Comparison of the Compressive Strength of Palm Fiber Mixed Concrete and Bamboo Fiber Mixed Concrete with the Addition of Damdex

The addition of palm fibers and bamboo fibers to the concrete is expected to make the concrete more ductile. The advantages of palm fiber and bamboo fiber composites compared to other fibers are that the fibers and bamboo fiber composites are more environmentally friendly because they are able to degrade naturally and the price is cheaper when compared to other fibers. Palm fibers also have properties that are elastic, hard, waterproof and difficult to digest by destructive organisms. The addition of natural fiber, especially bamboo fiber, is an option because it is a natural product that is easy to cultivate. Bamboo has several advantages, namely that it does not experience corrosion, is relatively inexpensive and has low tapering and shrinkage properties and a relatively high tensile strength. Palm fibers and bamboo fibers are renewable natural products that can be obtained easily, cheaply, are easy to plant, grow fast, can reduce the effect of global warming and have high tensile strength. Based on previous research, the addition of damdex to the mixture can increase the compressive strength of concrete. The compressive strength test was carried out at the age of the concrete 14 and 28 days. The research will be carried out at the Laboratory Concrete Structures of Civil Engineering, Faculty of Engineering, Siliwangi University. Increasing the compressive strength of concrete using the addition of damdex with a compressive strength of a concrete plan of 34 Mpa as follows: the highest compressive strength of concrete in the test object at 28 days of age is 37.736 Mpa at the addition of 2.0% damdex or an increase of 19.23% from normal concrete compressive strength 31,619 Mpa. The addition of damdex fibers and bamboo fiber damdex to the concrete mixture is expected to improve the mechanical properties of concrete which is much better than concrete without using added materials and can improve the properties of concrete without reducing its quality. The research that will be carried out aims to analyze the compressive strength of concrete with a concrete mix design with added variations of 0% damdex 0% palm fiber, 0% damdex 0.5% palm fiber, 0% damdex 1% palm fiber, 0.5% damdex 0 % palm fiber, 0.5% damdex 0.5% palm fiber, 0.5% damdex 1% palm fiber by weight of cement. Then compare it with the compressive strength of concrete with a concrete mix design with added variations of 0% damdex 0% bamboo fiber, 0% damdex 0.5% bamboo fiber, 0% damdex 1% bamboo fiber, 0.5% damdex 0% bamboo fiber, 0.5% damdex 0.5% bamboo fiber, 0.5% damdex 1% bamboo fiber by weight of cement.