Pemanfaatan Palm Oil Fly Ash (POFA) dengan Campuran Emulsi Aspal Karet sebagai Material Timbunan Ringan

Abstract

In the manufacture of palm oil, the oil is extracted from fresh palm fruit, and the remaining solids in the product are in the form of shells, palm fiber and empty fruit bunches. POFA is produced from palm oil waste in the form of empty fruit bunches, coir and palm shells which are used as boiler fuel to produce mechanical and heat energy. The steam from the boiler is used to generate electricity and to process CPO (Crude Palm Oil) at the factory. POFA (Palm Oil Fly Ash) causes problems for the environment, this study was carried out by utilizing POFA (Palm Oil Fly Ash) as aggregate substitution material for lightweight concrete materials. Because POFA (Palm Oil Fly Ash) has advantages such as increasing strength and hardness. The main component of palm shell ash is silica oxide (SiO2) which is active and reactive. Shrinkage is one of the problems that occurs when reduction of water in content causes structural changes at soil. The addition of a mixture of POFA (Palm Oil Fly Ash) to clay is one way to increase the carrying capacity of the soil by mechanical means. This research is expected to assist companies in utilizing production waste, as well as knowing new materials used as technical solutions for construction on soft soils. This research was conducted in several stages, the first was soil stabilization using POFA. Then soil and POFA can be used as lightweght concrete materials. With the aim of utilizing POFA which is waste to become light stockpile material. In this study, variations of mixing POFA with soil were used as much as 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, and 90% of the POFA used. By mixing 30% Palm Oil Fly Ash (POFA) and 70% soil the shrinkage problem has been resolved as indicated by the absence of cracks on the surface of the mixture. The mixture (V3-A) was then added with cement (OPC), water, blowing agent, additives, and rubber bitument emulsion with levels of 5%, 10% and 15% to produce lightweight concrete material. From the results of testing the characteristics of the lightweght material, it is known that the lightweight material in this study is classified as lightweight concrete material by calculating its density. From the compressive strength test it is known that the lightweght concrete material produced meets the standards according to the guidelines from the Ministry of PUPR. Based on the water absorption test, it is known that the lightweight concrete material produced has a relatively high absorption.