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    A hard rock, bluish in color, which is crushed and used for construction purposes. The byproduct Blue Metal may replace sand and will be an artificial sand and will be used in construction of....
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    A hard rock, bluish in color, which is crushed and used for construction purposes. The byproduct Blue Metal may replace sand and will be an artificial sand and will be used in construction of buildings. 
    We offer a wide range of blue metal chips that are acquired from our own quarry. 
      
     
    Available Sizes of Blue Metal - Aggergates
    1. 20 mm
    2. 12mm
    3. 25 mm
    4. 40 mm
    5. 6 mm
    6. Quary Dust (CRF)
    7. 63/40
    8. 83/150
    9. Filter Stone

    10. Boulders/Soling Stone
    11. Bond Stone
    12. Wet Mix
    13. Dry Mix
    14. Crusher run
    15. GSB with dust mix (0-40mm) 
    16. GSB with natural sand mix (0-40mm) 
    17. Hill Earth
    18. Murrum

     

    STANDARDS FOR AGGREGATES
    Aggregates and test methods. These new Standards will change the way in which we look at our aggregates, although the materials will be the same there is a new way of defining aggregate sizes, different sieve sizes with new grading and a new set of tests for physical and mechanical properties. 
    AGGREGATE SIZE (d/D)
    Sizes are now described using two sieves a lower sized sieve (“d”) and a higher size sieve (“D”) and is now classed as d/D, an old 20mm single size stone will now be classed as 10/20 e.g. “d” equals a 10mm sieve and “D” equals a 20mm sieve. For all-in aggregates “d” is 0. 

    BS 63                          New EN 
    Size                                Size
    40mm                            20/40
    28mm                            20/32
    20mm                            10/20
    14mm                          6.3/14
    10mm                             4/10
    6mm                              2/6.3
    3mm                               1/4  
    CRF                               0/4 all-in
    Fine Sand                       0/2FP 
    GRADING CATEGORY (Gc)

    There is now a Grading Category (Gc) which specifies the percentage of material passing d/D, therefore a 10/20 would have a grading category Gc85/20 this means that up to 85% of the material can pass the 20mm sieve (D) and up to 20% can pass the 10mm sieve (d).

    The grading for a 10/20 Gc85/20 would be

    Sieve Size                    Percentage Passing
    40mm                                      100
    31.5mm                               98 – 100
    20mm                                  85 – 99
    10mm                                    0 – 20
    4mm                                      0 – 4

    FLAKINESS (FI)
    The Flakiness test has changed you now use a bar sieve along with the new sieve sizes, the results are lower then the old method and for Asphalts a Flakiness of less then 35 is now acceptable FI35.



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