A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
RAP-steel slag thermal regeneration asphalt mixture as well as preparation method and application thereof
The invention discloses an RAP-steel slag thermal regeneration asphalt mixture and a preparation method and application thereof, the preparation method comprises the following steps: (1) primary regeneration: mixing RAP fine aggregate with an asphalt regenerant, and regenerating at the temperature of not more than 60 DEG C, so that the softening point of aged asphalt in the RAP fine aggregate is reduced by 15% or more to obtain regenerated RAP fine aggregate; (2) secondary thermal regeneration: heating the regenerated RAP fine aggregate to 130-150 DEG C, heating the steel slag coarse aggregate to 200-220 DEG C, adding new asphalt and mineral powder while hot, and mixing to obtain an RAP-steel slag thermal regenerated asphalt mixture; wherein the regenerated RAP fine aggregate accounts for 15wt%-45wt% of the total amount of the aggregate, the steel slag accounts for 55wt%-85wt% of the total amount of the aggregate, according to the method, two times of regeneration treatment are adopted, the utilization rate of the RAP fine aggregate can be obviously increased, and the pavement performance of the asphalt mixture with the doping amount exceeding 30wt% is also good.
本发明公开了一种RAP‑钢渣热再生沥青混合料及其制备方法和应用，所述制备方法包括(1)一次再生：将RAP细集料与沥青再生剂混合，在不超过60℃条件下进行再生，使得RAP细集料中老化沥青的软化点降低15％以上，获得再生RAP细集料；(2)二次热再生：将再生RAP细集料加热至130℃～150℃，钢渣粗集料加热至200℃～220℃，并趁热添加新沥青、矿粉，混合即为RAP‑钢渣热再生沥青混合料；其中再生RAP细集料占集料总量的15wt％～45wt％，钢渣占集料总量的55wt％～85wt％，该方法采用两次再生处理，能够明显提升RAP细集料利用率，其掺量超过30wt％制备的沥青混合料路用性能同样良好。
RAP-steel slag thermal regeneration asphalt mixture as well as preparation method and application thereof
The invention discloses an RAP-steel slag thermal regeneration asphalt mixture and a preparation method and application thereof, the preparation method comprises the following steps: (1) primary regeneration: mixing RAP fine aggregate with an asphalt regenerant, and regenerating at the temperature of not more than 60 DEG C, so that the softening point of aged asphalt in the RAP fine aggregate is reduced by 15% or more to obtain regenerated RAP fine aggregate; (2) secondary thermal regeneration: heating the regenerated RAP fine aggregate to 130-150 DEG C, heating the steel slag coarse aggregate to 200-220 DEG C, adding new asphalt and mineral powder while hot, and mixing to obtain an RAP-steel slag thermal regenerated asphalt mixture; wherein the regenerated RAP fine aggregate accounts for 15wt%-45wt% of the total amount of the aggregate, the steel slag accounts for 55wt%-85wt% of the total amount of the aggregate, according to the method, two times of regeneration treatment are adopted, the utilization rate of the RAP fine aggregate can be obviously increased, and the pavement performance of the asphalt mixture with the doping amount exceeding 30wt% is also good.
本发明公开了一种RAP‑钢渣热再生沥青混合料及其制备方法和应用，所述制备方法包括(1)一次再生：将RAP细集料与沥青再生剂混合，在不超过60℃条件下进行再生，使得RAP细集料中老化沥青的软化点降低15％以上，获得再生RAP细集料；(2)二次热再生：将再生RAP细集料加热至130℃～150℃，钢渣粗集料加热至200℃～220℃，并趁热添加新沥青、矿粉，混合即为RAP‑钢渣热再生沥青混合料；其中再生RAP细集料占集料总量的15wt％～45wt％，钢渣占集料总量的55wt％～85wt％，该方法采用两次再生处理，能够明显提升RAP细集料利用率，其掺量超过30wt％制备的沥青混合料路用性能同样良好。
RAP-steel slag thermal regeneration asphalt mixture as well as preparation method and application thereof
一种RAP-钢渣热再生沥青混合料及其制备方法和应用
SONG JIANJUN (author) / WU SHAOPENG (author) / ZHUO WUJI (author) / YU JUNLIN (author) / SONG YU (author) / LIU SHENGWEI (author) / CHEN ANQI (author) / QIN HUALONG (author) / ZHANG YU (author)
2023-07-21
Patent
Electronic Resource
Chinese
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