ANALYSIS ON GRADATION AND INTENSITY OF COARSE AGGREGATE OF JNMC

Based on the research and application status analysis of concrete aggregate gradation,it is pointed out that the Talbol method can be applied to carry on the aggregate gradation analysis and optimization of mine coarse filling,and an analysis is carried on to the broken waste rock aggregate and the Gobi coarse sand gradation of the JinChuan mining area.According to the intensity orthogonal test,the results show that: under the same condition of cement dosage and concentration,the bigger the aggregate accumulation density is,the higher strength of test block is.And under the condition of same cement dosage,with the decrease of water cement ratio,the strength of test block increase observably.Under the condition of same concentration,the bigger the sand ratio is,the higher strength of test bock is.Compared with single type of aggregate,with the increasing of water cement ratio,the strength of mixture aggregate does not decrease dramatically due to the cement dosage dropping,thus the impact of aggregate gradation to the strength is very observant and the cement sand ratio should be optimized.