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Q: Chemical curing is accomplished by spraying
  • A. Cement solution
  • B. Sodium silicate solution
  • C. Potassium Hydroxide solution
  • D. Sodium Hydroxide solution
Correct Answer: Option B - Chemical curing- Chemical membranes can be sprayed on to cure concrete. Liquid membrane forming curing compounds such as sodium silicate (water glass) solution retard or prevent evaporation of moisture from concrete. They form a film, fill the pores, scale the surface voids and prevent evaporation. The application should be made immediately after the concreting has been finished.
B. Chemical curing- Chemical membranes can be sprayed on to cure concrete. Liquid membrane forming curing compounds such as sodium silicate (water glass) solution retard or prevent evaporation of moisture from concrete. They form a film, fill the pores, scale the surface voids and prevent evaporation. The application should be made immediately after the concreting has been finished.

Explanations:

Chemical curing- Chemical membranes can be sprayed on to cure concrete. Liquid membrane forming curing compounds such as sodium silicate (water glass) solution retard or prevent evaporation of moisture from concrete. They form a film, fill the pores, scale the surface voids and prevent evaporation. The application should be made immediately after the concreting has been finished.