基于降粘与表面活性技术的温拌沥青混合料的性能研究

发布时间：2018-04-20 03:07

本文选题：热拌沥青混合料 + 温拌沥青混合料　；参考：《内蒙古工业大学》2015年硕士论文

【摘要】：传统的热拌沥青混合料HMA已被广泛应用于道路工程的建设中,由于其较高的施工温度,在施工过程中会释放出大量的粉尘及CO2等有害气体,对环境造成污染,危害施工人员的身体健康。温拌沥青混合料WMA,是通过在沥青混合料中添加温拌剂,以实现降低混合料的拌合与压实温度为目的,但又不损失路用性能的一种新型的道路建筑材料。由于温拌沥青混合料的施工温度相对较低,所以可以减少大量有害气体的排放,具有良好的环保效果。本文的研究在于给中西部地区温拌沥青混合料的施工提供一定的理论指导,并推荐适合中西部地区的温拌剂。选用降粘型温拌剂RH与表面活性温拌剂JY-W1进行研究,研究结论如下:添加RH温拌剂能够有效降低SBS改性沥青的黏度,并使SBS改性沥青的软化点与当量软化点分别升高5.8%与0.6%,表明RH温拌剂提高了沥青的高温性能;同时,SBS改性沥青的延度增长52.4%,当量脆点减小4.7,表明RH温拌剂改善了沥青的低温性能。添加JY-W1温拌剂后,SBS沥青的软化点与当量软化点分别升高9.8%与2.0%,表明JY-W1温拌剂提高了沥青的高温性能;同时,SBS沥青的延度增长12.6%,当量脆点减小4.0,说明温拌剂JY-W1有利于沥青的低温性能。以马歇尔标准试件的孔隙率为控制目标,在达到与热拌沥青混凝土同等压实度的前提下,确定RH温拌沥青混合料的拌合及压实温度分别为155℃与145℃,JY-W1温拌沥青混合料的拌合与压实温度分别为152℃与142℃。与热拌SBS沥青混合料相比,添加RH与JY-W1温拌剂分别降低混合料的拌合与击实温度15℃与18℃。在确定的拌合与压实温度下,对温拌沥青混合料的高低温性能与水稳定性能进行了研究。研究结果表明,与热拌SBS沥青混合料相比,添加RH温拌剂使沥青混合料的动稳定度增长46.08%,浸水马歇尔稳定度MS0与冻融劈裂实验强度比TSR分别增长2.75%与2.87%,低温劈裂抗拉强度与最大弯曲破坏应变分别增长2.19%与60.58%,可见,RH温拌剂提高了沥青混合料的高低温性能与抗水损害能力。添加JY-W1温拌剂使沥青混合料的动稳定度增长51.41%,冻融劈裂实验强度比TSR与浸水马歇尔稳定度MS0分别减小1.41%与0.47%,低温弯曲破坏应变与劈裂抗拉强度分别增长46.44%与1.25%,说明JY-W1温拌剂提高了沥青混合料的高低温性能,对水稳定性能有负面影响。最后,对温拌沥青混合料的环保性与经济性进行了分析,结果显示,与热拌SBS沥青混合料相比,每生产1t沥青混合料,添加RH、JY-W1温拌剂可以使CO2排放量分别减少0.73kg/t与0.83kg/t,热能分别减少0.13×108J与0.16×108J,燃油成本分别降低4.71元和5.78元。同时,掺加RH与JY-W1温拌剂导致每吨沥青混合料的造价成本分别增加25.59元和33.42元。总体来说,两种温拌剂各有优缺点,二者的拌合与压实温度仅存在3℃的差值,击实效果均良好。添加RH温拌剂有利于沥青的低温性能、混合料的高低温性能以及水稳性能,而添加JY-W1温拌剂在改善沥青的高温性能、混合料的高温性能方面比较突出,但对水稳定性能有负面影响。综合比选,推荐应用RH温拌剂。
[Abstract]:The traditional hot mix asphalt mixture HMA has been widely used in the construction of road engineering. Due to its high construction temperature, a large amount of dust and CO2 and other harmful gases will be released during the construction process, causing pollution to the environment and endangering the health of the builders. The temperature mixed asphalt mixture, WMA, is added to the asphalt mixture. A new type of road building material, which is used to reduce the mixing and compacting temperature of the mixture, does not lose the road performance. Because the temperature of the mixed asphalt mixture is relatively low, it can reduce the emission of a large number of harmful gases and has good environmental protection effect. The research of this paper is given to the central and western regions. The construction of warm mix asphalt mixture provides some theoretical guidance, and recommends the warm mixing agent suitable for the central and western regions. RH and JY-W1 of surface active warm mixing agent are studied. The conclusion is as follows: adding RH warm mixing agent can effectively reduce the viscosity of SBS modified bitumen, and make the softening point and equivalent softening point of SBS modified asphalt. The increase of 5.8% and 0.6% respectively indicates that the RH warm mixing agent improves the high temperature performance of asphalt; at the same time, the ductility of SBS modified asphalt increases by 52.4% and the equivalent embrittlement point is reduced by 4.7. It indicates that the RH warm mixing agent improves the low temperature performance of asphalt. After adding JY-W1 warm mixing agent, the softening point of SBS asphalt and the equivalent softening point are 9.8% and 2% respectively, indicating that the JY-W1 warm mixing agent is improved. At the same time, the ductility of SBS asphalt increased by 12.6% and the equivalent brittleness point decreased by 4, indicating that the warm mixing agent JY-W1 was beneficial to the low temperature performance of asphalt. The porosity of the Marshall standard specimen was used as the control target and the mixing and compaction temperature of the RH warm mix asphalt mixture was determined on the basis of the same compactness as the hot mixed asphalt concrete. The mixing and compaction temperature of JY-W1 warm mix asphalt mixture at 155 and 145, respectively 152 and 142, respectively. Compared with hot mixed SBS asphalt mixture, adding RH and JY-W1 warm mixing agent to lower the mixing and compaction temperature 15 and 18 degrees, respectively, the high and low temperature properties of the mixture of warm mix asphalt under the determination of mixing and compaction temperature The results show that the dynamic stability of asphalt mixture is increased by 46.08% by adding RH warm mixture, and the experimental strength of Marshall stability MS0 and freeze-thaw splitting is increased by 2.75% and 2.87%, respectively, compared with hot mix asphalt mixture, and the tensile strength and maximum bending failure strain at low temperature are increased respectively. It can be seen that RH warm mixing agent can improve the high and low temperature performance and water resistance ability of asphalt mixture. Adding JY-W1 warm mixing agent makes the dynamic stability of asphalt mixture increase by 51.41%, the experimental strength of freeze-thaw splitting is 1.41% and 0.47%, respectively, and the Marshall stability MS0, respectively, and the fracture strain and splitting tensile strength at low temperature. The increase of 46.44% and 1.25% respectively indicates that JY-W1 warm mixing agent improves the high and low temperature performance of asphalt mixture and has a negative effect on the stability of water. Finally, the environmental protection and economy of the mixture of warm mix asphalt are analyzed. The results show that, compared with the hot mix SBS asphalt mixture, each production of 1t asphalt mixture, adding RH, JY-W1 warm mixing agent can be added. The CO2 emission is reduced by 0.73kg/t and 0.83kg/t respectively. The heat energy is reduced by 0.13 x 108J and 0.16 x 108J respectively. The fuel cost is reduced by 4.71 yuan and 5.78 yuan respectively. At the same time, the cost of each tonne of asphalt mixture is increased by 25.59 yuan and 33.42 yuan respectively by adding RH and JY-W1 warm mixing agent. In general, two kinds of warm mixing agents have their advantages and disadvantages, and two mix and mix. The compaction temperature only has the difference of 3 C, and the effect of compaction is good. Adding RH warm mixing agent is beneficial to the low temperature performance of asphalt, the high and low temperature properties of the mixture and the stability of water, while adding JY-W1 warm mixing agent to improve the high temperature performance of asphalt, the high temperature performance of the mixture is more prominent, but it has a negative effect on the stability of the water. Comprehensive comparison and selection, It is recommended to use RH warm mixing agent.

【学位授予单位】：内蒙古工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

【参考文献】