Sains Malaysiana 46(4)(2017): 667–675

http://dx.doi.org/10.17576/jsm-2017-4604-20

 

High Strength Lightweight Aggregate Concrete using Blended Coarse Lightweight Aggregate Origin from Palm Oil Industry

(Konkrit Agregat Ringan Kekuatan Tinggi menggunakan Gabungan Kasar Ringan Agregat Asal daripada Industri Minyak Sawit)

 

MUHAMMAD ASLAM^1*, PAYAM SHAFIGH^2,3 & MOHD ZAMIN JUMAAT¹

 

¹Department of Civil Engineering, Faculty of Engineering, University of Malaya

50603 Kuala Lumpur, Federal Territory, Malaysia

 

²Department of Building Surveying, Faculty of Built Environment, University of Malaya

50603 Kuala Lumpur, Federal Territory, Malaysia

³Center for Building, Construction & Tropical Architecture (BuCTA), Faculty of Built Environment, University of Malaya, 50603 Kuala Lumpur, Malaysia

 

Received: 4 September 2015/Accepted: 14 October 2016

 

ABSTRACT

The benefits of using structural lightweight concrete in construction industry, particularly in high rise buildings, over normal weight concrete are numerous. The main method of producing structural lightweight concrete is the use of lightweight aggregates instead of ordinary aggregates in concrete. Due to the limited resources for natural and artificial lightweight aggregates, the alternative sources for lightweight aggregates should be discovered from industrial wastes. Oil palm shell (OPS) and oil-palm-boiler clinker (OPBC) are two solid wastes from palm oil industry and are available in abundance in tropical regimes. The use of just OPS as coarse lightweight aggregate in concrete mixture has some drawbacks for concrete. The aim of this study was to investigate engineering properties of a lightweight concrete containing both of these aggregates. For this purpose, in this study, 50% (by volume) of OPS was replaced with OPBC in an OPS lightweight concrete. The test results showed that when OPS was substituted with OPBC, significant improvement was observed in the compressive, splitting tensile and flexural strengths. In addition, initial and final water absorption as well as drying shrinkage strain of blended coarse lightweight aggregate concrete were significantly less than OPS concrete.

 

Keywords: Clinker; drying shrinkage; lightweight aggregate; mechanical properties; oil palm shell

 

 

ABSTRAK

Terdapat banyak faedah menggunakan struktur konkrit ringan dalam industri pembinaan, terutamanya pada bangunan tinggi, berbanding konkrit biasa. Kaedah utama menghasilkan struktur konkrit ringan adalah penggunaan agregat ringan dan bukannya biasa agregat dalam konkrit. Oleh kerana sumber yang terhad untuk agregat ringan yang asli dan tiruan, sumber alternatif untuk agregat ringan harus diterokai daripada sisa industri. Tempurung kelapa sawit (OPS) dan klinker dandang kelapa-sawit (OPBC) adalah dua sisa pepejal daripada industri minyak sawit dan didapati dengan banyaknya dalam rejim tropika. Penggunaan OPS sahaja sebagai agregat ringan kasar dalam campuran konkrit mempunyai beberapa kelemahan untuk konkrit. Tujuan kajian ini adalah untuk mengkaji sifat kejuruteraan konkrit ringan yang mengandungi kedua-dua agregat ini. Bagi tujuan kajian ini, 50% (isi padu) daripada OPS telah digantikan dengan OPBC untuk konkrit ringan OPS. Keputusan ujian menunjukkan apabila OPS digantikan dengan OPBC, peningkatan ketara diperhatikan di dalam mampatan, pemecahbelahan tegangan dan kekuatan lenturan. Di samping itu, serapan awal dan akhir air serta strain pengecutan kering konkrit campuran kasar agregat ringan adalah jauh berkurangan daripada konkrit OPS.

 

Kata kunci: Agregat ringan; klinker; pengecutan kering; sifat mekanik; tempurung kelapa sawit

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*Corresponding author; email: bhanbhroma@gmail.com