SBS改性沥青基吸水膨胀防水材料的研制

PREPARATION OF WATER SWELLING MATERIAL BASED ON MODIFIED ASPHALT WITH STYRENE-BUTADIENE-STYRENE INTERPOLYMER

以改性沥青 (沥青、SBS、基础油的质量比为 1 0 0∶1 4∶6)为基质 ,加入吸水物质A或吸水物质B ,混合均匀后制成吸水膨胀型防水材料。实验结果表明 ,以此改性沥青为基质的材料具有好的形状保持能力和耐热能力。当A物质与改性沥青的质量比由 0 .67增加到 1 .50时 ,所研制的材料不具有吸水膨胀性能 ;当B物质与改性沥青的质量比为 0 .0 5～ 0 .1 1时 ,所研制的材料的吸水能力适中 ,具有好的吸水性能 ;当B物质与改性沥青的质量比为 0 .0 5及A物质与改性沥青的质量比为 0 .1 5～ 0 .30时 ,所研制的材料吸水能力适中 ,性能优良 ,可用作吸水膨胀材料。材料的吸水膨胀能力随着B物质含量的增加而增大。随着A物质含量的增加 ,吸水膨胀材料的断裂延伸值、弹性恢复率都有减小的趋势。当B物质与改性沥青的质量比小于 0 .2 5时 ,B物质的加入对改性沥青的断裂延伸值和弹性恢复率影响不大。

A new type of water swelling material can be prepared by adding a water absorbent A and a super water absorbed resin B into a styrene butadiene styrene (SBS) modified asphalt which contains asphalt of 100, SBS of 14 and base oil of 6 in mass fractions. The experimental results showed that the material made from this type of modified asphalt has the excellent shape retain ability and heat resistance. However the material has no water swelling ability when the content of A substance in the modified asphalt increases from 0.67 to 1.50. When the content of B substance increases from 0 05 to 0.11, this kind of material has moderate water swelling ability and excellent water preventing performance. The material has the same excellent performance and can be used as water swelling material when the content of B substance is 0 05 and that of A substance is from 0.15 to 0.30. The water swelling ability of the material increases with increasing content of B substance. However the material has no water swelling ability when the content of A substance increases from 0.67 to 1.50. With increasing content of A substance, the elongation rate at break point and elastic recovery of the material has a tendency to reduce. When the content of B substance is lower than 0.25, addition of B substance has slight influence on the elongation at break and elastic recovery of modified asphalt. The effect of combining A and B is better than that of A or B used alone.