Influence of water and frost on the performance of natural and recycled materials used in unpaved roads and road shoulders

Huber, Stefan T.; Henzinger, Christoph; Heyer, Dirk

doi:10.1016/j.trgeo.2019.100305

Cited by 13 publications

(12 citation statements)

References 54 publications

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“…The strength of the subbase was improved by using the geocell with the CD material. Similar conclusions about the use of CD materials in shoulders and unpaved roads were reported by Huber et al (2020). Sheikh and Shah (2020) carried out static plate load tests on the base layer of reclaimed asphalt pavement (RAP) that reinforced with geocell and geosynthetic.…”

Section: Introductionsupporting

confidence: 54%

Improvement in Field CBR Values of Subgrade Soil Using Construction-Demolition Materials

Al-Obaydi

Abdulnafaa

Atasoy

et al. 2021

Transp. Infrastruct. Geotech.

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Many countries suffer from the stacks of construction and demolition (CD) materials as they cause environmental and health problems in society. The city of Mosul in Iraq suffers from a huge amount of demolition materials resulting from destruction of most of the infrastructure. In the present study, attempts have been made to assess the influence of three types of CD materials (dragged asphalt, DA; crushed brick, CB; and crushed concrete, CC) on the response of a low-plasticity clay (CL) for use as a road subgrade layer. An intensive series of both experimental and numerical studies on the CL with 10% CD materials was carried out using field California bearing ratio (CBR) tests performed in a large-scale model box. The results showed significant improvement in the CBR values upon the addition of CD materials to the CL soil. The CBR values increased by 12.4, 13.7, and 49.7% with the addition of DA, CB, and CC, respectively. The CBR values improved between 1.1 and 1.7 times, corresponding to an increase in the layer thickness from 50 to 100 cm. Further increases in CBR values range from 1.5 to 1.8 times attendant with increasing the thickness of layer from 50 cm to 150 cm. The addition of CC is more active and gives higher CBR values. A good match was observed between the CBR values obtained from the experimental results and the numerical analysis using the PLAXIS 2D package.

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Section: Introductionsupporting

confidence: 54%

Improvement in Field CBR Values of Subgrade Soil Using Construction-Demolition Materials

Al-Obaydi

Abdulnafaa

Atasoy

et al. 2021

Transp. Infrastruct. Geotech.

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“…These engineering failures have been attributed to the high cost of excavating and replacing problematic soils with suitable materials and the strict legislative rules that govern the utilisation of these scarce natural resources for earthworks construction purposes. The adverse effect of rainfall-induced water ingress into pavement structural layers and its impact on the service life of flexible pavements and railway subgrades have been reported in recent literature [2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Although significant improvements in strength and stiffness of tropical residual soils treated with lime and other calcium-based additives have been reported, their durability and long-term stability under harsh environmental conditions have not been fully understood. Some researchers reported that the durability of chemically-stabilised soils tends to decrease with time under certain climatic conditions such as freeze-thaw cycles [9,49], wetting-drying cycles [50,51], and leaching via continuous water circulation [52,53]. Leaching-induced deterioration of chemically stabilised subbases and subgrades occurs as a result of rainfall-induced water ingress into pavement structural layers, which adversely modify the physicochemical characteristics of the stabilised material by the gradual removal of the chemical constituents of the stabiliser.…”

Section: Introductionmentioning

confidence: 99%

Appropriate Use of Lime in the Study of the Physicochemical Behaviour of Stabilised Lateritic Soil under Continuous Water Ingress

et al. 2020

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Lime stabilisation is one of the traditional methods of improving the engineering properties of lateritic soils for use as subgrade and foundation materials for the construction of road pavements and highway embankments. Understanding the mechanical performance of lime-stabilised lateritic subgrades in terms of their durability under continuous water ingress will improve environmental sustainability by conserving scarce natural resources and reducing the environmental impacts of repair and replacement of pavements. However, there are several conflicting reports on the durability of lime-stabilised soils subjected to continuous water ingress and harsh environmental conditions. Therefore, this paper evaluates the influence of leaching on the physicochemical behaviour and durability of lime-stabilised lateritic soil under continuous water ingress, simulating the typical experience in a tropical environment. Variations in the strength and durability of the lateritic soil at various lime contents (0, 2.5, 5, 7.5, 10, 15, and 20 wt.%) and soaking periods (3, 7, 14 and 28 days) were evaluated by performing the California bearing ratio tests before and after subjecting the lime-lateritic soil (LLS) samples to continuous leaching using two modified leaching cells. Furthermore, physicochemical analysis was performed to assess the variation of cation concentrations and changes in the physical properties of the pore fluid as the leaching time progressed from 3 to 28 days. The results show that the minimum strength reduction index of the soil corresponds to its lime stabilisation optimum (LSO). Electrical conductivity decreased monotonically and almost uniformly with an increase in leaching time, irrespective of lime content. So, too, was calcium concentration and to a lesser degree for pH and potassium concentration. Adverse changes in the physicochemical behaviour of the LLS samples occurred at lime contents below and slightly above the optimum lime content of the soil. Whereas permanent pozzolanic reactions occurred at lime contents above the LSO and thus resulted in a 45-fold increase in strength and durability. The results are significant for reducing the detrimental effect of the leaching-induced deterioration of flexible pavements founded on tropical floodplains.

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“…With this strong foundation, the project is well-positioned to deliver valuable insights and contribute meaningfully to the advancement of sustainable practices in the construction industry [79][80][81][82][83][84][85][86][87][88]. Recognized articles proof excellency on hydraulic-mechanical coupled processes in compacted fine-and mixed grained soils [89][90][91], recycled construction materials [92] and industrial by-products for the use in earthworks [93,94]. Published in geotechnical engineering [95][96][97][98][99][100][101][102][103], including works on the time-dependent behaviour of sands under oedometric compression [100], predicting soil water characteristic curves [102,103], and rate-and time-dependent mechanical behaviour of foam-grouted coarse-grained soils [98].…”

Section: Research Performance and Scientific Visibility Of Participat...mentioning

confidence: 99%

Recyclable and Efficient Construction using Mineral Landfill Materials and Demolition Wastes

Bühler¹,

Hollenbach²,

Michalski³

et al. 2023

Preprint

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An inter- and transdisciplinary concept has been developed, focusing on the scaling of industrial circular construction using innovative compacted mineral mixtures (CMM) derived from various soil types (sand, silt, clay) and recycled mineral waste. The concept aims to accelerate the systemic transformation of the construction industry towards carbon neutrality by promoting the large-scale adoption and automation of CMM-based construction materials, which incorporate natural mineral components and recycled aggregates or industrial by-products. In close collaboration with international and domestic stakeholders in the construction sector, the concept explores the integration of various CMM-based construction methods for producing wall elements in conventional building construction. Leveraging a digital urban mining platform, the concept aims to standardize the production process and enable mass-scale production. The ultimate goal is to fully harness the potential of automated CMM-based wall elements as a fast, competitive, emission-free, and recyclable alternative to traditional masonry and concrete construction techniques. To achieve this objective, the concept draws upon the latest advances in soil mechanics, rheology, and automation and incorporates open-source digital platform technologies to enhance data accessibility, processing, and knowledge acquisition. This will bolster confidence in CMM-based technologies and facilitate their widespread adoption. The extraordinary transfer potential of this approach necessitates both basic and applied research. As such, the proposed transformative, inter- and transdisciplinary concept will be conducted and synthesized using a comprehensive, holistic, and transfer-oriented methodology.

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Influence of water and frost on the performance of natural and recycled materials used in unpaved roads and road shoulders

Cited by 13 publications

References 54 publications

Improvement in Field CBR Values of Subgrade Soil Using Construction-Demolition Materials

Improvement in Field CBR Values of Subgrade Soil Using Construction-Demolition Materials

Appropriate Use of Lime in the Study of the Physicochemical Behaviour of Stabilised Lateritic Soil under Continuous Water Ingress

Recyclable and Efficient Construction using Mineral Landfill Materials and Demolition Wastes

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