Lime Stabilization of Tropical Soils From Sudan For Road Construction

2013 ◽  
Author(s):  
Ahmed M. Elsharief
Keyword(s):  
Road Construction ◽  
Tropical Soils ◽  
Lime Stabilization

scholarly journals The Effects of Geocell Height and Lime Stabilization on Unpaved Road Settlements at Different Water Contents

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Erhan Burak Pancar ◽  
Aytuğ Kumandaş
Keyword(s):  
Large Scale ◽  
Road Construction ◽  
Soil Improvement ◽  
Loading Test ◽  
Lime Stabilization ◽  
Unpaved Road ◽  
Lime Content ◽  
Constant Height ◽  
Technical Specifications ◽  
Water Contents

In this study, lime stabilization and geocell reinforcement methods were investigated for a clayey subgrade of unpaved road at different water contents. This study is especially important in terms of determining the soil improvement method for road construction on wet lands. The effects of the geocell height (50, 100, 150, and 200 mm) and lime content (3, 6, and 12%) on the settlement of the subgrade soil at different water contents (25, 28, 30, 32, and 35%) were analyzed. Accordingly, a large scale plate loading test was designed, and it is utilized to achieve loading-settlement curves. The bearing capacity and modulus of subgrade (k) of soil were determined. It was detected that the geocell height and lime content have different effects at different water contents, and the modulus of subgrade reaction became stable beyond a constant height of the geocell. It was understood that none of these two improvements did not meet the Highways Technical Specifications. It is detected that at least these two improvement techniques are needed to be applied together to meet the specifications for the soil examined in this study.

Lime Stabilization of Black Cotton Soil Using Bagasse Ash as Admixture

2009 ◽  
Vol 62-64 ◽  
pp. 3-10 ◽  
Author(s):  
K.J. Osinubi ◽  
Thomas Stephen Ijimdiya ◽  
I. Nmadu
Keyword(s):  
Road Construction ◽  
Engineering Properties ◽  
Black Cotton Soil ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Lime Stabilization ◽  
Density Relationship ◽  
Compaction Energy ◽  
Base Course ◽  
The Cost

Laboratory studies to investigate the effect of Bagasse Ash (BA) admixture on the engineering properties of lime treated black cotton soil was carried out. Black cotton soil is classified as A-7-6 or CH respectively. Bagasse ash is obtained from burning the fibrous residue from the extraction of sugar juice from sugarcane. The results obtained show that the moisture density relationship follows a trend of increasing optimum moisture content (OMC)/decreasing maximum dry density (MDD) at the Standard Proctor compaction energy. California bearing ratio (CBR) values obtained are lower than the 80% CBR criterion for untreated base course materials. The peak CBR value obtained was 31% at 8 %lime/ 4%BA. This value meets the recommended criteria for subgrade materials. The Unconfined compressive strength (UCS) at 7 days is lower than the 1034.25kN/m2 evaluation criterion for adequate lime stabilization. On the basis of the soaked CBR and durability values, it is recommended that black cotton soil can be stabilized for road construction using a 8 % lime/ 4 % BA blend of admixture at standard proctor compaction. However, due to the relative high cost of lime and large quantity that shall be required to achieve stabilization, further study and consideration should therefore be given to the use another additive such as cement to augment and lower the percentage of lime and thus the cost of stabilization.

On Mechanisms of Realization of the Public Procurement of Construction Works (The Case of Road Const ruction)

2003 ◽  
pp. 68-80
Author(s):  
A. Dementiev ◽  
A. Zolotareva ◽  
A. Reus
Keyword(s):  
Public Procurement ◽  
Road Construction ◽  
International Experience ◽  
The Public ◽  
Government Purchases ◽  
Efficiency And Effectiveness ◽  
Construction Works ◽  
Budget Expenditure

The most important measures stimulating the increase of efficiency and effectiveness of budget expenditures on road construction are the improvement of pricing mechanisms and increasing efficiency of the procedures of government purchases of goods, works and services. The paper includes the analysis of main problems that arise in the process of government purchases and construction pricing with the reference to budget expenditure on road construction. It includes the review and analysis of international experience and possible measures of increasing the efficiency and effectiveness of government purchases and (road) construction pricing in Russia.

The Political Economy of Power: Approaches to the Analysis of Relationships between the State and Business in Russia

2011 ◽  
pp. 19-33
Author(s):  
A. Oleinik
Keyword(s):  
Oil And Gas ◽  
Road Construction ◽  
Oil And Gas Industry ◽  
Retail Trade ◽  
Business Community ◽  
The Political ◽  
Economic Power ◽  
Gas Industry ◽  
The Road ◽  
Ruling Elites

The article deals with the issues of political and economic power as well as their constellation on the market. The theory of public choice and the theory of public contract are confronted with an approach centered on the power triad. If structured in the power triad, interactions among states representatives, businesses with structural advantages and businesses without structural advantages allow capturing administrative rents. The political power of the ruling elites coexists with economic power of certain members of the business community. The situation in the oil and gas industry, the retail trade and the road construction and operation industry in Russia illustrates key moments in the proposed analysis.

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