Behavioral Studies on Sorptivity of the Concrete Blended with Nano Silica
Optimization of Lane Based Signalized Intersections through VISSIM at Outer Ring Road Bengaluru
Trend Analysis of Rainfall Data using Mann-Kendall Test and Sen's Slope Estimator
A Review on Sustainable Utilization of Bauxite Residue (Red Mud) for the Production of Mortar and Concrete
A Critical Review of Experimental Research on the Durability of Cement Modified with Partial Steel Slag Replacement
Estimating the Soil Moisture Index using Normalized Difference Vegetation Index (NDVI) And Land Surface Temperature (LST) for Bidar and Kalaburagi District, Karnataka
Roughness Evaluation of Flexible Pavements Using Merlin and Total Station Equipment
Site Suitability Analysis for Solid Waste Dumping in Ranchi City, Jharkhand Using Remote Sensing and GIS Techniques
Unsaturated Seepage Modeling of Lined Canal Using SEEP/W
Strengthening and Rehabilitation of RC Beams with Openings Using CFRP
A Seasonal Autoregressive Model Of Vancouver Bicycle Traffic Using Weather Variables
Prediction of Compressive Strength of Concrete by Data-Driven Models
Predicting the 28 Days Compressive Strength of Concrete Using Artificial Neural Network
Measuring Compressive Strength of Puzzolan Concrete by Ultrasonic Pulse Velocity Method
Design and Analysis of Roller Compacted Concrete Pavements for Low Volume Roads in India
Modernization and urbanization world-wide have led to the increase in many high rise buildings, industries and other commercial buildings. These structures incorporate large spans with column free spacing, urging the need of roofing system that can structurally support them. Folded plates and shell structures are those types of roofing systems that can support these large span structures, structurally as well as aesthetically. Folded plate structures have gained popularity and are being used extensively in Europe, America and Asia. Folded plates have wide range of applications as roofing systems in industrial structures, ware houses, coal bunkers, cooling towers, stair cases, auditoriums, etc. The present work is to analyze a northlight folded plate of span 20 meters, height 2 meters, manually by adopting an appropriate method of analysis which takes into account the effect of distortion for longitudinal stresses and transverse moments. The Whitney method is the appropriate method to analyze the northlight folded plate which considers the end plates as cantilevers. This method of analysis is a simplified mathematical approach in which the number of simultaneous equations to be solved is reduced to two. An attempt is made to model the same using STAAD.Pro.
Hyderabad is the 5th largest city in India. It has twin cities Viz., Hyderabad and Secunderabad with its suburbs extending up to 16 miles. The core cities, together with its nine surrounding municipalities are covering an area of 500 square km. The Hyderabad city discharges about 600 million litres per day untreated sewerage water into Musi River. A stretch of 13 Km from Nagole /Uppal IDA to Prathap Singaram is chosen as the study area as it is surrounded by more than 25 industries and their effluents are directly drawn into Musi River (IOSR-JESTFT 2012) [1]. The Musi River water is used for irrigation during its course of travel which leads to adverse effects on both flora and fauna. The bore well water samples in the radius of 1 km are collected at ten distant places at certain intervals along the Musi River to know the quality parameters. The collected samples are tested in the Telangana State Ground Water Department (GWD) to access the quality. The chemical analyses data for both Musi River and bore well water samples are obtained from the GWD for study and interpretation including its impact. Rainfall data of Uppal Mandal for 10 years beginning 2005 onwards is also collected from weather station of Acharya N G Ranga Agricultural University, Rajendra Nagar, and Hyderabad for further studies. It is worthy to note that only Nitrates are recorded as high in all the samples when compared to the BIS standards, otherwise, the remaining parameters are in the normal range [4]. Among 10 stations, 8 stations are having high Nitrate (NO3 as N) values in which the highest Nitrate value of 35.40 mg/lts is observed from station-5 of R-Krishnaiah Nagar (V), Hayath Nagar (M) and station-9 i.e. of Submerged Well situated within the radius of 1 km from Thimmaiguda (V), Ghatkesar (M). Further, it is observed that bore well water samples of 1, 3, 6 and 9 are witnessed with moderate concentration of EC, TDS, Cl, Cam TH and NO3 whereas Musi River sample collected near R-Krishnaiah Nagar is witnessed with moderate to high concentrations of EC, TDS, Cl, Na, K, TH and NO3 . The objective of the paper is to minimize the impact of effluents and industrial wastes discharged by the industries by establishing more treatment plants.
Scrap tyres are being accumulated in large volume, which is disposed into the environment through dumping yards causing damage to the eco-system. As the tyres are manufactured with synthetic rubber that has high carbon content, disposal of the waste has become difficult. It is estimated that approximately more than 70% of the wastes are disposed in improper way in various areas. Unique characteristics of the tyre shreds such as light weight, good insulation, good long term durability and high compressibility properties enable civil engineers to use waste tyres in civil engineering applications. Utilization of these waste tyres in the field of geotechnical engineering is a challenge to improve the characteristics of soil which is one of the essential materials used in construction projects. An experimental program of Standard Proctor tests, Permeability, Unconfined Compression tests and California Bearing Ratio tests were carried out on the specimens of two types of cohesive soil-tyre mixtures, by varying tyre powder content like 4%, 8%, 12% and 16% by weight of the soil. It is observed that after adding different percentages of tyre powder the shear strength of soil increases with reduction in seepage velocity.
This paper presents the heave behaviour of expansive clay reinforced with Synthetic-fibres. Expansive clay is common to many parts of central and southern India, as well as elsewhere in the world. It has caused significant structural damage to an alarming number of buildings, particularly light weight structures and pavements. The pressures generated by swelling of clay can be devastating to the foundation if not managed properly. The expansive potential of soil varies dramatically from one season to another at any site due to the change in moisture content, which is the driving force in swell/shrink cycle. In this study, research has been carried out to study the effect of Synthetic-Fibers (Polypropylene and Polyester fibers) in curbing the swelling tendency of expansive clays. The behavioral changes in the soil samples were determined using One Dimensional swell-consolidation tests. In addition, the strength characteristics of the soil were also determined using Unconfined Compressive Strength (UCS) tests and California Bearing Ratio (CBR) tests for varied range of percentages of Synthetic-Fibers induced (i.e., from 0.2% to 0.8%). The swell-consolidation and strength parameters of soil are accomplished for varied Synthetic-Fibers and it is observed that the swell pressure has decreased by addition of fibers where as the voids ratio has increased on addition of Synthetic-fibers. The UCS and CBR of the soil have increased by increasing the proportion of fibres.
Soil stabilization is a process which permanently changes the physical and chemical properties of soil. Soil stabilization is used to improve the bearing capacity of poor sub grade or sub-base soil to make it suitable to support structures like pavements, railways, foundations etc. Addition of nano particles to natural soil materials are often used to affect soil atomic structure thereby changing its permeability, strength and resistance properties. The addition of Cement (OPC) and terrasil is known to improve the strength of soils. This project primarily deals with the investigation of the strength characteristics of block cotton soil when mixed with a range of proportions of additives such as terrasil, fly ash and cement using CBR and UCC tests. The natural soil was tested according to Indian standards. The soil is classified as CH. Addition of cement and terrasil were based on the guidelines given by the ZYDEX Company. The test results show that the CBR and UCC values are similar for the proportions Cement (OPC) (3%) + terrasil (0.1%) and cement (OPC) (2%) + fly ash (5%) + terrasil (0.1%).
Soil is an abundant natural resource of ecosystem. In recent decades, serious contamination of soils have been reported due to the uncontrolled release of hazardous wastes like petroleum products, heavy metals, Solid waste dump site, oil spills etc. The environmental friendly solution for this problem is phytoremediation. This paper aims to study decontamination of naturally and artificially contaminated soils with heavy metals like lead, Cadmium, Zinc, Chromium using sorghum plant. The Geo-Environmental properties of virgin, naturally and artificially contaminated soils before and after remediation could be monitored by the basic index properties, suchas total organic content, PH, Electrical conductivity and the values are listed in Tables 1, 2, 3. The heavy metal concentration left in soil and plant after phytoremediation process could be determined by using Atomic Absorption Spectrophotometer (AASPM).
In general, the clayey soils reduces the enactment and lifetime of Civil Engineering structures, causing problems due to their low load carrying capacity. The Rapid growth of industries produces hazardous waste materials which act as a pollutant that affect the ecological system of the environment. Several researchers have used many additives to stabilize the soil as economical. Here, the stone dust has been used in the present study which possesses high calcium content. In this research, the effect of various sizes (5mm, 3mm, <75μ) of Stone dust with different proportions (5%, 7.5%, 10%, 12.5% and 15%) for untreated and treated soils were studied using direct shear, permeability, UCS (qu) and CBR tests. Also the modulus of elasticity of various soil mixes for sub-grade and sub-base have been determined. From the test results it has been concluded that the strength of the soil has been improved and there is a decrease in the permeability with the increase in the addition of stone dust.
