Repair Techniques and Remedies for Structural Flaws Failure in JUIT

Abstract

Even though Jaypee University has excellent structures that are made of highest level and maintenance of all the structures in and around are maintained it was evident that no concrete structure is free from environmental factors and human error. So in this project I intend to recommend solutions and remedies for such concrete and masonry structural failure and help the university. The first chapter is based on the formation of calcium carbonate efflorescence on roof slab of the first floor of the academic block It is situated in hilly area and due to orographic precipitation the weather here is rainy. Therefore buildings may face problem of dampness and water leakage. Due to large diurnal temperature variation and alternate wetting and drying conditions, cracks appear on the surface of concrete. A crack was observed at the time of placement of conduits pipe after casting of the slab. Pipe was concealed using a rich mix of mortar. Here the defect has been appeared due to the internal cracks in concrete slab. Water percolating from this crack is creating appearance of white scales on the repair work and this is ruining the appearance of slab too. This defect on the slab was due to calcium carbonate efflorescence. In this paper, remedies for the presented calcium carbonate efflorescence are suggested. The internal cracks in concrete slab are believed to be the prime cause of this type of defects. In hilly area, due to orographic precipitation, moisture content in this region is high and the buildings here may face the problem of dampness and water leakage. A white scaling with percolating water is observed under roof slab in the academic block (1th floor) of JUIT, Waknaghat. The prime cause of white scaling (as shown in Fig.1 and 2) defect was a chocking of conduits pipe after casting of slab due to any weight and at the time of wiring these chocked pipes are replaced by new ones. It is observed that during the chiseling of concrete slab for replacement of conduits pipe, the internal cracks has been appeared in the slab. On that repair position a whitish material (lime) appeared. It may be due to any type of efflorescence. Due to water percolating under roof slab, reinforcement may be corroded. Carbonation test was performed to rule out corrosion. So from tests results and inspections the