Mechanical Properties of Alkali Activated Fly Ash Geopolymer Stabilized Expansive Clay

Murmu, Anant Lal; Jain, Anamika; Patel, Anjan

doi:10.1007/s12205-019-2251-z

Cited by 85 publications

(16 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different proportions of BCS, yellow soil, and moorum were taken and mixed with fly ash to determine the standard proctor test result, specific gravity, and particle size distribution. To stabilize BCS economically, only 10 to 15 % of class F fly ash was required [22,23]. The different samples were tested to determine index properties.…”

Section: Methodsmentioning

confidence: 99%

Determination of Geotechnical Properties and Stability of Expansive Soil using Fly Ash

Khan

Das

Dewangan

2021

Walailak J Sci & Tech

View full text Add to dashboard Cite

This study was conducted to have a detailed analysis of the geotechnical properties of expansive soil and fly ash from Sipat thermal power plant. It reported the findings of laboratory studies on certain common physical and geotechnical properties. The chemical properties and morphology of the black cotton soil (BCS) and fly ash is also determined using scanning electron microscopy and X-ray diffraction test. The geotechnical test includes determining specific gravity, particle size distribution, moisture content, standard proctor test, free swell index, and Atterberg’s limit. The different compositions of expansive soil with fly ash, yellow soil, moorum, and sand are studied. BCS was evaluated with fly ash, fly ash and sand, BCS with yellow soil, and moorum and fly ash. The study also analyzed the details and results of different tests conducted on soil samples. The results showed that strength and fly ash are inversely proportional; as fly ash increases, strength decreases, and vice versa. Fly ash was added from 20 to 80 % by replacing expansive soil by weight. The results indicated that expansive soil can be stabilized by the addition of fly ash to a limit of 10 to 20 %. HIGHLIGHTS The XRD And SEM results shows the mineral present in the FlyAsh and Expansive soil The geotechnical properties of Flyash and expansive soil is determined The OMC increases with decrease in densities The Particle size distribution curve shows the soil is GW soil GRAPHICAL ABSTRACT

show abstract

Section: Methodsmentioning

confidence: 99%

Determination of Geotechnical Properties and Stability of Expansive Soil using Fly Ash

Khan

Das

Dewangan

2021

Walailak J Sci & Tech

View full text Add to dashboard Cite

show abstract

“…It is to mention here that as per the codes of Indian road congress (IRC 37, 2012), a stabilized sub-base material must achieve aminimum strength of 750 kPa at the end of 28 days curing period. The development in strength after geopolymerization is attributed to the formation of cementitious materials Sustainability, Agri, Food and Environmental Research, (ISSN: 0719-3726), 10(X), 2022: http://dx.doi.org/ 10 and transformation of soil particles into a more densely packed form (Murmu A. L., Jain, A., & Patel, A, 2019).…”

Section: Strength Characteristics Of Activated Flyash and Ggbsmentioning

confidence: 99%

A review on effect of soil stabilization using alkali activated geopolymer.

Karthikeyan¹,

George²

2023

Sust. Agric. Food Env. Res.

View full text Add to dashboard Cite

In order to confront the issues related to clay for construction, some adequate ground improvement technique is important. To enhance the properties of clay, alkaline solutions such as sodium hydroxide and sodium silicate are used along with Class F fly ash, Ground Granulated Blast Furnace Slag (GGBS) and metakaolin as additives. Flyash greatly modifies the strength properties of soft soils and it contain silica and aluminium materials (pozzolans) also as a particular amount of lime, which chemically binds to soft soil and forms cement compounds. Metakaolin is a highly reactive pozzolana formed by the calcinations of kaolinite (China clay).In many civil engineering constructions, soft and weak soils are often stabilized with Ordinary Portland cement (OPC) and lime. The production processes of traditional stabilizers are energy intensive and emit an outsized quantity of CO2. Geopolymer offer a better alternative to OPC, with its high strength, low cost, low energy consumption and CO2 emissions during synthesis. Due to the major environmental impacts involved in the manufacturing of OPC, the use of industrial by-products has been encouraged. The reason for the increase in compressive strength due to GGBS can be caused by the high GGBS calcium content. These polymers are economic and, compared to many chemical alternatives, are more effective and significantly less damaging to the environment. The combined impact of fly ash, GGBS and metakaolin will boost the soil's engineering efficiency.The alkali activation of waste materials has become an important area of research in many laboratories because it is possible to use these materials to synthesize inexpensive and ecologically sound cement like construction materials.The activator solution is also very influential in the polymerization process and it's also one of the factors that determine the compressive strength. Keywords—Alkali activation, Geopolymer, fly ash, GGBS, clay, stabilization

show abstract

“…Several authors in the past have proved that the strength of FA geopolymer stabilized soil increases with curing period. For instance, according to Murmu et al [54], the FA over time, reacts with the alkaline solution producing cementitious materials that bond/bridge between the soil particles and transforms the soil matrix into a more densely packed form. 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.…”

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.

View full text Add to dashboard Cite

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.

show abstract

Mechanical Properties of Alkali Activated Fly Ash Geopolymer Stabilized Expansive Clay

Cited by 85 publications

References 37 publications

Determination of Geotechnical Properties and Stability of Expansive Soil using Fly Ash

Determination of Geotechnical Properties and Stability of Expansive Soil using Fly Ash

A review on effect of soil stabilization using alkali activated geopolymer.

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

Contact Info

Product

Resources

About