Ultrasonic properties of polystyrene‐based composites

Oral, İmran; Güzel, Hatice; Ahmetli, Gülnare

doi:10.1002/app.34926

Cited by 9 publications

(7 citation statements)

References 65 publications

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“…The Young's modulus for EPS geofoam was compared with steel, timber, glass, concrete, and solid polystyrene (Beer, Johnston, & DeWolf, 2006). The Young's modulus value for solid polystyrene was again verified with other reference (Oral, Guzel, & Ahmelti, 2012). Three EPS geofoam blocks (16, 32, and 48 Kg/m 3 ) that have a high Young's modulus value from the V -Meter testing program are compared below in Table 6-2.…”

Section: Comparison Of Modulus With Other Materialssupporting

confidence: 53%

Non Destructive Testing for EPS Geofoam Quality Assurance

Temesgen

Andrews

Negussey

2018

5th International Conference on Geofoam Blocks in Construction Applications

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Expanded Polystyrene (EPS) geofoam is a compressible lightweight fill material. The quality of the EPS geofoam supplied must be inspected thoroughly before its placement in a project site. A review of the quality assurance measures put forward by different construction authorities around the globe was performed. It was found that the quality measures cited by these authorities are not representative of actual full sized EPS geofoam block properties.Hence, these measures have room for more revision and improvement for an effective and efficient quality assurance measure both at the EPS geofoam production plant and on the project site. Moreover, a comparison of case studies showed that in the absence of a strict quality assurance measure, uneven settlements had occurred in road way constructed over EPS geofoam which eventually led to the removal and replacement of the entire EPS geofoam fill.Non Destructive Testing, specifically P waves, were used to check the mechanical properties of EPS geofoam blocks of different densities which were produced at four different EPS production plants. The relationship between P wave velocities were checked against the different EPS densities tested. Additional relationships were examined between P wave velocities through a virgin EPS geofoam block (without any regrind/recycled content) and another EPS block of the same density which had a specific percentage of regrind/recycled content. The effect of using a signal amplifier on EPS virgin blocks and blocks containing regrind was studied. Excessively high P wave velocity variations within an EPS geofoam block was tied to the use of EPS resin beads that were not recommended for that density of geofoam. Pentane loss and the use of a resin bead type with non-uniform sizes are also believed to have caused additional variations in the P wave velocity of the blocks. EPS geofoam blocks with regrind content transmitted slower velocity and lower amplitude P waves than their virgin counterparts for the same density. Furthermore, information provided from prior large scale tests performed on EPS geofoam were found to agree with the Young's modulus values obtained by using the P wave velocities. Finally, the use of P wave velocity as a quality assurance measure on an EPS geofoam block is found to be effective and practical and is recommended to be incorporated in the various construction quality standards that pertain to EPS geofoam blocks.

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Section: Comparison Of Modulus With Other Materialssupporting

confidence: 53%

Non Destructive Testing for EPS Geofoam Quality Assurance

Temesgen

Andrews

Negussey

2018

5th International Conference on Geofoam Blocks in Construction Applications

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“…In the related litarature, marble waste was mostly used as filler in concrete or cement. However, many researchers have investigated polymer based composites by ultrasonic methods , the studies used marble waste to improve ER properties are limited . To date, there has not been any research which used different coagulants to obtain MWP composites and also there has not been any studies where ultrasonic methods are used to determine elastic properties of ER/MWP composites.…”

Section: Discussionmentioning

confidence: 99%

Ultrasonic properties of epoxy resin/marble waste powder composites

Oral

2014

Polymer Composites

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Non‐destructive techniques are suitable alternatives for characterization of composites. The aim of this study is to analyze the composites of epoxy resin (ER)/marble waste powder (MWP) by ultrasonic method. The effects of marble powder, coagulant type, and dosage on the ultrasonic properties of ER/MWP composites were investigated. The ultrasonic wave velocities of composites were measured with the pulse–echo method at room temperature by a flaw detector. The values of the acoustic impedance, Poisson's ratio, and elastic constants of the samples were calculated by the measured values of the densities and both longitudinal and shear ultrasonic wave velocities. According to the results, the ER/MWP composite using sepiolite coagulant in dosages of 4 g/500 mL has showed the highest values of elastic constants. POLYM. COMPOS. 36:584–590, 2015. © 2014 Society of Plastics Engineers

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“…Thus, ultrasonic treatment is widely used in chemical synthesis, depolymerization, extraction, food engineering, materials processing, etc. [20][21][22][23][24][25][26][27][28][29]. The cavitation and agitation action in the liquid induced by ultrasound improve the adsorption, diffusion, and wetting of resin on the surface of carbon fibers, enhance the mechanical properties, and finally use fully the outstanding property of CFRP composites [30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 98%

Effect of on-line ultrasonic treatment on the properties of carbon fiber reinforced plastic composites

Liu

Huang

2016

Res Chem Intermed

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The strength, performance, and application of carbon fiber reinforced plastic (CFRP) composites are directly affected by the interfacial bonding between fiber and resin. Wet winding technology is a commonly used composite productive process, and improving interfacial bonding of composites by on-line treatment has always been the focus of attention. In this paper, an on-line ultrasonic treatment system is designed and realized, the resin content of prepregs is determined by the dissolution method; standard deviation and dispersion coefficient are also calculated. The surface morphology, internal structure of prepregs, and the component of resin are observed and analyzed using a Metallurgical Microscope, scanning electron microscope (SEM), and near infrared radiation spectra (NIRS). The strength and performance of prepregs [(tensile strength, bending strength, tensile modulus of elasticity, bending modulus of elasticity, and interlaminar shear strength (ILSS)] are also tested. The results show the on-line ultrasonic treatment system can effectively improve the interfacial bonding of CFRP composites and enhance the strength and performance of CFRP composites.

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Ultrasonic properties of polystyrene‐based composites

Cited by 9 publications

References 65 publications

Non Destructive Testing for EPS Geofoam Quality Assurance

Non Destructive Testing for EPS Geofoam Quality Assurance

Ultrasonic properties of epoxy resin/marble waste powder composites

Effect of on-line ultrasonic treatment on the properties of carbon fiber reinforced plastic composites

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