Abstract

In the first part of this work, the main lines of the investigation work developed at LABEIN on the «Influence of the limy and clayey slimes from calcareous crushed sands on concrete properties» are presented. As a consequence of it, new limits are proposed to consideration regarding the admissible content of slime in crushed sands, reaching a limit higher than 15%, controling the slime nature by means of an equivalent of normal sand and specially by Methylene Blue. The second part of the work is devoted to the development of the methodology for the obtention of Methylene Blue, in sands used in the elaboration of concrete which have a little amount of clay, taking as a base the method applied by French normative, duly adapted and with different expression of the results.

Highlights

  • La limpieza de las arenas es un problema antiguo, que no se ha logrado ver reflejado todavía satisfactoriamente, en la normativa española

  • the main Unes of the investigation work developed at LABEIN on the «Influence

  • As a consequence of it, new limits are proposed to consideration regarding the admissible content of slime

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Summary

SUMMARY

In the first part of this work, the main Unes of the investigation work developed at LABEIN on the «Influence of the limy and clayey slimes from calcareous crushed sands on concrete properties» are presented. As a consequence of it, new limits are proposed to consideration regarding the admissible content of slime in crushed sands, reaching a limit higher than 15%, controling the slime nature by means of an equivalent of normal sand and specially by Methylene Blue. The second part of the work is devoted to the development of the methodology for the obtention of Methylene Blue, in sands used in the elaboration of concrete which have a little amount of clay, taking as a base the method applied by French normative, duly adapted and with different expression of the results

Introducción
Control de las sustancias perjudiciales
Consideración de nuevos límites de finos en arenas calizas de machaqueo
EL ENSAYO DEL AZUL DE METILENO
Findings
Generalidades

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