GPR experimental evaluation of subgrade soil characteristics for rehabilitation of roads

Author(s):  
A. Benedetto ◽  
F. Benedetto
2019 ◽  
Vol 969 ◽  
pp. 225-230
Author(s):  
Ayush Mittal ◽  
Shalinee Shukla

The performance of flexible pavement depends mainly on the subgrade soil characteristics as it serves as a foundation for pavement. Roads constructed over poor subgrade soil fails frequently leading to heavy economic burden apart from high initial cost of construction. In order to overcome these problems soil reinforcement technique has to be adopted. The use of geosynthetic material is a new and emerging technique and is gaining importance due to cost and time saving apart from less environmental sensitive nature. In the present study an attempt has been made to make use of non-woven geotextile and biaxial geogrid in various combinations. The geogrid was placed above geotextile, both in layers from the top of mold and heavy compaction, soaked CBR and unconfined compressive strength (UCS) tests were performed. Scanning electron microscopy (SEM) images indicate significant bonding between soil particles and geogrid surface.


Author(s):  
N. Manikyala Rao ◽  
B.P.R.V.S Priyatham

India is a geographically diverse country with varied soil types in different places. As a result, stabilising techniques are employed to enhance those regions with low bearing capacity. Soil strength is improved using both mechanical and chemical stabilising techniques. In the mechanical approach, mechanical energy is employed (rollers, plate compactors, tempers, etc., depending on the choice or type of the soil) to enhance soil characteristics by compaction. Chemical Soil Stabilization is a chemical approach that involves blending and combining chemical additions to improve the soil’s engineering qualities. Chemical substances such as calcium lignosulfonate, granite dust, cement, and fly ash were added in. Although calcium lignosulfonate may stabilise a wide variety of soil types, it works best in soft soils and clay soils with moderate to medium flexibility. Granite dust is primarily used in clay soils with a lot of flexibility. KEY WORDS: Calcium lignosulfonate, Granite dust, soil, stabilization, subgrade


2012 ◽  
Author(s):  
Chris Ste-Croix ◽  
David Tack ◽  
Denis Boucher ◽  
Francois Ruel ◽  
Gilles Pageau ◽  
...  

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