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Case Study on Noise Level in Mysore City

By
Naveen G.M 1, Vinay Kumar B.M2
1. Lecturer, Dept. of civil Engg, V.V.I.E.T, Mysore.
2. Lecturer, Dept. of civil Engg, V.V.I.E.T, Mysore.

Abstract
Sound comes from the vibrations in molecules, and is always traveling through a substance, whether it is a solid, liquid, or gas. Sound cannot travel through a vacuum because there are no molecules for the sound to travel through. Noise pollution (or environmental noise) is displeasing human-, animal- or machine-created sound that disrupts the activity or balance of human or animal life. A common form of noise pollution is from transportation, principally motor vehicles. Noise health effects are both health and behavioral in nature. The unwanted sound is called noise. This unwanted sound can damage physiological and psychological health. Noise pollution can cause annoyance and aggression, hypertension, high stress levels, hearing loss, sleep disturbances. In the present study, attempts are made to study the noise level range at different roads of the Mysore city. Traffic behaviour and characteristics at various roads near schools, hospitals, railway tracks, offices, courts, etc. using “Sound Level Meter”. Then, the maximum value of noise level in decibels is Estimated.

Keywords: Noise and Sound level meter.
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Effect Of Different Curing Methods On The Compressive Strength Of Concrete

By
O. James ,P.N.Ndoke and S.S.Kolo
Department Of Civil Engineering, Federal University Of Technology.
Minna.

ABSTRACT
Normal concrete was prepared with a water-cement ratio of 0.50. cube specimens were cast for testing the compressive strength at 7 and 28 days of curing respectively using three curing methods namely immersion, sprinkling and Plastic sheeting, curing to cure the cube specimens until the day of testing. Test results indicates that water curing (WAC) as well as sprinkling (spraying) curing provided much better results than membrane (Plastic Sheeting) method of curing. The rate of drying was significant when the specimens were subjected to membrane (Plastic sheeting) method of curing. This thus hampered the hydration process and thus affected the compressive strength property of the hardened concrete. The overall finding of this study suggests that concrete should be cured by water curing to achieve a better compressive strength.

Keywords:
Curing method, compressive strength, concrete
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IS 10262-1982 Vs IS 10262-2009: A Discussion

By Narasingha Mohanta
(Research Officer, Zonal Laboratory (R&B) Balangir)

Abstract:
IS:10262 is the code specified by Bureau of Indian Standards for Concrete Mix Design. The code came to existence in the year 1982. Keeping pace with the advancing technology the code has been revised in December 2009. Significant changes have been made in the revised version and a brief discussion is presented in this paper comparing the two versions of IS:10262. The basic points where the guidelines have been modified are discussed. Besides one numerical example has been solved using guidelines of both the versions to understand the differences. Though the 2009 version encourages mixing of mineral admixtures to meet greater challenges of modern concreting, a simple example is considered with use of no additives.

Introduction
Mix Design of Concrete is the process of deciding the proportions of the ingredients of concrete so as to be produced most economically, that would satisfy the desired properties of fresh and hardened concrete as well. In simpler words, the concrete should be well workable when fresh and the designed compressive strength as well as durability should be achieved at hardening.
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A Study of Axle Overloadings On A Rural Road In Nigeria

By
S.S. KOLO, (Civil Engineering Department, Federal University of Technology, Minna, Nigeria), Y.A.JIMOH (University of Ilorin, Nigeria) AND P. N.NDOKE(Civil Engineering Department, Federal University of Technology, Minna, Nigeria)

Abstract
This paper presents the outcome of the axle load survey on a section of a rural trunk road in Nigeria in order to ascertain the contribution of overloaded goods vehicles to pavement failure. Seven day classified traffic and axle load survey was conducted for the determination of ADT, percentage heavy vehicle and the imposed axle load at respective axle position for the traversing vehicles on the Old Jos –Kaduna road, Kaduna state Nigeria. The proportion of the vehicle laden weight carried by each axle and the corresponding standard axle load (sal) was computed with the index model of power 4. The percentage and magnitude of overloaded axles were respectively determined as an indicative measure of the extent of structural damage to the pavement. The studied pavement was overstressed up to five times beyond the Nigeria standard axle load of 80kN, which was too high and hence constituting the hindsight to frequent structural damage to road pavements in Nigeria. It was recommended that the axle load control with weigh-in-motion weighing bridges to assure protection of the road from failure be instituted that will impact less disturbance to normal traffic flow on the arterial.

Keywords
Commercial Vehicle, Average Daily Traffic, Design life, Axle Load, Gross Weight and Gross Vehicle Weight
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What is LiDAR and Discuss it’s Importance and Possibilities

By
Rahul
Department Of Civil Engineering, AWH Engineering College, Calicut-8,Kerala

ABSTRACT
This seminar paper on LiDAR mapping provides an introduction to a maturing technology used to acquire land based Digital elevation Models (DEM), and an existing mature technology used to acquire marine (undersea) DEMs. This seminar also goes through the use of LIDAR in space programs. Common to both the land-based and marine based systems by the use of lasers, integrated into what are known as Light Detection And Ranging systems, or LiDAR. The seminar begins with an introduction to LiDAR, and follows-through with how the systems are used, a description of land and marine variants, and statements as to what accuracy is attainable. Data products driven by applications are outlined, and the ability of these products to be integrated into a GIS is addressed. In turn and integral to the theme of the paper, evidence is presented to support applications developments that will ultimately benefit the public at large. Where valid, comparisons of LiDAR to other mapping technologies are presented to give the reader an understanding of current traditional practices. In many cases the combination of Li-DAR with other technology creates a result that is unachievable with a single methodology. Finally, conclusions are presented for discussion purposes that draw on the experiences of LiDAR.

INTRODUCTION
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