亚洲色欲一本一道

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        The current position´╝ÜHome>>News
        concrete pump plugging causes and preventive measures
        Causes and preventive measures: (Q&A)
        1.Cement
        Q:using slag Portland cement, large water secretion, concrete segregation
        A:(1).mix with fly ash or increase cement amount, to reduce the water cement ratio
        (2).improve sand ratio
        (3).Add air entraining / low water reducing agent
        Q:the amount of cement is too small
        A:increase the amount of cement
         
        2.aggregate particle
        Q:coarse aggregate particle size is more than 1/3 of the pipe diameter.
        A:maximum particle size is less than 1/3 of delivery pipe
        Q:sand rate is too low
        A:increase the percentage of sand
        Q:sand, stone grading is bad
        A:adjustment ratio of sandstone
         
        3.Operation
        Q:concrete supply disruptions
        A:(1).Prepare for material supply plan according to pouring area
        (2).the operator to observe the hopper deposit material, non-pump empty
         
        4.pipe
        Q:pipe joints leaking cement slurry
        A:(1).the water pressure test after installation 
        (2).sufficient spare parts for replacement
        createtime 2013-01-13 author webmaster view count
        亚洲色欲一本一道

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