SARAT KUMAR DAS | National Institute of Technology Rourkela (original) (raw)
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Papers by SARAT KUMAR DAS
Journal of material cycles and waste management, Apr 24, 2024
Mining, Metallurgy & Exploration, Dec 21, 2023
Springer transactions in civil and environmental engineering, Oct 26, 2023
Reviews in Environmental Science and Bio/Technology, Oct 16, 2023
Transportation Geotechnics, Aug 31, 2023
International Journal of Geotechnical Engineering, Apr 21, 2016
Ocean Engineering, Dec 1, 2011
Geotechnical and Geological Engineering, Apr 19, 2018
European Journal of Environmental and Civil Engineering, Nov 18, 2022
Bulletin of Engineering Geology and the Environment, May 14, 2022
Background and Aims Surface protection of coalmine overburden (OB) dumps against shallow slope fa... more Background and Aims Surface protection of coalmine overburden (OB) dumps against shallow slope failures can be achieved through a cost-effective and sustainable solution, i.e., vegetative cover. Hence, small scale study is needed to study the survival, growth performance, and root distribution of plants prior to conducting pilot scale study. Methods In the present study, three plant species Dendrocalamus strictus (Bamboo grass), Cymbopogon citratus (Lemon grass), and Chrysopogon zizanioides (Vetiver grass), an endemic grass species are studied for the slope stabilization potential of OB dumps in Jharkhand, India. Growth characteristics and root architecture of grasses grown for five months under six varying proportions (treatments) of overburden, cow dung, and garden soil were studied. Results It was found that Vetiver grass had the highest root area ratio, followed by Bamboo grass and Lemon grass. The maximum root cohesion was found to be 1 kPa for Bamboo grass, 7.33 kPa for Lemon ...
Lecture notes in civil engineering, Nov 24, 2022
Recent Developments in Sustainable Infrastructure, 2020
This paper presents a study based on laboratory model tests conducted with rectangular footing on... more This paper presents a study based on laboratory model tests conducted with rectangular footing on unreinforced and geosynthetics reinforced crusher dust. The test was conducted at loose (RD = 29%) and medium dense (RD = 64%) state of crusher dust taking the variation of single layer depth of geosynthetic placed below foundation to find the maximum ultimate bearing capacity. The single layer depth was varied at a depth of 0.2, 0.25, 0.3 and 0.35B for loose state of crusher dust and for medium dense state, it was varied with 0.3, 0.4 and 0.5B (where B is the width of the footing). Also geogrid along with geosynthetic (stagged one above another) was used below footing at the optimum depth to find their combined effect. It has been observed that the inclusion of reinforcement at various depths provided below footing gives higher ultimate bearing capacity compared to unreinforced condition at both relative density states. For loose state, the optimum single layer depth of geosynthetic was found out to be 0.3B and for medium dense state, it was found to be 0.4B. The percentage variation of ultimate bearing capacity of reinforced crusher dust with respect to unreinforced at loose state (0.3B) was 112.56% and for medium dense state (0.4B) was 71.15%. Increase in relative density along with addition of reinforcement layer to the crusher dust has great impact on the bearing capacity of footing. At both the reinforced and unreinforced conditions, higher density produced higher result than the loose dense state of the material. Combination of geosynthetic and geogrid used as a single layer below footing at optimum depth for RD 29% and RD 64% resulted in higher ultimate bearing capacity compared to the single reinforcement and the percentage variation with respect to unreinforced condition, it is found out to be 121.85% at RD 29% and 74.46% at RD 64%.
Indian highways, 2015
Compaction property defines the important property of soil. Laboratory compaction test is perform... more Compaction property defines the important property of soil. Laboratory compaction test is performed to find out the moisture content to achieve desired dry density to be adopted at site for all types of soil. Commonly used laboratory light and heavy compaction tests best describe in-situ smooth wheel roller compactor. In this research work, a laboratory vibrator compactor (called NITR compactor) has been developed using a rotary hammer, in which shank with energy transferring plunger is fitted in locking sleeve of hammer an is used for the compaction of granular soil. Suitability of this has been checked for both coarse grained and fine grained. The compaction results show that the maximum dry density obtained from NITR compactor for different types of soil is comparable with the result of heavy compaction test and is greater than the result of light compaction test. The in-situ field compaction test results using vibratory compactor is also compared with the present test. The devel...
Arabian Journal of Geosciences, 2021
In this study, the experimental investigation of model footing on crusher dust as an alternate gr... more In this study, the experimental investigation of model footing on crusher dust as an alternate granular soil with geotextile and geogrid as reinforcement is discussed. The experimental investigations were made separately with geotextile and geogrid with one to three layers in model tests at different relative densities. The bearing capacity was obtained from the load-settlement curve using the double-tangent method. The experimental results were validated through finite element analysis using commercial software Plaxis 3D. The friction between reinforcement and crusher dust is more than compared to that of natural sand, which may be due to surface roughness of crusher dust. The variations in bearing capacity of footing on geotextile and geogrid at different relative densities are compared in terms of bearing capacity factor Nγ. A parametric study was also presented in terms of variations of bearing capacity ratio of model and real-scale footing.
KSCE Journal of Civil Engineering, 2018
Geotechnical and Geological Engineering
Journal of material cycles and waste management, Apr 24, 2024
Mining, Metallurgy & Exploration, Dec 21, 2023
Springer transactions in civil and environmental engineering, Oct 26, 2023
Reviews in Environmental Science and Bio/Technology, Oct 16, 2023
Transportation Geotechnics, Aug 31, 2023
International Journal of Geotechnical Engineering, Apr 21, 2016
Ocean Engineering, Dec 1, 2011
Geotechnical and Geological Engineering, Apr 19, 2018
European Journal of Environmental and Civil Engineering, Nov 18, 2022
Bulletin of Engineering Geology and the Environment, May 14, 2022
Background and Aims Surface protection of coalmine overburden (OB) dumps against shallow slope fa... more Background and Aims Surface protection of coalmine overburden (OB) dumps against shallow slope failures can be achieved through a cost-effective and sustainable solution, i.e., vegetative cover. Hence, small scale study is needed to study the survival, growth performance, and root distribution of plants prior to conducting pilot scale study. Methods In the present study, three plant species Dendrocalamus strictus (Bamboo grass), Cymbopogon citratus (Lemon grass), and Chrysopogon zizanioides (Vetiver grass), an endemic grass species are studied for the slope stabilization potential of OB dumps in Jharkhand, India. Growth characteristics and root architecture of grasses grown for five months under six varying proportions (treatments) of overburden, cow dung, and garden soil were studied. Results It was found that Vetiver grass had the highest root area ratio, followed by Bamboo grass and Lemon grass. The maximum root cohesion was found to be 1 kPa for Bamboo grass, 7.33 kPa for Lemon ...
Lecture notes in civil engineering, Nov 24, 2022
Recent Developments in Sustainable Infrastructure, 2020
This paper presents a study based on laboratory model tests conducted with rectangular footing on... more This paper presents a study based on laboratory model tests conducted with rectangular footing on unreinforced and geosynthetics reinforced crusher dust. The test was conducted at loose (RD = 29%) and medium dense (RD = 64%) state of crusher dust taking the variation of single layer depth of geosynthetic placed below foundation to find the maximum ultimate bearing capacity. The single layer depth was varied at a depth of 0.2, 0.25, 0.3 and 0.35B for loose state of crusher dust and for medium dense state, it was varied with 0.3, 0.4 and 0.5B (where B is the width of the footing). Also geogrid along with geosynthetic (stagged one above another) was used below footing at the optimum depth to find their combined effect. It has been observed that the inclusion of reinforcement at various depths provided below footing gives higher ultimate bearing capacity compared to unreinforced condition at both relative density states. For loose state, the optimum single layer depth of geosynthetic was found out to be 0.3B and for medium dense state, it was found to be 0.4B. The percentage variation of ultimate bearing capacity of reinforced crusher dust with respect to unreinforced at loose state (0.3B) was 112.56% and for medium dense state (0.4B) was 71.15%. Increase in relative density along with addition of reinforcement layer to the crusher dust has great impact on the bearing capacity of footing. At both the reinforced and unreinforced conditions, higher density produced higher result than the loose dense state of the material. Combination of geosynthetic and geogrid used as a single layer below footing at optimum depth for RD 29% and RD 64% resulted in higher ultimate bearing capacity compared to the single reinforcement and the percentage variation with respect to unreinforced condition, it is found out to be 121.85% at RD 29% and 74.46% at RD 64%.
Indian highways, 2015
Compaction property defines the important property of soil. Laboratory compaction test is perform... more Compaction property defines the important property of soil. Laboratory compaction test is performed to find out the moisture content to achieve desired dry density to be adopted at site for all types of soil. Commonly used laboratory light and heavy compaction tests best describe in-situ smooth wheel roller compactor. In this research work, a laboratory vibrator compactor (called NITR compactor) has been developed using a rotary hammer, in which shank with energy transferring plunger is fitted in locking sleeve of hammer an is used for the compaction of granular soil. Suitability of this has been checked for both coarse grained and fine grained. The compaction results show that the maximum dry density obtained from NITR compactor for different types of soil is comparable with the result of heavy compaction test and is greater than the result of light compaction test. The in-situ field compaction test results using vibratory compactor is also compared with the present test. The devel...
Arabian Journal of Geosciences, 2021
In this study, the experimental investigation of model footing on crusher dust as an alternate gr... more In this study, the experimental investigation of model footing on crusher dust as an alternate granular soil with geotextile and geogrid as reinforcement is discussed. The experimental investigations were made separately with geotextile and geogrid with one to three layers in model tests at different relative densities. The bearing capacity was obtained from the load-settlement curve using the double-tangent method. The experimental results were validated through finite element analysis using commercial software Plaxis 3D. The friction between reinforcement and crusher dust is more than compared to that of natural sand, which may be due to surface roughness of crusher dust. The variations in bearing capacity of footing on geotextile and geogrid at different relative densities are compared in terms of bearing capacity factor Nγ. A parametric study was also presented in terms of variations of bearing capacity ratio of model and real-scale footing.
KSCE Journal of Civil Engineering, 2018
Geotechnical and Geological Engineering