Open Access Open Access  Restricted Access Subscription or Fee Access

Insulating Bricks Filled with Cellulose Fibers, Packed in Recycled Plastic and Covered with Mortar Coating

(*) Corresponding author

Authors' affiliations



This article presents a new composite brick made of cellulose fibers packed in a thin, hermetically sealed plastic block made of a set of recycled PET bottles, and coated with a layer of mortar. This brick is made to provide good thermal and acoustic insulation in building walls and possibly in floor slabs. The properties of cellulose fibers, mortar, and PET plastic are presented as well as the manufacturing process used to produce the brick. The physical properties of the proposed brick have been experimentally measured through laboratory tests and they have been numerically evaluated using specific formulae or software simulation. These properties include density, compressive strength, flexural strength, thermal conductivity and sound reduction index. Two thicknesses for the brick are considered in this study: a medium one of 12.5 cm and a large one of 24 cm. Each thickness has allowed obtaining specific properties that have been assessed and compared with other bricks cited in the references. The results of the proposed medium-thickness brick show good resistance to compression, with a more ductile failure mode, as well as a low thermal conductivity and a fair predicted noise reduction index, found using the INSUL 9.0 simulation. The estimated results of the large thickness brick predict a lower yet good compressive strength, with improved insulating properties; in particular a very low thermal conductivity and a good noise reduction index. The results of both the thicknesses have been also compared to the requirements of thermal and acoustic building codes used in many countries. There are several advantages of this brick including cost optimization, sustainment of the environment, and ease of assembly in construction. These advantages have also been discussed to prove their interesting use in the construction of buildings as well as their compliance with the recommendations of thermal and acoustic building codes.
Copyright © 2020 Praise Worthy Prize - All rights reserved.


Composite Brick; Slab; Cellulose Fibers; Mortar; Recycled Plastic; Mechanical Resistance; Thermal Conductivity; Sound Reduction; Environment-Friendly

Full Text:



D. M. Sutcu, J. J. del Coz Díaz, F. P. Álvarez Rabanal, O. Gencel, et S. Akkurt, Thermal performance optimization of hollow clay bricks made up of paper waste, Energy Build., vol. 75, p. 96-108, June 2014.

K. Ramamurthy, E. K. Kunhanandan Nambiar, G. Indu Siva Ranjani, A classification of studies on properties of foam concrete Cem. Concr. Compos., vol. 31, n° 6, p. 388-396, July. 2009.

J. Wernery, A. Ben-Ishai, B. Binder, et S. Brunner, Aerobrick - An aerogel-filled insulating brick, Energy Procedia, vol. 134, p. 490-498, Oct. 2017.

J. Li, X. Meng, Y. Gao, W. Mao, T. Luo, et L. Zhang, Effect of the insulation materials filling on the thermal performance of sintered hollow bricks, Case Stud. Therm. Eng., vol. 11, p. 62-70, march 2018.

X. Wang, H. Yu, L. Li, et M. Zhao, Experimental assessment on a kind of composite wall incorporated with shape-stabilized phase change materials (SSPCMs), Energy Build., vol. 128, p. 567-574, Sept. 2016.

G. Vasconcelos et al., Proposal of an innovative solution for partition walls: Mechanical, thermal and acoustic validation, Constr. Build. Mater., vol. 48, p. 961-979, Nov. 2013.

J. C. E. Van den Wyngaert, M. Schevenels, et E. P. B. Reynders, Predicting the sound insulation of finite double-leaf walls with a flexible frame, Appl. Acoust., vol. 141, p. 93-105, Dec. 2018.

M. Abid, M.S Abbes, Acoustic Response of a Multilayer panel with viscoelastic material, International Journal of Acoustics and Vibration, Feb 2012.

M. Boumhaout, L. Boukhattem, H. Hamdi, B. Benhamou, F. Ait Nouh, Thermomechanical characterization of a bio-composite building material: Mortar reinforced with date palm fibers mesh, Constr. Build. Mater., vol. 135, p. 241-250, March 2017.

N. U. Kockal, Investigation about the effect of different fine aggregates on physical, mechanical and thermal properties of mortars, Constr. Build. Mater., vol. 124, p. 816-825, Oct. 2016.

Ibrahim, Y., Durability and Structural Performance of Recycled Aggregate Concrete: a Review, (2019) International Review of Civil Engineering (IRECE), 10 (3), pp. 135-141.

J. Meredith, R. Ebsworth, S. R. Coles, B. M. Wood, K. Kirwan, Natural fibre composite energy absorption structures, Compos. Sci. Technol., vol. 72, n° 2, p. 211-217, Jan. 2012.

V. K. Thakur, M. K. Thakur, Processing and characterization of natural cellulose fibers/thermoset polymer composites, Carbohydr. Polym., vol. 109, p. 102-117, Aug. 2014.

I. Florea, D. L. Manea, Analysis of Thermal Insulation Building Materials Based on Natural Fibers, Procedia Manuf., vol. 32, p. 230-235, 2019.

X. Tang, X. Zhang, H. Zhang, X. Zhuang, et X. Yan, Corn husk for noise reduction: Robust acoustic absorption and reduced thickness, Appl. Acoust., vol. 134, p. 60-68, May 2018.

J. Wei, C. Meyer, Degradation mechanisms of natural fiber in the matrix of cement composites, Cem. Concr. Res., vol. 73, p. 1-16, July 2015.
Moroccan Thermal Regulation of Construction, Moroccan Agency for Energy Efficiency (AMEE), 2011.

Acoustic building regulation, National noise council (CNB) France, 2017.

S. Raefat, M. Garoum, M. Souihel, et N. Laaroussi, Thermal transmittance comparison between multilayer walls made from hollow fired clay and plaster-granular cork bricks using electrical analogy, Energy Procedia, vol. 139, p. 596-601, Dec. 2017.

R. Navarro, S. Ferrándiz, J. López, et V. J. Seguí, The influence of polyethylene in the mechanical recycling of polyethylene terephtalate, J. Mater. Process. Technol., vol. 195, n° 1-3, p. 110-116, Jan. 2008.

N. U. Kockal, Investigation about the effect of different fine aggregates on physical, mechanical and thermal properties of mortars, Constr. Build. Mater., vol. 124, p. 816-825, Oct. 2016.

Bendada, A., El Hammoumi, A., Gueraoui, K., Sammouda, M., Ibenbrahim, A., Vulnerability Analysis of a School Building Under Tsunami Loading in the Gulf of Cadiz, (2017) International Review of Civil Engineering (IRECE), 8 (1), pp. 11-18.

NM. ISO 6946/2007 Building components and building elements: Thermal resistance and thermal transmittance: Calculation method.

A. M. H. Mansour, S. A. Ali, Reusing waste plastic bottles as an alternative sustainable building material, Energy Sustain. Dev., vol. 24, p. 79-85, Feb. 2015.

S. Safinia et A. Alkalbani, Use of Recycled Plastic Water Bottles in Concrete Blocks, Procedia Eng., vol. 164, p. 214-221, 2016.

Hasan, Z., Abed, M., Nasr, M., Studying the Mechanical Properties of Mortar Containing Different Waste Materials as a Partial Replacement for Aggregate, (2019) International Review of Civil Engineering (IRECE), 10 (3), pp. 155-161.

Maryoto, A., Nastain, N., Supriyanto, H., The Bond Response of Concrete Brick with Recycled Tire Chip as Partial Replacement of Aggregate Applied in the Non-Structural Masonry Wall, (2019) International Review of Civil Engineering (IRECE), 10 (1), pp. 33-40.

Hasan, Z., Nasr, M., Abed, M., Combined Effect of Silica Fume, and Glass and Ceramic Waste on Properties of High Strength Mortar Reinforced with Hybrid Fibers, (2019) International Review of Civil Engineering (IRECE), 10 (5), pp. 267-273.


  • There are currently no refbacks.

Please send any question about this web site to
Copyright © 2005-2023 Praise Worthy Prize