Low Alkali UEA Expansion Agent for Concrete
Features
  *Improves the structure and grading of the void in the
 concrete apparently,lower the permeability of the concrete.
  * Cause 0.2-0.7 MPa compressive pre-stress in the interal
 part of the concrete structures under unrestrained and
 load-freed state,compensate the shrinkage.
  * Apply for waterproof/moisture proof of reinforced concrete structures.
  * Reduce the temperature stress at the top of the mess concrete structure.
  *Increase the proper distance of expansion  joints.
Specification

Item

 Specified   value
┃                                   		Test
read

Chemical
composition

   Magnesia %                            ≤ 5.0 2.40
  Water content %                            ≤ 3.0 1.25
  Total alkali content %                            ≤ 0.75 0.30
  Chloride ion %                            ≤ 0.05 0.02

Physical

properties

　

   Fineness   Spherical area/weight
         m2/kg          ≥		 250 340
  0.08mm sieve residue %     ≤ 10 6.3
   1.25mm  sieve residue %   ≤ 0.5 0
  Setting time     Initial set min                ≥ 45 2:00
   Final set h                    ≤ 10 2:30
Linited expansion ratio % In water 7d     ≥ 0.025 0.058
28d    ≤ 0.10 0.063
In air 28d    ≥ -0.020 0.018
Bending strength Mpa≥ 7d 25.0 33.5
        28d      45.0 55.8
Compressive strength Mpa≥ 7d 4.5 5.5
28d 6.5 6.5
     ** Fineness is denoted by spherical area/weight ratio and  
          1.25mm sieveresidue or 0.08mm   sieve residue  and 1.25mm
          sieve residue.The sphericalarea/weight and  1.25mm sieve 
          residue are  adopted   during  testing and certification.		 
Usage and Caution
    1)Should be test in laboratory to determine mix ratio with oncrete before use.
    2)Use level is  6%-8% of binding material weight, may mix together with 
cement,sand,stone and water.In special part,use level is 8%-10%.
    3)Please comply with the application technology rules of extra agent for concrete.

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