Civil Engineering - Concrete Technology - Discussion
Discussion Forum : Concrete Technology - Section 2 (Q.No. 8)
8.
Addition of pozzolana to ordinary port land cement, causes
Discussion:
20 comments Page 1 of 2.
James said:
4 years ago
The addition of pozzolana to ordinary Portland cement increases shrinkage but reduces the permeability of the concrete. It increases the elastic modulus of concrete. Less heat of hydration. Offers greater resistance to aggressive weather.
(1)
Saurabh Kumar Singh said:
4 years ago
Pozzolana increases the drying shrinkage.
Deepinder Singh said:
5 years ago
Decrease in early strength ------------- False. Increase the Early setting and sharing of cement.
Reduction in chemical action with sulphates --------> False. Increase resistance to chemical attacks.
Increase in shrinkage ----------->False they reduce shrinkage of the mortar to the cement.
Reduction in chemical action with sulphates --------> False. Increase resistance to chemical attacks.
Increase in shrinkage ----------->False they reduce shrinkage of the mortar to the cement.
Pathik said:
6 years ago
It decreases the shrinkage.
APG said:
7 years ago
It reduces shrinkage.
Abhik said:
7 years ago
It increases Shrinkage.
Bismoy said:
7 years ago
Pozzolonic materials are finner than cement particles thus, due to presence of these finner material (which have higher surface area) when cement comes in contact with it releases heat of hydration so water evaporates and promotes shrinkage.
Er.Indra Raj Joshi said:
7 years ago
It decreases the shrinkage not increase.
Govind said:
8 years ago
What is the relation b/w cement and shrinkage?
Vivek azad said:
8 years ago
Pozzolana react with free lime (which help to reduce shrinkage) in cement. So No free lime = increase shrinkage.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers