| Title |
An Experimental Study on the Property of Concrete with Expanded Perlite |
| Authors |
Jeon Hyun-kyu ; Seo Chee-Ho ; Kim Dae-hoi |
| Keywords |
Expanded Perlite ; Fine aggregate ; Thermal conductivity ; Lightweight aggregate |
| Abstract |
Improve thermal insulated in structure of building and examination of development existing material of material that can improve performance of structure is required.
There is expanded perlite that is having special quality suitable material to be used for composition material of building in various characteristic such as lightweight, incombustible, thermal insulation, sound absorption in this research.
But, is used circumscriptively. Therefore, was going to apply to concrete and estimate the performance. Hereafter, I wished to recognize about practical use of expanded perlite as insulating lightweight concrete aggregate.
Result that execute a concrete experiment that use in fine aggregate is as following.
1. According as the mixing rate increases 15% as result that average 2.25㎝ of slump value decreased. Air content was expose that 0.3～0.4% increases.
2. Unit weight decreased by unit of average 23kg/m3 and 10kg/m3 according as increase by mixing rate 15% of expanded perlite. Improvement effect that is high more than wet condition that test piece gets into dry is expected.
3. Concrete compressive strength that use expanded perlite in fine aggregate expressed Compressive Strength of 248～259kgf/cm2 in mixing design 210kgf/cm2. 240kgf/cm2's mixing design expressed Compressive Strength of 290～316kgf/cm2. Expressed higher value than 235kgf/cm2 and 279kgf/cm2 of standard mixing design.
4. Expanded perlite mixing rate rises, concrete compressive strength and tensile strength were fallen. Therefore, Choice of correct suitable mixing design to need in practical use usage.
5. Thermal conductivity is decrease average 0.059～0.067kcal/mh℃ according as increase by mixing rate 15% of expanded perlite. |