Effects of the addition of inertized MSW fly ash on calcium aluminate cement mortars

López-Zaldívar, O.; Lozano-Díez, Rafael Vicente; Vázquez, Amparo Verdú; Llauradó-Pérez, N.

doi:10.1016/j.conbuildmat.2017.09.189

Cited by 26 publications

(3 citation statements)

References 42 publications

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“…After 7-day curing age, the average 28-day compressive strength development of the treated mortar cubes increased slower. The same pattern of compressive strength development of mortar cubes with curing age is also observable from the published work of López-Zaldívar et al, [14]. The highest rate of average 28-day compressive strength development can be observed from the strength results of the treated mortar cubes with 4% DPLA and 2% date palm fibers as it is illustrated in Table 4 and Table 5 below respectively.…”

Section: Effect Of Curing Age On the Average 28-day Compressive Stren...supporting

confidence: 79%

Engineering Performance of Cement Mortar Cubes Containing Percentage of Date Palm Fibers and Leaf Ash

Ahmed

2023

ARASET

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The problem of conventional cement mortar cubes is the requirement of cement to be used for their production. It is recognized that cement production involves a significant release of carbon dioxide to the atmosphere, which is detrimental to the quality of the environment. To adopt a sustainable development of building materials, date palm tree has been used by numerous researchers to partially replace the cement in the production of mortar cubes. The study aims: 1. To optimize the engineering properties of cement mortar cubes enhanced with date palm fibers and leaves ash. 2. To investigate the microstructures and chemical characteristics of the optimized cement mortar enhanced with waste date palm fibers and leaves ash. The design optimization in this study, mortar cubes were formulated in such a way that the trial mix designs were varied with date palm leaves ash (1% to 10% date palm leaves ash as partial substitute of cement) and date palm, fibers (1% to 5% as partial substitute of silica sand). The mechanism of reaction at early- and long characterization tests studied term period of curing on paste, including water absorption test, Ultrasonic Pulse Velocity (UPV) test, compression test, SEM test, energy dispersive X-ray (EDX) test, X-ray and Fluorescence tests (XRF). As the study's major finding, it was realized that the optimal mix ratio of the treated mortar cubes was noticed to have 4% date palm leaves ash as partial cement substitute and 2% date palm fibers as partial silica sand substitute. There was significant improvement in the treated mortar cubes' engineering properties compared to those of the control mortar cubes. The study outcomes proved that both date palm leaves ash and fibers can cause pozzolanic activity and reinforcing effect on the treated mortar cubes.

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Section: Effect Of Curing Age On the Average 28-day Compressive Stren...supporting

confidence: 79%

Engineering Performance of Cement Mortar Cubes Containing Percentage of Date Palm Fibers and Leaf Ash

Ahmed

2023

ARASET

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“…The microfiber development in the kaolin and bentonite clays by heat improved the hydration of the cement [24]. The MSW materials can be used as cement materials [25][26][27][28][29][30][31], MSW fly ash, waste-derived hydrochars [29], alternative fuels and raw materials as waste management [30], and ground granulated blast furnace slag blended with bentonite [31] to accelerate and strengthen cement hydration. Such experimental work is referred to as cement-WGP-low-plasticity (CL) [32].…”

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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“…The compaction pressure is 28 N/mm 2, and the sintering temperature is 1140 • C. MSW was treated with a sintering time of 60 min, producing the favorable sintered material in making concrete [13], followed by Sikalidis [14], who studied and demonstrated the feasibility and advantages of this method in 2002. Similarly, researchers investigated the casting techniques on Supplementary Cementitious Materials (SCM) with MSW-BA [15], with different kinds of cement (calcium aluminate cement, asphalt cement, Portland cement) [16,17] and geopolymer to prepare mortar with MSW [18]. When MSW bottom ash is used as aggregate in the cement composite, the aluminum-induced hydrolysis reactions can lead to hydrogen gas generation, which can induce porosity and have a detrimental effect on the cement composite [19].…”

Section: Introductionmentioning

confidence: 99%

Utilization of Different Grain Size of Municipal Solid Waste Bottom Ash in High-Performance Mortars

Guo

Sharma

et al. 2022

Sustainability

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Globalization is bringing increased industrialization and municipal solid waste (MSW). This is a major concern in heavily populated areas. In order to reduce MSW generation, incineration is commonly used, resulting in two types of ashes: bottom and fly ash. Bottom ash is gathered at the incineration bed and is larger in mass than fly ash. To test the qualities of high-performance mortar, MSW-BA in three sizes (fine, medium, and coarse) was replaced with sand at three replacement levels of 10%, 20%, and 30%. The high-performance mortar integrating MSW-BA was tested for hardened density, mechanical properties such as compressive and flexural strength, resistance to NaOH solution, and heavy metal leaching. The substitution level of MSW-BA increased the hardened density of the mortar mixes. The volume change and residual strength of the mortar mixes were measured following exposure to the NaOH solution. Fine-particle mortar mixes shrank whereas medium- and coarse-particle mortar mixes expanded. The largest loss in flexural and compressive strength was recorded when 20% of sand was replaced with a fine fraction of MSW-BA. Heavy metals including cadmium and copper were not leached from MSW-BA combinations of any size. The minuscule amounts of lead and zinc discovered were well below acceptable limits. The present study illustrates the MSW-BA can be utilized as a substitute for sand in the development of high-performance mortar.

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Effects of the addition of inertized MSW fly ash on calcium aluminate cement mortars

Cited by 26 publications

References 42 publications

Engineering Performance of Cement Mortar Cubes Containing Percentage of Date Palm Fibers and Leaf Ash

Engineering Performance of Cement Mortar Cubes Containing Percentage of Date Palm Fibers and Leaf Ash

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

Utilization of Different Grain Size of Municipal Solid Waste Bottom Ash in High-Performance Mortars

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