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6. The results of 24-hour water absorption of specimens showed that the minimum water absorption related to the RCC6 mixing design with iron ore- powder filler, with amount of 2.24%, which is acceptable and ideal for dam construction projects. 7. The lowest VB time measured in the study related to the RCC4 mixing design with 3% mineral powder filler and 3% iron ore concentrate with amount of 15 seconds. 8. By studying the results of the filler’s chemical tests, iron ore powder knew to be close to the pozzolan group type F. 6. ACKNOWLEDGMENT Funding for this study was provided by MANA Construction Company. REFERENCES [1] USBR 4913. Procedure for water permeability of concrete. [2] J.F. Lamond, Significance of Tests and Properties of Concrete and Concrete-Making Materials, 2006, ISBN 0-8031-3367-7, pp. 595–601. [3] P.K. Mehta, P.J.M. Monteiro (Concrete: Microstructure, Properties, and Materials), fourth ed., 2014, ISBN 9780071797870. [4] American concrete Institute Committee 325.9R. Guide for construction of concrete pavements. ACI Materials Jornal 2015. [5] M. Dehqani pour, 1389, Instructions for implementation of general technical projects on construction works based on the publication No. 55. [6] American concrete Institute Committee207. Roller Compacted Concrete. 207.5R.ACI Materials Jornal 1998. [7] ASTM C114 - 15 Standard Test Methods for Chemical Analysis of Hydraulic Cement. [8] Iran national standard, 392, standard methods for physical Analysis of Hydraulic Cement. [9] Development and Promotion of National Building Regulations Office, ninth topic, 1392. [10] CRD-C 53. Test method for consistency of no-slump concrete using the modified Vebe apparatus. [11] USBR. Roller compacted concrete, design and construction consideration for hydraulic structures. Technical Service Center; 2005. [12] USBR 4906. Casting no-slump concrete in cylinder molds using vibratory table FreidinC. Influence of variability of oil shale fly ash on compressive strength of cementless building compounds. Constr Build Mater 2005;19:127–33. 943