| Title |
Effects of Pozzolanic Admixture Replacement Ratio in Ternary Mortar on the Sulfate Attack Resistance |
| Authors |
Kwak Mi-Sook ; Kim Young-Su |
| Keywords |
sodium sulfate ; ternary mortar ; pozzolanic admixtures ; length change ; weight change ; sulfate deterioration factor |
| Abstract |
The purpose of this study is to investigate sulfate attack resistance of ternary mortar containing pozzolanic admixtures. 5% Na2SO4 solution was prepared to test the sulfate attack resistance of mortars. The mortar bars were cured (at 20±3 degree celsius) until they attained a compressive strength of 20.0±1.0 MPa. Compressive strength was measured using cubes made of the same mortar. Once cube passes target compressive strength of 20.0±1.0 MPa, mortar bars were immersed for 18 weeks. Tested mortar has 1:2.75 cement to sand ratio by weight. Blended cement mortars with fixed workability were tested for the compressive strength and length change, weight change, SDF(Sulfate Deterioration Factor), XRD, TGA (Thermo Gravimetric Analysis). According to the test results, it was obtained that the optimum replacement ratio of pozzolanic admixtures in ternary mortars was the mixture with 10% silica fume plus 30% fly ash and 10% rice husk ash plus 30% fly ash. |