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Parthasarathi, N.
- Effect on Workability of Concrete due to Partial Replacement of Natural Sand with Gold Mine Tailings
Abstract Views :198 |
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Authors
Affiliations
1 Department of Civil Engineering, SRM University, Chennai - 603203, Tamil Nadu, IN
2 Structural Engineering, SRM University, Chennai - 603203, Tamil Nadu, IN
1 Department of Civil Engineering, SRM University, Chennai - 603203, Tamil Nadu, IN
2 Structural Engineering, SRM University, Chennai - 603203, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 35 (2016), Pagination:Abstract
Objective: Availability of fine aggregates in its natural form is becoming very scarce. It is becoming a challenging task to meet the demand for fine aggregates in its natural form without exploiting the natural resources. To sustain the construction activity, it becomes very essential to explore the possibility of utilizing alternative materials for fine aggregates. Large quantity of inorganic industrial waste is generated annually. Coal mine wastes, blast furnaces lag, iron ore tailings, red mud, zinc tailings, goldmine tailings etc., are some of the inorganic waste products that are generated. Methods/Statistical Analysis: In this investigation, an attempt is made to replace partially naturals and with gold mine tailings and study the behavior of concrete in the green state. Mix proportion for M25 concrete was obtained as per IS: 10262 guidelines, for normal concrete and concrete containing gold mine tailings as fine aggregates. Findings: Natural fine aggregates were replaced with 10%, 20% and 30% goldmine tailings on weight basis. In all five mixes were obtained and workability studies in the form of slump and compaction factor test were carried out. The slump for normal concrete was 84.33 mm and that for concrete containing gold mine tailings was 16.33 mm. The low slump for concrete containing gold mine tailings alone may be attributed to the presence of fine particles. The slump values for 10%, 20% and 30% replacement levels are 63.6 mm, 44.33 mm and 22.6mm respectively. Similar behavior is observed in the case of compaction factor test also. The decrease in the workability of concrete may be attributed to the increase in the fineness of resulting fine aggregates. Applications/ Improvements: The application of the gold mine tailing in the high scale structures and reduce cement by GMT.Keywords
Compaction Factor, Concrete Mix, Gold Mine Tailings, Slump.- Comparison of the Performance of Hexagonal Grid and Half-cuboctahedron Grid Tensegrity Systems in Roof Structures
Abstract Views :209 |
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Authors
Affiliations
1 Department of Civil Engineering, SRM University, Kattankulanthur, Tamil Nadu, IN
1 Department of Civil Engineering, SRM University, Kattankulanthur, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 35 (2016), Pagination:Abstract
Objective: To study and compare the behaviour of half-cuboctahedron grid and hexagonal grid tensegrity system. Methods/ Statistical Analysis: Ever since the discovery of tensegrity, most works have been concentrated on the classification and form finding techniques but very less on the mechanics of these structures. This study focus on the behaviour of two basic tensegrity modules, the half-cuboctahedron and hexagonal. Findings: Later, the study has been extended to tensegrity grids of spans 2x2, 4x4 and 8x8 of both the configurations (hexagonal modules and half-cuboctahedron modules) which were developed using an FEM based software. The grids were compared on the basis of nodal displacements and member forces, resulting in the half-cuboctahedron grid to be a more feasible configuration for large span roof structures. Applications/ Improvements: The application of the tensegrity structure is to applied in the large span roof structures.Keywords
Form Finding, Half-cuboctahedron, Hexagonal, Member Forces, Nodal Displacements, Tensegrity.- The Performance of Half-Cuboctahedron Grid Tensegrity Systems in Roof Structures
Abstract Views :189 |
PDF Views:0
Authors
Affiliations
1 Department of Civil Engineering, SRM University, Kattankulanthur, Kancheepuram - 603203, Tamil Nadu, IN
1 Department of Civil Engineering, SRM University, Kattankulanthur, Kancheepuram - 603203, Tamil Nadu, IN