| Title |
Effects of coupling agent upon interfacial adhesion in the matrix of reinforcing fiber and cement composites |
| Keywords |
Matrix ; Coupling agent ; Reinforced fiber ; Cement ; Interfacial adhesion |
| Abstract |
It is necessary to reinforce the interfacial adhesion between components in fiber reinforced cement composite either by surface treatment thereby producing interfacial attraction or by reinforce the interfacial adhesion between organic and inorganic materials by means of coupling agent. The objective of the study is to propose a practical approach in selecting a suitable interfacial coupling agent for an assorted reinforcing fiber and cement compounds and to determine the most appropriate coupling agent for a particular combination. The experiment analyzed the integrity of the interfacial adhesion by means of VMS(video microscope system) as well as by measurement of interfacial adhesion, demonstrating polyacrylamide, a polymeric coupling agent, being the most effective coupling agent for the purpose of reinforcing the interfacial adhesion between reinforcing fiber and cement. There are three different kinds of PAM depending on the ionization; N-PAM, A-PAM and C-PAM, each reinforcing fiber material having its own optimum PAM. The experiment has demonstrated that N-PAM was least effective for all the reinforcing fibers used in the analysis. While A-PAM coupling agent was most effective in PVA fibers, C-PAM proved to be the most effective coupling agent in both acrylic and carbon fibers. |