A　series　of　disintegration　tests　was　performed　on　an　argillaceous　shale　in　various　acid　and　alkali　solutions,　from　which　the　relationship　between　the　percentage　content　of　different　size　particles　and　the　cycle　number　is　determined.　Results　show　that　the　lower　the　pH　value　is,　the　larger　the　percentage　composition　of　granules,　and　the　percentage　increases　with　the　increase　of　disintegration　cycles　and　finally　tends　to　be　constant.　Based　on　the　principle　of　energy　dissipation,　theoretical　computational　formulations　are　developed　for　the　incremental　surface　energy　and　cumulative　incremental　surface　energy,　and　the　influence　of　pH　on　the　cumulative　incremental　surface　energy　is　characterized.　The　incremental　surface　energy　decreases　with　the　increase　of　cycle　number　in　an　individual　disintegration　cycle,　and　is　significantly　influenced　by　acidity.　Lower　pH　value　may　lead　to　more　cumulative　incremental　surface　energy;　but　disintegration　characteristics　are　not　influenced　by　alkaline　solution.　The　energy　dissipation　of　argillaceous　shale　in　the　process　of　disintegration　is　characterized　as　a　logarithmic　function.　It　is　found　that　all　the　relationship　curves　have　the　same　attenuation　trend.　The　model　parameters,　which　are　inverse-analyzed　from　test　data,　decrease　analogously　with　the　increase　of　pH　value.　©,　2015,　Science　Press.　All　right　reserved.