Page 146 - Water Standards
P. 146

are as follows:
                             1) It should usually be set up near the borrow area. In case,
                                high usage of aggregates, close transportation distance,
                                and available site, the aggregate processing plant may also
                                be set up near the concrete batching plant.
                              2 ) A coarse crushing workshop of artificial sandstone
                                processing should be set up as near the concrete system as
                                possible, in order to jointly utilize the storage area of the
                                product.
                             3) Foundations for major equipment shall be stable, and with
                                enough bearing capacity.
                             4) The necessary protection distance from residential areas
                                shall be maintained to reduce the influence of noise and
                                dust.
                           5  The volume of the aggregate storage area may be set at 50%⁃
                       80% of the monthly average value of peak periods, and during
                       periods of flooding and freezing when mining stops, an extra margin of
                       20% of usage during the mining period shall be allowed for. In addi⁃
                       tion, the volume shall comply with the natural dehydration require⁃
                       ments of the aggregate. If the total volume of the storage area is large,
                       more rough materials or semi⁃finished product should be stockpiled,
                       and the stockpile height may be relatively large.
                           6  Stockpiling and transportation of aggregate product shall meet
                       the following requirements:
                             1) The storage area shall have excellent sewage and drainage
                                systems.
                             2) Partition walls shall be set up to avoid mixing of various
                                aggregates, and the wall height may be determined ac⁃
                                cording to the angle of kinetic friction (34°⁃37°) of the
                                aggregate, and with an additional height of 0   5m.
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