Enhancing Soft Clay Properties Treated with Palm Oil Fuel Ash (POFA) and Lime

EasyChair Preprint 4790

Abstract

Malaysia is one of the largest palm oil producers in the world, palm oil fuel ash is produced also in huge quantities. The unavoidable produced waste should be exploited as an economically effective product, which can contribute to generating new income for a project such as soil stabilization which is the most economical way to improve the properties of soil. Therefore, POFA is the unwanted material in the form of ash from burning palm oil fibers. This paper presents the utilization of POFA with the addition of lime as an additive mixture to stabilize kaolin, the results of the basic physical properties, standard compaction test, and unconfined compression test by admixture method of kaolin, quicklime, and POFA standardized with ASTM & BS standards. The effect on the compressive strength result of the kaolin with the admixture of lime, POFA, or both. It indicates that the reason behind the increment in the strength of kaolin is the pozzolanic reaction and cementation process which occur due to the high silica content of POFA and clay soil that was reacted with lime. The results presented that the optimal percentage of lime and POFA combination was attained 4% of lime and 2% of POFA. In conclusion, the highest shear strength achieved was 77.26 kPA while the improvement of undrained shear strength obtained was 37.31 kPa which shows apparent enhancement on soil strength.

Keyphrases: Lime, POFA, Soil stabilization, UCT, compressive strength, soft clay, waste

@booklet{EasyChair:4790,
  author    = {Nur Amalina Mohd Hizam and Muzamir Hasan and Abdulmajeed Ali Alhokabi and Muhammad Syamsul Imran Zaini},
  title     = {Enhancing Soft Clay Properties Treated with Palm Oil Fuel Ash (POFA) and Lime},
  howpublished = {EasyChair Preprint 4790},
  year      = {EasyChair, 2020}}