Study On Ore Material Grade Mixes Of Mixture Of Bitumen And Match Ratio Is Designed

Along with the national economy enhancement, our country highway construction development is rapid, at the same time, the motor transport also enters a fast development time, the volume of traffic increases, the heavy vehicles increase day by day, brings serious test on the bituminous pavement.At present, of our country road high grade road surface bitumen concrete road surface mainly, want , make road surface have enough to bear the weight of strength and good durability, except that there should be steady road bed , mainly depend on the structure of road surface compares with cooperation on storey of the structure of road surface . The road surface structure of high grade has already been basically settled. Because the restrictions of the material , construction equipment and construction craft , the structure of road surface basically finalizes the design . So, should change the serviceability of road surface and improve the service life of the service level of road surface , can only look for the outlet from match ratio of the bituminous concrete .Grade mix and the match ratio design method is that bitumen mix the key links of quality control the vast material that bitumen mix, it is a key to the bitumen road surface quality too. Thesis this through to the Jin Dynasty, Shan, three province would rather be own to build some expressways investigate and analyse, centre on Marshall design method mainly , combine revision to infiltrate index , launch hacking and studying carefully from the following aspects:(1) Bitumen mix , arrange , sink most large density , try on pieces of density research of method of testing;(2) Adopt different design , Marshall of country , best oilstone launch comparing than definite method of (bitumen consumption ) with and studying, revision of our country norm best oilstone than definite method of (bitumen consumption);(3) Research that Marshall tests match ratio and designs the index , including steady degree, the index value of the flowing value and three major volume indexes (Space rate W, ore material interval rate VMA, computing technology and index ;(4) determination of value of bitumen degree of saturation VFA ) study bitumen mixture try piece hit real shaping hit the real number of times, rut try on pieces of wheel grind briquetting roller grind number of times bitumen mixture influence of performance, current and normal shaping method of revision;(5) Study security mix bitumen ore material grades of problem of mixing of mixture , propose grades of range of buying adjust.