Question

Which of the following is the most efficient method of resisting sulphate attack on concrete?
1. Use of high alumina cement
2. Use of pozzolana
3. Use of air-entrainment
4. Use of sulphate resisting cement

Answer 1

Correct Answer - Option 4 : Use of sulphate resisting cement

Explanation:

Sulphate resisting cement:

• Sulphate Resisting Cement is a type of Portland Cement in which the amount of tricalcium aluminate (C3A) is restricted to lower than 5%, which reduces the formation of sulphate salts. The reduction of sulphate salts lowers the possibility of sulphate attack on the concrete.
• This cement provides maximum resistance to chloride ions and minimize the risk of corrosion of reinforced steel.
• Sulfate resisting cement is used in construction exposed to severe sulfate action by water and soil in places like canals linings, culverts, retaining walls, siphons, etc.