Improvement of CBR value in soil subgrade using garnet waste

Sani, W. N. H. M.; Mohamed, Ahmad Kilani; Khalid, Nur Hafizah A.; Nor, Hasanan Md.; Hainin, Mohd Rosli; Giwangkara, Grawira Ganjur; Hassan, Norhidayah Abdul; Kamarudin, Norhaya; Mashros, Nordiana

doi:10.1088/1757-899x/527/1/012060

Cited by 6 publications

(4 citation statements)

References 3 publications

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“…As a result of these observations, the idea is that CFs have a good effect on strengthening the fire resistance of a range of OPC–AAS blended pastes, such as CSHI and CSHII, CAH, CASHs, AFM, AFT, CFSH, and CH, receive additional support. Finally, a noticeable drop in CS levels was observed across the board for all the samples that were analyzed 51 . The comparative study between TGA and DrTGA is represented in Fig.…”

Section: Resultsmentioning

confidence: 90%

Cost-effective and green additives of pozzolanic material derived from the waste of alum sludge for successful replacement of portland cement

Mohamed

Farghali

Eessaa

et al. 2022

Sci Rep

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The major objective of this study was to examine the viability of using 5, 10, or 15 mass% of Activated Alum Sludge waste (AAS) instead of Ordinary Portland Cement (OPC) as a pozzolanic ingredient in concrete. This fundamental inquiry framed the investigation and OPC-AAS-hardened composites were studied to see whether they may benefit from inexpensive nanocomposites in terms of improved physical properties, mechanical strength, and resistance to heat and flame. The investigation set out to see how inexpensive nanocomposite might be put to use and the nanoparticles of CuFe2O4 spinel with an average size of less than 50 nm were successfully manufactured. Many different OPC-AAS-hardened composites benefit from the addition of CuFe2O4 spinel, which increases the composites' resistance to fire and enhances their physicomechanical properties at roughly average curing ages. Synthesized CuFe2O4 spinel was shown to have desirable characteristics by TGA/DTG and XRD. By using these methods, we were able to identify a broad variety of hydration yields, including C–S–Hs, C–A–S–Hs, C–F–S–Hs, and Cu–S–Hs, that enhance the physicomechanical properties and thermal resistivity of OPC-AAS-hardened composites as a whole. The composite material comprising 90% OPC, 10% AAS waste, and 2% CuFe2O4 has several positive economic and environmental outcomes.

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Section: Resultsmentioning

confidence: 90%

Cost-effective and green additives of pozzolanic material derived from the waste of alum sludge for successful replacement of portland cement

Mohamed

Farghali

Eessaa

et al. 2022

Sci Rep

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“…Multiple techniques were utilized to ascertain each set of cooled specimens' respective compressive strengths. To evaluate the textural characteristics and phases that were created throughout the hydration process, selected specimens were analyzed using X-ray diffraction (XRD), thermal gravimetric analysis (TGA/DTG), and scanning electron microscopy (SEM) 47 .…”

Section: Methodsmentioning

confidence: 99%

Cost-Effective and Green Additives of Pozzolanic Material Derived from The Waste of Alum Sludge for Successful Replacement of Portland Cement

Mohamed

Farghali

Eessaa

et al. 2022

Preprint

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The primary purpose of this investigation was to find out whether it would be feasible to successfully replace Ordinary Portland Cement (OPC) with 5, 10, or 15 mass % of activated alum sludge waste (AAS) as a pozzolanic material. This was the overarching question that guided the research that was conducted. A study into the use of low-cost nanocomposites to increase the physical, mechanical, and stability against the fire of OPC–AAS-hardened composites was carried out. The goal of this inquiry was to explore the utilization of low-cost nanocomposite. Producing CuFe2O4 spinel nanoparticles with an average particle size of less than 50 nm was doable. The introduction of CuFe2O4 spinel into a variety of OPC–AAS-hardened composites improve both the physicomechanical characteristics of the composites at nearly typical curing ages as well as the resistance of the composites to the effects of fire. Techniques such as TGA/DTG and XRD were utilized to provide evidence that synthesized CuFe2O4 spinel had favorable properties. These approaches revealed the presence of a range of hydration yields, such as CSHs, CASHs, CFSHs, and CuSHs, which improve the overall physicomechanical parameters as well as the thermal stability of a wide variety of OPC–AAS-hardened composites. The composite material that is composed of (90 % OPC, 10 % AAS waste, and 2 % CuFe2O4 offer several advantages, both financially and ecologically.

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“…Therefore, the reuse of GR in civil infrastructure applications is an interesting issue. Recently, several researchers [19][20][21][22][23][24] employed GR as a fine aggregate in an infrastructure construction. The replacement of GR in natural river sand of up to a maximum of 25% could produce geopolymer concretes that meet the required performance [21].…”

Section: Introductionmentioning

confidence: 99%

“…For road applications, GR can be used as a fine aggregate in asphalt concrete; the asphalt concrete with up to 25% GR replacement by weight of total aggregate had suitable Marshall properties comparable with conventional asphalt concrete using 100% granite aggregate [24]. Moreover, the GR replacement could improve California bearing ratio (CBR) of clayey sand for subgrade applications [23].…”

Section: Introductionmentioning

confidence: 99%

Improved Mechanical Properties of Cement-Stabilized Soft Clay Using Garnet Residues and Tire-Derived Aggregates for Subgrade Applications

Sukmak

Horpibulsuk

et al. 2021

Sustainability

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The growth of the global economy in recent years has resulted in an increase in infrastructure projects worldwide and consequently, this has led to an increase in the quantity of waste generated. Two recycled materials, namely garnet residues (GR) and tire-derived aggregates (TDA), were used to improve mechanical properties of soft clay (SC) subgrade in this study. GR was evaluated as a replacement material in SC prior to Type I Portland cement stabilization. TDA was also studied as an elastic material in cement-stabilized SC–GR. The laboratory tests on the cement–TDA-stabilized SC–GR included unconfined compressive strength (UCS), indirect tensile stress (ITS) and indirect tensile fatigue (ITF). Microstructural analysis on the cement–TDA-stabilized SC–GR was also performed to illustrate the role of GR and TDA contents on the degree of hydration. The UCS of cement-stabilized SC–GR increased when cement content increased from 0% to 2%. Beyond 2% cement content, the UCS development was slightly slower, possibly due to the presence of insufficient water for hydration. The GR reduces the specific surface and particle contacts of the SC–GR blends to be bonded with cementitious products. The optimum SC:GR providing the highest UCS was found to be 90:10 for all cement contents. Increased amounts of GR led to a reduction in UCS values due to its high water absorption, resulting in the insufficient water for the cement hydration. Moreover, the excessive GR replacement ratio weakened the interparticle bond strength due to its smooth and round particles. The TDA addition can enhance the fatigue resistance of the cement-stabilized SC–GR. The maximum fatigue life was found at 2% TDA content. The excessive TDA caused large amounts of micro-cracks in cement–TDA-stabilized SC–GR due to the low adhesion property of TDA. The SC:GR = 90:10, cement content = 2% and TDA content = 2% were suggested as the optimum ingredients. The outcome of this research will promote the usage of GR and TDA to develop a green high-fatigue-resistant subgrade material.

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Improvement of CBR value in soil subgrade using garnet waste

Cited by 6 publications

References 3 publications

Cost-effective and green additives of pozzolanic material derived from the waste of alum sludge for successful replacement of portland cement

Cost-effective and green additives of pozzolanic material derived from the waste of alum sludge for successful replacement of portland cement

Cost-Effective and Green Additives of Pozzolanic Material Derived from The Waste of Alum Sludge for Successful Replacement of Portland Cement

Improved Mechanical Properties of Cement-Stabilized Soft Clay Using Garnet Residues and Tire-Derived Aggregates for Subgrade Applications

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