Mechanical behavior of low density concrete mixtures with thermally expanded clay from the metropolitan area of Cúcuta
Comportamiento mecánico de mezclas de concreto de baja densidad con arcilla expandida térmicamente del área metropolitana de
In order to develop construction materials with greater efficiency and performance than conventional materials, mixtures of lightweight concrete (LWC) made from thermally expanded clay (TEC) have been generated. In this article we study the mechanical properties (equilibrium density, compressive strength) of the LWC mixtures produced with raw material from the metropolitan area of Cúcuta, contrasting their characteristics with conventional concrete (CC) mixtures. For this, the lightweight aggregates were developed by calcining clay pellets in a rotary kiln at a pilot plant scale at a temperature of 1050 ° C, generating an expansion of 1.60 times of its initial size. Following the methodology ACI 211.2-98 two concrete mixtures were designed: the first, with fine and coarse aggregate of TEC; and the second, with coarse aggregate of TEC and fine aggregate of sand. It was determined that the LWC mixture with the highest efficiency is the one that uses fine and coarse aggregate of TEC, since the density of the LWC decreased by 25% with respect to the density of the CC, maintaining the resistance to compression after 28 days Under the same conditions. In conclusion, LWC mixtures made from TEC with raw materials from the metropolitan area of Cúcuta have a lower equilibrium density and compressive strength similar to that of CC.
ASTM C330/330M, "Standard Specification for Lightweight Aggregates for Structural Concrete," West Conshohocken, PA, US, 2014.
K. H. Yang, G. H. Kim and Y. H. Choi, "An Initial Trial Mixture Proportioning Procedure for Structural Lightweight Aggregate Concrete," Construction and Building Materials, vol. 55, pp. 431-439, 2014.
ACI Committee 213, "Guide for Structural Lightweight Aggregate Concrete (ACI 213R-03).," American Concrete Institute, Farmington Hills, MI, USA, 2003.
A. Ardakani and M. Yaasdani, "The Relation Between Particle Density and Static Elastic Moduli of Lightweight Expanded Clay Aggregates," Applied Clay Science, Vols. 93-94, pp. 28-34, 2014.
D. Rumšysa, D. Bačinskasa, E. Spudulisa and A. Meškėnasa, "Comparison of material properties of lightweight concrete with recycled polyethylene and expanded clay aggregates.," Procedia Engineering, vol. 172, pp. 937-944, 2017.
H. J. Chen, T. Yen and T. P. Lai, "A New Proportion Method of Lightweight Aggregate Concrete Based on Dividing Strength," Holand et al. International Symposium for Structural Lightweight Aggregate Concrete, vol. 20, no. 4, pp. 463-71, 1995.
S. Chandra and L. Berntsson, "Lightweight Aggregate Concrete," Science, Technology and Applications, USA, Noyes Publications, 2003.
J. A. Bogas and A. Gomes, "A Simple Mix Design Mthod for Structural Lightweigt Aggregate," Materials and Structures, vol. 46, p. 1919, 2013.
ACI Committee 211, "Standard Practice for Selecting Proportions for Structural Lightweight (ACI 211.2-98).," American Concrete Institute, 1998.
H. Z. Cu, Y. L. Tommy, M. S. A. and X. Weiting, "Effect of Lightweight Aggregates on the Mechanical Properties and Brittleness of Lightweight Aggregates Concrete," Construction and Building Materials, vol. 35, pp. 149-158, 2012.
C. C. Yang and R. Huang, "Approximate Strength of Lightweight Aggregates Using Micromechanics Method," Advn. Cem. Bas. Mat., vol. 17, pp. 133-138, 1998.
J. A. Bogas and A. Gomes, "Compressive behavior and failure modes of structural lightweight aggregate concrete – characterization and strength prediction," Materials and Design, vol. 46, p. 832–841., 2013.
A. Gerritse, "Design Considerations for Reinforced Lightweight Concrete," The International Journal of Cement Composites and Lightweight Concrete, vol. 3, no. 1, pp. 57-69, 1981.
ACI Committee 211, "Standard Practice for Selecting Proportions for Normal Heavyweight, and Mass Concrete (ACI 211.1-91)," American Concrete Institute, 1997.
G. Cougny, "Spécifications sur les matières premières argileuses pour la fabrication de granulats légers expansés," Bull. Int. Assoc. Eng. Geol, vol. 41, pp. 47-55, 1990.
P. W. Berg, "Investigation of Leca-clay by the Technical University of Denmark," Leca Internal, vol. 230, p. 33, 1970.
ASTM C567-00, "Standard Test Method for Determining Dendity of Structural Lightweught Concrete," West Conshohochen, PA 19428-2959, US.
ASTM C 39 / 39 M, "Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens," West Conshohocken, PA, 19428-2959, US.
R:, "A Languagee and Environment for Statistical Computing.," Core Team, R. Vienna, Austria: R Foundation for Statistical Computing, 2017.
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