Performance-based re-use of tunnel muck as granular material for subgrade and sub-base formation in road construction

Riviera, Pier Paolo; Bellopede, Rossana; Marini, Paola; Bassani, Marco

doi:10.1016/j.tust.2013.10.002

Cited by 49 publications

(18 citation statements)

References 10 publications

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“…Using the excavated geomaterials is beneficial from economic, environmental and social points of views (Chittoori et al, 2012;Petkovic, 2005;Riviera et al, 2014); energy consumption reduction and limited greenhouse gas emissions are the most beneficial advantages (Aatheesan et al, 2008;Arulrajah et al, 2013;Gomes Correia et al, 2016;Núñez et al, 2008). The usage of blasted materials in pavement applications is a sustainable solution to minimise the waste while reducing the demand for scarce quarried materials, activity which is resource intensive and consumes large amounts of energy (Fladvad et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Innovative stabilization techniques for weak crushed rocks used in road unbound layers: A laboratory investigation

Barbieri

Hoff

Mørk

2019

Transportation Geotechnics

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The "Ferry-free coastal highway route E39" project includes building several long tunnels along the southwestern Norwegian coast. The tunnelling operations will generate a large quantity of blasted rocks; these could be used in the road unbound layers close to the place of production to provide a sustainable cost-benefit application. The existing design guidelines define strength requirements for road unbound layers in terms of Los Angeles and micro-Deval tests. Even if the major part of the rocks has igneous origin and could potentially fulfil the standard tests, the damage induced by the confined heavy blasting makes the materials fail the check procedures. The research investigates how to enable the use of the "weak" rocks by investigating three possible techniques. The first approach is the mixture between the different types of rocks available in situ. The second approach is additive application; two different nontraditional additive types are examined: one is polymer-based, the other one is lignin-based. The third approach is the attempt to modify the rocks mineralogical structure by overheating. The research test campaign uses both the aforementioned standard tests and repeated triaxial load tests. Rocks mixture and additives application are viable and sustainable methods to improve the mechanical properties of the "weak" crushed metamorphic rocks. Overheating does not turn out to be an effective and convenient procedure.

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Section: Introductionmentioning

confidence: 99%

Innovative stabilization techniques for weak crushed rocks used in road unbound layers: A laboratory investigation

Barbieri

Hoff

Mørk

2019

Transportation Geotechnics

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“…Given the low cement contents adopted for the preparation of the FTB mixtures, such a curing period was considered to be sufficient for the development of most of the time-dependent hardening phenomena occurring in service and therefore adequate for the assessment of the long-term bearing capacity of these materials. The M r test is commonly employed for the evaluation of the stress-strain response of granular materials under the effects of traffic loading [46][47][48][49][50][51][52]. However, it has also been used successfully for the assessment of the mechanical behavior of cement-treated and cold-recycled bituminous mixtures [51][52][53][54].…”

Section: Test Methodsmentioning

confidence: 99%

Performance-Related Assessment of the Potential Use of Sawing Sludge in Cementitious Fluidized Thermal Backfills

et al. 2020

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The management of sawing sludge originated from cutting operations of ornamental stones represents a challenging task as a consequence of its peculiar composition that includes non-negligible amounts of heavy metals resulting from the wear and tear of cutting tools. The aim of the research work presented in this paper was to investigate the feasibility of using these by-products as supplementary constituents of cementitious mixtures employed for the formation of Fluidized Thermal Backfills (FTB). These mixtures are designed and produced for filling operations in pavement subgrades in which high-voltage electrical transmission cables are buried for protection purposes. Two different types of sawing sludge were thoroughly analyzed from a physical and chemical point of view and thereafter employed for the laboratory production of four FTB mixtures. Then, these were subjected to thermal, mechanical, and environmental tests in order to verify their suitability for their intended use. All investigated FTB mixtures exhibited a satisfactory and stable thermal conductivity, and they also displayed enhanced stiffness properties in comparison to standard subgrade and sub-base materials. Controversial results were obtained with respect to environmental properties resulting from leaching tests, thus suggesting that further investigations are needed before any full-scale application can take place.

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“…Information such as classification and quantity of excavated waste cannot be accurately obtained in the early stages of construction, which is not conducive to the orderly and coordinated development of excavated waste reuse, recycle, and disposal (Diana et al 2015;Riviera et al 2014). It is of great significance for the whole construction industry to realize low-carbon and environmental protection development to fully recycle the excavated waste.…”

Section: Introductionmentioning

confidence: 99%

Quantitative methods for predicting underground construction waste considering reuse and recycling

Chen

Yang

et al. 2021

Environ Sci Pollut Res

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The construction industry has been greatly developed in the past few decades, especially in the extensive use of underground space. The increasing amount of waste (e.g., soil, sludge, and rock) generated in the underground construction constitutes an important part of construction and demolition waste (CDW) but the related problems are rarely addressed in an independent quantitative study. In order to facilitate recycling of underground construction waste (UCW), quantitative methods for predicting UCW are proposed based on mass conservation in this study. Through on-site investigation and literature review, the source characteristics of UCW and corresponding recycling potential are firstly analyzed. Secondly, the corresponding quantitative mothed is proposed for predicting each type of UCW according to the principle of mass conservation. Finally, the proposed quantitative methods are applied in two real underground infrastructure projects to verify the accuracy. The results show that the accuracy of quantitative methods for predicting shield sludge and engineering soil is 82.03%-95.79% and 94.49% respectively. In addition, detailed geological and geotechnical analysis is the key to accurate management of waste generated in underground civil and infrastructure projects. In both cases, underground construction produced a large amount of construction waste with great recycling potential. UCW can theoretically reach 100% recycling, and full reuse and recycling of UCW will bring huge economic value and be conducive to the sustainable development of the construction industry.

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Performance-based re-use of tunnel muck as granular material for subgrade and sub-base formation in road construction

Cited by 49 publications

References 10 publications

Innovative stabilization techniques for weak crushed rocks used in road unbound layers: A laboratory investigation

Innovative stabilization techniques for weak crushed rocks used in road unbound layers: A laboratory investigation

Performance-Related Assessment of the Potential Use of Sawing Sludge in Cementitious Fluidized Thermal Backfills

Quantitative methods for predicting underground construction waste considering reuse and recycling

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