Engineering properties improvement of clayey soil using rice husk ash and coconut shell for road works

• Main Authors: Basri M.H.H (Author), Goh L.D (Author), Hamid M.S.A (Author), Hassan S.H (Author), Idrus, J. (Author), Ng K.S (Author), Ramli, R. (Author), Shukur, N.A.A (Author), Walid, T.I.A.M (Author), Woo Y.P (Author)
• Format: Article
• Language: English
• Published: American Institute of Physics Inc. 2018
• Online Access: View Fulltext in Publisher; View in Scopus
• ISBN: 0094243X (ISSN); 9780735417380 (ISBN)
• DOI: 10.1063/1.5062656

In our country, the volume of waste generated from various ways has increased over years. Due to the large production of wastes, the world is facing serious problem to manage the disposal usage issue. One of the most attractive options of managing this problem is by using agricultural waste. These wastes can improve the strength of soil and helps the environment to be eco-friendly. This study is aimed to investigate the effect of Coconut Shell (CS) and Rice Husk Ash (RHA) on engineering properties as the expansive soil for roads' subgrade layer. The untreated soil of subgrade layer like clay and laterite soil was found to be in a low strength. The materials selected to be used in the road construction of subgrade must have the adequate strength and at the same time it must be economical and follow compaction's requirements. Therefore, this study gives an attempt to investigate the performance of soil mixed with CS and RHA. The proportion of constant 20% of RHA content mix with 4%, 6%, and 8% of CS correspondingly is examined with respect to compaction test and California Bearing Ratio (CBR) tests. The results obtained indicate an increase in optimum moisture content (OMC) and slight drop in the maximum dry density (MDD). The CBR value is found to increase appreciably with addition of CS and 20 % of RHA. Hence, the use of 20% of RHA and varying percentage of CS can be an advantage to improve soil engineering properties. © 2018 Author(s).