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

Document Type : Original Article

Authors

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

Abstract

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

Keywords

Main Subjects


Copyright © 2022 Ali Akbar Kafash Bazari. This is an open access paper distributed under the Creative Commons Attribution License. Journal of Civil Engineering and Materials Application is published by Pendar Pub; Journal p-ISSN 2676-332X; Journal e-ISSN 2588-2880.

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