| Title |
A study on optimum condition and properties of the components in acrylic fiber- reinforced cement composite using acrylic fiber as a substitute for asbestos |
| Keywords |
Cement Composite ; Acrylic Fiber ; Inorganic Filler ; Interfacial Adhesion ; Sulfite Pulp |
| Abstract |
The objective of the study is to analyze the optimum condition and properties of the components necessary for producing acrylic fiber-reinforced cement composite using acrylic fiber, usage of which is now common in most developed countries, as a substitute for asbestos.
When acrylic fiber is used as reinforcing fiber in a cement composite, C-PAM(Cation Polyacrylamide) proved to be an optimum interfacial coupling agent in terms of adhesion between acrylic fiber and cement. Excellent degree of internal compactness of the cement composite can be achieved in respect of water content and water absorption by adding adequate amount of acrylic fiber and C-PAM. In respect of tensile and flexural properties, the content of acrylic fiber has significant effect not only on the interfacial adhesion and compactness of the matrices also on the properties of the cement composite. Having examined the tensile failure planes of acrylic fiber-reinforced cement composite, the content of reinforcing fiber determines the mode of failure either pullout or shear of the fibers in the matrix. Optimization of the fiber content is therefore crucially important in the mixture of cement composites.
The study has demonstrated that acrylic fiber-reinforced cement composite with excellent interfacial adhesion can be achieved by combining the three key components - acrylic fiber, talc and recycled sulfite pulp, mixed with C-PAM as interfacial coupling agent - with their optimum content being 2.0～2.5%, 25% and 3.0%, respectively. |