Emulsifier for cold recycled emulsified asphalts, and phosphoric acid activated cold recycled emulsified asphalt and preparation method thereof

The invention belongs to the technical field of cold recycled emulsified asphalts, and particularly relates to an emulsifier for cold recycled emulsified asphalts, and a phosphoric acid activated coldrecycled emulsified asphalt and a preparation method thereof. According to the present invention, the emulsifier for cold recycled emulsified asphalts is formed by using lignin amine, piperazine, hydroxypropylmethylcellulose and organosilicon as raw materials, and the emulsifier can cooperate with phosphoric acid so as to improve the wrapping effect of the emulsified asphalt to the aggregate, prolong the working time of the mixture, and expand the transportation radius of the phosphoric acid activated cold recycled emulsified asphalt mixture. 本发明属于冷再生乳化沥青技术领域，特别涉及种冷再生乳化沥青用乳化剂和磷酸活化冷再生乳化沥青及其制备方法。本发明以木质素胺、哌嗪、羟丙基甲基纤维素和有机硅为原料，形成冷再生乳化沥青用乳化剂，该乳化剂能够与磷酸配合作用，提高乳化沥青对集料的裹覆效果，延长混合料的可工作时间，扩大磷酸活化冷再生乳化沥青混合料的运输半径。