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李伟,欧阳春发,吴修春,等. 复合高胶水性沥青的制备及其混合料应用研究[J]. 应用技术学报,2021,21(1):30-36. DOI: 10.3969/j.issn.2096-3424.20085
引用本文: 李伟,欧阳春发,吴修春,等. 复合高胶水性沥青的制备及其混合料应用研究[J]. 应用技术学报,2021,21(1):30-36. DOI: 10.3969/j.issn.2096-3424.20085
LI Wei, OUYANG Chunfa, WU Xiuchun, LUO Wei, GUO Dong, WEI Jiajun, GAO Qun, SHAN Xiaoqian, SHI Yutao, ZHENG Kangsheng. Study on Preparation of High Rubber Composite Emulsified Asphalt and Its Mixture Application[J]. Journal of Technology, 2021, 21(1): 30-36. DOI: 10.3969/j.issn.2096-3424.20085
Citation: LI Wei, OUYANG Chunfa, WU Xiuchun, LUO Wei, GUO Dong, WEI Jiajun, GAO Qun, SHAN Xiaoqian, SHI Yutao, ZHENG Kangsheng. Study on Preparation of High Rubber Composite Emulsified Asphalt and Its Mixture Application[J]. Journal of Technology, 2021, 21(1): 30-36. DOI: 10.3969/j.issn.2096-3424.20085

复合高胶水性沥青的制备及其混合料应用研究

Study on Preparation of High Rubber Composite Emulsified Asphalt and Its Mixture Application

  • 摘要: 废胶粉可改善沥青的高低温性能,但经传统热拌工艺改性的沥青,因其性能不稳定和气味问题而被限制广泛应用。传统乳化沥青混合料黏结性差、高温强度低、抗水损害能力差,且存在拌和施工可操作性差等问题。将苯乙烯-丁二烯-苯乙烯共聚物复合废胶粉(复合高胶)改性沥青水性化,并将其应用于OGFC-13级配透水路面铺设。制备出复合高胶水性沥青,并对其软化点、黏度、力学性能及微观形貌进行分析。研究了OGFC-13型混合料高低温性能以及水稳定性能。测试结果表明:采用非离子型乳化剂,乳化时间15 min制备出的乳化沥青黏结性好,软化点高,分散均匀且具有良好的力学性能。混合料性能测试表明,当油石比为6.5%时,复合高胶水性沥青混合料表现出良好的高低温性能,动稳定度达到5842次/mm,弯曲破坏应变达到3024 μm/m、破坏最大荷载为1256 N,冻融劈裂强度比达到80.2%,具有良好的抗水损害能力。研究结果有助于废胶粉的环保资源化综合利用,并将促进水性沥青高值化应用,在道路铺设、养护、建筑防水等领域应用前景广阔。

     

    Abstract: Waste rubber powder can improve the high and low temperature performance of asphalt, but with the traditional hot mixing process, the wide application of modified asphalt is restricted due to its unstable performance and odor problems. The traditional emulsified asphalt mixtures have poor cohesiveness, low high-temperature strength, poor resistance to water damage, and have problems with the operability of mixing construction. The styrene-butadiene-styrene copolymer composited with waste rubber powder (composite with high content of rubber, CHR) modified asphalt was hydrated and applied to OGFC-13 graded permeable pavement. Firstly, a composite high latex emulsified asphalt was prepared, and its softening point, viscosity, mechanical properties and micro morphology were analyzed. The high and low temperature performance and water stability performance of OGFC-13 mixture were studied. The test results show that the emulsified asphalt prepared with a non-ionic emulsifier and an emulsification time of 15 minutes has good cohesiveness, high softening point, uniform dispersion and good mechanical properties. The performance test of the mixture shows that when the ratio of asphalt to stone is 6.5%, the CHR emulsified asphalt mixture exhibits good high and low temperature performance, the dynamic stability reaches 5842 times·mm–1, the bending failure strain reaches 3024 μm/m, and the maximum failure load is 1256 N, the freeze-thaw splitting strength ratio reaches 80.2%, and it has good resistance to water damage. The research results are beneficial to the comprehensive utilization of waste rubber powder in environmental protection and resources, and will promote the high-value application of waterborne asphalt, which has broad application prospects in road paving, maintenance, and building waterproofing.

     

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