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
The level of service defines the appropriate level of maintenance and the priority placed on the work. These levels can be used in planning, performing and evaluating the various maintenance activities with available funds. According to Indian codes, the priorities for levels of service are set for three possible levels of maintenance funding viz. (i) desirable level (highest level of funding) (ii) average level (iii) acceptable level (lowest level of funding). The main objective of a pavement maintenance management system is to provide a scientific tool to maintain roads at desired serviceability levels. It is also well accepted fact that due to paucity of funds it is not possible to provide the highest level of serviceability and hence there’s a need to evaluate the pavement conditions at lower serviceability levels. This case study demonstrates the determination of fund requirements for maintaining the urban pavement sections as per three serviceability levels defined as desirable, average and accepted. The analysis has done using HDM-4 shows the effect of changing the serviceability level on varying fund requirements and the pavement network condition. Also, the effect of applying the deferred maintenance to the urban pavement sections due to scarcity of funds is analyzed. The 23.7 Km road length of Noida urban city, near Delhi is selected for this study.
Cement based materials are quasi-brittle and are known to exhibit a highly stress-rate sensitive behavior. In structures that are subjected to impact forces, this causes concern in two ways: first the brittleness may result in catastrophic failure without warning and second, the properties of concrete during such events may be very different from those measured in standardized quasi static tests. Unfortunately, there are no standardized tests available for testing concrete under impact loading and there is significant confusion as to what constitutes an appropriate test. Concrete is a mostly used construction material in the world. As the use of concrete becomes wide spread the specifications of concrete like Durability, Quality, Compactness and Optimization of concrete becomes more important. Self Compacting Concrete (SCC) is a very fluid concrete and a homogeneous mixture that solves most of the problems related to ordinary concrete. Besides, SCC gets compacted under its own weight and there is no need for an internal vibrator for the body of the mould. This specification helps the execution of construction components under high compression of reinforcement. This paper concentrates mainly on studying the properties like workability and Impact strength of Fibre Reinforced High Strength Self Compacting concrete using Steel Fibres in various proportions ranging from 0 to 1.5 % for SCC mixes of Grade M 80.The resulting concrete is characterized in the fresh state by methods used for Self compacted concrete, such as Slump flow, V-funnel and L-Box tests respectively.
This paper presents an experimental investigation on the effect of partial replacement of cement by metakalion by various percentages viz 0%, 10%, 20%, and 30% on the properties of high performance concrete, when it is subjected to acid attack. An aggregate binder ratio of 2 and different water binder ratios viz 0.3, 0.35, 0.40 and 0.45 was used in this investigation. Concrete specimens of size 150 x 150 x 150 mm were casted to find residual compressive strength and specimens of size 100 x 100 x 100mm were casted to find percentage weight loss; both the sizes of specimens were casted and cured as per IS specification. After 28 days water curing, the concrete specimens were kept immersed in 5% concentrated acid solution for 30, 60 and 90 days for observation. Before immersion, they were weighed accurately and after required days of immersion and observation, the specimens were removed from acid media, weighed accurately and tested for their compressive strength; weight loss and hardness of concrete were studied. The various results which indicate the effect of replacement of cement by metakalion on HPC are presented in this paper to draw useful conclusions. The results were compared with reference mix. Test results indicate that use of replacement cement by metakalion in HPC has improved performance of concrete up to 10%.
In the present investigation a rational mix design is established and self compactability testing methods have been carried out from the view point of making it a standard concrete by using mineral admixtures like micro silica and fly ash for imparting High Strength Self Compacting Concrete. The flow properties of resulting concrete is characterized in the fresh state by methods used for Self compacting concrete, such as Slump-flow, V-funnel and L- box tests respectively. Further the mechanical properties compressive strength, split tensile strength and flexural strength of concrete are examined for High Strength Self Compacting Concrete mix of grade M100.
Cement Concrete is most widely used material for various constructions. When compared with steel, concrete is most widely used in construction. But concrete has some of the drawbacks like low tensile strength, less ductility, heavy weight, high shrinkage and high permeability. To overcome these drawbacks many researchers all over the world are actively involved in improving the properties of the concrete according to their applications. As a part of my research work an attempt is made to study the strength & durability of steel fibre reinforced Metakaolin blended concrete, when it is exposed to certain types of chemicals. Metakaolin is a thermally structured, ultra fine pozzolona, which replaces industrial byproducts such as silica fume, fly ash, etc.,. This paper presents experimental investigations carried out to evaluate the strength and the durability in terms of Chemical Resistance and weight loss of steel fibre reinforced concrete with and without Metakaolin for concrete of M50 grade. Concrete cubes are made with partial replacement of ordinary Portland cement by Metakaolin. Water to cementitious material ratio used is 0.55. The optimized dosage of super plasticizer is noticed as 1 % weight of binding material. In this investigation an attempt is made with chemicals like H2SO4 and HCl. Crimped Steel fibres with 80 as aspect ratio at 0, 0.5%, 1.0% and 1.5% of volume of concrete are used. The results show that the percentage of weight loss is reduced and compressive strength is increased in the case of Steel fibre reinforced concrete and concrete containing 10 % Metakaolin replaced concrete when compared to the normal concrete. Also the less percentage weight loss is noticed in the case of HCl and severe in the case of H2SO4.
