Strength Characteristics Of Polyurethane (PU) With Modified Sand

Sidek, Norbaya; Mohamed, Kamaruzzaman; Jais, Ismacahyadi Bagus Mohamed; Bakar, Ilyani Akmar Abu

doi:10.4028/www.scientific.net/amm.773-774.1508

Cited by 13 publications

(6 citation statements)

References 1 publication

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“…The compressibility index will reduce when the polyurethane foam/resin is mixed with the sand. As stated in research done by Sidek et al [15], the coefficient of volume compressibility (mv) value of remediated soil is reduced when the addition of PU at 40%. Mohamed Jais et al [13] proves that the remediated soil with PU injection has experienced lower compressibility characteristics since the voids were filled with PU foam/resin with reduction of initial void ratio by almost 15%.…”

Section: Comparison Of Pko-bpu With Petroleum-based Polyurethane Foam...mentioning

confidence: 92%

Compressibility of Palm Kernel Oil-Based Polyurethane Foam Using Rowe Cell Apparatus for Ground Improvement

Salleh

Jais

Lat

et al. 2020

KEM

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Ground improvement methods are carried out to enhance the soil properties in order to ensure the unsuitable site locations with poor soil conditions can be developed for future development. Injection of lightweight material namely polyurethane foam is found to be one of the alternative methods that provide cost-effective and reliable techniques for ground improvement. Petroleum-based polyurethane is widely used in geotechnical application but nowadays the cost is getting more expensive due to high depleting rate and high production cost. Instead of using petroleum-based PU, this study is focusing on performance of palm kernel oil-based PU as an alternative method for ground improvement. The palm kernel oil-based polyurethane foam is anticipated to be more economical since it is produced from the renewable source, where it does not lead to permanent depletion of resources which has a limited global availability. The objective of this study is to determine the expansion and compressibility of palm kernel oil-based polyurethane with different mixing ratio. The samples were tested using Rowe cell apparatus to determine the compressibility, swelling index and pre-consolidation pressure of the polyurethane. The results of the finding show that the expansion and compressibility of the palm kernel oil-based polyurethane foam varies with the mixing ratio of isocyanate and polyol liquid. The compressibility index of PKO-BPU is found to be higher than petroleum-based polyurethane and low in expansion.

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Section: Comparison Of Pko-bpu With Petroleum-based Polyurethane Foam...mentioning

confidence: 92%

Compressibility of Palm Kernel Oil-Based Polyurethane Foam Using Rowe Cell Apparatus for Ground Improvement

Salleh

Jais

Lat

et al. 2020

KEM

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“…In addition, with the use of PU the bearing capacity of the soil is improved due to the expansion of voids between the soil particles [3]. Furthermore, the lightweight characteristics of PU allow a reduction of settlement rate and expansion characteristics of PU able to lift up the ground soil.…”

Section: Polyurethane (Pu) Foam Injection Systemmentioning

confidence: 97%

“…A green, sustainable and cost-effective technology is hereby tabled to address the issues of insufficient bearing capacities and differential settlement for roads in soft grounds and weak base area. Soil stabilization can be defined as an approach or technique in improving the existing ground soil through modification properties of engineering characteristics behaviour such as bearing capacity, stiffness, strength, density, compressibility as well as hydraulic conductivity [3]. This is to address long term consolidation and settlement, stability and bearing capacities for the foundation.…”

Section: Introductionmentioning

confidence: 99%

Road Maintenance Experience Using Polyurethane (PU) Foam Injection System and Geocrete Soil Stabilization as Ground Rehabilitation

Fakhar¹,

Asmaniza²

2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. There are many types of ground rehabilation and improvement that can be consider and implement in engineering construction works for soil improvement in order to prevent road profile deformation in later stage. However, when comes to road maintenance especially on operated expressways, not all method can be apply directly as it must comply to opreation's working window and lane closure basis. Key factors that considering ideal proposal for ground rehabilitation are time, cost, quality and most importantly practicality. It should provide long lifespan structure in order to reduce continuous cycle of maintenance. Thus, this paper will present two approaches for ground rehabilitation, namely Polyurethane (PU) Foam Injection System and Geocrete Soil Stabilization. The first approach is an injection system which consists two-parts chemical grout of Isocynate and Polyol when mixed together within soil structure through injection will polymerized with volume expansion. The strong expansion of grouting causes significant compression and compacting of the surrounding soil and subsequently improve ground properties and uplift sunken structure. The later is a cold in-place recyclying whereby mixture process that combines in-situ soil materials, cement, white powder (alkaline) additive and water to produce hard yet flexible and durable ground layer that act as solid foundation with improved bearing capacity. The improvement of the mechanical behaviour of soil through these two systems is investigated by an extensive testing programme which includes in-situ and laboratory test in determining properties such as strength, stiffness, compressibility, bearing capacity, differential settlement and etc.

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“…In 2015, Norbaya Sidek [96] conducted a laboratory experiment to study the properties of sand modified by polyurethane resin. Different samples were tested using the unconfined compression test.…”

Section: Laboratory Investigations Datamentioning

confidence: 99%

Soil Injection Technology Using an Expandable Polyurethane Resin: A Review

Sabri

Vatin

Alsaffar³

2021

Polymers

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The soil injection, using an expandable polyurethane resin, holds a unique potential for settlement compensation, lifting, and strengthening the foundations of existing buildings and structures. Although various research and case studies regarding this technology have been published, these studies emphasized the technology’s effectiveness in the rapid lifting process. Nevertheless, there is no complete understanding of the technology, yet, that gathers necessary data leading to a better recognition for this technology in the theoretical understanding and the practical applications. This article aims to provide a comprehensive understanding of this technology. The injection process, the resin’s mechanism, and actual propagation in the soil’s massive, the modified physic-mechanical properties of the soil, the expansion process, the consumption of the resin, and the durability are extensively reviewed in this article. Besides that, this article aims to demonstrate the advantages and limitations of this technology in practical applications. The review also explores the existing finite element models used to calculate the strength and stiffness parameters, evaluating the bearing capacity of the composite (soil-resin) and the settlement after the injection process.

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Strength Characteristics Of Polyurethane (PU) With Modified Sand

Cited by 13 publications

References 1 publication

Compressibility of Palm Kernel Oil-Based Polyurethane Foam Using Rowe Cell Apparatus for Ground Improvement

Compressibility of Palm Kernel Oil-Based Polyurethane Foam Using Rowe Cell Apparatus for Ground Improvement

Road Maintenance Experience Using Polyurethane (PU) Foam Injection System and Geocrete Soil Stabilization as Ground Rehabilitation

Soil Injection Technology Using an Expandable Polyurethane Resin: A Review

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