Structural Behavior of Durable Composite Sandwich Panels with High Performance Expanded Polystyrene Concrete

Lee, Jihyung; Kang, Sung-Hoon; Ha, Yu-jin; Hong, Seong Hyeon

doi:10.1186/s40069-018-0255-6

Cited by 32 publications

(21 citation statements)

References 22 publications

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“…The choice of core material depends on the type of application and the distinct target parameters. Every core has its own unique chemical, physical and mechanical features that can be considered for a specific design purpose . Along with weight and cost, strength, stiffness and energy absorption are usually the most demanding properties in the design of a sandwich structure .…”

Section: Sandwich Structuresmentioning

confidence: 99%

A review on recent advances in sandwich structures based on polyurethane foam cores

et al. 2020

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Sandwich composites with a polyurethane foam (PUF) core have become a versatile set of materials with applications ranging from basic construction elements to advanced engineering materials. This diverse range of applications has provided these sandwich materials with a distinctive position in today's engineering world. This review focuses on the broad research that has been carried out on PUF core‐based sandwich composites over the years—especially in the last decade. Thorough details have been presented focusing on basic PUF core sandwich structures, advanced PUF core sandwich composites with different kinds of reinforcements and complex structures such as hybrid sandwich panels. All the research presented here has been categorized carefully, such as the types of materials used in various studies, the types of reinforcements and testing techniques used, including mechanical, electrical, dynamic, thermal and acoustic methods etc. Comparisons have also been made based on similar materials, similar testing procedures and similar application areas. Research areas have been highlighted by giving a deep insight into the most promising research, manufacturing techniques and improvement procedures. Major consumption areas and application sectors for PUF core sandwich composites have also been discussed in this review. Finally, conclusions have been made based on the results found from a literature investigation.

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Section: Sandwich Structuresmentioning

confidence: 99%

A review on recent advances in sandwich structures based on polyurethane foam cores

et al. 2020

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“…The common typical cross section of structural precast sandwich panel (SPSP) consists of two face wythes of concrete separated by core wythe that almost consists of heat insulation material [1]. Various parameters control the structural behaviour and the overall ultimate capacity of structural precast sandwich panels such as the grade of concrete in concrete face wythes, thickness of concrete face wythes, distribution of shear connectors, rigidity of core material, and bond between core-concrete interfaces [1,2]. It was found that shear flow capacity tends to decrease with the increase of core wythe [1].…”

Section: Introductionmentioning

confidence: 99%

“…Previously, ultra-high performance concrete was successfully the production of face wythes of SPSP with the core material of high performance expanded polystyrene. The panels were classified as light weighted high-strength structural sandwich panel [2]. The relative light weight comparing to high strength is playing the main role which controls the performance of SPSP [2,4].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Changing Properties of Wythes in Precast Structural Sandwich Panels

et al. 2020

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This study investigates the effects of changing in the properties of face and core wythes in structural sandwich panels (with dimensions of 500 500 mm and 120 mm total height). Concrete face wythes of three grades (80, 70, 37) MPa, thicknesses of (25, 35, and 45) mm, and three types of core materials (high density foam, polyethylene foam, and palm bark) were used in the production of panels. Steel shear connectors were installed in the panels with angle of 45º. Three-point bending load test was carried out on all panels and results were compared with both of the theoretical extremes capacities of non- composite and fully-composite states and ANSYS software results. The degree of composite action (%) and the (strength/weight) ratio were the main parameters that judged the specimens. It was found that upgrading concrete increased overall strength of slabs especially in high strength concrete (80 MPa), however the use of lightweight concrete (70 MPa) caused high (strength/weight) ratio due to very lightweight. Results revealed that decreasing thickness of concrete face wythes had a positive effect on strength/weight ratio (although the ultimate loads decreased) that enhanced the performance of panels as lightweight structural panels. The optimum face wythe thickness is that of 2.5 cm and has high (strength/weight) ratio. It was noticed that adding polyethylene foam as a core material results in positive effect and high (strength/weight) ratio. Results revealed that high strength concrete (80 MPa) and light-weight concrete (37 MPa) are very successful in the production face wythes of precast light-weight sandwich panels that can obtain high (strength/weight) ratio and high percent of composite action.

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“…Now, almost all commercial EPS beads are produced by suspension polymerization . Therefore, halogen‐free flame‐retardant EPS beads prepared by suspension polymerization can be popularized on a large scale without changing the existing production process . Many researchers have investigated this topic.…”

Section: Introductionmentioning

confidence: 99%

Preparation of halogen‐free flame‐retardant expandable polystyrene foam by suspension polymerization

Yuan

Wang

Bai

2019

J of Applied Polymer Sci

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In this research, using hexaphenoxycyclotriphosphazene (HPCTP) as the halogen-free flame retardant, we prepared flameretardant expandable polystyrene (EPS) beads by suspension polymerization. The effects of process parameters and the amount of flame retardant on polystyrene (PS)/HPCTP composite beads were investigated. The results show that the change in HPCTP content has little effect on the particle size distribution of composite beads. When the oil-water ratio is 1/4, TCP dosage is 3 wt %, stirring rate is 350 rpm, initiator dosage is 1.25 wt %, and HPCTP dosage is 15 wt %, the size of the composite beads is uniform, and the average particle size is 1.12 mm. HPCTP formed nanodispersed particles in the PS matrix with an average particle size of 44.86 nm. In addition, the thermogravimetric behavior and heat-release properties of composite beads were evaluated. The results showed that HPCTP mainly acted in the gaseous phase, which can effectively decrease the maximum mass-loss rate of the PS/HPTCP composite beads and significantly reduce the heat-release rate and heat-release capacity. The EPS foams were obtained by a prefoaming method. The average cell diameter was 62.15 μm, and the foaming ratio was 11 times.

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Structural Behavior of Durable Composite Sandwich Panels with High Performance Expanded Polystyrene Concrete

Cited by 32 publications

References 22 publications

A review on recent advances in sandwich structures based on polyurethane foam cores

A review on recent advances in sandwich structures based on polyurethane foam cores

Effect of Changing Properties of Wythes in Precast Structural Sandwich Panels

Preparation of halogen‐free flame‐retardant expandable polystyrene foam by suspension polymerization

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