Influence of wetting fluids on the compressive strength, physicochemical, and pore-structure evolution in lime-treated silty soil subjected to wetting and drying cycles

Das, Geetanjali; Razakamanantsoa, Andry; Herrier, Gontran; Deneele, Dimitri

doi:10.1016/j.trgeo.2022.100798

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…The evolution of the microstructure parameters generated by the addition of activators and their impacts on the evolution of the mechanical performance of WSA+GGBS are discussed in detail in the present study. Considering the recent study on lime-treated soil [26][27][28][29], the effects of the physical-chemical reactions on the mechanical performance of WSA+GGBS are expected to be similar to those of Das et al [26][27][28][29]. The microstructure modification due to the physical-chemical reactions in place is expected to be observed through the evolution of the specific surface of the matrix, the shape of the adsorption isotherms and the evolution of the pore distribution in the compacted matrix.…”

Section: Introductionmentioning

confidence: 61%

Microstructure of Dry Mortars without Cement: Specific Surface Area, Pore Size and Volume Distribution Analysis

et al. 2023

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The evolution of the microstructure of the wastepaper sludge ash-based dry-mortar mixtures is characterized. Mixtures have been prepared with a large volume of wastepaper sludge ash (WSA) and ground granulated blast-furnace slag (GGBS) as a binder matrix mixed with water. Two ratios of water/binder (w/b) = 0.5 and 0.6 were selected. Both of these two industrial by-products are well-known as supplementary cementitious materials in the construction industry and they constitute a convenient replacement for cement. A series of these dry mortars for two ratios w/b were activated by three different chemical activators. They were placed in 4 × 4 × 16 cm3 molds and then compacted at the same compaction energy of 600 kN·m/m3. The influence of water quantity, compaction level and activators on the microstructure of these mortars was investigated by measuring the specific surface area, pore size and volume. Different series of samples have been compared in terms of adsorption/desorption hysteresis and pores network. The influences of water quantity and energy level were first discussed on non-activated dry mortars and this analysis led to the selection of an optimal energy for the comparative study of activated dry mortars. A significant difference in behavior was observed between the studied activators in terms of specific surface area, adsorption property and pore distribution. Then, the microstructure of the three activated dry mortars is observed and analyzed considering the two w/b ratios, the mechanical strength obtained and the type and dosage of activator used. Dry mortars show micropores regardless the quantity of water and the dosage of activator.

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Section: Introductionmentioning

confidence: 61%

Microstructure of Dry Mortars without Cement: Specific Surface Area, Pore Size and Volume Distribution Analysis

et al. 2023

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“…For Series 1, the core samples were carefully sliced into smaller intact specimens (approximately 9 mm and below). The specimens were immediately collected to maintain the initial conditions of the material, and the aluminum caps were filled to evaluate the total suction using a potentiometer (WP4C, METER Group) and the water content [64][65][66][67]. The use of WP4C for rapid total suction monitoring was effectively carried out to evaluate the hydraulic behavior of the unsaturated soils [68,69] and stabilized soils [65,70].…”

Section: Methodsmentioning

confidence: 99%

Experimental Validation of the Cementation Mechanism of Wood Pellet Fly Ash Blended Binder in Weathered Granite Soil

Balagosa,

Lee,

Choo

et al. 2023

Materials

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In response to climate change, wood pellets have been increasingly utilized as a sustainable energy source. However, their growing utilization increases the production of wood pellet fly ash (WA) by-products, necessitating alternative recycling technologies due to a shortage of discharging landfills. Thus, this research seeks to utilize WA by developing a new sustainable construction material, called wood pellet fly ash blended binder (WABB), and to validate its stabilizing performance in natural soils, namely weathered granite soil (WS). WABB is made from 50% WA, 30% ground granulated blast-furnace slag (GGBS), and 20% cement by dry mass. WS was mixed with 5%, 15%, and 25% WABB and was tested for a series of unconfined compressive strength (qu), pH, and suction tests at 3, 7, 14, and 28 days. For the microstructural analyses, XRD, SEM, and EDS were employed. As the WABB dosage rate increased, the average qu increased by 1.88 to 11.77, which was higher than that of compacted WS without any binder. Newly cementitious minerals were also confirmed. These results suggest that the effects of the combined hydration mechanism of WABB are due to cement’s role in facilitating early strength development, GGBS’s latent hydraulic properties, and WA’s capacity to stimulate the alkaline components of WABB and soil grains. Thus, this research validates a new sustainable binder, WABB, as a potential alternative to conventional soil stabilizers.

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Study on the macro-microscopic mechanical properties of saline soil stabilized by ionic agent and inorganic materials in cold regions

Yan,

Chang,

Liu

et al. 2024

Construction and Building Materials

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Influence of wetting fluids on the compressive strength, physicochemical, and pore-structure evolution in lime-treated silty soil subjected to wetting and drying cycles

Cited by 6 publications

References 33 publications

Microstructure of Dry Mortars without Cement: Specific Surface Area, Pore Size and Volume Distribution Analysis

Microstructure of Dry Mortars without Cement: Specific Surface Area, Pore Size and Volume Distribution Analysis

Experimental Validation of the Cementation Mechanism of Wood Pellet Fly Ash Blended Binder in Weathered Granite Soil

Study on the macro-microscopic mechanical properties of saline soil stabilized by ionic agent and inorganic materials in cold regions

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