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The effect of particle strength on the compression of crushed aggregate

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Summary

The Effect of Particle Strength on the Compression of Crushed Aggregate

The paper examines the variables controlling the compression of rock aggregates, and presents experimental data on the behaviour of limestone, dolerite and sandstone samples in size ranges up to 19.0 mm.

The results suggest that while the initial void ratio of the aggregate determines the degree of compressive strain potentially available, the average aggregate dimension (d m) and intrinsic compressive strength (S c) determine the compressive stressstrain characteristics in the form,

$$\varepsilon \alpha \ln \frac{{\sigma d_m {1 \mathord{\left/ {\vphantom {1 2}} \right. \kern-\nulldelimiterspace} 2}}}{{S_c }}$$

Zusammenfassung

Einige Faktoren, die die Kompressibilität von Aggregaten bestimmen

Diese Arbeit untersucht die Variablen, die die Kompressibilität von Gesteinsaggregaten bestimmen, und liefert experimentelle Angaben über das Verhalten von Kalkstein-, Dolerit- und Sandsteinproben bis zu 19,0 mm Korngröße.

Die Ergebnisse weisen darauf hin, daß, während der anfängliche relative Porenraum des Aggregats den Grad der potentiell vorhandenen Kompressionsspannung bestimmt, der durchschnittliche Aggregatsdurchmesser (d m) und die eigentliche Druckfestigkeit (S c) die Kompressibilitäts-Spannungs-Verformungscharakteristik laut der Formel

$$\varepsilon \alpha \ln \frac{{\sigma d_m {1 \mathord{\left/ {\vphantom {1 2}} \right. \kern-\nulldelimiterspace} 2}}}{{S_c }}$$

bestimmen.

Résumé

Influence de la résistance des particules sur la compression d'un agrégat broyé

Les auteurs examinent les paramètres qui affectent la compressibilité des agrégats de roches et présentent des résultats expérimentaux obtenus avec des échantillons de calcaire, de dolérite et de grès, sur l'influence du diamètre des grains en-dessous de 19 mm.

Les résultats suggèrent que l'indice des vides initial impose le taux de la déformation à la compression dont on dispose, cependant que le diamètre des grains (d m) et la résistance à la compression (S c) définissen les caractéristiques de la courbe de compressibilité.

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Farmer, I.W., Attewell, P.B. The effect of particle strength on the compression of crushed aggregate. Rock Mechanics 5, 237–248 (1973). https://doi.org/10.1007/BF01301797

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