Engineering properties of loess in Algeria

Nouaouria, Mohamed Salah; Guenfoud, Mohamed; Lafifi, Brahim

doi:10.1016/j.enggeo.2008.01.013

Cited by 85 publications

(36 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…ߝ can be determined from the collapsible potential ( C P ) after over burden pressure adjustment at the 28 middle of the collapsible layer [34] as shown in the following equation:…”

mentioning

confidence: 99%

Enhancing mechanical behaviors of collapsible soil using two biopolymers

Ayeldeen

Negm

El-Sawwaf

et al. 2017

Journal of Rock Mechanics and Geotechnical Engineering

198

View full text Add to dashboard Cite

15This study aims to investigate the ability of using biopolymer (environmental friendly material) to enhance 16 the mechanical characterizations of collapsible soil. Two types of biopolymers were used in this study 17 (xanthan gum and guar gum) because of their stable behaviour under sever conditions and their availability 18 with reasonable prices. The experimental program focused on three major soil properties, which are; 19 compaction characterizations, collapsible potential and shear parameters, these three properties are 20 essential in any soil improvement process. Different biopolymer concentrations were used in this study and 21 the experimental program was performed at two curing periods (soon after mixing the soil with the 22 biopolymer and after one week curing time). shear parameters were measured for the treated specimens in 23 both soaked and unsoaked conditions, while a collapsible potential test was performed under different 24 mixing conditions (wet mix and dry mix). A numerical model was built to predict the behaviour of the 25 treated collapsible soil after and before inundation. The analysis of results indicated the ability of both 26 xanthan gum and guar gum to be used as soil improvement materials for collapsible soil treatment. The 27collapsible potential has been reduced significantly from 9% to 1% after mixing the soil with 2% 28 biopolymer concentration in the wet case. After one week curing period, the cohesion stress has been 29 increased from 8.5 to 105 kPa by increasing the xanthan gum concentration from zero to 2%, leading to 30 overall improvement in the soil shear strength. Also, it proved that the superiority of guar gum over 31 xanthan gum in improving the shear strength is about 30% more than xanthan gum at the same conditions 32 and reduces the collapsible potential by about 20% more than xanthan gum at the same conditions. 33 34 35

show abstract

“…ߝ can be determined from the collapsible potential ( C P ) after over burden pressure adjustment at the 28 middle of the collapsible layer [34] as shown in the following equation:…”

mentioning

confidence: 99%

Enhancing mechanical behaviors of collapsible soil using two biopolymers

Ayeldeen

Negm

El-Sawwaf

et al. 2017

Journal of Rock Mechanics and Geotechnical Engineering

198

View full text Add to dashboard Cite

show abstract

“…Collapsibility of loess can be predicted according to the principal component. Firstly, obtain the photo of loess under certain pressure based on SEM, then obtain the microstructure parameters applied image processing software and principle component used introduced method in this paper, at this point you can according to the equation (5)and equation (6) predict collapsibility coefficient corresponding to different moisture content. When moisture content is close to 3.0%, the line s1…”

Section: Relation Between Collapsibility and Microstructure Charactermentioning

confidence: 99%

“…In order to ensure the engineering safety and to reduce the cost, it is necessary to reasonably evaluate collapsibility of loess based on the characteristics of loess and engineering requirement. The mechanics and properties of these natural deposits have been systematically investigated [4][5][6][7][8]. A large number of studies have shown that there is a direct correlation between the collapsibility of loess and its microstructure.…”

Section: Introductionmentioning

confidence: 99%

A model to predict the collapsibility of Loess from micro-structural parameters

Gao¹,

Xiang-jun²,

Li³

2017

Proceedings of the 2017 6th International Conference on Energy and Environmental Protection (ICEEP 2017)

View full text Add to dashboard Cite

Abstract. The collapsibility has become a key material property to study strength and deformation behavior of loess, which is closely related with its micro structural character. In this paper, the authors firstly obtained simple micro-structural parameters both on loess samples of before and after collapsing from the Electron Scanning Microscope images, then made a comparative analysis of relationship among these simple parameters and constructed synthetic micro-structural parameters. Finally the authors presented equations for prediction the relationship between collapsibility coefficient and synthetic micro-structural parameters. It is shown that the collapsibility of loess can be evaluated objectively using the proposed method. The study provides efficient exploration in quantificational studying the effects of microstructure on collapsibility of loess.

show abstract

“…Studies claim that the loess covers about 17 % of the United States, about 17 % of Europe, 15 % of Russia and Siberia, and large areas of China [1]. A study by Nouaouria et al, showed that the properties of loess in southern Algeria are similar to those existing in other regions such as the soil of Iowa (USA) and Libya, this kind of soil can be classified as a silty loess [2].…”

Section: Introductionmentioning

confidence: 99%

Study of the Effect of Waste Glass Fibers Incorporation on the Collapsible Soil Stability Behavior

Bakir

Abbèche

Panczer

et al. 2020

KEG

View full text Add to dashboard Cite

Soil collapse remains a major issue affecting structural foundations, particularly in arid and semi-arid zones where humidification is a key factor contributing to the collapse. Much research has been devoted to identifying treatment methods which enhance the stability and load-bearing capacity of this type of soil. This paper investigates the potential advantages of the addition of milled glass fibers (Fg ). Soil samples were prepared at different compaction energies and various water contents, then treated with different percentages of milled glass fiber, before being submitted to the simple consolidation odometer test. The results obtained in this study showed that soil samples treated with an optimal dosage of 6% of milled glass fibers compacted at 60 blows and humidified at 6% of moisture content. This represents an improvement in the stability of the soil, reducing the collapse potential (Cp) from 11.95% to 1.62%. This treatment method produces soil which can be classified as a moderate risk foundation soil according to the Jennings and Knight evaluation metrics (1975). Keywords: collapsible soils, arid zones, fiberglass, odometer test.

show abstract

Engineering properties of loess in Algeria

Cited by 85 publications

References 11 publications

Enhancing mechanical behaviors of collapsible soil using two biopolymers

Enhancing mechanical behaviors of collapsible soil using two biopolymers

A model to predict the collapsibility of Loess from micro-structural parameters

Study of the Effect of Waste Glass Fibers Incorporation on the Collapsible Soil Stability Behavior

Contact Info

Product

Resources

About