Long-Term Stability Characteristics of a Lime-Treated Plastic Soil

Khattab, Suhail I. A.; Al-Mukhtar, Muzahim; Fleureau, Jean‐Marie

doi:10.1061/(asce)0899-1561(2007)19:4(358)

Cited by 156 publications

(52 citation statements)

References 8 publications

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“…Several studies were performed to understand the effect of seasonal moisture fluctuations and their relative volumetric changes on long-term performance of chemically stabilized expansive clays (Dif and Bluemel 1991;Lin and Benson 2000;Rao et al 2001;Guney et al 2007;Khattab et al 2007;Cui et al 2011;. A brief overview of some of these studies is presented in the following sections followed by shortcomings of these studies.…”

Section: Documented Durability Studiesmentioning

confidence: 99%

Addressing Clay Mineralogy Effects on Performance of Chemically Stabilized Expansive Soils Subjected to Seasonal Wetting and Drying

Chittoori

Puppala

Pedarla

2018

J. Geotech. Geoenviron. Eng.

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This is an author-produced, peer-reviewed version of this article. The final, definitive version of this document can be found online at Journal of Geotechnical and Geoenvironmental Engineering, published AbstractPremature failures in chemically stabilized expansive soils cause millions of dollars in maintenance and repair costs. One of the reasons for these failures is the inability of existing stabilization design guidelines to consider the complex interactions between clay minerals and the stabilizers. It is vital to understand these complex interactions, as they are responsible for the strength improvement and swell/shrink reduction in these soils, in turn affecting the overall health of the infrastructure. Hence, this research study examined the longevity of chemically stabilized expansive soils subjected to wetting/drying conditions with a major focus on clay mineralogy. Eight different natural soils with varying clay mineralogy were subjected to wetting/drying durability studies after stabilizing with chemical additives including quicklime and cement. Performance indicators such as volumetric strain and Unconfined compressive strength trends were monitored at regular intervals during the wetting/drying process. It was observed that clayey soils dominant in the mineral Montmorillonite were susceptible to premature failures. It was also noted that soils dominant in other clay minerals exhibited early failures at lower additive contents. Also, an attempt was made for the first time to address the field implications of the laboratory studies by developing a correlation that predicts service life in the field based on clay mineralogy and stabilizer dosage.

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Section: Documented Durability Studiesmentioning

confidence: 99%

Addressing Clay Mineralogy Effects on Performance of Chemically Stabilized Expansive Soils Subjected to Seasonal Wetting and Drying

Chittoori

Puppala

Pedarla

2018

J. Geotech. Geoenviron. Eng.

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“…The optimum moisture content decreases, and the maximum dry unit weight increases with an increase in lime content in expansive soil (Neeraja, 2010). Researchers such as Bell (1996); Rajasekaran and Rao (2000); Consoli et al (2011); Rogers et al (2006);and Khattab et al (2007) reported that lime stabilization not only stabilizes expansive soil but also induces cementation due to pozzolanic reactions that lead to increases in strength and long-term performance, whereas researchers such as Hilt and Davidson (1960); Herrin and Mitchell (1961); Bell (1996) and Kumar et al (2007) have reported that increases in lime content beyond a certain threshold leads to a decrease in strength. Ameta et al, (2007) conducted a study on bentonite mixed with lime and gypsum and reported that the addition of 2 % lime + 4 % gypsum is adequate for reducing the plasticity and swelling of bentonite.…”

mentioning

confidence: 99%

Engineering Properties of Bentonite Stabilized with Lime and Phosphogypsum

Kumar

Dutta

Mohanty

2014

Slovak Journal of Civil Engineering

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Engineering properties such as compaction, unconfined compressive strength, consistency limits, percentage swell, free swell index, the California bearing ratio and the consolidation of bentonite stabilized with lime and phosphogypsum are presented in this paper. The content of the lime and phosphogypsum varied from 0 to 10 %. The results reveal that the dry unit weight and optimum moisture content of bentonite + 8 % lime increased with the addition of 8 % phosphogypsum. The percentage of swell increased and the free swell index decreased with the addition of 8 % phosphogypsum to the bentonite + 8 % lime mix. The unconfined compressive strength of the bentonite + 8 % lime increased with the addition of 8 % phosphogypsum as well as an increase in the curing period up to 14 days. The liquid limit and plastic limit of the bentonite + 8 % lime increased, whereas the plasticity index remained constant with the addition of 8 % phosphogypsum. The California bearing ratio, modulus of subgrade reaction, and secant modulus increased for the bentonite stabilized with lime and phosphogypsum. The coefficient of the consolidation of the bentonite increased with the addition of 8 % lime and no change with the addition of 8 % phosphogypsum.

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“…Procurement of equipment considerably increases the cost of construction for the project at hand and hence may render the method inappropriate. In addition, the long-term performance of lime-stabilized active soils is not yet well understood (Puppala et al, 2006;Khattab et al, 2007). Mechanical methods on the other hand, include mixing with inert soils (Farooq and Munir, 2006), overloading, and pre-wetting or pre-swelling (Stavridakis, 2006;Reed, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…2. Particle size distribution of the tested mateiral Miller, 1992; Phanikumar and Sharma, 2006;Khattab et al, 2007). However, heavy machinery (equipment) is required to spread and mix lime with soil.…”

Section: Introductionmentioning

confidence: 99%