scholarly journals Effect of Pozzolana and Lime on Expansive Soil Properties

2021 ◽  
Vol 9 (3) ◽  
pp. 94-101
Author(s):  
Omer S. M. Hamza ◽  
Magdi M. E. Zumrawi ◽  
Awad E. M. Mohamed
Keyword(s):  
Soil Properties ◽  
Expansive Soil ◽  
Swelling Pressure ◽  
Swelling Potential ◽  
Quick Lime ◽  
Disturbed Soil ◽  
Constant Content ◽  
Pressure Tests ◽  
Free Swell ◽  
Very High

This study investigates the effect of pozzolana and quick lime as stabilizer materials on expansive soil properties. Disturbed soil sample was collected from Al-Qadarif city in east of Sudan. The basic properties, swelling and strength of the soil were measured. The soil shows very weak strength and very high swelling potential. Mineralogical analysis tests were conducted to the soil using XRD tests. The soil contains significant amount of montmorillonite mineral (86%). Laboratory tests were undertaken on soil stabilized with varying percentage of pozzolana only (0, 5, 10, 15, 20, and 30%) and combination of pozzolana with constant content of quick lime (5%). Compaction, California Bearing Ratio (CBR), free swell, swell present and swelling pressure tests were performed on natural and treated soil. The pozzolana was obtained from Jebal Meidob and the lime obtained from local kilns in Kassala. The results showed that the treatment of expansive soil by combination of pozzolana and quick lime reduced soil swelling coupled with significant increase on soil strength. While the use of pozzolana only has marginal effective. It could be concluded that stabilization of expansive soil by pozzolana-lime admixture is successful.  

scholarly journals Research on Wetting-Drying Cycles’ Effect on the Physical and Mechanical Properties of Expansive Soil Improved by OTAC-KCl

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Bao-tian Wang ◽  
Can-hong Zhang ◽  
Xue-lian Qiu ◽  
En-yue Ji ◽  
Wen-hui Zhang
Keyword(s):  
Mechanical Properties ◽  
Expansive Soil ◽  
Physical And Mechanical Properties ◽  
Cyclic Strength ◽  
Soil Samples ◽  
Engineering Properties ◽  
Swelling Potential ◽  
Wetting And Drying ◽  
Strength Tests ◽  
Free Swell

Expansive soil experiences periodic swelling and shrinkage during the alternate wet and dry environments, which will result in severe damage to the slope stability. In this study, a promising modifier OTAC-KCl is introduced, which has a good diffusivity and is soluble in water or other solvents easily. Firstly, a reasonable combination of ameliorant 0.3% STAC and 3% KCl is chosen referring to the free swell test. Then, the best curing period, 14 days, is gotten from UCS tests. The effect of wetting and drying cycles on engineering properties of expansive soil improved by OTAC-KCl admixtures after 14-day curing is also studied accordingly. Both treated and untreated expansive soil samples are prepared for the cyclic wetting-drying tests which mainly include cyclic swelling potential and cyclic strength tests. Experimental results show that the swelling potential of expansive soil samples stabilized with OTAC-KCl is suppressed efficiently, and the untreated soil specimens will collapse when immersed in water while the treated specimens keep in good conditions. Moreover, expansive soil samples modified with 0.3% OTAC + 3% KCl show enough durability on the swelling ability, shear strength, and unconfined compressive strength, which means, that both the physical and the mechanical properties of stabilized expansive soil have been improved effectively.

scholarly journals Estimation of Free Swell and Swelling Pressure using Genetic Programming

2019 ◽  
Vol 8 (12) ◽  
pp. 4718-4720
Keyword(s):  
Genetic Programming ◽  
Regression Models ◽  
Expansive Soil ◽  
Swelling Pressure ◽  
Expansive Clay ◽  
Undisturbed Soil ◽  
Geotechnical Parameters ◽  
Theory Of Evolution ◽  
Free Swell ◽  
Problematic Soil

Regression models by genetic programming are useful in establishing relationships among various parameters using Darwin’s theory of evolution. Geotechnical parameters have been used in this model for the dataset obtained from literature. Genetic Programming is the automatic creation of computer programs to perform a selected task using Darwinian natural selection. The datasets for the expansive soil contain all the 3 expansive clay minerals – montmorillonite, illite and kaolinite. The origin for this problematic soil in Tabuk region, Saudi Arabia is due to the presence of Hanadir shale. Consolidometer was used in determining free swell for the undisturbed soil.

Model for the simulation of swelling-pressure measurements on expansive soils

1998 ◽  
Vol 35 (1) ◽  
pp. 96-114 ◽  
Author(s):  
Fangsheng Shuai ◽  
D G Fredlund
Keyword(s):  
Pore Water ◽  
Volume Change ◽  
Unsaturated Soil ◽  
Pore Water Pressure ◽  
Expansive Soils ◽  
Water Pressure ◽  
Expansive Soil ◽  
Swelling Pressure ◽  
Oedometer Test ◽  
Free Swell

Numerous laboratory swelling tests have been reported for the measurement of swelling pressure and the amount of swell of an expansive soil. These test methods generally involve the use of a conventional one-dimensional oedometer apparatus. Few attempts, however, have been made to formulate a theoretical framework to simulate the testing procedures or to visualize the different stress paths followed when using the various methods. The simulation of the oedometer tests on expansive soils is required to fully understand the prediction of heave. The correct measurement of swelling pressure is required for an accurate prediction of heave. It is further anticipated that some information on unsaturated soils property functions may be approximated from the back-analysis of the data. A theoretical model is proposed to describe the pore-water pressures with time and depth in a specimen as well as the volume changes during various oedometer swell tests. The model is formulated based on equilibrium considerations, constitutive equations for an unsaturated soil, and the continuity requirement for the pore fluid phases. The transient water flow process is coupled with the soil volume change process. The model can be used to describe the volume-change behaviour, pore-water pressure, and vertical total stress development in an unsaturated soil during an oedometer test performed by any one of several test procedures. The model has been put into a finite element formulation using the Galerkin technique. All the parameters required to run the model can be obtained by performing independent, common laboratory tests. The proposed model was used to simulate the results from free-swell, constant-volume, constant water content, and loaded-swell oedometer tests. Computed values of volume change, vertical total stress, and pore-water pressure are in good agreement with measured values.Key words: unsaturated soil, expansive soil, swelling pressure, theoretical simulation, constant-volume oedometer test, free-swell oedometer test, loaded-swell oedometer test.

scholarly journals Correlation between Swelling Pressure and Free Swell of Greater Cairo City Expansive Soils – A Case Study

2019 ◽  
pp. 1-6
Author(s):  
Nasser A. A. Radwan ◽  
Khaled M. M. Bahloul
Keyword(s):  
Expansive Soils ◽  
Expansive Soil ◽  
Swelling Pressure ◽  
Plasticity Index ◽  
Greater Cairo ◽  
Multiple Variable ◽  
Free Swell ◽  
Multiple Variable Regression ◽  
The Relationship

The aim of this research is to investigate experimentally the relationship between free swell, plasticity index of expansive soil found in greater Cairo City Suburbs, Egypt with swelling pressure of mentioned soil. Predicting Swelling Pressure of any soil is a time consuming and expensive test in comparison to determining plasticity index and free swell which are simple, fast and economic tests. In present research six samples of expansive soil were collected from different locations of study area. The method uses single variable and multiple variable regression analysis using Microsoft excel software.

scholarly journals Stabilisasi Tanah Lempung dengan Mengunakan Larutan Asam Sulfat (H2so4) pada Tanah Dasar di Daerah Godong - Purwodadi Km 50 Kabupaten Grogogan

2015 ◽  
Vol 21 (1) ◽  
pp. 13
Author(s):  
Sri Prabandiyani RW ◽  
Siti Hardiyati ◽  
Muhrozi Muhrozi ◽  
Bambang Pardoyo
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Swelling Pressure ◽  
Expansive Clay ◽  
Swelling Potential ◽  
Compaction Process ◽  
Soil Material ◽  
Additional Water ◽  
Low Levels ◽  
Very High

An expansive clay soil material that is composed of various minerals include kaolinite, montmorillonite and illite group. Mineral montmorilinite have the sensitivity to the effects of the water is very easy to expand and contract. High and low levels of development (swelling) and shrinkage (shrinkage) expansive clay is determined by the high and low content of montmorillonite on expansive clay granules. Because of these properties are very high content of montmorillonite often cause problems in the building. This study uses a solution of sulfuric acid (H2SO4) as a stabilizer through the compaction process Modified Proctor on OMC Proctor standard by the number of collisions each is 10 x, 25 x and 56 x, and the amount of additional water in cc on dry ground, with variations in increments of 100%, water by 90%:10% H2SO4, water by 80%: 20% H2SO4 and water by 90%: 30% H2SO4. This research was conducted testing-testing in the laboratory include: physical properties, mechanical properties. swelling pressure, swelling potential and CBR with curing and no curing. Results of the test-the test, can increase the value of physical and mechanical properties, while pergujian against swelling pressure and swelling potential is not significantly increased.

Improving Properties of Expansive Soil Using Cement, Quick Lime and Cement-Lime Blend

2019 ◽  
Vol 10 (2) ◽  
pp. 94 ◽  
Author(s):  
Abdulla A. Sharo ◽  
Yusuf A. Alhowaidi ◽  
Mohammad S. Al-Tawaha
Keyword(s):  
Expansive Soil ◽  
Quick Lime

An Overview: to Reduce Swelling Potential of Expansive Soil By Using Polypropylene Material

2018 ◽  
pp. 129-131
Author(s):  
A. A. Musale ◽  
M. A. Mhetre ◽  
A. I. Mukeri ◽  
K. S. Chavan ◽  
R. N. Kawade ◽  
...  
Keyword(s):  
Expansive Soil ◽  
Swelling Potential ◽  
Polypropylene Material

scholarly journals High-density bimodal bentonite blends for hydraulic sealings at the Ibbenbüren coalmine

Clay Minerals ◽  
2015 ◽  
Vol 50 (3) ◽  
pp. 391-403 ◽  
Author(s):  
Felicitas Wolters ◽  
Wiebke Baille ◽  
Katja Emmerich ◽  
Eva Schmidt ◽  
Christian Wolters ◽  
...  
Keyword(s):  
Swelling Pressure ◽  
Mining Area ◽  
Applied Strain ◽  
Sand Mixture ◽  
Pressure Tests ◽  
Pressure Development ◽  
Pressure Water ◽  
Sufficient Magnitude ◽  
Sealing Materials ◽  
Oedometer Tests

AbstractThe two high-pressure water-retaining dams at the Ibbenbüren coalmine in Münsterland (Germany) have to perform reliably under the induced tension caused by further exploitation of the current mining area. The load-bearing and the sealing functions of the new barriers were separated and new sealing materials were developed. An innovative multilayer sealing system of bentonite and sandwiched equipotential layers (SANDWICH) supporting homogeneous swelling and sealing, independent of formation water (Nüesch et al., 2002), was applied in this project. A testing program of strain-controlled swelling pressure tests on compacted bentonite specimens and on a bentonite/sand mixture was conducted to ensure an adequate potential for swelling-pressure development.The measurements under constant volume for dry densities between 1.45 g/cm3 and 1.67 g/cm3 showed an evolving swelling pressure between 1.04 and 1.8 MPa for 100% bentonite samples. Straincontrolled oedometer tests for zero strain and step-wise applied strain up to 2% revealed that a sufficient magnitude of swelling pressure existed at maximum applied strain.

scholarly journals KAJIAN PERBAIKAN SUBGRADE DARI TANAH EKSPANSIF MENGGUNAKAN SPENT CATALYST RCC 15 DAN ABU BATOK KELAPA SAWIT

2016 ◽  
Vol 18 (2) ◽  
Author(s):  
Totok Hermawan ◽  
Syahril Syahril
Keyword(s):  
Swelling Pressure ◽  
Plasticity Index ◽  
Swelling Potential ◽  
Spent Catalyst

Hasil pengujian pada lapisan Subgrade yang dilakukan di ruas jalan tol Cisumdawu khususnya pada STA 13+500 tergolong pada jenis tanah ekspansif. Kondisi Subgrade tersebut jika tidak segera diperbaiki maka dapat mengakibatkan berbagainya jenis kerusakan pada perkerasannya. Dalam penelitian perbaikan Subgrade yang dilakukan adalah menggunakan metode stabilisasi dengan Abu Batok Kelapa Sawit dan Spent Catalyst RCC 15. Penelitian ini bertujuan untuk mengevaluasi sejauh mana pengaruh penambahan Abu Batok Kelapa Sawit dan Spent Catalyst RCC 15 terhadap kembang susut dan daya dukung sebagai lapisan Subgrade konstruksi perkerasan ruas jalan tol Cisumdawu. Penelitian ini menghasilkan beberapa kesimpulan yaitu (1) Terjadi  penurunan nilai untuk kadar air optimum, Plasticity Index, Swelling Potential dan Swelling Pressure. (2) Terjadi Kenaikan nilai untuk Berat Isi Kering, CBR Unsoaked, CBR Soaked, CBR Peram, Permeabilitas, Ca-dd dan K-dd. (3) Tercapainya campuran bahan stabilisasi yang dapat digunakan sebagai perbaikan Subgrade pada tanah ekspansif untuk standar minimal Subgrade lapisan perkerasan jalan. (4) Belum tercapainya nilai yang optimum pada campuran bahan stabilisasi yang digunakan terhadap perubahan nilai karakteristik Subgrade. (5) Hasil pengujian secara statistik yang dilakukan didapatkan suatu hubungan yang yang berarti secara statistic.

scholarly journals The Improvement of Engineering Properties of Expansive Soil using Waste Glass Powder (WGP) and Quick Lime

2021 ◽  
Vol 9 (VI) ◽  
pp. 3598-3604
Author(s):  
Bhagwan Singh Lodha
Keyword(s):  
Glass Powder ◽  
Clayey Soil ◽  
Expansive Soil ◽  
Waste Glass ◽  
Engineering Properties ◽  
Binding Property ◽  
Unconfined Compression Test ◽  
Quick Lime ◽  
Waste Glass Powder ◽  
Consolidation Settlement

This study was carried out with an intention to observe any sign of improvement of expansive clayey soil due to the addition of Waste Glass Powder (WGP) with it. In this laboratory work clayey (BC) type soil has been chosen. The reason behind choosing clay is that it has many problems. The main problem is that it undergoes consolidation settlement due to the application of long-term loading. Another problem is it shrinks significantly if it is dried and expands significantly, if it absorbs moisture than exerts much pressure on the substructure. Quick Lime and Waste Glass powder is chosen to check the improvement because waste glass powder is cohesionless material and also contains silica, lime etc. Addition of cohesionless material to the cohesive soil means it will lesser the consolidation settlement and expansive nature of soil and Lime provides binding property. To investigate the traditional methods of analysing, the effect of additives on soil has been adopted i.e., conducting several tests of untreated soil and soil treated with waste glass and lime with varying percentage and then comparing the results obtained. The tests that were carried out in this study are Compaction test (Proctor test), Consolidation test (unconfined compression test). MDD and Unconfined compressive strength increases with the addition of glass powder and lime with oven dried expansive soil.

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