fiber reinforced cement matrix by means of quantifying the degree of interfacial adhesion between a selected range of inorganic filler materials and PVA fibers followed by analyzing physical and mechanical properties of PVA fiber reinforced cement composite in relation to the contents of inorganic filler.Based on the result of analysis on interfacial adhesion between inorganic filler and PVA fiber materials, kaolin, fly ash and mica have proved to be excellent filler materials for cement matriceshaving superior adhesion performance with PVA fibers. Compactness of cement matrix is influenced by chemical components and their content of the respective filler material being used. In addition physical properties are heavily affected by type of filler materials and its configuration. Observing the failure plane of PVA fiber-reinforced cement composite mixed with one of the optimal filler materials, mica, the specimens have exhibited high degree of compactness with little PVA fibers pulled out within the cement matrix.The key elements in producing fiber reinforced cement matrix using a range of filler materials are:(1) Selection of filler material chemically compatible with reinforcing fibers (2) Maintaining maximum adhesion between reinforcing fiber and filler material (3) Use of optimal content of filler materials.The experimental study has determined that when PVA fiber is used in cement matrix, mica proved to be the most suitable filler material and the range of content is from 20% to 25%.