Road asphalt _3220 dynamic mechanical thermal anal

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Asphalt roads Dynamic mechanical analysis

Characterize the low temperature performance of asphalt . more fl 3 High build , etc.: road asphalt dynamic mechanical thermal analysis of 35 more high- temperature performance that is not satisfactory, the temperature susceptibility of asphalt is the degree of the improved needle of people characterized by a temperature index PI , that is 25. I5.30cc ( or 5cc) when the degree of needle were obtained by pressing the regression coefficient of d-# (P20-n porphyrin ■ brittle point t Ⅲ, penetration index value where PI , P for the needles were degrees ; A semi- logarithmic slope of the line ; K for the semi- logarithmic linear intercept. and then pin one index is calculated as follows : PI = ( 20-50oA (Ⅲ)) / (1 +50 AfPOl ¨) where , A i) for the pin on the number of people half- degree temperature, the slope of a straight line , PI says that the greater the temperature the better the performance of asphalt . is measured over asphalt Equivalent sample point and the needles were brittle index shown in Table 3, Table 3 shows , Zhenhai, 70 were older than 90 , 100 compared with 140 Karamay crack resistance and temperature stability of low temperature difference ; Karamay 9O than 110, Jiangyin 7O low temperature resistance than 9o Better crack resistance and temperature stability ; Yumen low temperature cracking resistance after aging and temperature stability worse. Dynamic mechanical analysis of the results obtained with this exactly the same , so the technical nature of the road asphalt DMA analysis can help Analysis in particular,[link widoczny dla zalogowanych], low temperature performance of asphalt within the temperature and low temperature sensitivity, avoid grading of the needle caused by human error selection.