| Title |
The Study on Properties of Mortar using Heat-Treatment Discarded Bentonite Power by Particle Size |
| Authors |
Oh Sang-Gyun ; Kim Hyo-Youl |
| Keywords |
Discarded Bentonite ; Heat-Treatment ; Particle Size ; Flow ; Compressive Strength ; Concrete Mineral Admixture |
| Abstract |
As the bentonite is main material to prevent from collapse of drilling hole at underground excavation works, it is increased using quantity on construction industry day by day. But, the discarded bentonite that is over using at underground excavation works is caused various environmental trouble as soil and water pollution. Therefore, this study aims to propose a fundamental report for pozzolan reaction of discarded Bentonite powder by heat-treatment and cooling as concrete mineral admixture. The discarded bentonite powder used on this study is calcined discarded bentonite slurry by 600℃?60min & cooling using of water, and changed of maximum particle size to it's pozzolan activity ability. The experiment are performed flow test & compressive strength test on age of mortar using discarded bentonite powder. As a result of flow test, flow of mortar using discarded bentonite powder is reduced than plain Mortar and is a little difference on maximum particle size of discarded bentonite powder. On compressive strength test, mortar compressive strength using discarded bentonite powder is increased that it's particle size is smaller than smaller. Especially, compressive strength of mortar using it's particle size below 38㎛ is similar to plain mortar at two weeks age and improved 5% than plain mortar at four weeks age. |