Evaluation of Compressive Strength Characteristic on Micro-organism Mixed Blast Furnace Slag Mortar

미생물 혼합 고로슬래그 모르타르의 강도특성 평가

In construction material field, one of the ways to reduce $CO_2$ generation and environmental load is to decrease the use of cement materials. In this study, the cement material was replaced with a by-product from iron production which called BFS(blast furnace slag), when mortar specimens were made and it was expected to reduce environmental load significantly. Moreover, the added value can be created by using a by-product and cutting the production cost of concrete and mortar. 5 types of mixing water, BFS and the activator($Ca(OH)_2$) were used to make mortar specimens and the compressive strength test was carried out. All specimens were cured for 3, 7, 28days. As a result, all experimental groups had better strength than a control group. Above all, 2F-1 group had superior strength to the others. In order to raise confidence of the results, microstructure of mortar was observed and each specimen was analyzed. SEM images from all groups were compared with each other, and the area and the volume of micro-pore were measured through the porosimeter analysis. Through this research, it was tried to examine the potential for developing zero cement mortar and applying the micro-organism as a natural admixture material.