A STUDY OF CATIONIC EMULSIONS IN COMBINATION WITH ELECTRONEGATIVE AGGREGATES (V). TESTS TO DETERMINE THE INFLUENCE OF FINES (VI)

ESTUDIO CON EMULSIONES CATIONICAS Y ARIDOS ELECTRONEGATIVOS (V). ENSAYOS PARA VERIFICAR LA INFLUENCIA DE FINOS (VI)

The author presents the results of numerous tests carried out on gravel-emulsion specimens. The aggregates were quartzite of an electro-negative type, and the emulsions were cationic. The following tests were carried out:- simple compression, inverse compression, exposure to steam. Hveem-type samples were submitted to stability and cohesion tests. In the course of the tests the following factors were varied:- the age of specimens at rupture, the type of emulsion (as between rapid and slow-rupture types), the type of post-treatment (air or oven, water-bath or steam). The influence of the percentage of binder on compression-immersion tests and on steam tests was studied. It was possible to observe that the rate of absorption was greater with the cationic emulsions, also that, at low binder content, the adhesion was inferior. To evaluate the effect of fines, tests were carried out in which the fines in quartzite aggregates were replaced by various percentages of limestone, using cationic and anionic emulsions with slow rupture properties. The densities obtained were comparable for the two types of emulsion, but increased with the percentage of limestone. The dry stability was superior with cationic emulsions, and increased with the limestone content. The stability of immersed speciments was greater with the cationic emulsions. The stability in steam tests depended on the maximum limestone content. /TRRL/

• Corporate Authors:

  Portavoz de la Agrupacion Nacional de Fabricantes

  Seccion Publicidad, Quinones 15-1
  Madrid 8,   Spain 
• Authors:
  • Diez, J
  • Valero, L
• Publication Date: 1975-1

Language

• Spanish

Media Info

• Features: Figures; Photos; Tables;
• Pagination: p. 11-29
• Serial:
  • Alemas
  • Issue Number: 78

Subject/Index Terms

• TRT Terms: Absorption; Aggregates; Analysis; Anions; Binders; Cations; Cohesion; Compression tests; Electrolysis; Emulsions; Fillers (Materials); Fines (Materials); Gravel; Hveem stabilometer; Immersion tests; Limestone; Mixtures; Quartzite; Rates; Rock fracture; Stability (Mechanics); Steam; Testing
• Identifier Terms: Hveem
• Uncontrolled Terms: Emulsion breaking
• Old TRIS Terms: Cationic emulsion; Electrolytic analysis
• ITRD Terms: 4577: Aggregate; 7125: Anion; 4993: Bitumen emulsion; 4994: Breaking (emulsion); 7124: Cation; 4599: Filler; 4575: Gravel; 6292: Hveem; 6213: Immersion test; 9047: Mixture; 6713: Steam
• Subject Areas: Geotechnology; Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00165640
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analtyic
• Files: ITRD, TRIS
• Created Date: Mar 14 1978 12:00AM