scholarly journals The Effects of Pine Tree Sawdust on the Volume Compressibility of Expansive Soils

2021 ◽  
Vol 10 (04) ◽  
pp. 029-033
Author(s):  
Ekrem Kalkan ◽  
Necmi Yarba
Keyword(s):  
Expansive Soils ◽  
Experimental Studies ◽  
Expansive Soil ◽  
Soil Improvement ◽  
Geotechnical Properties ◽  
Saw Dust ◽  
Volume Compressibility ◽  
Pine Tree ◽  
Earth Structures ◽  
Materials Used

Expansive soils are very important natural geological materials used in the geotechnical applications in the worldwide. After compacting, they are used as hydraulic barriers in earth structures, such as core of earth fill dams, landfill liners, and etc. However, these soils have some defects from technical points of view. To remove the defects, one of the soil improvement methods is mixing of these soils with granular materials. In this study, pine tree sawdust was used as granular additive material to stabilize the expansive soils. The effects of pine saw dust on the volume compressibility of expansive soils were investigated by using experimental studies under laboratory conditions. The test results showed that the pine saw dust positively affected the geotechnical properties in term of volume compressibility manner. As a consequently, the geotechnical properties of the expansive soil when blended with pine tree sawdust indicates that the pine tree sawdust is a good modification material for this problematic soil.

scholarly journals Experimental investigation of soil blended with lime and lignosulphonate

2018 ◽  
Vol 7 (2.25) ◽  
pp. 74
Author(s):  
Soundarya M.K ◽  
Bhuvaneshwari S ◽  
Prasanna Kumar.S
Keyword(s):  
Expansive Soils ◽  
Research Work ◽  
Expansive Soil ◽  
Pozzolanic Reaction ◽  
Clay Particles ◽  
Bearing Strength ◽  
Pulp Industry ◽  
Saw Dust ◽  
Change Behavior ◽  
Volume Change Behavior

The deterioration of the structures which are built on the expansive soils is due to its volume change behavior, due to the presence of Mont-morillonite minerals in soil. Hence this soil requires adequate stabilization before commencement of any construction activities. The stabili-zation phenomenon in which addition suitable additives completely alters the behavior of the soil by changing the basic properties and there-by increasing the bearing strength of soil. The choice of the additives depends on the ease and permanence of the stabilizing characteristics achieved for the expansive soil. In this paper, an attempt is done to evaluate the behavior of soil when blended with additives like saw dust ash, lime and lignosulphonate at varying blending ratio. The objective of the research work is to focus on the change in the plasticity charac-teristics by utilizing the industrial waste as additive due to its cementitious value, making it eco-friendly and reduction in cost. Lignosulpho-nate is a by-product of paper pulp industry, generated during the sulphite process. From the literature, the optimum percentage for stabilizing works for lime and lignosulphonate was found to be two to eight percent and one to three percent respectively. Basic Index properties and compaction characteristics test were determined for both virgin and treated soil. The additives decreased the plasticity index, causing ag-glomeration of clay particles involving pozzolanic reaction. 

scholarly journals A Review on Expansive Soils Stabilized with Different Pozzolanic Materials

2022 ◽  
Vol 28 (1) ◽  
pp. 1-18
Author(s):  
Ahmed Al-Kalili ◽  
Ahmed S. Ali ◽  
Abbas J. Al-Taie
Keyword(s):  
Expansive Soils ◽  
Expansive Soil ◽  
High Volume ◽  
Engineering Properties ◽  
Collapsible Soil ◽  
Calcined Clay ◽  
Wide Range ◽  
Pozzolanic Materials ◽  
Materials Used ◽  
Furnace Slag

Soils that cause effective damages to engineer structures (such as pavement and foundation) are called problematic or difficult soils (include collapsible soil, expansive soil, etc.). These damages occur due to poor or unfavorited engineering properties, such as low shear strength, high compressibility, high volume changes, etc. In the case of expansive soil, the problem of the shrink-swell phenomenon, when the soil reacts with water, is more pronounced. To overcome such problems, soils can be treated or stabilized with many stabilization ways (mechanical, chemical, etc.). Such ways can amend the unfavorited soil properties. In this review, the pozzolanic materials have been selected to be presented and discussed as chemical stabilizers. The selected pozzolanic materials are traditional, industrial, or byproducts, ashes of agricultural wastes, and calcined-clay types. They are lime, cement, blast furnace slag, fly ash, silica fume, rice husk ash, sugarcane straw ash, egg ash, coconut husk ash, and metakaolin. In general, the stabilization of expansive soils with pozzolanic materials has an essential impact on swelling and Atterberg-limits and positively affects compaction and strength parameters. However, there is a wide range for the percentages of pozzolanic materials used as stabilizers. The content (15% to 20%) is the most ratios of the stabilizers used as an optimal percentage, and beyond this ratio, the addition of the pozzolanic materials produces an undesirable effect.

scholarly journals Evaluating the Uses of Concrete Demolishing Waste in improving the Geotechnical Properties of Expansive Soil

2020 ◽  
Vol 26 (7) ◽  
pp. 158-174
Author(s):  
Safin B. Saeed ◽  
Kamal Ahmad Rashed
Keyword(s):  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Soil Stabilization ◽  
Expansive Soil ◽  
Soil Improvement ◽  
Geotechnical Properties ◽  
Natural Soil ◽  
Swelling Potential ◽  
Engineering Applications ◽  
Chemical Admixture

Expansive soil is one of the most serious problems that face engineers during the execution of any infrastructure projects. Soil stabilization using chemical admixture is one of the most traditional and widespread methods of soil improvement. Nevertheless, soil improvement on site is one of the most economical solutions for many engineering applications. Using construction and demolishing waste in soil stabilization is still under research., The aim of this study is to identify the effect of using concrete demolishing waste (CDW) in soil stabilization. Serious tests were conducted to investigate the changes in the geotechnical properties of the natural soil stabilized with CDW. From the results, it is concluded that the swelling potential of the expansive soil reduced and dramatic increases in unconfined compressive strength (UCS) value up to 3 times of its original value was reported. The results indicate that CDW is an economical solution to be used in soil stabilization whereas it is a sustainable idea to recycle constructional wastes and solve the continued need for the more landfilling area.

scholarly journals Effect of Polymeric Resins on Geotechnical Properties of Black Cotton Soil

2020 ◽  
Vol 8 (5) ◽  
pp. 1781-1785
Keyword(s):  
Expansive Soils ◽  
Expansive Soil ◽  
Geotechnical Properties ◽  
Black Cotton Soil ◽  
Soil Conditions ◽  
Chemical Stabilization ◽  
Stabilization Method ◽  
Mechanical Stabilization ◽  
Polymeric Resins ◽  
Moisture Barriers

Stabilization of black cotton soil is a challenging task for geotechnical engineers since such soil is highly vulnerable to expansive characteristics when the moisture content is increased. Due to its expansive nature, it is also called as swelling or expansive soils. Among the clay minerals, Montmorillonite is mainly responsible for such expansive characteristics. Bore log profile has a cluster of soil specimens including black cotton soil also which is unavoidable. Soil engineers have a serious concern about such expansive soil since it is treacherous for foundation of buildings. To overcome such deficiencies it becomes essential to stabilize the soil conditions. The commonly employed methods to decrease the expansive behaviour are: Chemical stabilization, Mechanical stabilization and installation of moisture barriers. In this paper, chemical stabilization method is adopted. Soil stabilizers, namely, sodium silicate, epoxy resin and polyvinyl alcohol are chosen and are mixed with black cotton soil in varying proportions of 5%, 10% and 15% to study the changes in geotechnical properties. From the results it is evident that polymer treated soils reduce plasticity characteristics and shows better results in geotechnical properties.

scholarly journals Improvement of the Geotechnical Properties of Expansive Soils Using Fly Ash

2021 ◽  
Vol 56 (1) ◽  
Author(s):  
Nahla M. Salim
Keyword(s):  
Fly Ash ◽  
Specific Gravity ◽  
Expansive Soils ◽  
Expansive Soil ◽  
Swelling Pressure ◽  
Geotechnical Properties ◽  
Plasticity Index ◽  
Dry Density ◽  
The Impact ◽  
Swell Pressure

This test program studies the impact of using fly ash on prepared soil by adding different percentages of fly ash (5%, 10% and 15%) by dry soil weight. The expansive soil was prepared in the laboratory by mixing natural soil (Al-Nahrawan clayey soil) with different percentages of bentonite (30%, 50% and 70%). The experimental study focuses on the effects of the fly ash content on the free swell index, swell potential, swelling pressure, plasticity and compaction characteristics of expansive soil. The influence of these admixtures was compared with those of untreated soils. The results show that the plasticity index, the optimum moisture content, swelling percent and swell pressure increase with an increase in the bentonite percentage, and the maximum dry density and specific gravity decrease with increases in the bentonite percentage. The plasticity index, specific gravity, swelling and swelling pressure decrease with increases in the fly ash percentage. The optimum percentage of fly ash was 5%, where the swell and swell pressure decreased by a large amount. The results showed that the addition of fly ash to expansive soils has a positive effect on the soil's geotechnical properties.

scholarly journals Utilization of Lime Sludge Activated by Salt in Egyptian Expansive Soil Improvement

2021 ◽  
Vol 9 (2) ◽  
Author(s):  
Carmen M. Sharaby ◽  
Mohie Eldin M. El mashad ◽  
Mona A. Fakhry ◽  
Marwa H. Salama
Keyword(s):  
Expansive Soils ◽  
Expansive Soil ◽  
Soil Improvement ◽  
Liquid Limit ◽  
Engineering Properties ◽  
Chloride Salt ◽  
Industrial Solid Waste ◽  
Positive Effects ◽  
Lime Sludge ◽  
The Impact

Expansive soils are active clays which cause engineering problems all over the world. This research deals with the impact of lime sludge (LS) as industrial solid waste from sugar-cane factory and sodium chloride salt (NaCl) on engineering properties of expansive soil. In this research, an analytical study of chemical and physical properties of Egyptian expansive soil in Sixth of October City was made as a case study. The laboratory results showed improvement of chemical, microstructural properties and thus the engineering properties of this soil. The results of chemical analysis showed the ability of soil to improve pH; soil alkalinity raise to the required level of stabilization. After soil treatment, Microstructure scanning electron with energy dispersive spectroscopy (SEM-EDX) analyses showed that new cementitious compounds are formed and soil was changed from a weak dispersed structure to strong flocculated structure. It was also observed by increasing LS and NaCl concentrations the plastic limit increased and the liquid limit decreased, hence decreased plasticity index; the rate of soil free swelling is decreased due to change of expansive soil texture. Therefore, lime sludge activated by NaCl has positive effects on engineering properties of soil. By this way we protect the environment from industrial solid wastes.  

Effect of Adding Zeolitic Tuff on Geotechnical Properties of Lime-Stabilized Expansive Soil

2021 ◽  
Author(s):  
Samer R. Rabab’ah ◽  
Madhar M. Taamneh ◽  
Hussein M. Abdallah ◽  
Osama K. Nusier ◽  
Laith Ibdah
Keyword(s):  
Expansive Soil ◽  
Geotechnical Properties ◽  
Zeolitic Tuff
Sign in / Sign up

Export Citation Format

Share Document