Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mix proportion design method of skeleton dense type hot mix plant recycled asphalt mixture
The invention discloses a mix proportion design method of a skeleton dense type plant-mixed hot recycled asphalt mixture, and relates to the technical field of road engineering, and the mix proportion design method comprises the following steps: selecting raw materials; the raw materials comprise newly added aggregate and RAP, performance detection is carried out on the newly added aggregate, and an extraction screening test is carried out on the RAP; sAC framework dense type grading is adopted for the mixture, when the mix proportion is designed, raw materials are divided into framework aggregate and filler, the volume ratio of the framework aggregate to the filler is 70: 30, then the blending proportion of coarse aggregate of 4.75 mm or above is calculated according to a SAC framework aggregate grading key sieve mesh passing rate calculation method, a newly added aggregate screening result and an RAP screening result, and the coarse aggregate blending proportion of 4.75 mm or above is calculated according to the SAC framework aggregate grading key sieve mesh passing rate calculation method, the newly added aggregate screening result and the RAP screening result. During calculation, the blending proportion of the RAP in the raw materials is consistent with the grading proportion of coarse and fine aggregates in the RAP; a Marshall test is carried out on the hot mix plant recycled asphalt mixture, and the filler is adjusted according to the actually measured porosity. According to the invention, the uniform distribution of the asphalt cement in the RAP can be realized, and the high-temperature rutting resistance of the mixture is improved.
本发明公开一种骨架密实型厂拌热再生沥青混合料的配合比设计方法，涉及道路工程技术领域，包括：选取原材料；原材料包括新加集料和RAP，对新加集料进行性能检测，对RAP进行抽提筛分试验；混合料采用SAC骨架密实型级配，在配合比设计时，将原材料划分为骨架集料和填充料，且骨架集料与填充料的体积比为70:30，随后根据SAC骨架集料级配关键筛孔通过率计算方法及新加集料筛分结果、RAP筛分结果进行4.75mm以上粗集料掺配比例计算，计算时RAP在原材料中的掺配比例与RAP中粗细集料的分档比例一致；对厂拌热再生沥青混合料进行马歇尔试验，根据实测孔隙率大小进行填充料的调整。本发明可以实现RAP中沥青胶泥的均匀分布，提升混合料的高温抗车辙性能。
Mix proportion design method of skeleton dense type hot mix plant recycled asphalt mixture
The invention discloses a mix proportion design method of a skeleton dense type plant-mixed hot recycled asphalt mixture, and relates to the technical field of road engineering, and the mix proportion design method comprises the following steps: selecting raw materials; the raw materials comprise newly added aggregate and RAP, performance detection is carried out on the newly added aggregate, and an extraction screening test is carried out on the RAP; sAC framework dense type grading is adopted for the mixture, when the mix proportion is designed, raw materials are divided into framework aggregate and filler, the volume ratio of the framework aggregate to the filler is 70: 30, then the blending proportion of coarse aggregate of 4.75 mm or above is calculated according to a SAC framework aggregate grading key sieve mesh passing rate calculation method, a newly added aggregate screening result and an RAP screening result, and the coarse aggregate blending proportion of 4.75 mm or above is calculated according to the SAC framework aggregate grading key sieve mesh passing rate calculation method, the newly added aggregate screening result and the RAP screening result. During calculation, the blending proportion of the RAP in the raw materials is consistent with the grading proportion of coarse and fine aggregates in the RAP; a Marshall test is carried out on the hot mix plant recycled asphalt mixture, and the filler is adjusted according to the actually measured porosity. According to the invention, the uniform distribution of the asphalt cement in the RAP can be realized, and the high-temperature rutting resistance of the mixture is improved.
本发明公开一种骨架密实型厂拌热再生沥青混合料的配合比设计方法，涉及道路工程技术领域，包括：选取原材料；原材料包括新加集料和RAP，对新加集料进行性能检测，对RAP进行抽提筛分试验；混合料采用SAC骨架密实型级配，在配合比设计时，将原材料划分为骨架集料和填充料，且骨架集料与填充料的体积比为70:30，随后根据SAC骨架集料级配关键筛孔通过率计算方法及新加集料筛分结果、RAP筛分结果进行4.75mm以上粗集料掺配比例计算，计算时RAP在原材料中的掺配比例与RAP中粗细集料的分档比例一致；对厂拌热再生沥青混合料进行马歇尔试验，根据实测孔隙率大小进行填充料的调整。本发明可以实现RAP中沥青胶泥的均匀分布，提升混合料的高温抗车辙性能。
Mix proportion design method of skeleton dense type hot mix plant recycled asphalt mixture
骨架密实型厂拌热再生沥青混合料的配合比设计方法
YOU JIAHUA (Autor:in) / XI CONG (Autor:in) / ZHANG ZHAOJIE (Autor:in) / WANG YIMING (Autor:in) / FU GUOHUA (Autor:in) / ZHANG HUAN (Autor:in) / XUAN HAO (Autor:in) / YUAN ZHAODI (Autor:in) / ZHANG JIAQI (Autor:in)
12.04.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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