Engineering Performance of Polyurethane Bonded Aggregates

Wu, Haimin; Shu, Yiming; Liu, Yunfeng

doi:10.5755/j01.ms.23.2.15798

Cited by 2 publications

(3 citation statements)

References 6 publications

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“…The cushion was filled and rolled to a thickness of 6 cm by mixing basalt gravel (particle size of 5-20 mm) with Polyurethane glue using a 1.5% glue to bone ratio. The polyurethane bonded aggregate is a type of elastic material with an elastic modulus of 0.81 GPa [7]. The protective layer of concrete with a compressive strength of 30 MPa was prefabricated with formwork.…”

Section: Test Materials and Manufacturing Processmentioning

confidence: 99%

“…Polyurethane bonded aggregates have stronger deformation adaptability than traditional materials such as porous concrete. Thus, they are well suited as a cushion material for the geomembrane surface barrier of a high rockfill dam [7]. However, there has not been any reported research on the mechanical and deformation performance of a geomembrane surface barrier comprised of polyurethane bonded aggregates as the cushion material.…”

Section: Introductionmentioning

confidence: 99%

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Model Test on Mechanical and Deformation Property of a Geomembrane Surface Barrier for a High Rockfill Dam

Feng

Zhaoming³

et al. 2021

Applied Sciences

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The cushion of a geomembrane surface barrier of a high rockfill dam built on deep overburden is prone to crack and fail because of excessive flexural deformation. This study proposes a geomembrane surface barrier for a high rockfill dam on deep overburden. The proposed geomembrane surface barrier uses polyurethane bonded aggregates as the cushion material. The loading and deformation performance of the barrier system under uniform water pressure was investigated using a self-developed structure model test device. The mechanical and deformation property of each layer of the barrier, and the interaction mode between adjacent layers, were obtained through external videos and internal sensor monitoring. The results demonstrated that the polyurethane bonded aggregate cushion exhibited good adaptability to flexural deformation during the entire loading process and maintained good contact and coordinate deformation with the upper protective and the lower transition layers. The geomembrane surface barrier created using polyurethane bonded aggregates as the cushion material can adapt to the flexural deformation of a high rockfill dam surface on deep overburden.

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Section: Test Materials and Manufacturing Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Model Test on Mechanical and Deformation Property of a Geomembrane Surface Barrier for a High Rockfill Dam

Feng

Zhaoming³

et al. 2021

Applied Sciences

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“…Rigid polyurethane (PUR) foam is one of the most popular products among polymeric foams used for biomedical applications [ 1 , 2 , 3 ]. PUR is a thermoset produced by polyaddition polymerization of diisocyanates and polyols [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Measurements of Mechanical Properties of PUR Foam Used for Testing Medical Devices and Instruments Depending on Temperature, Density and Strain Rate

et al. 2020

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Rigid polyurethane (PUR) foam is products used as a biomedical material for medical device testing. Thermal stability is a very important parameter for evaluating the feasibility of use for testing surgical instrument load during drilling. This work aimed to perform experimental measurements to determine the dependence of the mechanical properties of a certified PUR on temperature, strain rate and density. Experimental measurements were realised for three types of the PUR samples with different density 10, 25 and 40 pounds per cubic foot. The samples were characterised in terms of their mechanical properties evaluated from tensile and compression tests at temperatures of 25 °C, 90 °C and 155 °C. Furthermore, the structures of the samples were characterised using optical microscope, their thermal properties were characterised by thermogravimetric analysis, and their density and stiffness with the effect of temperature was monitored. The results show that it is optimal not only for mechanical testing but also for testing surgical instruments that generate heat during machining. On the basis of experimental measurements and evaluations of the obtained values, the tested materials are suitable for mechanical testing of medical devices. At the same time, this material is also suitable for testing surgical instruments that generate heat during machining.

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Engineering Performance of Polyurethane Bonded Aggregates

Cited by 2 publications

References 6 publications

Model Test on Mechanical and Deformation Property of a Geomembrane Surface Barrier for a High Rockfill Dam

Model Test on Mechanical and Deformation Property of a Geomembrane Surface Barrier for a High Rockfill Dam

Experimental Measurements of Mechanical Properties of PUR Foam Used for Testing Medical Devices and Instruments Depending on Temperature, Density and Strain Rate

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