Experimental study of the sameness effect of aggregates on the compressive strength of concrete

Subject Areas : محاسبات نرم در علوم مهندسی

Sajjad Ali-Mortazavi Kermani ¹ , Mohammad Reza Hamidian ² , Vahideh Rahimimehr ³

1 - Department of Civil Engineering, Faculty of Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran
2 -
3 - , Department of Architecture, Faculty of Art, Architecture & Urbanism, Kerman branch, Islamic Azad University, Kerman, Iran

Received: 2024-09-25 Accepted : 2025-02-28 Published : 2025-03-20

Keywords: Concrete, Aggregate diameter, Sameness aggregate, Compressive strength, Mix design,

Abstract :

One of the determinants of concrete quality is its compressive strength. One of the factors affecting the compressive strength of concrete is the appearance and diameter of its aggregates, and the shape, size, and granularity of concrete are important factors in concrete production. This paper analyzed part of the relationship and how the size of aggregates affects the compressive strength of concrete, and it seeks to answer the question, what effect does the use of aggregates with the same diameter have on the compressive strength of concrete? In this regard, an experimental method has been used to investigate the effect of the sameness of stone grains on the compressive strength of concrete. This way, after classifying the aggregates based on diameter into nine parts, 81 cubic concrete samples. The results of the investigation showed there is a direct relationship between the diameter of the aggregate and the compressive strength, and when the diameter of the aggregate is between 2.8 and 4 mm, the highest compressive strength is created. As the diameter of the aggregate decreases, the compressive strength increases. In supplementary research, samples were made in which the space between the aggregates was filled with cement paste. The results indicate an inverse relationship between the diameter of the aggregate and the compressive strength of concrete. As the diameter of the aggregates increases, the strength of the concrete decreases and when the diameter of the aggregates is between 22.4 and 25 mm the highest resistance is obtained.

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[26]استاندارد ملی شماره 4198، سنگدانه‌های بتن، واژه نامه