| Concrete is the most widely used in civil engineering, the largest amount of building materials. But due to the tensile strength of concrete disadvantages of sound insulation, low heat resistance and low, concrete building frames when needed in appearance with a layer of insulation and sound-absorbing Board. Not only increase the quantities and increase the thickness of the wall.This wood fiber concrete is made with wood fiber-aggregate concrete. Has good sound absorption property of wood fiber from wood fiber doping increases the porosity of concrete to improve sound absorption. In this essay we through orthogonal experiment design on C30 concrete of tie than for research, research its 7d and 28 D of strength, obtained optimal tie than, and in optimal tie than Xia mixed into different mixed volume of wood fiber, preparation out different wood fiber content of concrete, and on basic mechanical performance and sucking sound performance for experiment research, analysis has wood fiber on C30 concrete of enhanced heat sex effect of effect. The main research is that:(1) Maintain the same base concrete in the case, to substitute different wood fiber volume fraction of fine aggregate concrete, respectively, air drying of wood fiber and study on basic mechanical properties of saturated State. That, with the increase of wood fiber volume fraction, wood fiber concrete of compressive and bending properties decreased.(2) Keep under the condition of normal concrete mix proportion unchanged, with different volume fraction of fiber concrete block water immersion test in 40 days, analysis of permeability of wood fibre concrete and solution pH value. Wood fiber concrete is obtained with a certain capacity for absorption and degradation of carbon.(3) Keep under the condition of normal concrete mix proportion unchanged, with different volume fraction of fiber concrete with 200 Hz, 500 Hz, 900 Hz, 1200 Hz, and 3000 Hz sounds to simulate the acoustic test, analysis of wood fibre concrete to road traffic noise improvements. That wood fibre concrete in 500Hz~900Hz within the frequency range of sound-absorbing work best. |
