Engineering and Technology Journal

Effect of Adding Recycled Sand and Fines Retained from Eggshell Waste on the Mechanical Properties and Durability of SCC and SFSCC

Document Type : Research Paper

Authors

1 Laboratoire de Mécanique des Sols et Structures. Université de Constantine. Algérie

2 Université des Frères Mentouri, Constantine1, Algeria.

Abstract

This scientific research was carried out within the framework of contributing to the recovery different of natures of waste, and making it possible to minimize using of natural aggregates in the field of construction, in order to place an eco-self-consolidating concrete (eco-SCC). Crushed demolition waste mainly of concrete had been studied as a substitute for natural sand. As well as the effect of replacing fines with crushed eggshell waste was assessed. So this present work fits in these contexts. Therefore the main objective of this study is to improve current knowledge on the behavior of studied concretes in the fresh state: slump-flow test, and hardened state: mechanical resistances in compression and in bending, as well as water absorption by capillarity test, absorption by total immersion, and porosity accessible to the water of SCCs designed from different types of waste, recycled sand, and eggshell fines. Also, the method of assessing mixes were affected by the sort of chemical attack, namely the (NaCl) attack was investigated. In light of the obtained results, it was found that the addition of eggshell fines in adequate quantity, can improve the properties of SCCs, in this study a volume of 30% was sufficient, increasing the volume added to 60% introduced an opposite effect. Using recycled sand in this study did not contribute to a significant effect on the mechanical properties of the mixtures studied, although an improvement in workability was observed.

Graphical Abstract

Highlights

  • Valorization of crushed demolition waste mainly that of concrete (recycled sand).
  • Valorization of eggshell waste.
  • Realizer an eco-self-compacting.
  • Addition of eggshell fines in adequate quantity, can improve the properties of SCCs.
  • Using recycled sand did not contribute to a significant effect on the mechanical properties of the mixtures studied.

Keywords

Main Subjects

References
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Engineering and Technology Journal
Volume 41, Issue 5
Civil Engineering
12 articles
May 2023
Page 629-641
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