Durability analysis of bamboo as concrete reinforcement

Autor: Maxer A. Rosa, Normando Perazzo Barbosa, Humberto C. Lima, Fábio L. Willrich, Bruna S. Cunha
Rok vydání: 2007
Předmět:
Zdroj: Materials and Structures. 41:981-989
ISSN: 1871-6873
1359-5997
Popis: Durability is an actual challenge concerning all construction materials. If these materials are natural, the necessity to understand their long term behaviour is extremely important, because they are considered as having a low capacity to maintain their properties with time. Bamboo is a high strength material that can be used, in certain cases, as reinforcement in concrete. As concrete matrix has a high pH, many authors have discussed the decay of vegetal materials when used to reinforce cementitious matrix. This paper presents results of an experimental investigation made to evaluate bamboo durability to be used as concrete reinforcement. The durability was evaluated by changing the tensile strength and Young’s Modulus of bamboo. Five hundred specimens were extracted from a Dencrocalamus giganteus bamboo culms and part of them was set into concrete prisms. A set up was developed to expose the specimens to wetting and drying cycles. Each exposure to wetting and drying lasted 24 h. The specimens without concrete were submitted to a calcium hydroxide solution and the samples with concrete were immersed in tap water. Tensile strength and Young’s Modulus were measured after 7, 15, 30, 45 and 60 cycles. Results did not show any significant variation on these mechanical properties, attesting the durability of bamboo in these aggressive tests.
Databáze: OpenAIRE
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