自研环保无机硅胶温拌剂的综合性能鉴评
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国家自然科学基金面上项目(51778541),中央高校基本科研业务费专项资金(2682019ZT05)


Comprehensive Performance Evaluation of a Novel Self developed Inorganic Silica Gel Warm Mix Additive
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    摘要:

    研发了一种应用于寒冷低温地区以无机硅胶作为主要成分的新型温拌剂Siligate.为探明该温拌剂对沥青性能的影响,选用苯乙烯丁二烯苯乙烯嵌段共聚物(SBS)改性沥青,并引入中国应用较广的2种温拌剂Sasobit与Evotherm M1进行对比,采用旋转平板黏度试验、双边缺口拉伸试验、低温临界开裂温度(Tcr)计算、环境排放物定量测试,对温拌剂的降黏、抗疲劳改性、抗低温开裂改性、减排效果展开分析.结果表明:6%的Siligate、3%的Sasobit和08%的Evotherm M1具备相似的降温效果,均降低拌和温度13℃,降低压实温度14℃;以上述掺量作为对比基准,Siligate可使沥青胶结料的低温临界开裂温度Tcr显著降低,起到优化低温抗裂性能的作用,这是传统温拌剂所不具备的;Siligate还起到了改善沥青抗疲劳性能,降低碳基化合物排放的效果.

    Abstract:

    A novel warm mix additive Siligate with inorganic silica gel as the main ingredient was developed specifically for cold areas. In order to investigate the influence of this warm mix additive on asphalts, styrene butadiene styrene triblock copolymer(SBS) modified asphalt was selected as the test asphalt. Two kinds of warm mix additives that have been widely used in China, Sasobit and Evotherm M1, were used as the comparison. Rotational plate viscosity test, double edge notched tension test, calculation of critical cracking temperature at low temperature(Tcr), quantitative test of characteristic environmental emissions were respectively used to test the changes of construction temperature, fatigue resistance, low temperature crack resistance and characteristic emissions during mix of SBS modified asphalt. The results show that 6% Siligate, 3% Sasobit and 08% Evotherm M1have similar effect in construction temperature decreasing, which can effectively reduce the mixing temperature of asphalt by 13℃ and the compaction temperature by 14℃. Based on above dosage, Siligate can significantly reduce the critical cracking temperature at low temperature(Tcr) and optimize the low temperature performance of asphalt, which are not available in traditional products. In addition, Siligate can also improve the fatigue resistance of asphalt and significantly reduce the emissions of carbon based compounds.

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罗浩原,邱延峻,赵碧云,苏婷,郑鹏飞.自研环保无机硅胶温拌剂的综合性能鉴评[J].建筑材料学报,2021,24(1):153-160

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  • 收稿日期:2019-08-14
  • 最后修改日期:2019-09-29
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  • 在线发布日期: 2021-03-09
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