The Primary Benefits of Using Forton™ VF-774 are:
• Elimination of the seven day wet cure required to achieve the maximum strengths of the GFRC composite.
• Significant improvements in the long-term durability of the GFRC composite, especially the maintenance of the long-term flexural strain to failure property, i.e. ductility of the composite.
Important: Components should be mixed in proper sequence. Standard concrete mixers may be used, but it is recommended to use a high shear mixer specially designed for GFRC to ensure a thoroughly mixed, lump free slurry is produced.
Step 1: Weigh or batch all materials.
Step 2: Add all liquids, including VF-774 and 2 oz. of plasticizer, to mixer.
Step 3: Start mixer on slow (300-500 rpm).
Step 4: Add pigment if used.
Step 5: Add sand.
Step 6: Add cement and increase mixer speed to high (1,000-1,800 rpm).
Step 7: Mix for 1 – 2 minutes.
Step 8: Add the remaining plasticizer to achieve desired workability.
Step 9: Reduce mixer speed to slow (300-500 rpm) and gradually add fiber (Premix only) until dispersed (typically not more than one minute). Important: Mixing too long or at too high a speed after fiber has been added can filamentize or damage the fiber, resulting in placement issues and reduced strengths.