Study on splitting tensile toughness of seawater sea sand concrete reinforced with bamboo sticks

Concrete is a typical material with high compressive strength but weak tensile strength. But the tensile strength affects the formation and development of cracks in concrete, so it is an essential factor in the practical application of concrete. Concrete can be enhanced its tensile strength by incorporating sticks with good tensile resistance, and bamboo stick is a good choice. This paper conducted a series of comparative tests (64 specimens) on splitting tensile strength of bamboo stick reinforced seawater sea-sand concrete (BFRSSC). The effects of volume fraction, length-diameter ratio, and diameter of bamboo stick were studied, and the specimen’s load-displacement and load-strain curves under different variables were analyzed. The result shows that the impact of stick volume fraction on splitting tensile behavior is the most obvious, while the bamboo stick diameter has the least impact on it. In addition, this paper also analyzes the toughening mechanism of bamboo stick and gives the regression model of splitting tensile strength of bamboo stick-reinforced seawater sea sand concrete, in order to lay a theoretical foundation for the promotion of bamboo stick in marine materials.