Studies on Asphalt Emulsion.I.

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  • WADA Yutaka
    Nippon Oils&Fats Co., Ltd. Oils&Fats Research Laboratory
  • IZAIKU Hiromi
    Nippon Oils&Fats Co., Ltd. Oils&Fats Research Laboratory
  • KOIKE Motoo
    Nippon Oils&Fats Co., Ltd. Oils&Fats Research Laboratory

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Other Title
  • アスファルト乳剤の研究 (第1報)
  • アスファルト ニュウザイ ノ ケンキュウ 1 ヨウイオンセイ アスファルト ニュウザイ ノ ネンド ト アンテイセイ
  • Viscosity and Stability of Cationic Asphalt Emulsions
  • 陽イオン性アスファルト乳剤の粘度と安定性

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Authors investigated the effect of emulsifiers on the properties of asphalt emulsions of commercially practice composition.<BR>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.<BR>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.<BR>Asphalt emulsions were prepared by Hurrell type homogenizer.<BR>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.<BR>Stability measurements was based upon JIS K 2208 (1961).<BR>The result obtained were as follows : <BR>1) Increase of asphalt content above 60 wt%rised remarkably the viscosity of emulsions.<BR>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.<BR>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.<BR>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.<BR>5) It seems difficult to foresee the adaptability as emulsifiers from estimation of surface tension and interfacial tension.

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