31 7 2014 7 Journal of Highway and Transportation Research and Development Vol. 31 No. 7 Jul. 2014 doi 10. 3969 /j. issn. 1002-0268. 2014. 07. 007 1 2 1 1 1. 410004 2. 314001 2 3 2 /sin δ 1. 2 U416. 217 A 1002-0268 2014 07-0039 - 06 Research on Character of Ash in Trinidad Lake Asphalt LI Ping 1 JI Wen-guang 2 ZHA Xu-dong 1 ZENG Wang-qiu 1 1. School of Traffic and Transportation Engineering Changsha University of Science and Technology Changsha Hunan 410004 China 2. Jiaxing Traffic Engineering Quality and Safety Supervision Station Jiaxing Zhejiang 314001 China Abstract In order to understand the modification mechanism of Trinidad Lake asphalt the microscopic property test the technical index analysis of the isolated ash and the research of its interaction with asphalt are conducted and compared with those of 2 kinds of mineral powder. Based on comparing the separation effect and operational feasibility of 3 kinds of ash it is suggested to use the method of using centrifuge to separate ash. Through the test of microscopic particle morphology and crystal composition is found that the size of ash granule is small and the surface structure is rough and the ash is mainly composed of quartz and clay. The result of technical index analysis shows that ash possesses larger density finer granularity and large specific surface area. The test result of /sin δ of mortar made of ash and 2 kinds of filler shows that ash reinforcement stiffness is better than that of powder when the ash-binder ratio surpasses 1. 2 the growing rate is large than that of ordinary powder. So the ash could make high temperature performance of asphalt stronger for its little granule size large and rough surface. Key words road engineering Trinidad Lake asphalt ash character 0 20 2013-08 - 12 51078045 kfi130401 2012GXNSFBA053158 2013gxjgclkf-002 1978 -. lipingchd@ 126. com
40 31 25 min 3 TLA 1-3 TLA 2 1. 3% SBS TLA 4-7 TLA TLA 1 /3 TLA TLA 1 1 Fig. 1 Centrifugal machine TLA TLA 8 1 TLA TLA 2 Fig. 2 Rotatory evaporator 10% 2 2 0. 1 μm 2. 1 TLA 3 TLA KYKY2000 1 4 000 r /min 15 cm 3 3 ~ 105 5
7 41 3 1 Fig. 3 SEM pictures of mineral powder 1 4 2 Fig. 4 SEM pictures of mineral powder 2 Fig. 5 5 SEM pictures of ash 3 ~ 5 2 XRD 6 1 2 2 CaCO 3 MgCO 3 Mg 3 Ca CO 3 4 Mg 3 Ca SiO 4 2 2 2. 2 X 3 Rigaku D /Max2200X 3. 1
42 31 Fig. 6 6 Diffraction pattern 1 2 1 Tab. 1 g cm - 3 Density of each filler unit g cm - 3 1 2 3. 10 2. 78 2. 81 2 7 9 2 Tab. 2 1 Analysis parameters of granularity of specimens δ P 10 / 1 δ 2 % 2 1 2 1 2 P 30 / % P 60 / % 2. 93 2. 94 1. 15 1. 63 2. 01 70. 21 99. 98 100 1 3. 93 6. 52 1. 25 2. 35 3. 49 37. 12 80. 21 76. 1 2 2 5. 25 6. 71 1. 28 2. 34 3. 55 18. 2 50. 23 77. 83 2 0. 01 0. 03 mm 0. 06 mm 3 3. 2 3 2 4 δ 1 δ 2 7 2 3. 3 10 BET BET Fig. 7 Sieve residue curves of specimens NOVA2000e 2 3 40 μm 2 100 μm 2 2 3 1 Tab. 3 Specific surface areas of specimens 1 2 / 10 4 cm 2 g - 1 16. 24 1. 72 1. 71 / 10 4 cm 2 g - 1 1. 14 1. 14 0. 61
7 43 11-12 2 2 9. 5 2 1 2 3 2 /sinδ 2 /sinδ 8 4 70 # 2 TLA 2 /sin δ DSR 0. 12 kpa 10 rad /s 4 4 /sin δ /sinδ Tab. 4 4 / f /a DSR DSR test result of asphalt mortar /kpa 1 2 8 /sin δ Fig. 8 /sin δ curves of mortar 3 /sin δ 9 0. 6 5. 07 2. 91 3. 51 64 0. 9 10. 20 4. 60 3. 99 1. 2 11. 20 6. 09 5. 80 1. 5 30. 40 8. 40 7. 00 0. 6 3. 17 1. 53 1. 72 70 0. 9 6. 04 2. 19 2. 26 1. 2 7. 25 2. 31 2. 56 9 /sin δ 1. 5 15. 20 3. 59 3. 15 Fig. 9 /sin δ curves of mortar in different F /As 0. 6 2. 37 0. 95 1. 23 5 3 /sin δ 0. 9 4. 21 1. 08 2. 31 74 1. 2 1. 2 4. 88 2. 14 2. 79 1. 5 10. 60 2. 70 2. 97 1. 2 /sin δ 4 1 2 /sin δ 2 2 4
44 31 5 1 6 RUSSELL S N MAHARAJ R GEORGE A S. End-of-life 3 Management of Scrap Tyres Using Crumb Rubber Modified TLA TLA International J. Journal of Applied Environmental Sciences 2011 6 1 91-102. 7. 2 X 2009 26 8 28-2 32. GAO Yan-xi ZENG Hong-xiong ZHANG Dong-sheng. Research on Influencing Factors on Asphalt Mixture Shear 3 Strength J. Journal of Highway and Transportation Research and Development 2009 26 8 28-32. 8. 2 10 J. 2010 4 27 9 23-27 43. GENG Jiu-guang DAI Jing-liang YUAN Jian-an. Analysis of Sedimentation Theory and Elimination Method /sin δ of Residual Filler in Extraction of Asphalt Cement J. 3 /sin δ 1. 2 Journal of Highway and Transportation Research and Development 2010 27 9 23-27 43. References 1. 5 28-32. 2013 2 12-19. L De-bao LIU Han-bing GUAN Chang-lu. Study on FENG Xin-jun ZHA Xu-dong FENG Zhi-jun et al. Ascertaining Specific Surface Area of Asphalt Mixture Study on Application Technology of Trinidad Lake Asphalt Aggregate J. Journal of Highway and Transportation J. Guangdong Highway Communications 2013 2 12-19. 2. TLA AC - 16C 2011 3 38-42. LIANG Yong-yi. Design of Mixing Ratio of TLA Modified Asphalt Mixture AC - 16C J. Technology of Highway 11. and Transport 2011 3 38-42. 2005 22 2 10-13. 3. TLA SHAO Xian-zhi TAN Yi-qiu SUN Li-jun. Analysis on J. 2012 34 2 the Relationship between Several Indexes of Mineral Filler Pavement in Expressway J. Petroleum Asphalt 2010 24 4 16-19. 5 YILMAZ M ELOG LU M E. Effects of SBS and Different Natural Asphalts on the Properties of Bituminous Binders and Mixtures J. Construction and Building Materials 2013 44 533-540. 9. J. 2011 28 Research and Development 2011 28 5 28-32. 10. D. 2007. LI Ping. Design of Asphalt Mixture Based on Mortar Character D. Xi'an Chang'an University 2007. 45-48. and Asphalt Mortar J. Journal of Highway and YANG E ZHANG Xiao-ning. Research on TLA Modified Asphalt Dynamic Shear Modulus and Its Master Curves Transportation 2 10-13. Research and Development 2005 22 J. Journal of Wuhan University of Technology 2012 34 2 45-48. 12. 2007 4. TLA 28 3 40-42. J. 2010 24 4 16-19. LI Ping SUN Hong-wei ZHANG Zheng-qi et al. The WU Ning. Experiment Research on TLA Modified Asphalt Influence of Cement and Hydrated Lime on the Performance of Asphalt Mortar J. Journal of Zhengzhou University Engineering Science Edition 2007 28 3 40-42.