| Title |
Improvement of the Floor Impact Noise of Concrete Slab Using SBR Latex-Modified Mortar |
| Authors |
Lee Won-Hak ; Haan Chan-Hoon |
| Keywords |
Floor Impact Noise ; SBR Latex-Modified Mortar ; SBR Latex Polymer ; Marerial Test ; Strength ; Tension |
| Abstract |
In this study, a method of construction to reduce both light-weight and heavy-weight impact noises was sought. In order to achieve the noise reduction efficiency, the structure was designed to substitute the mortar layer, the closest to the impact source, as SBR latex-modified mortar which can directly attenuates floor noise and vibration. Since mortar must has a standard of strength, series of material tests were performed to characterize the material properties using different mortar specimens mixed with 0 %, 5 %, 7 % and 9% SBR latex. The optimum mixing ratio was determined by material tests and after all 7 % SBR latex-modified mortar was prepared to investigate the effect of SBR latex on floor impact noise reduction. The slump and strength tests also demonstrate that 7 % SBR latex-modified mortar is the optimum mixture proportion. Comparing the wet structures suggests that Specimen 2 (i.e. SBR latex-modified mortar laminate) shows better noise reduction performance over Specimen 1 (i.e. unmodified mortar laminate) by 1 dB at the heavy-weight impact levels. The light-weight and heavy-weight impact tests demonstrate that the SBR latex-modified mortar generally gives better noise reduction characteristics than the unmodified mortar over the full range of frequencies except 63 Hz and the benefit become outstanding as the frequency reaches above 125 Hz. |