In order to realize the application of asphalt mastic in the sealing layer of the impermeable panel of water conservancy engineering,the slope thermal stability and low-temperature embrittlement tests of different asphalt varie-ties,asphalt and mineral powder ratio,filler and coating thickness were carried out,and the high and low temperature properties of different asphalt mastic were analyzed by marking line displacement and low-temperature embrittlement temperature.The test results show that the less asphalt is used,the higher the softening point,and the thinner the coat-ing thickness of asphalt mastic,which is conducive to improving the slope thermal stability of asphalt mastic in the closed layer,and the cement can effectively reduce the deformation capacity of asphalt mastic,thereby improving its slope thermal stability,but increasing the risk of low-temperature embrittlement.And through the on-site painting test,the specific construction parameters are determined,which can provide a good practical reference and guidance for the construction of the subsequent closed layer asphalt mastic.
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