Open AccessThe Effect of Polyurethane Mix Ratio on the Strength of Polyurethane Treated Marine Clay
Author(s) -
J W Bak Sen,
Nor Zurairahetty Mohd Yunus,
Samaila Saleh,
Khursheed Ahmad,
Asma Rahim,
K Mat Said
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1144/1/012079
Subject(s) - polyurethane , compressive strength , isocyanate , materials science , composite material , polyol , atterberg limits , consolidation (business) , geotechnical engineering , geology , accounting , business , water content
Marine clay (MC) is recognised as an unfavourable soil in the construction field, given it continues to present problems of bearing capacity, consolidation, and settlements. In this paper, polyurethane was used to improve the properties of MC using a different mix ratio of polyol and isocyanate. The marine clay was characterised examining the particle size distribution (PSD), specific gravity (SG), Atterberg limits (AL), and performing standard proctor tests. Aside from that, an unconfined compressive test (UCT) was conducted to investigate the strength enhancement of treated marine clay (TMC) at various polyol to isocyanate mixing ratios. The UCT results indicated that the TMC could be effectively improved at the polyol to the isocyanate mixing ratio of 45:55. The unconfined compressive strength (UCS) of the MC consequently improved from 146 kPa to 286 kPa due to the addition of polyurethane. At the same time, the axial strain at failure decreased from 5.3% to 2.9% due to the treatment of the MC using polyurethane.