Use of fly ash as filler for asphalt pavement and its manufacturing method

摘要

The object of the present invention is to develop a recycling technique for a filler used as a filler of road asphalt concrete for use as a fuel in a thermal power plant instead of the old limestone and as a filler for coal ash (fly ash) produced as a by-product .;In order to realize this, according to the present invention, as a result of experiment using 4% of fly ash, 10% of coarse aggregate, 62% of medium aggregate, 24% of sand and 5.0% to 6.5% of asphalt in place of limestone, Which is the result of the research.;After the specimens were prepared with 4 samples by the above method, the samples were immersed in a constant temperature water bath at 60C for 24 hours and then subjected to the Marshall stability test. As a result, the asphalt content was 1.1 %, It can be concluded that the mechanical and physical stability can be improved, and it is possible to produce excellent products that satisfy the test regulations and road construction specifications.;As a result of the test, the stability values were 929 ~ 1058kg / from 5.0 to 6.5, and the stability was more than 2 times higher than the stipulated values. The density, porosity and saturation were 5.0 ~ 5.5%.;As a result, the fly ash filler can reduce the amount of asphalt when mixed with the above products, and recycles the waste coal ash without reclaiming it, resulting in enormous economic benefits (over 30 billion won per year) And it can be expected to replace imported crude oil as a result of the decrease in the amount of asphalt.