Experimental study on potential of oyster shell ash in structural strength improvement of lateritic soil for road construction

2020 ◽  
Vol 13 (4) ◽  
pp. 341-351 ◽  
Author(s):  
Roland Kufre Etim ◽  
Imoh Christopher Attah ◽  
Paul Yohanna
Author(s):  
Manoj Kumar Mishra

Recycling of bituminous aggregates in cement concrete has been selected for the present study to determine suitability of recycled material in road construction. This will help in achieving economy in road construction as well as saving on environment degradation in term of reduced mining and less pollution. Construction and maintenance of roads and highways involve millions of tonnes of aggregate. Considering the scarcity of fresh aggregate, replacement of part of the fresh aggregate with recycled aggregate is considered in the present study. Construction of the road is quite cost intensive. Material alone cost more than 60% of the total construction cost, out of which aggregate cost component, is approximately 30%. We can use recycled aggregate in place of fresh aggregate in construction of road and provide economy to the project. For making best use of recycled aggregates, it is essential to study the suitability of the same in various pavement components. In the present study recycled aggregate are used in Granular Sub Base (GSB) and Wet Mix Macadam (WMM).


2017 ◽  
Vol 29 (11) ◽  
pp. 04017206 ◽  
Author(s):  
Emmanuel Mengue ◽  
Hussein Mroueh ◽  
Laurent Lancelot ◽  
Robert Medjo Eko

2020 ◽  
Vol 10 (3) ◽  
pp. 221
Author(s):  
Adeyemi Oluwaseun Adeboje ◽  
Williams Kehinde Kupolati ◽  
Emmanuel Rotimi Sadiku ◽  
Julius Musyoka Ndambuki ◽  
Abdulrazak Olaide Owolabi ◽  
...  

1994 ◽  
Vol 37 (3-4) ◽  
pp. 199-210 ◽  
Author(s):  
Umarany Mahalinga-Iyer ◽  
David J. Williams

2017 ◽  
Vol 7 (1) ◽  
pp. 126-136
Author(s):  
Сушков ◽  
Sergey Sushkov ◽  
Сергеев ◽  
Andrey Sergeev

The article describes the practical experimental study of two road structures, which used geosynthetic grid “Slavros GR” and in the form of honeycomb. Used materials and equipment for experimental research are described in details and graphically shown. A patent search of various designs of geosynthetic grids, used in road construction, is conducted. Materials used for the manufacture of polymer tapes are described in details. Positive and negative sides of geosynthetic gridsused in the experimental study are shown. There is an interesting offer for the location of the geosynthetic grids at a depth of 30 cm from the surface of the subgrade and geotextile material. Due to its location in the depth of 30 cm from the base surface of subgrade of geosynthetic grids and geotextile material the accumulation of moisture and water-saturated clay soil at the junction with the sand reduces, thereby eliminating the influence of frost penetration into the road structure. The authors have developed and proposed a new geosynthetic grid with honeycomb structure, containing seven nodes, with polymeric tapes and with the formation of six triangles which are in its turn are formed by a hexagon with six corner nodes and one central node. In an extended working position grid, stowed in place, represents the structure of a honeycomb with internal triangular cells directed to the center, which is filled with soil or stone bulk materials. The implementation of tapes in this way will increase the overall bearing surface of cell structure that will allow increasing its carrying capacity. The cellular structure of the honeycomb increases the resistance of pavement structures to the processes of cryotolerance soil on the slope by 30-40 %, and presence of the polymeric material of the rubber tape in the composition increases resistance to water erosion by 35-55 %.


2019 ◽  
Vol 25 (25) ◽  
pp. 1-7
Author(s):  
Mikhail Doudkin ◽  
Alina Kim ◽  
Murat Sakimov

Abstract The lack of a common methodology on compaction theory stimulates developers of road construction equipment to create various approximate methods for their calculation, the number of which, at the present time, is comparable with the nomenclature of the proposed designs of rollers. The article presents the analysis of the deformable shell behavior of a road roller, and the compacted material under its compacting roller, in a situation when a rigid circular shell of the roller is replaced by a forcefully deformable elliptical shape, which, unlike the circular design, allows variation, adjustment and optimization of the road roller impact on the material to be compacted.


2018 ◽  
Vol 26 (3) ◽  
pp. 304-310
Author(s):  
Kijoong Sim ◽  
Hongju Moon ◽  
Gyoojae Choi ◽  
Seungkee Koh ◽  
Youngchoon Lee

1976 ◽  
Vol 8 (8) ◽  
pp. 988-992
Author(s):  
A. E. Selyutin ◽  
P. P. Prokhorenko ◽  
E. I. Selyutina ◽  
I. S. Elenko ◽  
V. S. Golovenko ◽  
...  

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