Soil treatment with organic non-traditional additives for the improvement of earthworks

Blanck, Gaëtan; Cuisinier, Olivier; Masrouri, Farimah

doi:10.1007/s11440-013-0251-6

Cited by 78 publications

(27 citation statements)

References 25 publications

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“…Nevertheless, it is widely accepted that any effective changes will be measurable after 7 days. In this study, the 28-day curing time is prescribed just to compare the difference between the short-and long-term behaviours of the stabilized soils (Chang and Cho 2012;Zhang et al 2012;Sukmak et al 2013;Blanck et al 2013). …”

Section: Sample Preparationmentioning

confidence: 99%

Time-dependent physicochemical characteristics of Malaysian residual soil stabilized with magnesium chloride solution

et al. 2015

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The effects of non-traditional additives on the geotechnical properties of tropical soils have been the subject of investigation in recent years. This study investigates the strength development and micro-structural characteristics of tropical residual soil stabilized with magnesium chloride (MgCl 2 ) solution. Unconfined compression strength (UCS) and standard direct shear tests were used to assess the strength and shear properties of the stabilized soil. In addition, the micro-structural characteristics of untreated and stabilized soil were discussed using various spectroscopic and microscopic techniques such as X-ray diffractometry (XRD), energydispersive X-ray spectrometry (EDAX), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR) and Brunauer, Emmett and Teller (BET) surface area analysis. From the engineering point of view, the results indicated that the strength of MgCl 2 -stabilized soil improved noticeably. The degree of improvement was approximately two times stronger than natural soil after a 7-day curing period. The results also concluded the use of 5 % of MgCl 2 by dry weight of soil as the optimum amount for stabilization of the selected soil. In addition, the microstructural study revealed that the stabilization process modified the porous network of the soil. The pores of the soils had been filled by the newly formed crystalline compounds known as magnesium aluminate hydrate (M-A-H).

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Section: Sample Preparationmentioning

confidence: 99%

Time-dependent physicochemical characteristics of Malaysian residual soil stabilized with magnesium chloride solution

et al. 2015

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“…Indeed, for standard compaction energy, higher density can be reached via the use of non-traditional additives. This phenomenon is directly linked with surfactant properties of both tested additives as demonstrated in different research (Peck 1963;Berney et al 2003;Park et al 2006;Blanck et al 2014).…”

Section: Determination Of the Benefits Of The Treatment With The Non-mentioning

confidence: 60%

“…A detailed study on the effects of the selected nontraditional products on geotechnical characteristics of soils is available in Blanck et al (2014), in which the aspects related to the stabilisation mechanisms were also considered. In this paper, the emphasis is put on the alteration of the compaction characteristics of the soil that would be of interest in earthworks.…”

Section: Determination Of the Benefits Of The Treatment With The Non-mentioning

confidence: 99%

“…However, it was shown in a specific study that this product alters the compaction characteristics of soils owing to its surfactant properties (Blanck et al 2014). It was also demonstrated that the effects of the treatment with the enzymatic product are equivalent to those of a common surfactant, sodium dodecyl sulphate (SDS).…”

Section: Origin Of Lci Datamentioning

confidence: 99%

“…The LCIA results showed that for the enzymatic treatment, the principal benefit of the product is to make the compaction easier. It was also shown in a specific study that the product is totally biodegraded a few days after mixing with the soil (Blanck et al 2014). Because the product is used in very small quantities (0.002 % by dry weight of soil) and mainly enhanced with renewable raw materials, the impact of its degradation is considered to be negligible.…”

Section: Influence Of System Boundariesmentioning

confidence: 99%

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Life cycle assessment of non-traditional treatments for the valorisation of dry soils in earthworks

Blanck

Cuisinier

Masrouri

2016

Int J Life Cycle Assess

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Purpose Sustainable development principles are leading earthwork companies to use all-natural materials extracted from the construction site to build the infrastructure. Natural materials with low characteristics must be improved. For dry soils, the common solution is to increase the compaction energy or add important quantities of water to reach the target dry density and bearing capacity. To reduce the environmental impact of their activities, the use of industrial organic products has been proposed. The aim of this study was to assess the potential benefits that could be expected from the use of these non-traditional treatments in earthworks with a wellrecognised environmental impact assessment methodology. Methods Three non-traditional products were selected as follows: an acid solution (AS), an enzymatic solution (ES) and a calcium lignosulfonate (LS). For each of these categories, geotechnical properties such as compaction, bearing capacity, unconfined compressive strength and stiffness were first determined. Based on these results, the construction strategy for which non-traditional additives lead to greater improvement of soil properties was defined. The environmental balance of each option was then determined via a comparative process life cycle assessment study that considered ten impact categories. Results and discussion An experimental study showed the ability of enzymatic and lignosulfonate additives to improve soil characteristics with significant savings of water at the construction stage. The purpose of the study was also to compare the global environmental impact of each treatment strategy defined from laboratory investigations. The life cycle assessment results showed that some construction strategies lead to a significant reduction in the environmental impact compared with the reference strategy. However, these environmental improvements are strongly linked to the choice of the construction strategy and site conditions as discussed in the sensitivity analysis. Conclusions Within the three tested non-traditional additives, enzymatic and lignosulfonate treatments showed an association of technical and environmental interest for the compaction of dry soils. As demonstrated in the sensitivity analysis, these benefits are achieved when the production and transport steps have limited environmental impact. Thus, despite an important transportation distance for enzymatic additive, the small quantities that must be used (0.002 % by dry weight) have a limited contribution on the global environmental impact. In contrast, the production step strongly impacts the treatment with lignosulfonates. Moreover, environmental interest remains strongly dependent on the site conditions and construction strategy, which is why the adopted methodology can accurately perform an initial evaluation before implementing a soil treatment with a non-traditional product.

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Impact of Soil Property in Selection of Stabilisation Technique—A Review

Jangde,

Khan,

Ansari

et al. 2023

Lecture Notes in Civil Engineering

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Soil treatment with organic non-traditional additives for the improvement of earthworks

Cited by 78 publications

References 25 publications

Time-dependent physicochemical characteristics of Malaysian residual soil stabilized with magnesium chloride solution

Time-dependent physicochemical characteristics of Malaysian residual soil stabilized with magnesium chloride solution

Life cycle assessment of non-traditional treatments for the valorisation of dry soils in earthworks

Impact of Soil Property in Selection of Stabilisation Technique—A Review

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