Composition for protecting a body of concrete, a process for preparing same, and a method for the protection of a body of concrete

A process for preparing a composition for the protection of concrete, said process comprising:

• comminuting calcium carbide to a particle size of 0.063" to 0.118" (0.16-0.30 mm);
• treating lime at 2012.degree. F. to 2732.degree. F. (1000.degree.-1500.degree. C.) for 4 hours to a moisture content of 2 to 3% by weight to prepare dried lime and comminuting the resulting dried lime to a particle size of 0.063" to 0.079" (0.16 to 0.2 mm);
• mixing under stirring said comminuted calcium carbide having a moisture content of 6 to 8% by weight and said comminuted treated lime with sodium nitrate, sodium carbonate, sodium sulfate, calcium chloride, cement, sand and water with the following proportion of said components, in % by weight:
• ______________________________________ sodium nitrate 0.9-1.8 sodium carbonate 2-3 sodium sulfate 2.5-3.6 calcium chloride 0.05-0.15 calcium carbide 0.75-1.15 lime 0.8-1 cement 36-40 sand 49-39.3 water 8-10. ______________________________________