Characterization of foamed-bitumen stabilisation

Ramanujam, J; Jones, Justin Daniel

doi:10.1080/10298430601149676

Cited by 45 publications

(33 citation statements)

References 1 publication

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“…The advantages and disadvantages of using foam bitumen stabilising compared to other type of stabilising techniques are highlighted by several researchers [6] [7]. The key advantages of using FBS are listed below:…”

Section: Advantages Of Using Fbsmentioning

confidence: 99%

“…Therefore, experts argued that using lime instead of cement would defiantly increase working time. Furthermore, using lime has the following advantages [7]: stiffens the bitumen binder, acts as anti-stripping agent, increases the initial strength of the material, and has a longer working time (up to 24 hours if need to rework). Therefore with the consultation of design engineers, lime has been proposed as a secondary agent.…”

Section: Changes To Base Layer Designmentioning

confidence: 99%

“…With the foamed bitumen stabilisation it is essential that adequate fines must be available for the bitumen to bind with [7]. As per the material classification in Main Roads Technical Specification (MRTS), Type 2.5 and Type 2.3 material with 'C' grading can satisfy the requirement of a foam stabilisation works [11].…”

Section: Materials Identification From MIX Designmentioning

confidence: 99%

“…Expansion ratio is defined as being the ratio between the maximum achieved volume of the foamed bitumen and the original volume of the non-foamed bitumen [8]. Half-life of the bitumen is defined as time taken for the volume of foamed bitumen to settle to half of the maximum volume [7]. The type of foam most effective is one which has an expanded volume of 10 to 15 when injecting one to two percent of water to the hot bitumen [12].…”

Section: Key Requirementsmentioning

confidence: 99%

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Rehabilitation Works in Queensland Using Foamed Bituminous Stabilisation

Logitharan¹,

Somasundaraswaran²,

Ramanujam³

2015

geomate

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Adapting foamed bitumen stabilisation is considered as the most cost effective approach in Queensland to expedite the rehabilitation works, especially after the major flood devastation in 2011. This paper presents the key changes made as well as the recent practices adapted during a road rehabilitation work to increase the return from the investment. In this process, initially, the designed width for subgrade lime stabilisation has been modified to minimize the moisture entry into the pavement. The dry modulus, three days soaked resilient modulus and retain modulus were used to identify the suitable base material for construction. In addition, a trail site was used to examine the bulking effect on base layer when adding lime as secondary agent, which helped to estimate the exact depth for foamed stabilisation. A few innovative techniques such as a two-layer compaction to effectively condense stabilised subgrade, was used to improve the quality of the outcome were also highlighted.

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Section: Advantages Of Using Fbsmentioning

confidence: 99%

Section: Changes To Base Layer Designmentioning

confidence: 99%

Section: Materials Identification From MIX Designmentioning

confidence: 99%

Section: Key Requirementsmentioning

confidence: 99%

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Rehabilitation Works in Queensland Using Foamed Bituminous Stabilisation

Logitharan¹,

Somasundaraswaran²,

Ramanujam³

2015

geomate

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“…Past research findings also suggest that the indirect tensile fatigue test is too conservative a test for evaluating the fatigue life of cold bituminous mixtures due to their high void content (Jenkins et al, 2002;Van de Ven et al, 2007). Furthermore, for cold bituminous mixtures it is difficult to manufacture beams for beam fatigue tests (Long and Theyse, 2004;Long et al, 2002;Ramanujam and Jones, 2007). Even if foamed bituminous mixture beams have been made without excessive aggregate loss during saw cutting, the variability of test results has been found to be very high using beam fatigue tests (Long et al, 2002;Ramanujam and Jones, 2007).…”

Section: Introductionmentioning

confidence: 99%

Structural design of pavements incorporating foamed bitumen mixtures

Kuna

Airey

Thom

2018

Proceedings of the Institution of Civil Engineers - Constructio

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This paper presents a rational structural design methodology termed the 'cumulative damage approach' for road, port and airport pavements incorporating cold bituminous mixtures with foamed bitumen. This has been developed along with a laboratory test, the uniaxial indirect tensile test, to evaluate the fatigue characteristics of these mixtures. The test was developed with a view to addressing the limitations of conventional fatigue tests for foamed bitumen mixtures. The new design approach takes account of the actual stiffness evolution of the mixtures obtained from the fatigue test. It is compared with a traditional approach for conventional flexible pavements, which is based on pavement life as a function of computed tensile strain in the material and interpretation of fatigue data in a conventional way. The results show that the traditional design approach yields conservative outcomes for pavements with foamed bitumen mixtures if the same transfer function or shift factor used for hot mix asphalt is applied. The results also show that if all factors other than induced load influence are the same, the shift factor for foamed bitumen mixtures could be 25-35% higher than for hot mix asphalt.

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