Experimental study of indirect tensile strength of calcareous coal gangue mixture

The calcareous coal gangue, fly ash, lime powder and a small amount of cement mixture, which are selected from the Hanxing area, are mixed into a calcareous coal gangue mixture. An experimental study was done on the cleavage strength of this mixture. According to the method of uniform design, 8 groups of test matching scheme of calcareous coal gangue mixture were designed. The experiments were conducted on calcareous coal gangue mixtures in various matching proportions. The experimental results are analyzed by regression analysis model. The regression equation between the calcareous coal gangue mixture indirect tensile strength (cleavage strength) and the admixture dosage is established. By using the regression analysis model, the influence of the dosage of fly ash, calces, and cement on the calcareous coal gangue mixture's indirect tensile strength is analyzed.