アスファルト乳剤の研究 (第1報)
陽イオン性アスファルト乳剤の粘度と安定性
1967 年 16 巻 1 号 p. 23-29
詳細
1967 年 16 巻 1 号 p. 23-29
Authors investigated the effect of emulsifiers on the properties of asphalt emulsions of commercially practice composition.
The purpose of the work reported here was to study the effect of emulsifiers on viscosity and stability of asphalt emulsions stabilized by cationic emulsifiers.
Fire different emulsifiers such as higher alkyl polyamines and quaternary ammonium salts, and two kinds of asphalt, pen 100/110 and pen 310/320, which have been used commonly in Japan wereused in this experiment.
Asphalt emulsions were prepared by Hurrell type homogenizer.
The emulsifier concentrations used varied from 0.5 to 1.5 wt% and the asphalt contents in emulsions were in the range of about 5565 wt%. Viscosity measurements were carried out with Brookfield Synchro-lectric Viscometer.
Stability measurements was based upon JIS K 2208 (1961).
The result obtained were as follows :
1) Increase of asphalt content above 60 wt%rised remarkably the viscosity of emulsions.
2) Viscosity of emulsions depended upon kinds of asphalt used;pen 310/320 asphalt was generally more susceptible to the influence of asphalt content as compared with pen 100/110 asphalt, showing higher viscosity.
3) The equation of Eilers : ηrel= [1+2.5/2 (1-Hφ)] 2 was well applied to the viscosity of cationic asphalt emulsions, showing H values generally pen 310/320>pen 100/110.
4) Facility of emulsifications in two kinds of asphalts resulted in general as pen 310/320>pen 100/110, while emulsion stability showed similar tendency.
5) It seems difficult to foresee the adaptability as emulsifiers from estimation of surface tension and interfacial tension.
