【正文】 ecution conditions, the durability on the pitch road surface and hightemperature stability obviously improve. Test while going on in a large number of rooms while the modified pitch of SBS produces, carry on the onthespot experiment to its technical indicator after production, experimental result indicate outside mix % modified pitch of SBS , soften some , needle enter degree index meet modified pitch standardize the request, can make the match ratio design of the pitch mixture with the modified pitch of SBS . Second, the match ratio of the pitch mixture of SBS is designed In order to enable the mixture designed to reach the implementing effect, need to propose the following request from a great deal of respects , such as material requiring , construction craft , quality control standard and quality control method ,etc., hope to arouse attention. (1) , the raw materials are required Collect the material thickly by 11: For the thick collection material of layer the modified pitch mixture, should adopt the broken stone or garrulous gravel , its specification of footpath and quality requirement should accord with the regulation of pitch road surface construction technical specification of the highway (JTJ03294 ) should be clean , dry , has not weathered , not harmful to the impurity to collect the material thickly , and have certain hardness and intensity. should have good particle forms to collect the material that thick, when the broken gravel is used in the expressway , Class I Highway, should adopt the big gravel brokenly , and there should be two or more brokenness ones at least. 3, should choose the hard quality rock to collect the material in resisting the slippery top layer thickly (neutral or base igenous rock). Because there are greater differences in the glueing the relay of hard quality rock and pitch, the thick seizing which collects the material and pitch should not be smaller than 4 grades . To 3 5mm stone bits part it is relatively low because of the content, and this part forms the scary structure and has certain function to the pitch mixture, propose using the rock bits of hard quality (basalt). Collect the material thinly by 12 The detailed collection material includes artificial sand , natural sand. Each of pitch road surface should adopt the artificial sand as collecting the material thinly , it should be clean , dry , has not weathered , not harmful to the impurity to collect the material thinly, made up of proper particle, and have good seizing with the modified pitch, natural sand change with quality heavy(majority thick sand in being), relatively slick and sly form have, with the seizing difference of the pitch , exert a great influence on pitch mixture. To the expressway , Class I Highway pitch mixture, the content of the natural sand is unsuitable to exceed 20%, the stone bits powder of available 03mm replaces the natural sand. Pack the material by 13 Packing of layer should clean dry the mixture for modified pitch, specification requirement that quality should accord with the regulations of pitch road surface technical specification of the highway its. 1, the modified pitch mixture should be adopted the strong base rock (limestone , magmatic rock ) ,etc. to increase the building stones of swimming skill to rub the detailed ore powder that got to pack the material, ore it is dry clean , unsuitable to use mixture production do recovery powder , law of dust remo