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发明公开
CN105271947A 基于岩沥青复合改性的间断级配BRMA混合料的制备方法 无效 - 驳回

基于岩沥青复合改性的间断级配BRMA混合料的制备方法
摘要：
本发明公开一种基于岩沥青复合改性的间断级配BRMA混合料的制备方法，步骤包括：1)、取35～45份10～15mm、25～35份5～10mm玄武岩粗集料和20～30份0～3mm的石灰岩细集料组成间断级配矿料，并加热到180℃～190℃；2)、在加热后的粗、细集料混合物中加入3～5份高灰分天然岩沥青，干拌15～20s；3)、将3～5份SBS改性沥青加热至160℃～170℃，在2)的混合物中喷洒加热后的SBS改性沥青，湿拌40～45s；4)、在3)的混合物中加入7～10份矿粉，搅拌均匀后即得到目标产物。本发明通过间断级配矿物集料、高灰分天然岩沥青和SBS改性沥青的混合，通过高灰分天然岩沥青和SBS复合改性，弥补因岩沥青改性导致沥青的延展性能下降；同时降低SBS改性沥青用量，降低混合料生产过程中对环境的污染以及节约成本。
摘要（英）：

The present invention discloses a preparation method of a gap-graded BRMA mixture on the basis of rock asphalt compound modification, and the preparation method comprises the following steps: 1), taking 35 to 45 parts of 10-15mm basalt coarse aggregate, 25-35 parts of 5-10mm basalt coarse aggregate and 20 to 30 parts of 0-3mm limestone fine aggregate for composition of a gap-graded ore material, and heating to 180 DEG C-190 DEG C; 2), adding 3 to 5 parts of high ash natural rock asphalt into the heated coarse and fine aggregate mixture, and drily mixing for 15-20s; 3), heating 3 to 5 parts of SBS modified asphalt to 160 DEG C-170 DEG C, spraying the heated SBS modified asphalt into the mixture of the step 2), and wetly mixing for 40-45s; and 4), adding 7-10 parts of ore powder into the mixture of the step 3), and stirring uniformly to obtain the desired product. Through mixing of the gap-graded ore material, the high ash natural rock asphalt and the SBS modified asphalt and high ash natural rock asphalt and SBS compound modification, ductility reduction caused by rock asphalt modification can be compensated, the SBS modified asphalt dosage can be reduced, environment pollution of the mixture production process can be reduced, and the cost is saved.

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