Improvement of mechanical strength of low-plasticity clay soil using geopolymer-based materials synthesized from glass powder and copper slag

Tajaddini, Arash; Saberian, Mohammad; Sirchi, Vahid Kamalzadeh; Li, Jie; Maqsood, Tariq

doi:10.1016/j.cscm.2022.e01820

Cited by 15 publications

(6 citation statements)

References 22 publications

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“…These industrial by-products display properties that enable them to react with calcium hydroxide, leading to the formation of cementitious compounds such as calcium silicate hydrates, which strengthen and add durability to concrete. Other contributing factors include improved particle packing [11], microstructural refinement [12][13][14][15], mitigation of alkali-silica reaction (ASR) [16][17][18], and enhanced curing and water retention [19,20]. Additionally, the potential bimetal activation due to the combination of copper and iron slag may produce synergistic effects that further enhance the concrete's physical properties [10].…”

Section: Test Resultsmentioning

confidence: 99%

Exploring Flexural Strength in High-Performance Concrete with Iron Slag and Copper Slag as Sand Substitutes

Ravindranatha,

Shenoy,

Sidharth

2024

RAiSE-2023

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Section: Test Resultsmentioning

confidence: 99%

Exploring Flexural Strength in High-Performance Concrete with Iron Slag and Copper Slag as Sand Substitutes

Ravindranatha,

Shenoy,

Sidharth

2024

RAiSE-2023

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“…To achieve the desired plasticity for shaping the formulation to suit various restoration scenarios and prevent rapid hardening, additives were visually monitored during the process. A Ca-based additive (Prompt) was used to control the plasticity of the mixture by reducing the liquid limit and increasing the plastic limit [25].…”

Section: Test Of Industrial Scale-up: Brick Masonry Mock-upmentioning

confidence: 99%

Creating Mortars through the Alkaline Activation of Ceramic Waste from Construction: Case Studies on Their Applicability and Versatility in Conservation

Fugazzotto,

Mazzoleni,

Stroscio

et al. 2024

Sustainability

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This paper aimed to investigate the possibility of using alkaline-based binders made from the industrial waste produced by ceramic tiles in the field of conservation and the restoration of monuments and archaeological heritage. Geopolymer mortars, which are environmentally sustainable products obtained by chemical consolidation at room temperature, are studied for their versatility in applications as reintegration or bedding mortars and pre-cast elements, namely bricks, tiles or missing parts for archaeological pottery, as an alternative to traditional not sustainable products. Starting from a well-established formulation, the function of the product, meaning its technical characteristics and its workability, was optimized by changing the aggregates used, by adding a Ca-rich compound or by changing the liquid/solid ratio with the use of tap water. The possibility of tailoring the finishing of the obtained products was also evaluated. X-ray diffraction analysis showed the influence of adding the additive with the presence of newly formed phases, which positively affect the product’s workability. On the contrary, no important variations were observed with the increase in the water content of the same formulation, opening up the possibility of managing it according to the required fluidity of the final product. Good results were observed, jumping above the laboratory scale and overcoming criticalities linked to the variabilities on site and the higher volume of materials used for industrial processes. The present research also demonstrates that ceramic-based geopolymers are suitable for application in a large variety of cultural heritage projects and with different purposes. Therefore, the paper encourages the use of alkali-activated mortars for green restoration, specifically given the wide range of ceramic materials.

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“…Waste glass powder [14,[17][18][19][20][21], high-density polyethylene and crushed glass powder mixture [22], calcium-carbide-glass-powder mixture [19], recycled glass powder and copper slag mixture [23], and recycled glass powder waste and dolomitic lime mixture [13] have been studied for the improvement of the mechanical properties and stabilization of soil. The microfiber development in the kaolin and bentonite clays by heat improved the hydration of the cement [24].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Cement Stabilization of Plastic Clay Using Ground Municipal Solid Waste: Enhancing Soil Properties for Geotechnical Applications

Baldovino,

Nuñez de la Rosa,

Namdar

2024

Sustainability

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The unconfined compressive strength (qu) weakness of low-compressibility clay (CL) reduces its structural safety. As part of the present study, waste glass powder (WGP) was mixed with Portland cement to improve the geotechnical properties of clayey soil, thus contributing to sustainability through the recycling of municipal waste. Based on the stiffness and chemical composite of WGP and cement, the adopted mixing ratio of the mixed soil was 10% and 20% WGP and 3% and 6% cement. The soil mixing ratio was selected and tested considering the percentage of the cement, WGP, water/cement ratio, dry unit weight, porosity of the specimen, and curing times of 7 days and 28 days. SEM-EDS tests were conducted to examine the impact of raw materials on the microstructural mixed soil. The results from SEM-EDS show that the cement–WGP–CL mixture caused different degrees of cementation and bonding products. Modifying multiple layers of water in the particle of the clay surface led to the enhancement of the interaction of the interlayer of hydrated clay, achieving the best unconfined compressive strength and stiffness of the designed specimen. From the viewpoint of unconfined compressive strength and stiffness enhancement, blending content of 20% WGP and 6% cement and dry unit weights compaction was recommended for stabilizing CL. The process of qu and stiffness improving CL involved an optimized mixing ratio and particle densification reaction efficiency. The soil’s qu and stiffness were predicted using ANN (artificial neural networks) and the porosity/cement index was predicted based on the experimental results.

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Improvement of mechanical strength of low-plasticity clay soil using geopolymer-based materials synthesized from glass powder and copper slag

Cited by 15 publications

References 22 publications

Exploring Flexural Strength in High-Performance Concrete with Iron Slag and Copper Slag as Sand Substitutes

Exploring Flexural Strength in High-Performance Concrete with Iron Slag and Copper Slag as Sand Substitutes

Creating Mortars through the Alkaline Activation of Ceramic Waste from Construction: Case Studies on Their Applicability and Versatility in Conservation

Sustainable Cement Stabilization of Plastic Clay Using Ground Municipal Solid Waste: Enhancing Soil Properties for Geotechnical Applications

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