Mix design for self-compacting palm oil clinker concrete based on particle packing Jegathish Kanadasan, Hashim Abdul Razak Self-compacting concrete (SCC) has progressively developed to become a concrete that is both efficient as well as providing a quality product without comprising its durability. Reduced labour needs, good surface finishing, extended workability and excellent hardened properties are some of the key elements of SCC. SCC is designed in a way that it will be able to flow under its own weight and produce good self compactability features without the need of any external vibration. The study of the particle packing (PP) gives a good understanding concerning the consumption of aggregate and paste volume for a given unit volume of concrete. Hence, optimisation of particle packing in SCC is vital to improve the flow behaviour and also enhance the hardened properties. Over the years, the application of lightweight self-compacting concrete (LSCC) has been progressing rapidly with proven versatility in the reduction of the dead load of the overall structure. The main concern of LSCC is the consumption of lightweight aggregate, which is usually lower in density coupled with high porosity. The agricultural industry has been a mainstay of the Malaysian economy for the past two decades with millions of hectares being planted with oil palm, rubber, paddy, sugar cane, coconut and cocoa. The extraction of useful material from these plants generates various types and forms of waste material, which need to be disposed of appropriately. Generally, they comprise ash, grains, wastewater, shells and large combined chunks. Malaysia is one of the largest producers and exporters of palm oil products to various corners of the world. Plenty of waste by-products are collected throughout the palm oil processing phases. One of them is palm oil clinker (POC), which is obtained in large chunks during the oil palm shell and fibre incineration process. Nowadays, POC is disposed of by landfill. This not only causes soil pollution but also