Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Evaluation of characteristics and preference of mortar samples with aluminum slag and LECA with internal curing

Document Type : Original Article

Authors
Mohammad Ali Dastan Diznab 1
Setareh Ghaderan 2
Fatemeh Yousefi 2
Mehran Bonyadi 3
1 Assistant Professor of Civil Engineering Department, Technical and Engineering Faculty, Arak University, Arak, Iran
2 Master's student in civil engineering, Technical and Engineering Faculty, Arak University, Arak, Iran
3 Master of Civil Engineering, Technical and Engineering Faculty, Arak University, Arak, Iran
10.22065/jsce.2024.475100.3507
Abstract
This article examines the effects of using LECA (Light Expanded Clay Aggregate) and aluminum slag on the mechanical properties of mortar samples. Internal curing using LECA grains was also performed on the mortar samples. Aluminum slag is an environmental pollutant produced as waste during the aluminum production process. Using these materials in cement mortars can significantly improve the environment but reduces the mechanical properties of the mortar. On the other hand, LECA grains along with internal curing can improve the behavioral properties of the mortar. This study investigates the impact of using different percentages of LECA and aluminum slag on properties such as compressive and flexural strength. The results show that in samples containing LECA and slag, the highest compressive strength was achieved with 15% LECA and 5% slag, and the highest flexural strength was achieved with 5% LECA and 10% slag in the mortar. Conversely, the presence of 5% LECA and 10% slag in the mortar sample caused a significant reduction in compressive strength by about 40.7%, and the presence of 10% LECA and 5% slag in the mortar sample reduced the flexural strength by up to 37%. Finally, to introduce an optimal mix design, a model was proposed to introduce a desirability index based on the variables of the amount of aluminum slag and LECA used, compressive and flexural strength, and the behavior of different mortar mix designs was evaluated.
Keywords
Aluminum slag
LECA
compressive strength of cement mortar
flexural strength of cement mortar
Preference

Subjects

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  • Receive Date 24 September 2024
  • Revise Date 01 December 2024
  • Accept Date 04 December 2024