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R. Venkatasubramani

Bio: R. Venkatasubramani is an academic researcher from Dr. Mahalingam College of Engineering and Technology. The author has contributed to research in topics: Compressive strength & Fly ash. The author has an hindex of 6, co-authored 14 publications receiving 140 citations.

Papers
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01 Jan 2012
TL;DR: In this paper, a new design procedure was formulated for Geopolymer Concrete which was relevant to Indian standard (IS 10262-2009) and the applicability of existing mix design was examined with the geopolymer concrete.
Abstract: This experimental study is intended to identify the mix ratios for different grades of Geopolymer Concrete by trial and error method. A new Design procedure was formulated for Geopolymer Concrete which was relevant to Indian standard (IS 10262-2009). The applicability of existing Mix Design was examined with the Geopolymer Concrete. Two kinds of systems were considered in this study using 100% replacement of cement by ASTM class F flyash and 100% replacement of sand by M-sand. It was analyzed from the test result that the Indian standard mix design itself can be used for the Geopolymer Concrete with some modification.

115 citations

Journal Article
TL;DR: In this paper, a commercial finite element computer program ANSYS 12.0 has been used to perform a structural behavior of reinforced geopolymer concrete (RGPC) beam.
Abstract: This paper presents the flexural response of Reinforced Geopolymer Concrete (RGPC) beam. A commercial finite element computer program ANSYS 12.0 has been used to perform a structural behavior of RGPC beam. Using various parameters like stress, strain and Poisson's ratio obtained from experimental results, a model has been created in ANSYS 12.0. Experimental based analysis has been widely used as a means to find out the response of individual elements of structure with reinforcement ratio of 0.87% and 1.75% for grades M20, M25, M30 and M35 with companion specimens like cylinders. The results from both ANSYS 12.0 modelling and experimental data were compared. The observation was mainly focused on RGPC beam behavior at different points of interest which were then tabulated and compared. Due to high stiffness of reactive geopolymer concrete, the actual deflections of the beams were found to be slightly low allowable values under service loads. In ANSYS 12.0 the deflection obtained was found to be low due to meshing of elements in the modeling. The comparative result gives 20% difference for experimental and ANSYS 12.0.

20 citations

Journal ArticleDOI
TL;DR: In this article, the most important material used in the construction industry is concrete and adaptability with steel also provides the necessary tensile strength for constructing towering structures, however, it is difficult to find concrete materials that are suitable for large-scale construction.
Abstract: One of the most important material used in the construction industry is concrete. Adaptability with steel also provides the necessary tensile strength for constructing towering structures. However,...

11 citations

Journal ArticleDOI
01 Feb 2018
TL;DR: In this paper, an idea of using Super Absorbent Polymer in Bacterial Concrete was analyzed which increases the strength and durability properties of concrete and also acts as a protection to bacteria, where Self-Healing nature is viewed.
Abstract: Concrete usage in Construction becomes more common in this speedy world. Despite its benefits, concrete often exhibits crack which appear due to stresses. Larger cracks cause Structural integrity problems and smaller cracks may result in durability issues. A novel environmental friendly strategy to restore or remediate cracks formed in the structures is bio-mineralization of calcium carbonate using microbes such as Bacillus Subtilis (used in this study), as manual repair and maintenance is costly. In this Paper, an idea of using Super Absorbent Polymer in Bacterial Concrete was analysed which increases the strength and durability properties of concrete and also which acts as a protection to bacteria, where Self-Healing nature is viewed. In the span of 90 days, the results of Bacterial concrete cured under normal water providing nutrients inside with SAP shows healing up to 74 % and without SAP displays 49 % and when it is cured under nutrient medium, Bacterial Concrete having SAP displays healing up to 66 %, whereas without SAP it displays 57.4% of healing. During the observation it is discernible that the crack width ranging from 0.10 mm near 0.45 mm show better self-healing capacity. XRD analysis displays the presence of Calcium carbonate precipitation in cracks.

11 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the mix design, mechanical properties, durability and microstructure of GPC have been discussed to figure out and report the last data and information regarding geopolymer concrete.

273 citations

Journal ArticleDOI
TL;DR: In this paper, a mix design methodology for GPC with the main focus on achieving better compressive strength in an economical way for different alkaline solutions to binder proportions was proposed.

202 citations

Journal ArticleDOI
TL;DR: A review on currently reported mixture design methods of GPC prepared with slag and fly ash is presented in this article, where various methods are classified into three categories: target strength method, performance-based method, and statistical factorial model method.
Abstract: Geopolymer concretes (GPCs) can be produced by chemical activation of industrial by-products and processed natural minerals that contain aluminosilicate. There have been a few demonstrative constructions built using of GPCs as a greener alternative choice to Portland cement concrete (PCC); unfortunately, there is no standard or specification of guidelines for the design of GPC mixtures. This is partially because of so many variables affecting GPC manufacture, such as the property of raw materials, type and dosage of activator and curing scheme. Despite the fact of convention of building industry, the lack of proper mixture design method limits the wide acceptance of GPC in industry. In this paper, a review on currently reported mixture design methods of GPC prepared with slag and fly ash is presented. The various methods are classified into three categories: target strength method, performance-based method, and statistical factorial model method. The difference in the procedures, advantages and disadvantages among those methods are discussed. It is recommended that a proper design method should be chosen according to actual production situation and performance requirement of GPC.

148 citations

Journal ArticleDOI
TL;DR: In this article, the authors evaluated the mechanical properties of heat-cured low-calcium fly-ash geopolymer concrete and the behavior of geopolymers concrete beams using a flexural test with four-point bending, elastic theory, and a finite element model.

147 citations

Journal ArticleDOI
TL;DR: In this paper, a comprehensive experimental program was undertaken to analyse the structural and material characteristics of synthetic fibre reinforced geopolymer concrete and the results indicated that the macro polyolefin fibres exhibited the largest fracture energy which was likely due to high mechanical bonding and low fibre aspect ratio.

126 citations