Korea Construction Technology Research Institute density by aggregate test material size density combination rate mixed density 13mm broken aggreg sand refined sand I 0.32 0.48 1.16 0.04 1 13mm 100 32 0 0 13mm 95~100 31.584 48 16 4 99.58 #4 55~75 2.336 39.984 15.6 4 61.92 #8 35~50 1.12 26.352 14.48 4 45.95 #30 18~30 0.8 11.616 3.808 4 20.22 #50 10~21 0.64 8.064 0.896 3.936 13.54 #100 6~16 0.384 4.416 0.112 3.72 8.63 #200 4~8 0.192 2.16 0.032 2.7188 5.10 II, III 0.81 0.09 0.07 0.03 1 19mm 100 81 0 0 81 13mm 95~100 80.271 9 7 3 99.27 #4 10~31 5.913 7.497 6.895 3 23.31 #8 10~21 2.835 4.941 6.447 3 17.22 #200 2~7 0.972 0.405 0.084 2.253 3.71