Mechanical and durability performance of lightweight concrete (LWC) from colombian thermally expanded clay aggregates

Comportamiento mecánico y de durabilidad de concreto ligero (CL) con agregados de arcilla colombiana expandida térmicamente


Authors

DOI:

https://doi.org/10.22517/23447214.24726

Keywords:

Chloride penetration resistance, Colombian thermally expanded clay, Compressive strength, Concrete, Lightweight concrete (LWC), Durability, Mechanical properties

Abstract

Lightweight concrete (LWC) has become an outstanding material in the construction sector to conform non-structural and structural members into buildings. Expanded clay aggregate is a special type of lightweight aggregate formed by heating clay with little lime content, having low unit weight, high durability, and mechanical strength. Despite the massive use of the expanded clay lightweight aggregate worldwide, their use in the Colombian context is still limited. This research reports the characterization of the behavior of lightweight concrete from Colombian expanded clay aggregates. Experimental tests on fresh and hardened state (compressive strength, apparent density, and chloride migration) were carried out on lightweight concrete added Colombian expanded clay aggregate. It was found that the inclusion of up to 50% of the Colombian expanded clay aggregate causes a 15% workability decrease, 36% compressive strength decrease, 22% apparent density decrease as well as 34% decrease in the chloride migration coefficient of the lightweight concrete. In the same way, the lightweight concrete added with 50% of Colombian expanded clay aggregate meets the lightweight concrete requirements prescribed by the ACI 318 building code in terms of compressive strength, and unit weight. From the results, it is concluded that the use of Colombian expanded clay aggregate added up to 50% by weight of conventional aggregate is feasible to manufacture structural lightweight concrete.

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Author Biographies

Camilo Higuera-Flórez, Sr, Universidad Católica de Colombia

Camilo Higuera Flórez received the degree of Civil Engineering in 2012 from Universidad Nacional de Colombia, Bogotá, and Master in Structural Engineering in 2017 from Universidad Nacional de Colombia, Bogotá. He is currently professor and researcher in the Faculty of Engineering at Universidad Catolica de Colombia.

Jhon Cárdenas-Pulido, Sr, Universidad Católica de Colombia

Jhon Cárdenas-Pulido received the degree of Civil Engineering in 2013 from the Universidad Militar Nueva Granada, UMNG, Colombia, and Master in Civil Engineering (area of structures and earthquakes) in 2017 from the Universidad de los Andes, Colombia. He is currently professor and researcher in the Faculty of Engineering at Universidad Catolica de Colombia. 

Adriana Vargas-Aguilar, CPT, Escuela Militar de Cadetes General José María Córdova

CPT Adriana Vargas Aguilar is officer of the Administrative Corp of the National Army, in the rank of captain, Civil Engineer from Universidad Santo Tomas, and Specialist in Civil Engineering with emphasis on Structural Engineering from Escuela Colombiana de Ingeniería Julio Garavito. She has extensive experience in tasks related to the planning, design, execution, and management of infrastructure projects, and is empowered to carry out research work based on the formulation of hypotheses and the elaboration of analytical frameworks and application of models. 

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Published

2022-09-30

How to Cite

Higuera-Flórez, C., Cárdenas-Pulido, J., & Vargas-Aguilar, A. (2022). Mechanical and durability performance of lightweight concrete (LWC) from colombian thermally expanded clay aggregates: Comportamiento mecánico y de durabilidad de concreto ligero (CL) con agregados de arcilla colombiana expandida térmicamente . Scientia Et Technica, 27(3), 167–176. https://doi.org/10.22517/23447214.24726