INFLUENCE OF SULFATE ION ENVIRONMENT ON THE CEMENT MATRIX MODIFIED BY REDISPERSIBLE POLYMERS

Injection of sulfate ions into the cement matrix with water by wet spraying due to high moist in environment is reason deterioration acceleration and durability decrease time. The effects introduction redispersible polymers (RP) calcium formate on increasing decreasing effect caused were studied. Vinyl-acetate/versatate, vinyl-acrylic copolymer mixed nine separate mixtures at a concentration additives 1 %, 3 % 5 respectively. Three different ion sprayed through fog using salt spray device “Salt Fog Chamber”. Test results showed that additive has various affects both deceleration structure reduction strength matrix. Vinyl-acetate/versatate concentrations 1% 3% have stability while maintaining level exploitational properties While, more resistance loss after 168 days withholding an aggressive compared %. Detailed observation formation shows relate hydrated minerals complexes organic salts. This allowed late age experiment under intensive impact SO42– migration encapsulating early ages hydration polymer films RP active Ca(OH)2 for formate. retain its shape long periods, become stable, reduce washing out soluble components ages, content Ca bonding it semisoluble compositions cause negative SO42–.