Research on fire resistance of silica fume insulation mortar

Ding, Chunhui; Ke-min, Xue; Cui, Hongzhi; Xu, Ziqing; Yang, Haibin; Bao, Xiaohua; Yi, Guoxing

doi:10.1016/j.jmrt.2023.06.004

Cited by 5 publications

(2 citation statements)

References 25 publications

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“…Silicon is an on-combustible material [10][11][12], and the addition of graphite particles had a significant effect on reducing the thermal conductivity of the materials [13][14][15][16]. In order to overcome the shortcomings of organic materials in fire resistance, organic-inorganic composite materials have been developed.…”

Section: Introductionmentioning

confidence: 99%

Flexural Experiment and Design Method of Steel-Wire-Enhanced Insulation Panels

Jiang

Zhang

et al. 2023

Buildings

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A new type of non-dismantling composite insulation panel, namely a steel-wire-enhanced insulation panel, was proposed. Compared to traditional organic insulation panels, the construction procedure is reduced, and the fire resistance is improved. The flexural performance was explored experimentally and numerically to evaluate its ability to withstand lateral pressure when it was used as the formwork of a cast-in-place concrete wall. First, 6 groups of 12 specimens of steel-wire-enhanced insulation panels were conducted under 2 loading modes: 3-point bending loading and 4-point bending loading. The failure modes of these specimens included a straight crack at the bottom of the panel and the yielding of steel wire. The test results showed that the maximum bending moment of the specimens with an 80 mm thickness could reach 2.415 kN·m. Second, finite element (FE) models were developed for the steel-wire-enhanced insulation panels by ABAQUS, which were validated by the experimental results. Third, a parametric study with parameters, including the thermal insulation cover, the square gird spacing of the steel wire mesh, and the diameter of the steel wire, was performed. It was observed that the insulation cover had a significant effect on the flexural capacity in the simulated range. Finally, theoretical formulas for panel stiffness and flexural capacity were presented, which can predict the bending performance more conservatively compared to the experimental results. The research and analysis of this study could offer a valuable reference for designing this panel in practical applications.

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Section: Introductionmentioning

confidence: 99%

Flexural Experiment and Design Method of Steel-Wire-Enhanced Insulation Panels

Jiang

Zhang

et al. 2023

Buildings

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“…Koksal et al [16] discovered that using expanded vermiculite and calcium aluminate cement enables the preparation of fire-resistant mortar with excellent refractoriness at temperatures as high as 900 • C. Huang et al [17] achieved compressive strengths of 32.8% to 45.6% of the initial strength in mortar made from alkaliactivated slag-crushed aggregates during a 900 • C fire. Ding et al [18] also developed a refractory and insulating composite material using expanded perlite as the aggregate. Krivenko et al [19] successfully prepared a high-performance alkali-aluminosilicate fireproof coating, which can effectively resist fire at 1100 • C for 2 h. Wang et al [10] developed a fireproof coating with superior fire insulation capabilities, effectively preventing hightemperature bursting and spalling of concrete during a 90 min fire exposure.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Application Potential and Performance of SiO2 Aerogel Mortar in Various Tunnel High-Temperature Environments

Chen,

Zhu,

Yan

et al. 2023

Fire

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SiO2 aerogel is a super-insulating material that can be used for tunnel fireproofing to eliminate high-temperature spalling and extend the safe evacuation time of personnel. This study aimed to replace traditional aggregates with SiO2 aerogel in mortar preparation and evaluate its mechanical properties, thermal conductivity, and durability (freeze–thaw, water, and moisture resistance). Furthermore, the high-temperature characteristics of SiO2 aerogel and the damage evolution pattern of SiO2 aerogel mortar were investigated with varying fire durations (0.5, 1, 1.5, 2, 2.5, and 3 h) and fire temperatures (1000, 1100, and 1200 °C) as environmental variables. The results revealed that the critical temperature and critical time of SiO2 aerogel particles from amorphous to crystalline structures were about 1100 °C and 1.5 h, respectively. SiO2 aerogel mortar exhibited a compressive strength of 3.5 MPa, a bond strength of 0.36 MPa, and a thermal conductivity of 0.165 W/m·K. The residual mass ratio and residual compressive strength of SiO2 aerogel mortar were 81% and 1.8 MPa after 1100 °C for 2.5 h. The incorporation of SiO2 aerogel significantly improved the fire resistance of the mortar. Therefore, SiO2 aerogel mortar has the potential to be used as a fireproof coating and can be applied in tunnels to reduce high-temperature spalling and extend the safe evacuation time for personnel.

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