温拌沥青混合料的拌和与压实温度预估
发布时间：2018-07-13 16:44
【摘要】：为了预估适用于温拌沥青混合料的拌和与压实温度,该文选择了4种基于不同机理的温拌添加剂,预估其合理的拌和温度和压实温度:在拌和温度预估阶段,以裹附率为控制指标,在考虑设定拌和温度的本质和温拌目的情况下,基于设定的温拌温度确定添加剂的合理掺量;在压实温度预估阶段,以变温度击实试验为手段,基于等密实度-击实温度类比原则,建立普通热拌与温拌混合料之间空隙率指标的对应关系,进而明确温拌混合料的可压实温度范围。研究表明:沥青黏度受到拌和温度和添加剂掺量的双重影响,基于设定温拌降温幅度并以裹附率为控制指标确定的添加剂掺量是合理的;由于添加剂降黏机理的不同,导致其在施工不同阶段的含量与状态不同,从而对施工温度的影响略有差异。
[Abstract]:In order to predict the mixing and compaction temperature of warm mix asphalt mixture, four kinds of warm mixing additives based on different mechanism were selected to predict the reasonable mixing temperature and compaction temperature: in the stage of mixing temperature prediction, Under the condition of considering the essence of mixing temperature and the purpose of warm mixing, the reasonable content of additive is determined based on the set temperature, and the compaction temperature is used as the means of compaction temperature prediction, with the binding rate as the control index, and considering the nature of mixing temperature and the purpose of warm-mixing, the reasonable content of additives is determined based on the set warm-mix temperature. Based on the analogy principle of equal compactness and compaction temperature, the corresponding relationship of voidage index between common hot mix and warm mix is established, and the compacting temperature range of warm mix is determined. The results show that the viscosity of asphalt is affected by mixing temperature and additive content, and the additive content is reasonable based on setting the temperature drop range of warm mixing and taking the adhesion rate as the control index, because of the different viscosity reduction mechanism of additives. As a result, the content and state are different in different stages of construction, and the influence on construction temperature is slightly different.
【作者单位】： 东北林业大学土木工程学院;
【基金】：黑龙江省自然科学基金资助项目(编号:E201136) 中央高校基本科研业务费专项资金资助项目(编号:2572014CB22)
【分类号】：U414
本文编号：2120076
[Abstract]:In order to predict the mixing and compaction temperature of warm mix asphalt mixture, four kinds of warm mixing additives based on different mechanism were selected to predict the reasonable mixing temperature and compaction temperature: in the stage of mixing temperature prediction, Under the condition of considering the essence of mixing temperature and the purpose of warm mixing, the reasonable content of additive is determined based on the set temperature, and the compaction temperature is used as the means of compaction temperature prediction, with the binding rate as the control index, and considering the nature of mixing temperature and the purpose of warm-mixing, the reasonable content of additives is determined based on the set warm-mix temperature. Based on the analogy principle of equal compactness and compaction temperature, the corresponding relationship of voidage index between common hot mix and warm mix is established, and the compacting temperature range of warm mix is determined. The results show that the viscosity of asphalt is affected by mixing temperature and additive content, and the additive content is reasonable based on setting the temperature drop range of warm mixing and taking the adhesion rate as the control index, because of the different viscosity reduction mechanism of additives. As a result, the content and state are different in different stages of construction, and the influence on construction temperature is slightly different.
【作者单位】： 东北林业大学土木工程学院;
【基金】：黑龙江省自然科学基金资助项目(编号:E201136) 中央高校基本科研业务费专项资金资助项目(编号:2572014CB22)
【分类号】：U414
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