Abstract

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Author(s):: DU Qiang; WEI Jing; LU Jing; WANG Ning; (School of Civil Engineering, Chang’an University, Xi’an 710061, Shaanxi, China)

Keywords:: civil engineering; SIPs; rock wool; mechanical property; experimental study

Abstract:: In order to investigate the mechanical properties of rock wool cored structural insulated panels (SIPs) and the effect of various thicknesses on its mechanical properties, this paper conducted the tensile, compressive and double shear tests on three different thickness SIPs respectively by taking oriented strand board (OSB) as face plate. The mechanical strength and corresponding stress-strain curves were obtained in this study and failure mode were analyzed. The results show that the strength decreases gradually after cracking under tension and shear load until the failure of specimens. In compressive test, the obvious compression deformation can be observed with the load increasing, and springback occurs after unloading at the deformation degree by 50%. The increase of thickness leads to the reduction of tensile and shear strength. Meanwhile, the marginal effect diminishes. When the thickness increases from 50 mm to 60 mm, the tensile and shear strength decrease by 0.8 kPa and 14.46 kPa, respectively. When the thickness is enhanced from 60 mm to 150mm, the tensile and shear strength reduce by 1.63 kPa and 7.1 kPa, respectively. The compressive strength climbs up first and declines afterwards with the thickness increasing. Rock wool cored SIPs system can be considered in engineering application for its load-bearing ability according to the structural requirements and its advantageous performance on fire resistance and durability.