Experimental study on improving the properties of rock wool and glass wool by silica aerogel

Yan, Qiuhui; Meng, Zeyu; Luo, Jieren; Wu, Zhiju

doi:10.1016/j.enbuild.2021.111146

Cited by 19 publications

(5 citation statements)

References 42 publications

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“…At present, commonly used insulation materials include polyurethane [24], glass wool [25], and expanded perlite [26]. As a kind of polymer compound, polyurethane is widely used in external insulation composite systems because of its good stability, chemical resistance, thermal insulation and resilience [27].…”

Section: Introductionmentioning

confidence: 99%

Temperature and strain characteristics of ceramic-reinforced polyurethane insulation decorative board under artificial accelerated aging conditions

Ma,

Yuan,

Xiong

et al. 2024

Mater. Res. Express

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As a new type of thermal insulation material, ceramic-reinforced polyurethane insulation decorative board (IDB) has been applied to a certain extent, but changes in the temperature and strain between this material and the substrate wall during the aging process remain unclear. In this study, an external insulation composite system with ceramic-reinforced polyurethane IDB was subjected to 60 heat-rain cycles, and the temperature and strain at the interface between the IDB and the substrate wall were measured. The results show that the ceramic-reinforced polyurethane IDB had good thermal insulation performance and durability, while the horizontal and vertical strains exhibited serious inhomogeneity, which may be an important reason for the aging and cracking of the IDB. The characteristics of temperature and strain at the interface between the IDB and the substrate wall provide a reference for analyzing the synergistic effect and the disassembly of the two and can provide some guidance for the design and construction of external insulation composite systems.

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Section: Introductionmentioning

confidence: 99%

Temperature and strain characteristics of ceramic-reinforced polyurethane insulation decorative board under artificial accelerated aging conditions

Ma,

Yuan,

Xiong

et al. 2024

Mater. Res. Express

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“…However, although AICs have shown great potential in the eld of architecture, their durability in practical applications is still a concern [21,22]. Durability is directly related to the service life and maintenance cost of materials, which is very important to ensure the long-term safety and performance of buildings [23].…”

Section: Introductionmentioning

confidence: 99%

Insight into pore size distribution and moisture migration behavior in aerogel cementitious composites using BET-MIP and LF-NMR methods

Yang,

Huang,

Feng

et al. 2024

Preprint

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The durability of cementitious composites is closely related to their internal pore distribution and moisture migration patterns. In this study, low-field nuclear magnetic resonance (LF-NMR), specific surface area and porosity test (BET) and mercury intrusion porosimetry (MIP) techniques were used to compare and analyze the effects of different SiO2 aerogel contents on the pore size distribution, pore water content distribution and internal water transport of Silica aerogel incorporated Cementitious composites (AICs). The results show that with the increase of aerogel content, the pore structure of AICs has changed, and the pore connectivity has been enhanced. Compared with AIC0, the porosity of AIC10 increased by 11.89%. BET-MIP combined characterization method and LF-NMR method showed consistency in analyzing the change trend of pore size distribution of AICs, showing a trend of increasing the proportion of macroporous pore volume, thereby accelerating the water transport rate and reducing the durability of the material. In addition, during the water absorption process, the water distribution inside the material is uneven, and the area with low water content shows a cold tone in the spatial imaging.

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“…Research has shown that a mere 20 mm of aerogel can reduce heat loss through building exterior walls by up to 90% [11,12]. Yan et al conducted a study on the use of silica aerogel to improve the performance of rock wool and glass wool and the preparation of silica aerogel and composite insulation with expanded perlite for building insulation [13,14]. To further enhance the thermal insulation properties of concrete, S. Fickler incorporated silica aerogel particles into a highstrength cement matrix, resulting in high-performance aerogel concrete with a compressive strength ranging from 3.0 MPa to 23.6 MPa and a thermal conductivity ranging from 0.16 W/m/K to 0.37 W/m/K [15].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Water Resistance in Foam Cement through MTES-Based Aerogel Impregnation

Li,

Yao,

Wang

et al. 2024

Gels

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The propensity of foamed concrete to absorb water results in a consequential degradation of its performance attributes. Addressing this issue, the integration of aerogels presents a viable solution; however, their direct incorporation has been observed to compromise mechanical properties, attributable to the effects of the interface transition zone. This study explores the incorporation of MTES-based aerogels into foamed cement via an impregnation technique, examining variations in water–cement ratios. A comprehensive analysis was conducted, evaluating the influences of MTES-based aerogels on the thermal conductivity, compressive strength, density, chemical composition, and microstructure of the resultant composites across different water–cement ratios. Our findings elucidate that an increment in the water–cement ratio engenders a gradual regularization of the pore structure in foamed concrete, culminating in augmented porosity and diminished density. Notably, aerogel-enhanced foamed concrete (AEFC) exhibited a significant reduction in water absorption, quantified at 86% lower than its conventional foamed concrete (FC) counterpart. Furthermore, the softening coefficient of AEFC was observed to surpass 0.75, with peak values reaching approximately 0.9. These results substantiate that the impregnation of MTES-based aerogels into cementitious materials not only circumvents the decline in strength but also bolsters their hydrophobicity and water resistance, indirectly enhancing the serviceability and longevity of foamed concrete. In light of these findings, the impregnation method manifests promising potential for broadening the applications of aerogels in cement-based materials.

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Experimental study on improving the properties of rock wool and glass wool by silica aerogel

Cited by 19 publications

References 42 publications

Temperature and strain characteristics of ceramic-reinforced polyurethane insulation decorative board under artificial accelerated aging conditions

Temperature and strain characteristics of ceramic-reinforced polyurethane insulation decorative board under artificial accelerated aging conditions

Insight into pore size distribution and moisture migration behavior in aerogel cementitious composites using BET-MIP and LF-NMR methods

Enhancing Water Resistance in Foam Cement through MTES-Based Aerogel Impregnation

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