| Title |
A Study on Field and Hydration Properties Ultra Rapid Hardening Mortar Using Magnesia-Phosphate Cement |
| Authors |
Kang In-Seuk ; Ahn Moo-Young ; Paik Min-Su ; Jung Sang-Jin |
| Keywords |
Ultra Rapid Hardening Mortar ; Magnesia Cement ; Mono-ammonium Phosphate |
| Abstract |
Ultra Super Early Strength Cement is a material that satisfies these requirements. early hydration heat however, is significant over regular concrete, thus discretion is advised for thermal cracks in accordance with heat generation when constructing a large-scale structures. In addition, the negative point that it is difficult to achieve required strength in a short period of time following rubbing process while retaining workability, the cement is being used conditionally for engineering material and Ultra Super Early Strength Cement for maintenance material for construction doesn’t exist. Magnesia Phosphate Cement, which is currently under studies in overseas uses no extra admixture and has strong points of Ultra Super Early Strength as well as favorable construction-ability and adhesive stability to the prototype concrete. These factors stem recognition that it could be used as maintenance material for construction of diverse applicability. In order to provide necessary data to increase practicality of the magnesia phosphate cement for Ultra Super Early Strength Mortar, the study performed SEM and XRD observation using the suggested composition to analysis reaction of hydration on the magnesia phosphate cement, and carried out simulate experiment on member of framework to review field applicability. |