P. R. Kannan Rajkumar ¹, K. Divya Krishnan ¹, P. T. Ravichandran ¹, T. Aarthi Harini ¹

Affiliations
1 Department of Civil Engineering, SRM University, Kattankulathur - 603203, Tamil Nadu, IN

Abstract

Background/Objectives: The massive constructions releases enormous amount of pollutants to the atmosphere and studies reveal that the pollutants from the construction industry are more harmful than the pollutants from any other segment. In this work, the attempt is made to study, to reduce the pollution from cement and other materials used in the construction process with a view to create and develop greener methods of construction. Method: In the experimental study, bagasse ash is used in the manufacturing of paver block for low volume traffic road. Paver blocks as per the geometric dimensions were casted with the four trial mixes and tested as per the BIS and IRC standards. Findings: The compressive strength for cube and paver block was determined as per BIS and it shows the uniform result. A flexible pavement for low volume traffic road was designed and compared with BAPB road. Even the thickness of bagasse ash paver block is 70mm more than the conventional road; it shows the economical benefit in terms of construction and maintenance cost. Improvement: The usage of bagasse ash in manufacturing of paver block leads to lesser environmental hazards than conventional concrete, which leads to reduce the pollution and global warming. In addition, it shows the economical benefit in terms of construction and maintenance cost by replacing cement with bagasse ash in concrete paver blocks.

Keywords

Bagasse Ash, Comressivee Strength, Paver Blocks, Pavement

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P. T. Ravichandran ¹, A. Shiva Prasad ¹, K. Divya Krishnan ¹, P. R. Kannan Rajkumar ¹

Affiliations
1 Department of Civil Engineering, SRM University, Kattankulathur - 603203, Tamil Nadu, IN

Abstract

Objectives: In this work, the possibility of using crumb rubber powder was an additive to improve the strength of soft soil was investigated. Methods: Two types of problematic clay soils are stabilised with the various percentages of crumb rubber (5, 10, 15 and 20%). The strength properties of stabilized soils were improved by increasing percentages of crumb rubber up to 10% is studied by the CBR tests. In addition to strength development, the influences of this stabilizer type and different quantities on drainage characteristics are also studied. Findings: Addition of crumb rubber in both the soils shows desirable changes in permeability. With the addition of crumb rubber of 10% shows the improvement in CBR value of soil is 161% and 130 % in soil A1 and A2. The results obtained shows that both strength and permeability modification results in the better stabilization for clayey soil. Applications:  Increase in CBR value of stabilized soil can significantly reduce the overall thickness of the pavement and hence the total cost involved in the construction of road

Keywords

California Bearing Ratio, Crumb Rubber, Permeability, Stabilisation

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P. R. Kannan Rajkumar ¹, K. Divya Krishnan ¹, C. Sudha ¹, P. T. Ravichandran ¹, T. D. Vigneshwaran ¹

Affiliations
1 Department of Civil Engineering, SRM University, Kattankulathur - 603203, Tamil Nadu, IN

Abstract

Background/Objectives:The present generation of fly ash in the country is about 90 million tonnes and quarry dust is about 65 million tonnes. The utilization of fly ash in cement and other related industries is less than 10%. Safe disposal of remaining fly-ash and quarry dust has become a challenging problem. It is therefore necessary to utilize fly-ash and quarry dust in structural elements. The most basic building material for construction of houses is the usual burnt clay brick. A significant quantity of fuel is utilized in making these bricks and the burning of these fossil fuels liberate green house gases which cause depletion of ozone layer. Also, continuous removal of topsoil, in producing conventional clay bricks, creates environmental problems. Methods/Statistical Analysis: A feasibility study was undertaken on Fly ash-Lime-Gypsum (FaL-G) bricks and Quarry dust-Fly ash-Lime-Gypsum (QuFaL-G) bricks to use as a building element. The bricks of size 220 x 100 x 75mm were casted to study the strength and durability characteristics. Results shows that the compressive strength of FaL-G bricks was 8.2 N/mm2 on the 28th day, which is much higher than the conventional burnt clay bricks (>3.5 N/mm2). Findings:The water absorption property of FaL-G brick is lesser than the water absorption of normal good quality burnt clay bricks (20%). Applications/Improvements: In view of the strength and durability characteristics of these bricks, it can be used in place where the fly ash and quarry dust available more in quantity to solve the consequences of pollution and at the same time to build houses economically by utilizing industrial wastes.

Keywords

Fly Ash, FaL-G Bricks, Gypsum, Lime, QuFaL-G Bricks

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C. Sudha ¹, P. T. Ravichandran ¹, K. Divya Krishnan ¹, P. R. Kannan Rajkumar ², A. Anand ¹

Affiliations
1 Department of Civil Engineering, SRM University, Kattankulathur - 603203, Tamil Nadu, IN
2 Department of Civil Engineering, SRM University, Kattankulathur - 603203, Tamil Nadu

Abstract

Background/Objectives: National Green Tribunal which has taken cognisance of this and has enforced severe restrictions on sand mining from river beds and relevant laws for obtaining licence have been made very stringent. Hence there is a need to look for alternatives to river sand without sacrificing performance of concrete / mortar. Methods/Statistical analysis:  In this work, experimentally investigate the effect of M-sand in concrete by replacing the river sand (0%, 25%, 50%, 75% and 100%) and develop a high performance high strength concrete with target strength of 40MPa. Findings: The investigations are carried out to study the effect of M-sand on mechanical properties of concrete such as Compression, Tensile and Flexural Strength at the age of 3, 7, 28 and 56 days. Result shows that, there is a liner increase in compressive strength with the replacement of 0 to 100% river sand by M-sand. Replacement of 100% of river sand by M-Sand induced higher compressive, split tensile and flexural strength at the end of 28 days. The increase in strength was in the order of 12-18% as compared to concrete with river sand. Similar results also showed an increase in the strength parameters at the longer duration of curing periods. Applications: Studies revealed that, the use of M-sand in concrete for the construction purpose is acceptable for the concrete of grade upto M40 and also reduce the exploitation of river sand

Keywords

Compressive Strength, Flexural Strength, Flyash, M-Sand, Split Tensile Strength

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