Effects of microstructure on acoustical insulation of gypsum boards

Elkhessaimi, Yassine; Tessier-Doyen, Nicolas; Smith, Agnès

doi:10.1016/j.jobe.2017.09.011

Cited by 16 publications

(4 citation statements)

References 22 publications

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“…It should also be noticed that specimens used for this analysis were obtained by cutting from the thermally treated specimens, i.e. removing the superficial vitreous layer (resulted due to "self glazing effect"); this processing increases the surface of specimens in contact with the sound wave (due to the high number of pores exposed at the surface) which is an important factor in the sound mitigation (35,36).…”

Section: Resultsmentioning

confidence: 99%

Alkali activated materials based on glass waste and slag for thermal and acoustic insulation

et al. 2019

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Porous alkali activated materials (AAM), can be obtained from waste glass powder and slag mixtures by alkali activation with NaOH solution. To obtain an adequate porous microstructure, the hardened AAM pastes were thermally treated at temperatures ranging between 900°C and 1000°C, for 60 or 30 minutes. Due to the intumescent behaviour specific for this type of materials, an important increase of the volume and porosity occurs during the thermal treatment. The partial substitution of waste glass powder with slag, determines the increase of compressive strength assessed before (up to 37 MPa) and after (around 10 MPa) thermal treatment; the increase of slag dosage also determines the increase of the activation temperature of the intumescent process (above 950°C). The high porosity and the specific microstructure (closed pores with various shapes and sizes) of these materials recommend them to be utilised as thermal and acoustical insulation materials.

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Section: Resultsmentioning

confidence: 99%

Alkali activated materials based on glass waste and slag for thermal and acoustic insulation

et al. 2019

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“…When staggered wood studs were connected to the CLT, the sound bridge in the wall (W6) was weakened due to the greater separation of partial wood studs from each other, resulting in an increased weighted sound reduction index of 9 dB compared to that of W3. Another reason for the improvement of the sound insulation of sheathed CLT walls the increased total thickness and surface density of the wall (Elkhessaimi et al, 2017;Bradley and Birta, 2001a). The sound insulation of W5 was 14.9 dB at the frequency of 100 Hz, lower than those of other walls, due to the wood stud connection that generated sound bridges (Min et al, 2022).…”

Section: Clt Composite Wallsmentioning

confidence: 99%

“…This is because the overhang of half of the wood studs generated an air layer in the middle of the wall, changing the original resonance system and forming a new mass-air-mass resonance system in the low-frequency range to reduce sound insulation (Bradley and Birta, 2001b). The decrease of the sound reduction index at the frequency of 315 Hz is related to the critical frequency of GB (Elkhessaimi et al, 2017). Although the sound insulation of W6 was negatively affected by mass-air-mass resonance in the low-frequency range, it was better than that of W5.…”

Section: Clt Composite Wallsmentioning

confidence: 99%

Improvement in Airborne Sound Insulation of Cross-Laminated Timber (Clt) Walls

Yue

Cheng

Zhang

et al. 2023

Preprint

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“…Gypsum has been known as a binder with good technical properties which has led to its widespread use [18]. It is very important to the construction industry because of its low density, its ability to control humidity and heat, its excellent performance in protection against fire, and its low cost [19]. The gypsum is widely used as a bonding material, interior partitions, ceiling tiles and interior wall cladding [20].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Thermo-Physical Properties of Gypsum Composites Using Olive Pomace Waste Reinforcement

Atigui,

Maaloufa,

Souidi

et al. 2024

RCMA

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Today, the construction sector consumes 30-40% of the world's total energy and contributes one-third of total greenhouse gas emissions. Consequently, the development of new eco-friendly building materials with improved properties is becoming increasingly important. Olive pomace waste is released into the environment, which has a negative impact on it. Recycling this olive pomace waste as an alternative raw material in the construction industry can protect the environment and at the same time reduce the additional costs of managing and disposing of this waste for local authorities. It is an environmentally friendly and sustainable solution to waste recycling. This study investigated the effect of adding olive pomace (OP) to building materials. Four proportions of this additive (4%, 8%, 12% and 16%) were used. Physical, thermal properties (conductivity and diffusivity) as well as mechanical properties (compressive and flexural strength) of the composites were carried out. The traditional gypsum-based composites had a thermal conductivity of 0.478 W.m -1 .K -1 , while the composites of gypsum with additive show an interesting thermal conductivity of 0.390 W.m -1 .K -1 for a percentage of 16% (OP16) with a reduction rate of 22.56%, and mechanical properties lower than those of the reference gypsum-based composite but in accordance with the standard EN 133279-1, with compressive strength of almost 4.10MPa for a percentage of 16% (OP16), and flexural strength equal to 2MPa. This is due to the increase in porosity as indicated by the microstructure of the composites. We also tested water absorption by capillary action for each specimen, and found that this coefficient increased with increasing percentage of waste.

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Effects of microstructure on acoustical insulation of gypsum boards

Cited by 16 publications

References 22 publications

Alkali activated materials based on glass waste and slag for thermal and acoustic insulation

Alkali activated materials based on glass waste and slag for thermal and acoustic insulation

Improvement in Airborne Sound Insulation of Cross-Laminated Timber (Clt) Walls

Enhanced Thermo-Physical Properties of Gypsum Composites Using Olive Pomace Waste Reinforcement

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