Experimental Study of Shear Failure of Damaged RC Beam Strengthened with GFRP
Antecedents of Variations in Construction Contracts - A Statistical Correlational Study
Dynamic Response of Footbridge Decks
Urban Green Spaces and their Role in Enhancing Quality of Life
Parametric Study on Structural Behaviour of RCC Box Culvert
Study on Strength Properties of Lightweight Expanded Clay Aggregate Concrete
A Step By Step Illustrative Procedure to Perform Isogeometric Analysis and Find the Nodal Displacements for a Two Dimensional Plate Structure
Lateral - Torsional Buckling of Various Steel Trusses
Comparative Study on Methodology of Neo-Deterministic Seismic Hazard Analysis Over DSHA and PSHA
A Step by Step Procedure to Perform Isogeometric Analysis of Beam and Bar Problems in Civil Engineering Including Sizing Optimisation of a Beam
Investigation on the Properties of Non Conventional Bricks
Analysis on Strength and Fly Ash Effect of Roller Compacted Concrete Pavement using M-Sand
Investigation on Pozzolanic Effect of Mineral Admixtures in Roller Compacted Concrete Pavement
Effect of Symmetrical Floor Plan Shapes with Re-Entrant Corners on Seismic Behavior of RC Buildings
Effect of Relative Stiffness of Beam and Column on the Shear Lag Phenomenon in Tubular Buildings
The paper presented herein was carried out to investigate the permeability characteristics of M100 High Strength Self Compacting Concrete (HSSCC) without fibers and with Steel fibers (Steel Fibers with aspect ratio 60:1). The test method involves cast of cylindrical specimens of size 100 mm diameters x 50 mm height, cured for 28 days before testing. The corrosion process is initiated by applying a constant voltage of 60 volts for a period of 6 hours as per ASTM C1202. In upstream reservoir is a 2.4 M NaCl (Cathode) and in the downstream reservoir is a 0.3 M NaOH solution (Anode).This results in the rapid migration of chloride ions from sodium chloride solution to sodium hydroxide solution, via the pore network offered by the concrete disc shaped specimen. The movement of chloride ions is proportional to the intensity of electric current as measured by an ammeter in the power source. The total charge passed in coulombs is determined and this is used to rate the quality of concrete as given in ASTM C1202 code.
Portland cement is energy intensive and not sustainable. The fines from hot mix plant have high potential to replace cement in making concrete. This paper reports the properties of concrete with waste fines from hot mix plant. All the materials used for the research were characterized. A concrete mix of M40 was designed using conventional ingredients. The cement was replaced by waste fines from hot mix plant in various percentages in making modified concrete. The resulting fresh concrete was tested for workability and the hardened concrete was tested for water absorption, density test, and compressive, split tensile and flexural strength. It was found that the concrete with fines from hot mix plant possesses better compressive strength and other properties compared to conventional controlled concrete. Hence the concrete with waste fines can be recommended as structural materials.
An experimental investigation has been carried out to study the effect of addition and substitution of micro calcite on strength and durability characteristics of High Performance Concrete (HPC). Various tests were conducted on HPC specimens including compression on cubes, split tension on cylinders and flexure on prisms to evaluate mechanical strength, water permeability, sulphate resistance and chloride resistance on cubes to evaluate durability characteristics. A total of 396 concrete specimens of standard sizes were cast with and without micro calcite and tested at different ages (i.e. 7, 14 and 28 days) to evaluate strength and durability characteristics of concrete following relevant Indian standard code procedure. Two different cases of incorporation of micro calcite in concrete viz. addition case and substitution case were considered, and in each case, five different dosage levels of micro calcite inclusion in concrete viz. 5%, 10%, 15%, 20% and 25% by weight of cement were considered. Test results indicate that incorporation of micro calcite in concrete either by addition or by substitution up to a certain level improves strength, durability and strength-to-weight ratio of concrete markedly, and any further inclusion beyond that level does not enhance the above properties of concrete. In addition, the improvement in mechanical strength at early age is higher than that at later ages for both cases of addition and substitution. Furthermore, optimum dosage level of micro calcite to achieve maximum gain in strength, durability and other engineering properties of concrete are 10% and 15% for addition and substitution cases, respectively.
In the analysis and design of multi-storey buildings, it is generally assumed that underlying soil is perfectly rigid and bounded to the structure. This assumption leads to gross error in assessment of the overall response under dynamic loadings. The Indian Code specifically gives no clear guidelines for design of high rise buildings in regions of soft soil. Hence it is very important to evaluate the extent of effect of such assumptions on the overall design. This paper deals with structural response of building under dynamic soil-structure interaction. Analysis for fairly stiff base soil has been carried out, using a powerful Finite Element Method (FEM) software package ANSYS v14.5. Results corresponding to fixed base and with consideration of soil-structure interaction have been compared and lead to some very important conclusions regarding time period, deflection and acceleration responses.
Processing and utilization of industrial waste and the development of new building materials is being given the top priority in the program of building research all over the world. This is important for achieving maximum disposal of wastes and conservation of scarce resources and materials. The non conventional bricks produced were about 29% lighter than conventional clay bricks. The non conventional bricks manufactured possessed compressive strength higher than clay bricks. This exceeds the best of load carrying clay bricks available and is several times better than acceptable commercially available common clay bricks. Other important characteristics of the non conventional bricks have been evaluated too. The values of these characteristics for non conventional bricks are excellent and have exceeded those pertaining to clay bricks. Moreover, non conventional bricks have been produced with a naturally occurring reddish colour similar to that of normal clay bricks. The new bricks and process have been patented. This paper presents the results of testing and the advantages gained by this type of bricks over conventional clay bricks. In this study, the effects of nonconventional material on the properties of bricks are studied and the behaviour of nonconventional bricks is compared with conventional burnt clay bricks. Generally bricks are made by top fertile agricultural soil but by using nonconventional material, 26 % of top fertile agricultural soil is saved.The various properties of nonconventional bricks like absorption, hardness, efflorescence, soundness, shape and size, crushing strength and basic compressive strength of the prism using different mortar mixes normally 1 : 3, 1 : 4 and 1 : 5 cement-sand mortar were studied.
