Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Civil

The atmost issue related to excess consumption of cement is the emission of CO2 and other greenhouse gases ultimately leading to environmental degradation. Global warming being the need of hour and which in turn has made the world’s industrialists to make efforts underway to enhance eco-friendly construction materials, conserving the rapid exhaust of natural non-renewables. A study reveals, the annual emission rate of carbonate burns in cement industries contributes around five to eight percent of the world’s greenhouse gas emissions and also it has become the second largest consumable next to water. Assessing the current scenario, polymer based concrete, Geopolymer concrete (GPC) is a latest innovation in the construction sector and an environment friendly construction material obtainedas a result of polymerization chainreaction of inorganic molecules. Also, demand for river sand has gone in great hike and ultimately become costlier and scarce in availability on account of various acts and legislations confronting illegal dredging of the same. Environmental &amp; economy aspects are better obtained, if locally available sources can be used, which aids in minimizing the cost. In such a case the manufactured sand (MS) is an economic alternative to river sand in concrete. The ultimate objective of this thesis paper is to assess the properties of flyash based Geopolymer concrete by using manufactured sand as fine aggregate. © 2019 Elsevier Ltd. All rights reserved.

VIT Unitversity

School of Civil Engineering

Chennai Campus

Materials Today: Proceedings

Investigation OnCompressive Strength Development Of Geopolymer Concrete Using Manufactured Sand

The present work focuses on comparing the performance of precast and monolithic wall joints subjected to cyclic loading. Experiments were conducted on 1/3 scale models of six types of precast wall connections and a monolithic connection. Precast walls were cast in two parts and the connections were made at 1/3rd height above footing slab. Reinforcement bars with different arrangements were used as dowels in the first three precast walls. Structural steel angle embedment with different configurations was used in the other three precast walls. Cyclic loads were applied manually till the failure of the specimens. The experimental results like ultimate load, displacements, cracking pattern, ductility and energy dissipation are compared to evaluate the performance of the developed connections. © 2019, Institute of Advanced Scientific Research, Inc. All rights reserved.

Department of Mathematics

School of Advanced Sciences

Vellore Campus

Journal of Advanced Research in Dynamical and Control Systems

Experimental investigation on precast wall connections

In today’s construction field material have very important role. Steel structures are more economical and can be used for long span members. So steel structures are preferred instead of concrete structures. To avoid damages during seismic activity steel structure should need to be more lateral stiffness and ductility. For this steel bracing are provided. Bracing transfer the lateral load due to seismic force and wind. There are different types of bracings are used in steel structures according to their placement and shape. Among the bracings, knee braced frame has excellent ductility and lateral stiffness. So, it has got more seismic performance. In this paper, a study on seismic performance of 4 different knee braced frames is to be performed. A static nonlinear analysis will be done using Ansys software. Results will be compared. © BEIESP.

World University root node

International Journal of Recent Technology and Engineering

Seismic performance of different bracing for steel frames

In recent years the population is increasing rapidly. Due to this reason the demand for housing is high as every year passes which results in saturation in area consumption. High rise buildings provide an effective and economical explanation for the problem. Tubular system is recent form of high rise building in order to resist lateral load. These are mainly of three types, diagrid, hexagrid and octagrid. Hexagrid system is form of new system for high rise building which were designed on strength and stiffness to withstand wind load and seismic load on a storey height more than 50. The study is mainly going to discuss about the behavior of high rise building using hexagrid system with different hexagrid sizes in module under earthquake loading. The optimum module sizes will be obtained for both equivalent static and non-linear dynamic analysis. A G+59 storey building with symmetric floor plan using equal consumption of steel for the different hexagrid sizes will be modeled in ETABS 2016. The examination and the investigation of conduct of the hexagrid with various module sizes will be examined. © BEIESP.

Structural behaviour of high rise building using different hexagrid sizes for earthquake loading

In modern construction concrete and steel are the important materials in RC Buildings. In that, steel plays a major role in strength and durability properties of the structures. The Chloride ion present in the concrete form a passive layer over the embedded steel in concrete causes breakdown. Corrosion of steel occurs due to chemical attack and environmental attack. Steel losses its strength due to corrosion and it needs to be protected. Geo-polymer concrete is a new alternative to conventional concrete. The engineering and construction industry has successfully engaged in challenge for consuming “Sustainable green and recycled products” in manufacture of concrete. In order to reduce the environmental problem related to disposal of Ground Granulated Blast Furnace Slag (GGBS) has potential to be used as concrete material. In this research paper, we deal with prediction of corrosion rate with various methods and also the mechanical properties of the GGBS based Geo-polymer Concrete. © BEIESP.

International Journal of Innovative Technology and Exploring Engineering

Study of corrosion of steel bars in Ggbs based geopolymer concrete

Industrial building is used to store any manufacturing products. Mostly these buildings are constructed with steel material. Ordinary steel structure are made up of truss as a roofing system with roof top covering, it is called as conventional steel building (CSB). Pre engineering building (PEB) is new type of building framing system adopted in the industrial building, the concepts is steel framing system, supporting members and roof covering are connected each other. Pre Engineering Building (PEB) systems being an alternative to conventional steel building in cost wise. Due to its less in dead weight, industrial building designed for lateral loads. To with stand the lateral load bracing are provided in the industrial structure. The aim of this research work is optimize the bracings for both conventional steel building structure (CSB) and Pre Engineering Building (PEB), analyze the behavior of structure under different loads by using Etabs software. Cost comparison of steel used for CSB and PEB are also studied. © BEIESP.

Effect of bracing under different loading for conventional and pre engineering industrial structure

Introduction of new eco-friendly construction materials like steel slag is being necessary and promoted where exploration of natural aggregates for construction is restricted due to environment cause. Ecology gets threatened by disposal issue of steel industry waste products (Steel slag). This study focused on the properties of steel slag and its technical suitability in a concrete as replacement to coarse aggregates. Effects on workability, mechanical and durability properties were studied. Steel slag mixed concrete found suitable in mechanical properties, when in increase in percentage of replacement to coarse aggregates is high, whereas workability acted adversely. Optimum replacement (30 to 75 percentages) observed maximum results. Surface characteristics were affecting on workability and durability properties intensively. Steel slag aggregates found stable against acid attack, permeability, expansion, abrasion and temperature. This study culminates that the steel slag mixed concrete improves the properties of concrete than controlled concrete. Utilization of steel slag mixed concrete leads to sustainable and cost effective development © BEIESP.

Technical feasibility of sustainable steel slag mixed concrete

High early strength concrete is fundamentally developed to provide a better solution to early housing and rehabilitation projects. Investigation in this project focuses primarily upon various industrial based accelerating admixtures which are dispensed in concrete mix in various dosages to obtain a high efficient mix. The specimens were casted and subjected to chemical and moisture curing. Fresh concrete properties like slump for workability and penetration resistance to analyse very early strength were done. Compressive strength at 1, 3, 7, 28 days were observed in order to identify the optimum dosage of accelerating admixtures. The result obtained showed that the type Y accelerator and chemical curing are the most suited to achieve high early strength concrete. © Published under licence by IOP Publishing Ltd.

Fulltext

IOP Conference Series: Materials Science and Engineering

Influence of different chemical admixtures in achieving high early strength concrete

The understanding of the dynamic behavior of structures is essential to design them to resist the lateral loads due to earthquakes. Recent past earthquakes have demonstrated the importance of proper designing of structural members to avoid damages in the buildings and loss of life. Generally the lateral load resistance of masonry infilled moment resisting frames is achieved by frame action and truss action. In this paper the seismic performance of a G + 9 storeyed masonry infilled RC framed building is evaluated by linear and non-linear dynamic analysis. The analysis is carried out using the finite element software-ETABS. The response spectrum and time history pertaining to the specifications as given in the Indian Seismic Code IS 1893:2016 is considered for the analysis. Three different frame models are studied namely, bare frame, fully infilled frame and soft storey frame to understand the lateral load resistance of the frames. The dynamic characteristics of the frames such as time period, frequency, mode shapes, storey displacements, inter-storey drift, over-turning moments and energy dissipation capacity are evaluated and compared. The fully infilled frame shows better seismic behavior than that of other two frames though it attracts more forces. © Published under licence by IOP Publishing Ltd.

Evaluation of earthquake load resistance of masonry infilled RC frames using linear and non-linear dynamic analysis

AbstractGeopolymer concrete is a booming technology in the construction industry. Much research is occurring in geopolymer concrete, as it emits low carbon dioxide into the atmosphere, is eco-friendly material and is an alternative for cement. This research mainly focuses on the use of fly ash based geopolymer concrete in ambient curing conditions and the use of manufactured sand due to the scarcity of natural sand. Mainly studies have evolved on the workability, setting time and compressive strength by the effect of ground granulated blast furnace slag (GGBFS), manufactured sand (M-sand), alkaline activator solutions to binder ratio and the proportions of sodium silicate to sodium hydroxide (SS/SH) in geopolymer concrete and mortar. The experimental studies were carried out using nine geopolymer concrete mixes and the comparisons were made. The workability of concrete decreases by increasing the percentage of GGBFS, M-sand and the proportions of SS/SH whereas workability of concrete increases when increasing the alkaline liquid to binder ratio. The compressive strength of geopolymer mortar and concrete increases when the percentage of GGBFS and M-sand is increased, and it decreases by increasing the alkaline liquid content. There is no change in strength by decreasing the proportions of SS/SH.