Pore Distribution and Water Uptake in a Cenosphere-Cement Paste Composite Material

Baronins, Janis; Sētiņa, Janīna; Šahmenko, Genādijs; Lagzdiņa, Santa; Shishkin, Andrei

doi:10.1088/1757-899x/96/1/012011

Cited by 27 publications

(17 citation statements)

References 11 publications

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“…Fly ash cenospheres are used to develop hybrid syntactic foams of metal with clay with focus on wear resistant applications . Presence of cenospheres in cement paste lowers moisture absorption making them most suitable in construction sector . In structural applications in vehicles, these foams can come across a verity of loading conditions, including erosion, which is the focus of this work.…”

Section: Introductionmentioning

confidence: 99%

Effect of cenosphere filler surface treatment on the erosion behavior of epoxy matrix syntactic foams

et al. 2018

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Influence of cenosphere surface modification and volume fraction on the solid particle erosion of cenosphere/epoxy syntactic foams is investigated. Fly ash cenospheres are used as filler in both as received and silane surface modified configurations. Erosion behavior is studied at room temperature for different impact angles (30, 45, 60, and 90 ) and velocities (30, 45, and 60 m/s). Neat epoxy shows the highest erosion rate compared with that of the syntactic foams. Results show a strong dependence of impact angle and velocity on erosion rate of syntactic foams. With increasing cenosphere content erosion rate decreases for all impact angles. Erosion rate decreases with increasing impact angle and with decreasing velocity. Good interfacial bonding of treated cenospheres enhances the erosion resistance. All the samples exhibit ductile erosive behavior, with maximum erosion at 30 . The velocity exponent and erosion efficiency parameters confirm the ductile behavior of syntactic foams. POLYM. COMPOS., 40:2109-2118, 2019

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Section: Introductionmentioning

confidence: 99%

Effect of cenosphere filler surface treatment on the erosion behavior of epoxy matrix syntactic foams

et al. 2018

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“…It is likely that despite the shorter dwelling times used in the present study, such phase formation will also take place in the materials investigated here. Arguments in this respect include the composition of Liepa illite clay with its SiO 2 content of 62.55 ± 0.5 wt % as reported by Shishkin et al [ 13 ], which is present in the form of quartz [ 22 ], as well as the higher firing temperatures. This may be expected to partly compensate shorter dwelling times also in view of the prolonged time associated with temperature ramp-up to the higher final values (216 min for heating up to 1100 °C; 226 min for reaching 1150 °C and 236 min for 1200 °C, each at 5 °C/min, starting from an initial 20 °C).…”

Section: Resultsmentioning

confidence: 99%

“…These kinds of filler particles provide a low density and superior compressive strength, combined with enhanced acoustic and thermal damping characteristics [ 11 , 12 , 13 ]. In the last decade, the metal matrix SF added by the cenospheres have been studied intensively [ 7 , 14 , 15 , 16 , 17 ], alongside hybrid metal-matrix composites [ 18 ], advanced ceramic matrix materials [ 19 , 20 , 21 ], and concrete [ 22 ]. However, there is a lack of published information on natural clay ceramic matrix cenosphere-based SFs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fly-Ash Cenospheres on Properties of Clay-Ceramic Syntactic Foams

et al. 2017

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A low-density clay ceramic syntactic foam (CSF) composite material was successfully synthesized from illitic clay added by fly ash cenospheres (CS) using the semi-dry formation method. The content of CS varied in the range of 10, 30, 50 and 60 vol %. Furthermore, reference samples without cenospheres were produced for property comparison. The materials comprising different amount of the additives were fired at temperatures of 600, 950, 1000, 1050, 1100, 1150 and 1200 °C. Firing times were kept constant at 30 min. Processing characteristics of the materials were evaluated in terms of density achieved and shrinkage observed as functions of both the CS content and the sintering temperature. The compressive strength and water uptake were determined as application-oriented properties. Except for the reference and the low CS level samples, the materials show an increase in strength with the increase in firing temperature, and a decrease of mechanical reliability with a decrease in density, which is typical for porous materials. Exceptions are the samples with no or low (10 vol %) content of cenospheres. In this case, the maximum strength is obtained at an intermediate sintering temperature of 1100 °C. At a low density (1.10 and 1.25 g/cm3), the highest levels of strength are obtained after sintering at 1200 °C. For nominal porosity levels of 50 and 60 vol %, 41 and 26 MPa peak stresses, respectively, are recorded under compressive load.

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“…. The chemical composition of AC was studied previously in [5] and it has been approved as an efficient heat-resistant inert filler for ceramics [6] and lightweight concrete [7]. Figure 2 shows the SEM images of the filler materials used.…”

Section: Initial Materialsmentioning

confidence: 99%