EVALUATING STRENGTH CHARACTERISTICS OF FLY ASH CONCRETE WITH DIFFERENT GRADES OF CONCRETE WITH NATURAL AND RECYCLED AGGREGATE. International Journal of Food and Nutritional Sciences, [S. l.], v. 11, n. 8, p. 1921–1932, 2022. Disponível em: https://www.ijfans.org/index.php/Journal/article/view/8410. Acesso em: 11 aug. 2026.