FUNDAMENTAL STUDY ON THE EFFECT OF THE AMOUNT OF MINOR ADDITIONAL CONSTITUENTS IN CEMENT ON THE ACTIVITY INDEX TEST RESULTS OF MICRO POWDER FOR ULTRA-HIGH STRENGTH CONCRETE

In response to the reexamination of the upper limit of minor additional constituents in Portland cement, the effect of the amount of minor additional constituents in Portland cement on the activity index test results of micro powder for ultra-high strength concrete was examined. As a result, it was confirmed that even if the mixing ratio of the minor additional constituents was increased from the current JIS upper limit of 5% to twice that amount (10%), the activity index test results did not change significantly.