A study on the characteristics of palm-based polyurethane as a lightweight aggregate in concrete mix

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Research on the development of lightweight concrete (LWC) utilizing wastes and natural resources as lightweight aggregates (LWA) is increasingly gaining attention worldwide due to sustainable and environmental concerns. A new alternative is using palm kernel oil polyol (PKO-p)-based polyurethane (PU) as filler. Rigid PU is a block copolymer comprised of a monomeric PKO-p and 2, 4-methylene diphenyl diisocyanate (crude MDI). The property of PKO-p, its ratio with crude MDI and reaction time were determined. The reaction time showed the average of 60 s for cream time and 95 s for rise time with maximum hardening time of 8 min. The reaction between PKO-p to MDI at 1:1 ratio resulted in a very short hardening time (within 2 min). The compressive strength of the rigid PU was at 7.0 MPa at a density of 206 kg/m<sup>3</sup>. Further increase in the amount of PKO-p increased the density and compressive strength of the PU. PU aggregate in the concrete mixture was added at 1 to 5% (w/w) to obtain concrete with density of less than 1800 kg/m<sup>3</sup>. The resulting concrete has excellent compressive strength (17.5 MPa) and thermal conductivity (0.24 W/mμK). The results showed that physical properties of PU played the most significant effect on the physical and mechanical properties of the lightweight concrete.

Original languageEnglish
Pages (from-to)771-778
Number of pages8
JournalSains Malaysiana
Volume44
Issue number6
Publication statusPublished - 1 Jun 2015

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Concrete mixtures
Palm oil
Polyols
Polyurethanes
Concretes
Compressive strength
Hardening
Physical properties
Natural resources
Block copolymers
Fillers
Thermal conductivity
Mechanical properties

Keywords

  • Concrete mix
  • Lightweight aggregate
  • Palm kernel oil polyol
  • Rigid polyurethane

ASJC Scopus subject areas

  • General

Cite this

A study on the characteristics of palm-based polyurethane as a lightweight aggregate in concrete mix. / Mohd Sari, Kamarul Aini; Mat, Sohif; Badri, Khairiah; Mohd. Zain, Muhammad Fauzi.

In: Sains Malaysiana, Vol. 44, No. 6, 01.06.2015, p. 771-778.

Research output: Contribution to journalArticle

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