Clayey soil stabilization using geopolymer and Portland cement

Ghadir, Pooria; Ranjbar, Navid

doi:10.1016/j.conbuildmat.2018.07.207

Cited by 287 publications

(88 citation statements)

References 51 publications

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“…In-depth investigation of the research depicts that soil stabilization was increased by the extension of various additives, i.e. marble powder [26,[33][34][35], cement [27], geopolymer [36], and Portland cement [37], lime and cement [38,39], Ordinary Portland cement and magnesium phosphate cement [37,38,40]. For soil strength growth, only less concentrate is given to MPC, so this study takes care of MPC as a novel additive mixture.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Marble Powder and Magnesium Phosphate Cement for Improving the Engineering Characteristics of Soil

Rai

Pei

Meng

et al. 2020

Int. J. of Geosynth. and Ground Eng.

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In this study, the effects of waste marble powder and magnesium phosphate cement on the properties of soil were investigated. The incorporation of waste marble powder (MP) and (MPC) magnesium phosphate cement as a novel additive, lead the significant environmental and economic contributions in soil stabilization. The key properties of natural soil were extracted and several tests, such as specific gravity, Atterberg limits, sieve analysis, unconfined compression strength test, Direct shear box test, modified Proctor test, California bearing ratio, and Scanning electron microscopy test were performed on soil samples prepared with different percentages of MPC and MP, i.e. 0%, 2.5%, 5%, 7.5% and 0%, 5%, 10%, 15%, respectively. An unconfined strength test was used to obtain desired comprehensive strengths following 7, 14, 28 days of curing time. The overall experimental results revealed that MP and MPC can be added to enhance the stability of the soil. While usability and effectiveness of MPC and MP are cost-effective and eco-friendly as the substitution of natural soil for deep foundations.

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Section: Introductionmentioning

confidence: 99%

Utilization of Marble Powder and Magnesium Phosphate Cement for Improving the Engineering Characteristics of Soil

Rai

Pei

Meng

et al. 2020

Int. J. of Geosynth. and Ground Eng.

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“…Chemical stabilisers include, but are not limited to, cements (Horpibulsuk et al 2010;Mohamed and El Gamal 2012), polymers (Arulrajah et al 2016;Latifi et al 2016;Ayeldeen et al 2017), fly ash (Arulrajah et al 2016), 2 This manuscript is submitted to Géotechnique inorganic salts (Abbeche et al 2010) and bituminous materials (Hoy et al 2016). The treatment often involves mixing soil with stabilisers (Ghadir and Ranjbar 2018), or grouting the soil with solutions containing reactive particles such as cement, resin or lime (Ibragimov 2005;Gallagher et al 2007). Due to the low permeability of loess deposits, the in site treatment methods using cements are limited to mainly mixing, soil piles, and compaction grouting.…”

Section: Introductionmentioning

confidence: 99%

Improving mechanical behaviour of collapsible soils by grouting active clay nanoparticles

Seiphoori¹,

Zamanian²

2020

Preprint

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The primary geotechnical concern of collapsible soils such as loess is their hydromechanical instability. During (re)wetting, metastable aggregates disintegrate leading soil to collapse under the applied load or self-weight. In situ chemical stabilisation, such as grouting, is a favoured option to improve the mechanical behaviour of soils; however, the low permeability of loess limits the application of permeation grouting in such deposits. Here a new approach is presented based on the injection of dilute suspensions of montmorillonite clay nanoparticles to improve mechanical behaviour of a low permeable loess. In addition to clay, the grouting behaviour of an ordinary cement material was also evaluated as a typically favoured soil stabiliser. Reconstituted specimens were also prepared by mixing dry clay or cement particles with soil at similar contents and curing time to allow a comparison with the grouting method. Results revealed that clay suspensions feature a high-mobility in the soil medium as well as a remarkable performance in reducing the collapse potential due to: (1) clay effective particle size (∼ 0.25 m) that facilitates its mobility in soil, and (2) formation of strong, capillary-driven solid bridges that reinforce the interparticle bonds during post grouting evaporation. These results encourage the application of clay nanoparticles over cements for a sustainable, economical and eco-friendly grouting approach to improve the mechanical behaviour of low permeable collapsible soils.

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“…From the stability investigations of a geopolymer grout (metakaolin/fly ash binary mixtures), fly ash affects the mechanical properties (at replacement rates of 40% and higher) due to the combined effects of higher packing density and reduced reactivity of the powders [29]. Dependent upon the type of mixture, curing time, and condition of the geopolymer in soil stabilization, it is reported [30] that increasing the binder-to-soil ratio enhances the compressive strength [31]. A higher alkaline activator concentration of the geopolymer reduces the workability and increases the strength [9].…”

Section: Introductionmentioning

confidence: 99%

Performances of Using Geopolymers Made with Various Stabilizers for Deep Mixing

2019

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This research aims to experimentally investigate the potential use of a geopolymer made from various stabilizers or byproducts (fly ash (FA-F, FA-C), slag (SL), glass powder (GP), metakaolin (MK), marble powder (MP), bottom ash (BA), rice husk ash (RHA), silica fume (SF)) to enhance the mechanical performance of soil (clay) via a deep mixing technique. Strengths of geopolymer soilcrete specimens were determined by unconfined compressive strength (UCS) tests regarding curing times (7 to 365 days) by comparing with Portland cement (PC). In addition, ultrasonic pulse velocity (UPV) tests, the effect of molarity (8–16 M), stress-strain behavior, failure modes, and microstructure (SEM, EDX) of geopolymer specimens were examined. Compared to PC, UCS responses of geopolymer specimens yielded: (i) a decreasing trend for FA-F, GP, MK, BA, and MP + FA-F, (ii) an increasing trend for FA-C, SL, and combinations of SL (BA + SL, RHA + SL, SF + SL, MK + SL) favorable with fewer proportions of stabilizers, and (iii) higher increments due to long-term curing (90, 365 days). Despite some decrements, most UCS values were found acceptable (>0.2 MPa) for sufficient enhancement of soft clay. The UCS results were mostly confirmed by UPV performances. The geopolymer specimens were also found to present: (i) strength development for alkaline concentrations from 10 to 14 M, (ii) brittle behavior of stress–strain curves that failed in axial splitting and near axial directions, and (iii) intensity of the silica peak for strength responsibility of the dense microstructure. The findings relatively support the usage of stabilizers or byproducts in the production of geopolymers for potential use in deep mixing. Thus, this research could be a basis for further efforts in this area.

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Clayey soil stabilization using geopolymer and Portland cement

Cited by 287 publications

References 51 publications

Utilization of Marble Powder and Magnesium Phosphate Cement for Improving the Engineering Characteristics of Soil

Utilization of Marble Powder and Magnesium Phosphate Cement for Improving the Engineering Characteristics of Soil

Improving mechanical behaviour of collapsible soils by grouting active clay nanoparticles

Performances of Using Geopolymers Made with Various Stabilizers for Deep Mixing

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