竹材輕質混凝土板工程性質之探討

STUDY ON ENGINEERING PROPERTIES OF LIGHTWEIGHT CONCRETE BOARD REINFORCED WITH BAMBOO SPLINT

10.6652/JoCICHE.202209_34(5).0011

劉玉雯(Yu Wen Liu)；卓世偉(Shih Wei Cho)；林樹根(Shu Ken Lin)

竹材輕質混凝土板 ； 握裹強度 ； 抗彎強度 ； lightweight bamboo reinforced concrete board ； bond strength ； flexural strength

中國土木水利工程學刊

34卷5期（2022 / 09 / 01）

447 - 457

英文

本文主要以台灣生產之莿竹及桂竹製作試體進行工程性質研究。首先探討竹材表面處理之方法對握裹力的影響。其次利用莿竹片網、莿竹片板、桂竹半管材與桂竹半管材網等四種竹片（管）網排列型式製作輕質混凝土板，探討其抗彎行為。由試驗結果可知，竹材表面經環氧樹脂砂漿做防水處理後，相較於未處理之竹材握裹強度，莿竹約增加77%，桂竹約增加67%，且劈裂後發現，未防水處理之竹材出現部分腐爛情形，進而嚴重影響其與混凝土之握裹，顯示竹材表面塗佈環氧樹脂砂漿後，具有較佳握裹力。此外，以莿竹片網且經表面處理製作之輕質竹材板，可獲得較佳的抗彎強度，較未配置竹材的混凝土板約增加3.6倍之抗彎強度。輕質板含桂竹半管材網抗彎後之撓度值最大，約為對照組的5.1倍。而藉由板材每單位竹材體積比抗彎強度和撓度貢獻，並比對破壞形式，推測本研究竹材輕質混凝土板工程性質主要受到竹材網的配置位置與體積比影響。

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.

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