BibTeX:

@article{IJIRSTV2I12122,
     title={An experimental Study on Early Compressive Strength Development for different grades of concrete},
     author={Zahid Bashir Bhat, muneeb anwar shah, irfan latief, sahil bhat and danish iqbal},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={2},
     number={12},
     pages={336--341},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV2I12122.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}

Keeping in view problems of cold weather concreting resulting in prohibition of concrete construction activities in author’s native land Kashmir, an attempt to overcome the problem of delayed setting and hardening of concrete leading to frost action and subsequent damage to concrete is made by studying the effect of chemical admixture (sodium nitrite) on early strength development for different grades of concrete. Three Grades of concrete selected for experimental study were M-15; M-20 & M-25.Five samples were prepared in each concrete grade having Sodium Nitrite dosage of 1%, 1.5%, 2%, 2.5% and 3% by weight of cement. The concrete specimens were tested for 3 day, 7 day and 28 day compressive strength and the results obtained were compared with those of normal concrete. The optimum percentage of accelerator that could be used without harming the properties of concrete was also assessed. The results concluded permissibility of using accelerating admixture (Sodium Nitrite) up to 2.5% by weight of cement and also the optimum percentage of accelerating admixture was found to be 2.5% with value of compressive strength being maximum at the age of 3 days and 7days for each grade, thereby validating the optimum dosage arrived experimentally.

Accelerator, Chemical, Compressive strength, Splitting tensile strength, flexural strength