Informatics Publishing Limited

R. Thangaraj ¹, R. Thenmozhi ²

Affiliations
1 Department of Civil Engineering, CMS College of Engineering and Technology, Coimbatore-641 032, T. N., IN
2 Department of Civil Engineering, Thanthai Periyar Govt. Institute of Technology, Vellore-638 002, T. N., IN

Abstract

A large number of structural properties of plain concrete are improved with addition of admixtures to concrete. It is well known that the addition of fly ash to plain concrete improves workability, strength, durability, less permeable and more stable. In conventional concrete the flexural strength reaches a maximum value between 14 and 28 days. In high volume fly ash (HVFA) concrete the strength keeps on increasing with age because of pozzolanic reaction of fly ash and strengthening of the interfacial bond between cement paste and aggregate. The use of fly ash as a partial replacement for Portland cement will usually reduce water demand and bleeding of HVFA concrete ranges from negligible to very low. Only few research works have been carried out earlier on flexural study on R C conventional beams without fly ash. Therefore in this investigation an attempt has been made to study any likely improvement on the effect of fly ash on the properties of HVFA concrete in R C beam elements with confinement of stirrups in compression zone. It has been suggested that the effective use of fly ash minimizes the disposal of fly ash, which also solves an environmental problem. This HVFA concrete is easy to pump, consolidate and finish the surface, free from cracks, reduces carbondioxide emissions, superior environmental friendliness, reduction in stone mining since it consumes less volume of Portland cement. The methodology adopted above improves ductility and improves the rotation capacity of the joints of framed structure, thus, improving the ultimate load carrying capacity. An attempt is also made to compare the load versus deflection of the HVFA concrete beams with conventional RCC beams and evaluated the performances of the proposed method of confinement. The results indicated that the confinement in the form of stirrups improves the ultimate strength and ductile behaviour of the concrete (IS 3812-1981). An attempt has been made in the present paper to highlight the utilization of fly ash in construction.

Keywords

Fly Ash, HVFA Concrete, Plasticizer, Structural Properties, Pozzaolanic Reaction.

Full Text

   

R. Thangaraj ¹, S. Prakash ¹, S. Rakshana ¹, P. G. Sugeeja Guru ¹, M. M. Surya ¹

Affiliations
1 Coimbatore Institute of Engineering and Technology, IN

Abstract

The main object of this paper is to report and present the design and implementation of PWM based solar tracking system. Solar tracking allows more energy to be produced because the solar array is able to remain aligned to the sun. Our final goal is to develop an automatic tracking system which will keep the solar panels aligned with the sun in order to maximize efficiency. In this project we are trying to increase the solar power production and safety of solar power system. This project has two deferent parts those are solar tracker and PWM charge controller. We have tried to make a tracker which can track more sun intensity for the solar panel. For using the solar tracker system we can produce more energy than the analog solar system. In this project we have also tried to generate more efficiency than the other solar system by the PWM charge controller. Without charging the battery from the solar panel, the PWM charge controller made by us gives various kinds of protection like as night prevent current protection, load control, over charge control, show battery charge level and short circuit protection.

Keywords

Power Plant, Solar Tracker System, Charge Controller, MPPT Controller, PWM.

Full Text