Efektivitas Penambahan Pin Terhadap Kuat Cabut Tulangan Bambu Apus pada Beton Normal Struktural

Abstract

Bamboo is an alternative material that has the potential to be developed as a replacement for steel bars because bamboo has a tensile strength comparable to steel. However, there are constraints on the properties of the expansion and shrinkage of bamboo, which in its use as reinforcement, bamboo will expand due to the absorption of water in fresh concrete and then will shrink along with the evaporation of water in the process of drying concrete. Shrinkage in a bamboo cause a loss of bonding in bamboo and concrete that may cause a collapse. This paper discusses the effectiveness of the addition of a pin to the pullout strength of apus bamboo reinforcement on the structural normal concrte. The pin that was added is a steel wire that is implanted as a retaining when the shrinkage of bamboo reinforcement occur. The specimen was a concrete cylinder with a height of 20 cm and a diameter of 12 cm, analytical approach taken to equalize the dimensions of the bamboo with a diameter of 6 mm steel reinforcement. Variation of the number of pins used were 0, 2, 3 and 4. The results show that the ratio of the pullout strength of bamboo reinforcement with the addition of 3 pins, to the pullout strength of steel reinforcement is 1.01. The Addition of pin showed a high effectiveness to the pullout strength of apus bamboo reinforcement with a 92.22% infulence.

Keywords

• Concrete
• effectiveness
• pullout strength
• pin