Experimental investigate of strength parameters of concrete under acidic environment

Abstract

This paper mainly investigates about the weathering effect of acidiccuring environment on the strength parameters and durability concerns of concrete which is cured indifferent percentages of carbonic acid and nitric acid presence in water supplied for curing and in atmosphere. For this investigation procedures a concrete grade of M40 cubes with sizes 150mmx150mmx150mm, and a beam of size 150mmx150mmx300mm and 150mmx300mm concrete cylinders specimens are considered to check the performance of specimen in matters of compressive, tensile strength,Bending strength (flexure)respectively. By adopting the mix design samples, which are calculated based on locally available materials parameters. These mix design concrete samples are allowed to cured in water with the presence of the chemical concentration of 0,2,5,8 of nitric acid and carbonic acid by volume of water upto the curing duration period of 7,28,60days.The compressive strength of the specimens which are allowed to cure in the above specified percentage chemical concentration of the acid is observed that there is a decrease with age of curing increases. As far as the possibility in vitality increments with both level of corrosive and restoring age. By observing the overall data it is clear that the rate of deterioration is more at 60 days curing. The tensile and flexural stress at 28 days mentioned as that the vitality diminished with enhance in offer attention to corrosive. For an exact relieving age,both the internal strength and material of the specimen declines with an increase in the attention to corrosive. Likewise for an extraordinary consciousness of corrosive, theweight and strength of material observed as reductions with increase in the age and serviceability. It is clear in all the way that there is a close relationship between loss in weight of aggregate and reduction in compressive strength of the specimen. It can accordingly be reasoned that decay of cement relieved in acidic medium will increment with attention to corrosive and restoring age. The strength diminishes quicker as the solid ages. Along these lines, solid developments can't stand the trial of time in acidic surroundings until exceptional concretes two are utilized.