Application analysis and environmental impact of straw reinforced gypsum plaster for improving the energy efficiency in buildings in the six climate zones of Morocco

hammouti, Aboubakr El; Charai, Mouatassim; Channouf, Salaheddine; Horma, Othmane; Mezrhab, Ahmed; Karkri, Mustapha; Tankari, Mahamadou Abdou

doi:10.1016/j.jobe.2023.106829

Cited by 5 publications

(3 citation statements)

References 30 publications

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“…Natural gypsum powder from the rocks of the Safi region (Morocco) was used to assemble the samples. Its features were deeply discussed in [17,34]. The powder (p) was mixed with water (w) (mass ratio w/p equal to 0.8) in about 90 s, in order to obtain a fluid and homogenous porous plaster without any air bubbles.…”

Section: Methodsmentioning

confidence: 99%

“…Wood waste improved the thermo-acoustic properties of gypsum composites [33]. Straw is one of the most used additives; when only 4 wt.% is added to the gypsum plaster, reductions in thermal conductivity and in greenhouse gas emissions up to, respectively, 68% and 13% were achieved in different climate zones of Morocco [34]. However, all these additives resulted in a deterioration of the mechanical performance.…”

Section: Introductionmentioning

confidence: 99%

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Thermal and Acoustic Performance of Gypsum Plasters Mixed with Different Additives: Influence of Bio-Based, Synthetic, and Mineral Fillers

Merli,

Bouzit,

Taha

et al. 2023

Applied Sciences

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Due to the high impact of the building sector on the environment, a growing interest focuses on insulating materials able to ensure good thermo-acoustic performance for the building envelope from a sustainable and circular economy perspective. In this context, Moroccan natural gypsum was mixed with local natural waste materials. The thermal and acoustic properties of the samples were measured; they were compared to those of synthetic- and mineral-based gypsum plasters manufactured with the same technique. A Small Hot Box apparatus was used for thermal characterization, whereas acoustic performance was investigated by means of a Kundt’s Tube. Natural and synthetic additives result in a reduction in density and an improvement in thermal performance. Conductivity values in the 0.181–0.238 W/mK range were obtained, depending on the type of natural additive, with respect to 0.275–0.323 W/mK of mineral-based gypsum plasters. The acoustic measurements showed that all the composites have similar performance in terms of acoustic absorption, whereas high transmission loss values were obtained for the natural additives (TL = 35–59 dB). Petiol of Palm and Stipa Tenacissima were found to be materials able to improve both thermal and acoustic properties.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal and Acoustic Performance of Gypsum Plasters Mixed with Different Additives: Influence of Bio-Based, Synthetic, and Mineral Fillers

Merli,

Bouzit,

Taha

et al. 2023

Applied Sciences

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show abstract

“…Studies in Morocco have shown that the use of 4% by weight of straw in plasters will reduce their thermal conductivity by 68%. Energy simulations conducted in six climate zones in Morocco using the "Type56a" module of the TRNSYS software concluded that implementing the proposed solution could lead to a 13% reduction in greenhouse gas emissions from buildings, and annual costs could be reduced by about 13% in all climate zones in Morocco 21 . Studies were also conducted for the addition of Pennisetum Setaceum (PS) fibers and their effect on the thermomechanical properties of adobe clay was determined.…”

mentioning

confidence: 99%

Basic research on layered geopolymer composites with insulating materials of natural origin

Bąk,

Mikuła,

Oliinyk

et al. 2024

Sci Rep

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New restrictions on carbon dioxide emissions and electricity consumption are currently being introduced around the world. Innovative solutions are being adopted in many countries to reduce CO2 emissions and material and energy consumption. The present work is related to the study of innovative binders based on geopolymers for the production of layered building envelopes. The binders are reinforced with composite bars and containing fibers of natural origin. The natural materials used to produce the samples are completely biodegradable. A 10-mol sodium hydroxide solution with an aqueous solution of sodium silicate was used for alkaline activation of geopolymers. The purpose of the study was to compare and determine the insulating properties of natural fiber-based materials such as coconut mat, jute felt, hemp felt, flax felt, flax wool, hemp wool, flax-jute wool, and to determine the effect of these materials on geopolymer composites, in which 4 layers of natural insulating materials were used, and the composites were reinforced by fiberglass bars. The publication presents the results of physicochemical studies of geopolymerization precursors and natural insulating materials, studies of thermal properties of fibers, mats, felts and wools, morphology of fiber structure and texture, as well as physical and thermal properties of finished multi-layer partitions. The results indicate the great potential of these materials in prefabrication and structural-insulation applications. The fabricated composites using 4 layers of natural fibers showed improved thermal conductivity by as much as 40% (reduced thermal conductivity from 1.36 W/m × K to about 0.8 W/m × K). The work may have future applications in energy-saving and low-carbon construction.

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Spent ion-exchange resin as a new aggregate to enhance specific heat capacity of composite building materials: A case study on gypsum plaster

Channouf,

Charai,

El Hammouti

et al. 2024

Construction and Building Materials

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Application analysis and environmental impact of straw reinforced gypsum plaster for improving the energy efficiency in buildings in the six climate zones of Morocco

Cited by 5 publications

References 30 publications

Thermal and Acoustic Performance of Gypsum Plasters Mixed with Different Additives: Influence of Bio-Based, Synthetic, and Mineral Fillers

Thermal and Acoustic Performance of Gypsum Plasters Mixed with Different Additives: Influence of Bio-Based, Synthetic, and Mineral Fillers

Basic research on layered geopolymer composites with insulating materials of natural origin

Spent ion-exchange resin as a new aggregate to enhance specific heat capacity of composite building materials: A case study on gypsum plaster

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