抄録
It has been reported that the properties of Normal Portland Cement and Gypsun are improved by the particle or fiber reinforcements, but there are few researches concerning with the relations between the improved properties of particle or fiber reinforced matrices and the structural performances of members. Then we carried out some investigations on this ploblem. In this paper the method of the analysis and the results of the theoretical study are explained and in next paper (part 9) the experimental study will be reported. The properties of inorganic matrices like Normal Poltland Cement and Gypsum are improved by the particle or fiber reinforcement on the tensile strength, bond strength and toughness. A beam bearing four point simple bending is chosen as a model in the analysis so that the improved properties of matrices are to be distinctly indicated on structural performances. In the analysis load-deflection curves of the beams are estimated by the elastic-plastic theory on the suppositions that the cross section of the beam keeps plane and after the initiation of cracks the tensile zone of the matrix is ignored. The results of the analysis as follows are obtained. The particle or fiber reinforcement of matrices improves the structural performances of the beam that are the crack initiation load, bond strength, shearing strength and absorbing energy until ultimate fracture.
