Assessing the influence of aggregates and cement type on the properties of roller compacted concrete

Authors

  • saad sarsam university of baghdad

Abstract

Roller compacted concrete pavement is suitable for heavy traffic and harsh environment. In the present investigation, roller compacted concrete slab samples have been prepared using two types of aggregates, (crushed and rounded), and two types of cement binder, (ordinary Portland and sulphate resistant). Cubes and beam specimens have been extracted from the slab samples with the aid of diamond saw. Specimens were tested for bulk density, ultrasound pulse velocity, compressive and flexural strength. It was observed that crushed aggregates exhibit higher compressive and flexural strength, and higher density regardless of the cement content or type of cement as compared with rounded aggregates. The compressive strength of mixtures with crushed aggregates is higher than that of mixtures with rounded aggregates by (9.4, 37.2, and 47.1) % and (5.7, 26.1, and 31.2) % for mixtures with (10, 12, and 16) % of Portland and sulphate resistance cement respectively. The flexural strength for mixtures with crushed aggregates is higher than that of mixtures with rounded aggregates by (19.7, 18.4, and 15) % and (13.4, 14.3, and 16.5) % for mixtures with ordinary and sulphate resistance cement content of (10, 12, and 16) % respectively. The bulk density for mixtures with crushed aggregates is higher than that of mixtures with rounded aggregates by (0.2, 0.65, and 2.5) % and (0.4, 1.0, and 2.3) % for mixtures with ordinary and sulphate resistance cement content of (10, 12, and 16) % respectively. Crushed aggregates are recommended for the roller compacted concrete to enhance the required flexural strength.

Downloads

Published

2021-09-08

Issue

Vol. 8 No. 2 (2021)

Section

Research Article

License

Declaration and Copyright Transfer Form

(to be completed by authors)

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

  • I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.
  • I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).
  • I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.
  •  I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

4. ________________

 

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.