Which of the following ingredients of cement, when added in excess quantity, causes the cement to set slowly?
Silica
The clinker consists of several key compounds, primarily calcium silicates, calcium aluminates, and calcium ferroaluminates. It combines with silica, alumina, and iron oxide during burning to form the main cement compounds. It reacts with lime to form calcium silicates, which are primarily responsible for the strength development of concrete.
Important Questions from Cement
Refractory cement is rich in
The ______ in excess makes the cement unsound and causes the cement to expand and disintegrate
Match the apparatus for conduct of test in List 1 with the property of cement in List 2.
List 1
List 2
A. Vicat’s apparatus test
1. Soundness test
B. Le-Chatelier’s apparatus
2. Fineness
C. Briquette test method
3. Setting time
D. Air permeability method
4. Tensile strength
The cement becomes useless if its absorbed moisture content exceeds
In ordinary cement, about 99% of its final strength is achieved in _____.
