On the use of an instrumented set-up to characterize the impact behaviour of an epoxy system containing varying fly ash content

This paper describes the results of falling weight impact tests (FWITs) on glass-fibre-reinforced (GRP) laminates and E-glass/Dyneema® hybrid laminates. The test programme consisted of (i) falling weight impact tests to determine the penetration energy and (ii) experiments to determine the influence of hybrid construction on damage development and impact fatigue lifetime under repeated impact conditions at sub-penetration energy levels. The objective of this work was to investigate the effect of hybridisation on the impact behaviour of GRP laminates as well as to find optimal conditions for hybridisation. It was shown that in the case of a rigid test set-up - and hence small deflections - the influence of the Dyneema® on the impact behaviour of hybrid laminates is rather small because damage processes are the result of local contact stresses in the vicinity of the impact body, whereas in the case of a compliant test set-up and large deflections the high energy storage capacity of the ductile Dyneema® fibres is used far more effectively for the protection of hybrid composite laminates. Therefore, it was concluded that in order to fully utilise the potential of high-performance polyethylene fibres it is essential that these fibres are located on the (non-impacted) tensile side of an impacted laminate and that the geometrical test conditions are such that large (bending) deformations are allowed.

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The Effect of a Starch Envelope on Fly Ash Particles on the Impact Properties of Filled Epoxy Composites

Advanced Composites Letters ◽

10.1177/096369350301200201 ◽

2003 ◽

Vol 12 (2) ◽

pp. 096369350301200

Author(s):

Kishore ◽

N. L. Ravikumar ◽

D. Sunil

Keyword(s):

Fly Ash ◽

Maximum Load ◽

The Other ◽

Impact Response ◽

Epoxy Composites ◽

Epoxy System ◽

Ductility Index ◽

Behavioural Patterns ◽

The Impact ◽

Fracture Features

The impact behaviour of epoxy specimens containing 20% by volume of fly ash particles without (coded, FA20) and with surface enveloped by starch in dry (FAS20) and water-ingresses (FASM20) conditions is studied. The resulting behavioural patterns are documented and compared to the composites containing as received fly ash particles. The data on unreinforced (i.e. neat) epoxy system (designated, NE) are also included. Samples with starch covering for the fillers whether tested in dry or wet conditions (i.e. FAS20 & FASM20) showed greater absorption of energy and maximum load compared to the ones derived on composites having as received fillers tested in unexposed (dry) condition (FA20). Ductility Index, D.I. on the other hand, showed a reversal in trends; the energy absorbed was highest for NE and lowest FA20 samples. Scanning microscopic examination of the fracture features was undertaken to correlate the microstructure to impact response.

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Effect of Fly Ash Content on Mechanical Properties of Cement-Fly Ash Stabilized Crushed Stones

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.548-549.228 ◽

2014 ◽

Vol 548-549 ◽

pp. 228-232 ◽

Cited By ~ 1

Author(s):

Xiao Chen ◽

Ji Wei Liu ◽

Ming Kai Zhou

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Fly Ash ◽

Crack Resistance ◽

Unconfined Compressive Strength ◽

Resilient Modulus ◽

Ash Content ◽

Mechanical Parameters ◽

Cleavage Strength ◽

The Impact

To improve the impact of fly ash on the properties of cement-fly ash stabilized crushed stone, and promote it popularize and apply better. This paper investigated the effect of fly ash content on unconfined compressive strength, cleavage strength and resilient modulus of cement-fly ash stabilized crushed stones, and those relationships between mechanical parameters. The results showed that with increasing of the fly ash content, the unconfined compressive strength and cleavage strength increased at first, then decreased, the resilient modulus decreased, and The brittleness index increased. We can conclude that the optimal fly ash content is between 10% and 15%, and increment of fly ash content can improve its crack-resistance.

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The Impact Molding and Test Results of High Fly Ash Block

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.357-360.671 ◽

2013 ◽

Vol 357-360 ◽

pp. 671-675

Author(s):

Zhong Dong Liu ◽

Wen Juan Zhao

Keyword(s):

Fly Ash ◽

Ash Content ◽

Test Results ◽

Vibration Compaction ◽

The Impact

In this paper the molding mechanisms of mibration compaction for concrete bricks is explained. A lot of concrete bricks with different ash content were by a vibration compaction machines produced. The characteristics of the concrete bricks are investigated. The experiments showed that the starting hardness of the concrete bricks at the separation from molding tools is sufficient for brick stacking.

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Effect of surface treatment on the impact behaviour of fly-ash filled polymer composites

Polymer International ◽

10.1002/pi.1055 ◽

2002 ◽

Vol 51 (12) ◽

pp. 1378-1384 ◽

Cited By ~ 28

Author(s):

Kishore ◽

S?M Kulkarni ◽

D Sunil ◽

S Sharathchandra

Keyword(s):

Fly Ash ◽

Surface Treatment ◽

Polymer Composites ◽

Filled Polymer ◽

Impact Behaviour ◽

The Impact ◽

Effect Of Surface

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ALFA: Fly Ash - Aluminium Metal Matrix Composites for Light Weight Material

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.c6884.098319 ◽

2019 ◽

Vol 8 (3) ◽

pp. 8897-8898

Keyword(s):

Fly Ash ◽

Impact Energy ◽

Aluminum Matrix ◽

Stir Casting ◽

Ash Content ◽

Phase Identification ◽

Light Weight ◽

Matrix Composites ◽

The Impact ◽

Aluminium Metal

In the present work, properties such as wear rate, hardness, impact energy and microstructure of the Aluminum-fly ash composite synthesized by stir casting were investigated by varying the fly ash in the range of 5 and 15 by weight %. The phase identification and structural characterization was carried out on ALFA composites using SEM and EDAX tests and it was found that there was a uniform distribution of fly ash particles in the aluminum matrix phase. The hardness and the wear resistance increased and the impact energy decreased as the fly ash content in the ALFA composite was increased and it can be used as a light weight material for many engineering and non-engineering applications

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Influence of Fly Ash Addition on Behavior of Soft Clayey Soil

Engineering and Technology Journal ◽

10.30684/etj.v38i5a.426 ◽

2020 ◽

Vol 38 (5A) ◽

pp. 698-706

Author(s):

Hussein H. Karim ◽

Zeena W. Samueel ◽

Adel H. Jassem

Keyword(s):

Fly Ash ◽

Specific Gravity ◽

Clayey Soil ◽

Soft Soil ◽

Cost Effective ◽

Liquid Limit ◽

Ash Content ◽

Unit Weight ◽

Cost Effective Method ◽

The Impact

This paper investigates the impact of the fly Ash addition on the Geotechnical properties of soft soil as well as chooses the optimum percentage added of fly ash. To understand the behavior of fly ash mixed with soil, a number of laboratory experiments testing conducted on clayey soil-fly ash mixture in several percentages (5,10,15,20,25, and 30%) as Atterberg test, Specific gravity test, compaction test, California Bearing Ratio (C.B.R) Test, Unconfined Compressive Strength (UCS) Test, Consolidation Test. Test results indicate rising in plastic limit and liquid limit as fly ash adding. Specific gravity decreased essentially by adding fly ash. Whereas there was falling on the Dry unit weight value with the contract to the decreasing in the water content. The CBR and UCS values were increased with increasing fly ash content. 20% was the optimum fly Ash content. This study also benefits the effective use of fly ash and thus a cost-effective method for improving the soil properties.

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The Effect of a Starch Envelope on Fly Ash Particles on the Impact Properties of Filled Epoxy Composites

Advanced Composites Letters ◽

10.1177/096369350301200401 ◽

2003 ◽

Vol 12 (4) ◽

pp. 096369350301200 ◽

Cited By ~ 1

Author(s):

Kishore ◽

N. L. Ravikumar ◽

D. Sunil

Keyword(s):

Fly Ash ◽

Maximum Load ◽

The Other ◽

Impact Response ◽

Epoxy Composites ◽

Epoxy System ◽

Ductility Index ◽

Behavioural Patterns ◽

The Impact ◽

Fracture Features

The impact behaviour of epoxy specimens containing 20% by volume of fly ash particles without (coded, FA20) and with surface enveloped by starch in dry (FAS20) and water-ingresses (FASM20) conditions is studied. The resulting behavioural patterns are documented and compared to the composites containing as received fly ash particles. The data on unreinforced (i.e. neat) epoxy system (designated, NE) are also included. Samples with starch covering for the fillers whether tested in dry or wet conditions (i.e. FAS20 & FASM20) showed greater absorption of energy and maximum load compared to the ones derived on composites having as received fillers tested in unexposed (dry) condition (FA20). Ductility Index, D.I. on the other hand, showed a reversal in trends; the energy absorbed was highest for NE and lowest FA20 samples. Scanning microscopic examination of the fracture features was undertaken to correlate the microstructure to impact response.

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Frost-Resisting Property of Bridge Concrete in Alpine Frigid Region

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.857.239 ◽

2013 ◽

Vol 857 ◽

pp. 239-247

Author(s):

Yin Chuan Guo ◽

Ai Qin Shen ◽

Jian Wang ◽

Hong Ji Zhao

Keyword(s):

Fly Ash ◽

Water Consumption ◽

Reference Value ◽

Ash Content ◽

Impact Mechanism ◽

Air Content ◽

Influence Of Water ◽

Binder Ratio ◽

The Impact ◽

Water Binder Ratio

Supported by the Guozigou-bridge, the paper studied the Frost-resisting property of bridge concrete in alpine frigid region. Researched the effect of water-binder ratio, fly-ash content, water consumption and air-entraining agent consumption, and reveals the impact mechanism of frost-resisting property of bridge concrete in alpine frigid region. Analyzed the influence rule of frost-resisting property and showed reference value of concrete's ingredient rate in alpine frigid region. The result showed that low water-binder ratio and water consumption can effectively improve the deicer-frost resistance of concrete and the influence of water consumption is more significant. Best air content between 4.5% ~ 4.5%.

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Durability of Cement and Ash Mortars with Fluidized and Siliceous Fly Ashes Exposed to HCl Acid Environment over a Period of 2 Years

Materials ◽

10.3390/ma14123229 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3229

Author(s):

Elżbieta Janowska-Renkas ◽

Agnieszka Kaliciak ◽

Grzegorz Janus ◽

Jolanta Kowalska

Keyword(s):

Fly Ash ◽

Ash Content ◽

Fluidized Bed Combustion ◽

Solution Ph ◽

Aggressive Environment ◽

Acid Environment ◽

20 Nm ◽

The Impact ◽

Fbc Fly Ash ◽

Simultaneous Growth

The paper presents results of research on the impact of fly ash from fluidized bed combustion (FBC) of lignite, used in quantities of 30 and 45% by mass, and the mixture of FBC and silicious fly ash in amount of 45% by mass, on properties of cement–ash mortars. Mortars were exposed to aggressive environment of 1, 3, and 5% HCl solutions for 2 years. Mortars containing 45% FBC exposed to 1% HCl solution (pH = 2) showed the highest durability from among other mortars. The growth of their strength observed after 90 days of testing in 1% HCl environment, as well as the lowest drop of strength after 730 days of exposure to this environment, resulted from the reduced amount of large pores from 20 to 200 nm in mortars containing fly ash, with simultaneous growth of smaller pores of <20 nm during testing. A beneficial effect has been demonstrated of FBC addition to cement on properties of cement–ash mortars exposed to the aggressive impact of the HCl. Mortars with FBC fly-ash content increased to 45% by mass showed higher strength values, smaller differences in linear and mass changes, and increased durability in an aggressive environment observed during 730 days of testing.

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