Studies on Performance of Latex Based Coatings for Concrete Surfaces

Abstract

In this paper, we have demonstrated the effectiveness of latex based coatings applied over concrete surfaces by conducting water absorption test, abrasion test, chloride ion penetration test and heat resistance test. Fifteen types of water based coatings are formulated using water proofing latex as binder along with fly ash, Ordinary Portland Cement, feldspar, high alumina clay, kaolin, Micro silica, black clay, Zinc phosphate, alumina, Titanium dioxide, silica fume and clay as functional filler materials. Water permeability is a major issue in concrete structures. Thus, water permeability was assessed by immersing the specimen of size 40 mm diameter and 100 mm long in water for 48 h. Similarly, abrasion resistance was tested by scribing the coated surface of 100 × 100 × 10 mm tile specimen using E4 320 emery sheet. The most important chloride ion penetration was investigated according to ASTM C1202 by immersing disc specimen of size 80 mm diameter and 40 mm long in 3% Sodium Chloride solution in one end and 0.1 M Sodium Hydroxide solution in the other end. Finally, the heat resistance was determined by placing the 230 × 230 × 20 mm coated tile in a top loading type muffle furnace, by maintaining a constant temperature such as 75 °C, 100 °C and 150 °C. The results were very impressive towards the effectiveness and durability of the coatings.