eng Science and Education Publishing American Journal of Civil Engineering and Architecture 2328-3998 2018-03-17 6 3 119 122 10.12691/ajcea-6-3-4 AJCEA2018634 article Amaziah Walter Otunyo umutuigili@yahoo.com 1 Ekiti Godknows 1 Faculty of Engineering, Department of Civil Engineering, Rivers State University, Nkpolu, Port, Harcourt, Nigeria The effect of potassium nitrate as an accelerator in plain concrete was investigated. Fifteen concrete cubes were cast with 0, 5, 10, 15 and 20 % by weight of potassium nitrate. The compressive strength was measured after 7, 14 and 28 curing days Other parameters including the workability, initial and final setting times were tested. Compressive strength of the plain concrete decreased as the content of the potassium nitrate increased. The workability and setting times decreased as the content of the potassium nitrate increased. http://pubs.sciepub.com/ajcea/6/3/4/ajcea-6-3-4.pdf concrete compressive strength potassium nitrate setting time and workability