Study on Engineering Properties of Lightweight Concrete Board Reinforced with Bamboo Splint

Abstract

In this paper, the engineering properties are studied on the specimens made from the Bambusa stenostachya bamboo and Phyllostachys makinoi Hayata bamboo produced in Taiwan. Firstly, the influence of bamboo surface treatment on the bond strength is discussed. Secondly, four kinds of bamboo sheets (tubes) nets are used to make lightweight concrete slabs, and their flexural behaviors are discussed. It can be seen from the test results that after the bamboo surface is treated with epoxy resin mortar, compared with the untreated bamboo, the Bambusa stenostachya bamboo bond strength is increased by about 77%, and the Phyllostachys makinoi Hayata bamboo is increased by about 67%. And after splitting, it is found that the bamboo without surface treatment is partially rotted, which seriously affected its bond strength with the concrete. It is shown that the bamboo surface has better bond strength after coating with epoxy resin mortar. The lightweight concrete board with Bambusa stenostachya bamboo mesh and surface treatment can obtain better flexural strength, which is about 3.6 times higher than the flexural strength of the lightweight concrete board without bamboo. The deflection of the lightweight concrete board containing Phyllostachys makinoi Hayata bamboo half-pipe net after bending is the largest, which is about 5.1 times that of the control group. By comparing the flexural strength and deflection contribution per unit bamboo volume of the board, and comparing the failure modes, it is speculated that the engineering properties of bamboo lightweight concrete slabs in this study are mainly affected by the placement of the bamboo mesh in the board and bamboo volume ratio.