Abstract
Soil stabilisation is defined as a technique to improve the engineering characteristics in order to improve the parameters such as shear strength, compressibility, density, hydraulic conductivity. There are many techniques that can be used for different purposes by enhancing some aspects of soil behaviour and improve the strength and properties of soil. One of the cheapest techniques is by using Polyurethane grout, which is workable for construction and enhances the performance of soil compressive strength. Polyurethane (PU) foam is non-toxic, having an indefinite life span and non-environment unfriendly. PU is a chemical substance that normally used in polymer industries for instance resilience foam seating, rigid foam insulation panels and microcellular foam seals. In this research, different percentages of PU content are mixed with sand to test the compressive strength of modified sand. The compressive strength of sand is determined by conducting the Unconfined Compression Test (UCT) with the mold samples of 50mm diameter and 100mm height. The test determines the compressive strength and generates the stress-strain relationship of the modified sand. It is shown that the compressive strength of modified sand will gradually increase with an increasing PU content percentage (varying from 10% (20 kPa) – 95% (500 kPa). Conclusively, this research could be used as the benchmark of ground improvement technique.
Highlights
Most of the skyscrapers as such Tower of Pisa and Malaysian Leaning Tower of Teluk Intan, Perak are well-known due to their soil settlement awareness besides the aesthetic values of architectural aspects
This research is a laboratory based using PU and course sand which conducted with several laboratory testings.All the physical properties tests are conducted based on British Standard
Results and Discussion we will quantify the main parameters and their interactions that play an important role in influencing the strength characteristics of PU mixtures
Summary
Most of the skyscrapers as such Tower of Pisa and Malaysian Leaning Tower of Teluk Intan, Perak are well-known due to their soil settlement awareness besides the aesthetic values of architectural aspects. Settlement is referred to the movement of ground surface in the vertical downward displacement at the base of foundation. There are many factors that may contribute to the ground movements which prone to the structural failures. Most countries confronted with the unstable soil problems including Malaysia which causes an increment in construction costs for the treatment of unstable soil. The needs for the best solution of soil treatment for construction is studied to ensure the safety and achieve an economical design. It is proved that the soil replacement time frame is significantly reduced with the implementation of ground improvement techniques
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