50.
    发明专利
    未知

    公开(公告)号:FI68859C

    公开(公告)日:1985-11-11

    申请号:FI783095

    申请日:1978-10-11

    Applicant: DEGUSSA

    Abstract: There is provided a process for improving mineral asphaltic coatings for streets and roadways comprising preparing a mixture to be used as the base mineral asphalt coating material, homogeneously mixing in 0.1 to 10 weight % of silica which is either (1) a precipitated silica, (2) a precipitated and spray dried silica or (3) a pyrogenically produced silica and further working this mixture into a mineral asphalt coating for streets and roadways.

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