Investigating the Effect of Cement Grading on the Characteristics of Concrete and Standard Mortar

Document Type : Original Article


1 Chief of research and development of Tehran cement Co, Tehran, Iran

2 Chief of physical Laboratory of Tehran cement Co, Tehran, Iran

3 Expert of Tehran Cement Quality Control Laboratory


Grading is one of the most important characteristics of cement, which has a great impact on its performance in concrete. The most common methods of monitoring are determination of residues on sieves, Blaine and LD. In this study, introduce the main parameters of cement grading, optimal limits and its effects. Also 204 samples of Portland cement were prepared to determine their physical and mechanical properties and performance of Laboratory concrete mixtures. One of the most important results is the clear effect of increasing the share of 3 - 30 µ particles and cement uniformity coefficient on the compressive strength of concrete and mortar and providing relationships. The results of LD- PSD experiments were well correlated with the experiments remaining on the sieve by alpine method. With increasing uniformity or the amount of particles of 3 - 30 microns, the setting time of cement paste increases (becomes longer); which is not always desirable


Volume 6, Issue 4
December 2022
  • Receive Date: 24 July 2022
  • Revise Date: 13 August 2022
  • Accept Date: 19 September 2022
  • First Publish Date: 01 December 2022