Effect of reducing the amount of coarse aggregate on some properties of self-compacting concrete

المؤلفون

  • A. Emhemmed Department of Civil Engineering/Faculty of Engineering/University of Bani Waleed, Libya مؤلف

DOI:

https://doi.org/10.58916/jhas.v8i3.171

الكلمات المفتاحية:

SCC، flow test، J-RING test، ratio of coarse aggregate

الملخص

 

Abstract: In recent years, self compacting concrete (SCC) has become widely used especially in crowded reinforced concrete structures with difficult casting conditions. For such applications, fresh concrete must possess high fluidity and good cohesion. One of the most important projects in which this type of concrete was used is the foundation system for Khalifa tower  in Dubai, which is the most important high-rise building in the world. The content of coarse aggregate has a significant impact on the properties of the required concrete. Some studies have suggested that the total volume of coarse aggregate be within 50% of the solid concrete volume.

In this research, six mixtures were studied with different combinations of water-cement ratio and coarse aggregate quantity. Slump test (flow test) ,      (J-RING test) and concrete strength determination test were performed to determine the effect of reducing the amount of coarse aggregate in the mixture on some fresh and hardened properties of self compacting concrete (SCC).

The results showed that reducing the amount of coarse aggregate used in concrete requires increasing the amount of water required for mixing to achieve the required flow of self-tamping concrete, which leads to a decrease in the strength of concrete, and that the best ratio of coarse aggregate to the total aggregate is 65%, as it provides the highest resistance to concrete and achieves flow required, and using a percentage higher than that leads to not achieving the required flow and crossing completely.

التنزيلات

تنزيل البيانات ليس متاحًا بعد.

المراجع

American Concrete Institute , " ACI 237-07: Self-Consolidating Concrete", 2007.

European Research Project "Guidelines for Testing Fresh Self-Compacting Concrete" , Sep. 2005 .

EFNARC, "Specification and Guidelines for Self-Compacting Concrete" , February 2002 .

British Standard Institution, "BS 1881: Testing Concrete, Part 116: Method for determination of compressive strength of concrete cubes", London, 1983.

Japan Society of Civil Engineering, Recommendations for Construction of Self-Compacting Concrete, JSCE (1998.(

Okamura, H., “Self-Compacting High-PerformanceConcrete,” Concrete International, Vol. 19, No. 7, pp.50-54 (1998).

Okamura, H. and Ozawa, K., “Mix-design for Self-Compacting Concrete”, Concrete library of JSCE, Vol.25, pp. 107-120 (1995).

Yurugi, M., Sakata, N., Iwai, M. and Sakai, G., “Mix Proportion for Highly Workable Concrete,” Proceedings

التنزيلات

منشور

2023-09-07

إصدار

القسم

Article

كيفية الاقتباس

A. Emhemmed. (2023). Effect of reducing the amount of coarse aggregate on some properties of self-compacting concrete. مجلة جامعة بني وليد للعلوم الإنسانية والتطبيقية, 8(3), 377-384. https://doi.org/10.58916/jhas.v8i3.171

الأعمال الأكثر قراءة لنفس المؤلف/المؤلفين

<< < 1 2 3 4 5 6 7 8 9 10 > >> 

المؤلفات المشابهة

1-10 من 40

يمكنك أيضاً إبدأ بحثاً متقدماً عن المشابهات لهذا المؤلَّف.