Abstract: The osmotic crystallization waterproof material has a good protective effect on the surface of concrete products. Experiments verified an Osmotic crystalline surface protectant (OCSP) could form a hydrophobic complex in the pores or cracks of concrete and affect the waterproof and corrosion resistance of the surface layer of concrete. The water absorption of the test pieces with a coating amount of 225 g/m2 is less than 0.4%, which is about 75% lower than that of the untreated test pieces, so the OCSP has a function of dense filling and water penetration resis-tance. The resistance to penetration and water repellency of the mortar layer was reduced as long-term immersion in strong electrolyte solutions such as acid, alkali and salt, the strong acid has obvious damage and erosion on the surface of mortar. However, in the environment of alkali and salt solution, the surface density and weight of the mortar would be increased, the mortar layer with OCSP has obvious delayed chemical attack and the carbonization depth was close to zero for 28 days as concrete coated with 200—300 g/m2 which could well prevent the neutralization of reinforcement protection layer of concrete members in ordinary environment.
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2020, Vol. 34 
