How to increase the strength of mortar or concrete, and additives for increasing the strength

摘要

PROBLEM TO BE SOLVED: To increase the strength of a cement-based hardened body while comparatively suppressing an expense.;SOLUTION: Samples 2, 3, 4, 5, and 6 are prepared by adding by weight, 0.025%, 0.050%, 0.075%, 0.10% and 0.20% of sodium erythorbate to a cement-based hardened body. Further, samples 7, 8 are prepared by adding by weight, 0.10% and 0.20% of sodium gluconate to the cement, and a sample 1 is prepared as an additive-unused sample. In the result of a compressive strength test, all of the samples 2 to 8 exceed the sample 1 and thus, there is no sample evaluated to be unacceptable. In the comparison of magnitude in strength due to the type of additives, it is found out that the erythorbate contributes to strength increase higher by about 1.1 times than the gluconate.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT