丁苯胶乳改性乳化沥青的制备及其性能

以克拉玛依90号重交通道路沥青为基质沥青，采用丁苯（SBR）胶乳为改性剂，分别筛选了三种不同种类的乳化剂及稳定剂制备SBR改性乳化沥青，对制备中影响SBR改性乳化沥青性能的因素进行了考察，并测试了SBR改性乳化沥青的存储稳定性及其它性能。结果表明，采用乳化和改性同时进行的工艺，在乳化溶液pH值为5～6、油温120℃、水温60℃的条件下，按油水质量比5：5、B乳化剂1.0%、SBR胶乳3%(干基)、氯化铵0.20%的组分质量配比制备的改性乳化沥青达到交通部JTGF40-2004的质量要求。采用复合乳化剂可节省乳化剂用量约30%。

REPARATION AND PROPERTIES OF SBR MODIFIED EMULSIFIED ASPHALT

Using Karamay 90# heavy duty road asphalt as base asphalt, SBR latex as modifier, SBR modified emulsified asphalt were prepared, meanwhile three types of emulsifiers and stabilizers were selected respectively. Factors affected the preparation of SBR modified emulsified asphalt were investigated and the storage stability of the prepared modified emulsified asphalt were studied as well. Results showed that processing emulsification and modification simultaneously, under the conditions of an emulsion pH value of 5-6, an asphalt temperature of 120℃, a water temperature of 60℃, an oil to water mass ratio of 1, a B emulsifier dosage of 1.0%, a SBR dosage of 3% (based on asphalt) and an ammonium chloride dosage of 0.2%, the qualities of the obtained product could meet the specifications of JTG F40-2004 issued by China Ministry of Communication. Further more, the dosage of emulsifier could be reduced about 30% if composite emulsifier was adopted.