STUDY OF MASONRY CONCRETE COMPOSITE BEAMS

Abstract

In the present era of Civil Engineering, R.C.C. construction is very much in practice. It requires formwork for wet concrete to set and harden. Skilled masons and labourers water tight formworks are required for good quality R.C.C. work. In case of loose shuttering cement slurry escapes through the narrow openings and as such purpose of the shuttering is defeated. These are quite expensive too. Also with the increasing awareness among the people to control the deforestation, availability of timber has become a quite difficult thing. Moreover timber shutterings can not be used for a long period. Keeping this view in mind present study on masonry concrete composite beams has been carried out. An .attempt has been made to take the advantage of brick masonry initially as a formwork and latter as a lost formwork. In the casting of beams shuttering was not required thereby saving the cost of shuttering. Theoretical analysis for first crack load by working stress method and ultimate load by limit state method has been presented in this dissertation. However, in the present study it has been found that steel did not take part in resisting the load due to inadequate bonding with concrete, thereby failure took place prematurely at quite a low values of ultimate load. On the basis of experience gained from this study as well as by proper construction and investigations covering various parameters, this type of section could be proved advantageous.