GB310922A - Process for covering roads and tiles and for manufacturing tiles, plates, blocks and the like - Google Patents

Abstract

310,922. Naamlooze Vennootschap Mijnbouw-en Cultuurmaatschappij Boeton. May 3, 1928, [Convention date]. Processes.-Relates to processes for covering roads and tiles and for manufacturing tiles, plates, blocks, &c. by rolling or moulding under pressure a plastic mass containing bitumen and a filler and consists in increasing the adhesiveness of the bitumen by the addition of low boiling solvents and then temporarily decreasing the adhesiveness of the mass, to prevent sticking to the mould or roller, by distributing water throughout it, and in expelling the water by the application of pressure in the subsequent treatment. The mass may be heated to a temperature not exceeding 100‹ C. prior to the application of pressure. The bituminous mass may be a natural asphalt, such as boeton asphalt limestone, or asphalt limestone of Val de Travers, or an artificial mixture of bitumen and filler. Examples of solvents are benzene, petrol and carbon disulphide. The mass may be applied to moist underlayers, for instance of concrete. Examples of suitables proportions are (1) 1000 kgs. of boeton asphalt limestone having a 30 per cent bitumen content, 3000 kgs. of gravel, 40 kgs. of flux, 80 litres of carbon disulphide and 120 litres of water. (2) 1000 lgs. of ground boeton asphalt limestone with a 30 per cent bitumen content, 3000 kgs of gravel, 50 kgs. of flux, 100 litres of carbon disulphide and 120 litres of water. Specification 310,923, [Class 22, Cements &c.], is referred to.