The Mechanical Properties of Fly-Ash-Stabilized Sands

Simatupang, Minson; Mangalla, Lukas Kano; Edwin, Romy Suryaningrat; Putra, Adris Ade; Azikin, Muhammad Thahir; Aswad, N. H.; Mustika, Wayan

doi:10.3390/geosciences10040132

Cited by 38 publications

(26 citation statements)

References 46 publications

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“…The Si and Al minerals found in industrial by-products such as fly ash from coal combustion and GGBFS from iron combustion are employed in geopolymer processes for soil stabilization [ 57 , 58 , 59 , 60 ]. In order to produce geopolymer, the sources of alumina and silica (fly ash and GGBFS) act as precursors that are easily dissolved in alkaline solutions resulted from alkaline activation, making geopolymerization possible [ 47 , 49 , 57 , 58 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 ].…”

Section: Introductionmentioning

confidence: 99%

Potential of Soil Stabilization Using Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash via Geopolymerization Method: A Review

et al. 2022

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Geopolymers, or also known as alkali-activated binders, have recently emerged as a viable alternative to conventional binders (cement) for soil stabilization. Geopolymers employ alkaline activation of industrial waste to create cementitious products inside treated soils, increasing the clayey soils’ mechanical and physical qualities. This paper aims to review the utilization of fly ash and ground granulated blast furnace slag (GGBFS)-based geopolymers for soil stabilization by enhancing strength. Previous research only used one type of precursor: fly ash or GGBFS, but the strength value obtained did not meet the ASTM D 4609 (<0.8 Mpa) standard required for soil-stabilizing criteria of road construction applications. This current research focused on the combination of two types of precursors, which are fly ash and GGBFS. The findings of an unconfined compressive strength (UCS) test on stabilized soil samples were discussed. Finally, the paper concludes that GGBFS and fly-ash-based geo-polymers for soil stabilization techniques can be successfully used as a binder for soil stabilization. However, additional research is required to meet the requirement of ASTM D 4609 standard in road construction applications, particularly in subgrade layers.

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Section: Introductionmentioning

confidence: 99%

Potential of Soil Stabilization Using Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash via Geopolymerization Method: A Review

et al. 2022

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“…Adhikari et al [55] concluded that geopolymer reaction was a progressive and continuous process, that generally continues for extended period of time, while being responsible for continued strength gain of the stabilized soil. Simatupang et al [56] specifically stated that the strength gain was delayed at the beginning of the curing period (particularly at a curing time of less than 28 days) and that more time was required for the pozzolanic reaction to form cementitious compounds in the FA stabilized soil. Teing et al [49] mentioned that the delayed pozzolanic activity was due to the low reactivity of the silica and alumina present within the FA, which caused FA treated specimens for short curing periods to have low to moderate strength gain.…”

Section: Unconsolidated Undrained (Uu) Triaxial Compression Testmentioning

confidence: 99%

Strength Enhancement of Geotextile-Reinforced Fly-Ash-Based Geopolymer Stabilized Residual Soil

Jayawardane

Anggraini

Li-Shen

et al. 2020

Int. J. of Geosynth. and Ground Eng.

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Soils in their natural form are often deemed unsatisfactory to be directly used as a construction material for their respective applications. Under such circumtances, employment of ground improvement techniques to better suit the soil for its function is typically the most economical approach. Consequently, the present research investigated into the beneficial effect of modernized soil treatment techniques, i.e., geopolymer stabilization using fly ash as the precursor and geotextile reinforcement, on the strength enhancement of natural residual soil. A series of unconsolidated undrained (UU) triaxial compression tests were carried out to assess variation of geopolymer stabilized residual soil strength based on the varying number of geotextile layers, geotextile arrangement, and confining pressures. It was found that the increase in the number of geotextile layers resulted in a corresponding rise in soil strength and stiffness. It was also discovered that placement of geotextile layers at sample regions which suffered the maximum tensile stress-strain during loading was more effective compared to random placement. Soil strength was observed to reduce with increasing confining pressure which demonstrated the effectiveness of utilizing geotextile reinforcement at greater depths below the ground to be less. Failure patterns showed that while unreinforced soil resulted in failure along a shear plane at an approximate angle of 45 + φ/2 (φ: angle of internal friction), reinforced samples demonstrated a bulging failure where the soil between adjacent layers of geotextiles appeared to bulge. The findings deemed the employment of geopolymer stabilization and geotextile reinforcement on natural residual soil very effective with regards to the enhancement of soil strength and stiffness.

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“…Dewasa ini, fly ash telah dimanfaatkan dalam berbagai bidang konstruksi bangunan sipil, seperti dalam stabilisasi tanah [8], [9], [11], [12]. Stabilisasi tanah dengan fly ash telah diterapkan sebagai alternatif yang efektif untuk peningkatan kekuatan dan kekakuan tanah melalui reaksi kimia [13], [14].…”

Section: Pendahuluanunclassified

Sifat-Sifat Mekanik Material Komposit Berbahan Dasar Fly Ash Dan Pasir Halus

Muhaimin¹,

Simatupang

2020

DJITM

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Soil stabilization using fly ash is an attractive alternative to be developed. Besides reducing industrial waste, it is also economical in terms of costs. With the presence of water, the lime contained in fly ash would be decomposed and undergone a cementation process and a pozolan reaction which would bind the sand grains. In this study, the effect of fly ash content and curing period on the amount of compressive strength and shear strength was observed using an unconfined compressive and direct shear test, respectively. The stress-strain relationships due to shear loads between sand without fly ash and sand with fly ash were compared to see an increase in shear strength due to the addition of fly ash. The results show that the unconfined compressive strength and shear strength of the composite material increase with the addition of fly ash and curing period. But the opposite happened in compressive strain. It was confirmed that the strain to achieve maximum compressive strength decreased with increasing fly ash content and curing period. The fly ash bond was getting brittle with the increasing compressive strength of the composite material made from fly ash and fine sand.

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The Mechanical Properties of Fly-Ash-Stabilized Sands

Cited by 38 publications

References 46 publications

Potential of Soil Stabilization Using Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash via Geopolymerization Method: A Review

Potential of Soil Stabilization Using Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash via Geopolymerization Method: A Review

Strength Enhancement of Geotextile-Reinforced Fly-Ash-Based Geopolymer Stabilized Residual Soil

Sifat-Sifat Mekanik Material Komposit Berbahan Dasar Fly Ash Dan Pasir Halus

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