Particle shape effects due to crushing method and size

Durney, T.E.; Meloy, T.P.

doi:10.1016/0301-7516(86)90078-5

Cited by 39 publications

(15 citation statements)

References 6 publications

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“…Therefore, impact crushers have high performance, low operation and maintenance cost as well as easy repairing and handling. On the contrary, in case of application secondary as well as tertiary processes are followed by vertically shafted crushers [10]. The discharge particle size is relatively small; particle shape is cubic and exhibits good abrasion resistance.…”

Section: Experimental Procedures and Approachmentioning

confidence: 99%

Influence of Crushed Coarse Aggregates on Properties of Concrete

Muhit¹,

Haque²,

Alam³

2013

AJCEA

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Both coarse aggregates and fine aggregates are the main constituents of concrete because they not only give the body to the concrete, it also have a significant effect on the fresh concrete based on aggregate's shape, size, texture, grading and crushing type. Moreover it is proved that aggregate's types has the severe effect on physicmechanical properties of concrete as aggregate covered almost 70 to 80 percent of the total volume of concrete. This paper investigates the effects on properties of concrete due to types of crushed aggregates alone. To observe the effects of crushed aggregates sharply, all other components like water cement ratio kept constant for each type and two types of crushed aggregates were used. 'Impact Crushed' and 'Vertically Shafted' aggregates type have been used to prepare five different groups of concrete blocks and these five groups have different water-cement (w/c) ratio. Source of these two aggregates, density and water absorption also kept constant to identify the effects on properties of concrete only for crushing type. Finally after 1 week and after 4 weeks slump values (consistency of the concrete) and compressive strength were measured without mixing any admixture or superplasticiser to the concrete. Compressive strength difference for all groups at 1 week and 4 weeks also analysed at the end of the study.

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Section: Experimental Procedures and Approachmentioning

confidence: 99%

Influence of Crushed Coarse Aggregates on Properties of Concrete

Muhit¹,

Haque²,

Alam³

2013

AJCEA

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“…Since they perform breaking only with crushing, their productions are cubic shaped and qualified. They are usually used in quarries [15].…”

Section: Methodsmentioning

confidence: 99%

Investigation of Crushing Type of Concrete s on Mechanical Properties of Concrete

Öztürk¹,

Erdem²,

Kozanoglu³

2012

IJME

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In this study, determination of the effects of concrete aggregates on mechanical properties of concrete due to crushing type was investigated. For this purpose, mechanical properties of concrete mixtures such as strength and flow are determined by using aggregates crushed by two different types of crusher. Different types of concrete mixtures are prepared by using aggregates developed by vertically shafted (VS) and impact crushers (IC). Properties of concrete compounds such as water, cement are kept constant for each crushing type to determine the aggregate effect for concrete sets having different mixture rates. Four different types of concrete sets with two different aggregate types have been produced to prevent the predominant influences of concrete compounds except aggregate on mechanical properties. Thus, there was no mineral and chemical admixture used in the mix to obtain the nominative effect of aggregates produced with different crushing types, on strength and flow. Strength values for 7 and 28 days are obtained and comparisons have been made according to crushing type.

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“…Although knowledge of the flow characteristics of cornmeal is essential for selection and design of several unit operations including blending, feeding, compaction, and fluidization, there is still need for more relevant flow property data (Barbosa‐Canovas, Ortega‐Rivas, Juliano, & Yan, ; Durney & Meloy, ; Molenda, Montross, Horabik, & Ross, ; Prescott & Barnum, ; Schwedes, ; Teunou & Fitzpatrick, ; Teunou, Fitzpatrick, & Synnott, ). Rheological parameters such as flow behavior index, apparent viscosity, and viscoelasticity of cornmeal dough have been widely researched, but there is a scarcity of literature about the cornmeal as an ingredient itself (Padmanabhan & Bhattacharya, ).…”

Section: Introductionmentioning

confidence: 99%

Effect of conditioner and moisture content on flowability of yellow cornmeal

Chinwan

Castell‐Perez

2019

Food Science & Nutrition

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Flow characterization of ground materials based on standard physical properties is not always accurate and must be complemented with other properties that help characterize their flowability. The flow properties of yellow cornmeal as a function of moisture content (10.0%, 13.5% 17.0%, and 20.0% wet basis) and concentrations of added conditioner (calcium stearate, a caking agent classified at GRAS, at 0.50%, 0.75%, and 1.00% wt/wt) were measured. The optimum flow behavior characteristics of the cornmeal were achieved at 0.50% wt/wt calcium stearate and 10.0% (w.b.) moisture content based on the flow function test. Overall, the material's flowability decreased with increased moisture content based on very high values for Hausner's ratio, Carr's Index, and angle of repose. The flow index (ffc) obtained by the flow function test decreased from 6.47 to 3.82 as moisture increased, indicating increased cohesivity. Calcium stearate increased the flowability of the material at 0.50% wt/wt, beyond which the flowability was not affected (p > .05). Samples were very hygroscopic and classified as Class IV. The Hausner's ratio, Carr's Index, and angle of repose showed a strong linear relationship with the flow index with correlation values of 0.91, 0.88, and 0.88, respectively. Isotherms together with physical properties should be used to determine the flow characteristics of granulated materials such as yellow cornmeal to establish the best storage and processing conditions.

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Particle shape effects due to crushing method and size

Cited by 39 publications

References 6 publications

Influence of Crushed Coarse Aggregates on Properties of Concrete

Influence of Crushed Coarse Aggregates on Properties of Concrete

Investigation of Crushing Type of Concrete s on Mechanical Properties of Concrete

Effect of conditioner and moisture content on flowability of yellow cornmeal

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