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In order to investigate the aging mechanism of high dosage rubber powder modified asphalt, with the help of 20%, 25% and 30% of three different dosages of rubber asphalt, using four-component analysis experiment and infrared spectroscopy experiment, evaluation of aging rubber asphalt four-component indexes change, and analyze the chemical composition and functional group changes before and after aging, through the comparative study, to reveal high dosage rubber powder modified asphalt aging mechanism under different aging conditions. The aging mechanism of high doped rubber powder modified asphalt under different aging conditions was revealed through comparative study. The results show that: the aging of high dosage rubber powder modified asphalt components more significant. 20% dosage, the saturation fraction, aromatic fraction and gum decreased by 4.4%, 3.4%, 4.3%, respectively, asphaltene increased by 117.7%; 25% dosage of rubber asphalt saturation fraction decreased by 5.0%, the aromatic fraction decreased by 8.4%, gum decreased by 4.9%, asphaltene increased by 119.3%, and 30% dosage, the decrease is greater, respectively, 7.4%, 9.5%, 6.0%, asphaltene increased to 128.9%; aging process, high dosage of rubber powder modified asphalt has less mass loss, the combination of light components of the asphalt and cracked rubber binding reduces the light component activity and enhances the resistance to aging; high dosage of modified asphalt in the aging conditions of carbonyl and sulfoxide group index growth is more significant, which may lead to a decline in the performance of the The compatibility of rubber and asphalt is more susceptible to aging, which is manifested by more intense vulcanization phenomena and changes in molecular chain cross-linking. The research results provide theoretical support for the aging mechanism of rubber asphalt, and for the practical application and maintenance of high dosage of rubber powder asphalt pavement, which is of great significance to improve the performance of rubber asphalt pavement.
, correspAuthors=San-qiang YANG, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=San-qiang YANG, Yi-song GAO, Qi LIU, Cheng-wang LI, Na LIU), CN=ArticleExt(id=1149768954425557206, articleId=1149768943809773691, tenantId=1146029695717560320, journalId=1146123166801305609, language=CN, title=高掺量胶粉改性沥青老化作用机理, columnId=1156262730664366426, journalTitle=科学技术与工程, columnName=论文·交通运输, runingTitle=null, highlight=null, articleAbstract=
为了探究高掺量胶粉改性沥青的老化作用机理,借助20%、25%和30%三种不同掺量的橡胶沥青,采用四组分分析实验和红外光谱实验,评价老化橡胶沥青的四组分指标变化,并分析老化前后的化学组成和官能团变化,通过对比研究,揭示高掺量胶粉改性沥青在不同老化条件下的老化机理。结果表明:老化对高掺量胶粉改性沥青的组分影响更显著。20%掺量时,饱和分、芳香分和胶质分别降4.4%、3.4%、4.3%,沥青质增117.7%;25%掺量橡胶沥青饱和分下降5.0%、芳香分下降8.4%、胶质下降4.9%、沥青质增加119.3%,30%掺量时,降幅更大,分别为7.4%、9.5%、6.0%,沥青质增至128.9%;老化过程中,高掺量胶粉改性沥青的质量损失较小,沥青中轻质组分结合与裂解橡胶结合减少了轻质组分活性并增强了抗老化性;高掺量改性沥青在老化条件下羰基与亚砜基指数增长更显著,可能导致性能下降,其橡胶与沥青的相容性在老化中更易受影响,表现为更剧烈的硫化现象和分子链交联的变化。研究成果为橡胶沥青老化作用机理提供了理论支撑,并为高掺量胶粉沥青路面的实际应用与养护提供了借鉴,对提升橡胶沥青路面性能具有重要意义。
, correspAuthors=杨三强, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=JulsfokquG+2r8nUzyNB0g==, magXml=vXfMmRnsTEx2+vcN8in98A==, pdfUrl=null, pdf=mOOTaMzpBHwPXeR+F6LY8g==, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=smEZ4PCZPNuBdb0hsfYtTA==, mapNumber=null, authorCompany=null, fund=null, authors=
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杨三强(1980—),男,汉族,四川绵阳人,博士后,教授。研究方向:公路工程、路基路面工程。E-mail:ysq0999@163.com。
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杨三强(1980—),男,汉族,四川绵阳人,博士后,教授。研究方向:公路工程、路基路面工程。E-mail:ysq0999@163.com。
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Ni Bin.
Research on aging and regeneration mechanism of rubber asphalt with large rubber powder doping[D]. Nanjing: Southeast University,
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Variation of four components at different doping aging stage, figureFileSmall=zT7hK/6LZkYRgd+K+41paw==, figureFileBig=B6DQIudUBZ2XYI3Hqow6XQ==, tableContent=null), ArticleFig(id=1172930783611338915, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=CN, label=图1, caption=
不同掺量老化阶段的四组分变化, figureFileSmall=zT7hK/6LZkYRgd+K+41paw==, figureFileBig=B6DQIudUBZ2XYI3Hqow6XQ==, tableContent=null), ArticleFig(id=1172930783678447780, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=EN, label=Fig.2, caption=
Fourier infrared spectra of different blended rubberized asphalt before and after aging, figureFileSmall=+jaTYmFThyfRReTlMN7o/g==, figureFileBig=kjF0ptyRYCgZXUJWUtl0Hg==, tableContent=null), ArticleFig(id=1172930783737168037, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=CN, label=图2, caption=
老化前后不同掺量橡胶沥青的傅里叶红外光谱, figureFileSmall=+jaTYmFThyfRReTlMN7o/g==, figureFileBig=kjF0ptyRYCgZXUJWUtl0Hg==, tableContent=null), ArticleFig(id=1172930783804276902, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=EN, label=Fig.3, caption=
Changes in carbonyl and sulfoxide indices of 20%、25% and 30% blended rubber asphalt before and after aging, figureFileSmall=S4OqHa2HGRQJxwPKuLwwcw==, figureFileBig=CAN9pQuzeJ5fMW49uPV2XQ==, tableContent=null), ArticleFig(id=1172930783896551591, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=CN, label=图3, caption=
老化前后20%、25%、30%掺量橡胶沥青的羰基、亚砜基指数变化, figureFileSmall=S4OqHa2HGRQJxwPKuLwwcw==, figureFileBig=CAN9pQuzeJ5fMW49uPV2XQ==, tableContent=null), ArticleFig(id=1172930783959466152, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=EN, label=Table 1, caption=
Four-component content of matrix asphalt
, figureFileSmall=null, figureFileBig=null, tableContent=
| 组分名称 | 质量百分含量/% |
| 饱和分 | 24.5±1.2 |
| 芳香分 | 48.5±2.5 |
| 胶质 | 15.2±0.8 |
| 沥青质 | 11.8±0.6 |
), ArticleFig(id=1172930784022380713, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=CN, label=表1, caption=
基质沥青四组分含量
, figureFileSmall=null, figureFileBig=null, tableContent=
| 组分名称 | 质量百分含量/% |
| 饱和分 | 24.5±1.2 |
| 芳香分 | 48.5±2.5 |
| 胶质 | 15.2±0.8 |
| 沥青质 | 11.8±0.6 |
), ArticleFig(id=1172930784089489578, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=EN, label=Table 2, caption=
30 mesh rubber powder component content
, figureFileSmall=null, figureFileBig=null, tableContent=
| 组分名称 | 质量百分含量/% |
| 挥发性组分 | 4.81±1.0 |
| 总有机物 | 54.57±1.5 |
| 丙酮提取物 | 5.07±0.5 |
| 橡胶烃 | 48.90±0.6 |
| 炭黑 | 33.75±0.3 |
| 灰分 | 6.87±0.5 |
), ArticleFig(id=1172930784156598443, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=CN, label=表2, caption=
30目橡胶粉组分含量
, figureFileSmall=null, figureFileBig=null, tableContent=
| 组分名称 | 质量百分含量/% |
| 挥发性组分 | 4.81±1.0 |
| 总有机物 | 54.57±1.5 |
| 丙酮提取物 | 5.07±0.5 |
| 橡胶烃 | 48.90±0.6 |
| 炭黑 | 33.75±0.3 |
| 灰分 | 6.87±0.5 |
), ArticleFig(id=1172930784223707308, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=EN, label=Table 3, caption=
List of orthogonal test program designs
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试验组号 | 胶粉掺量A | 老化阶段B |
| 1 | A1 20% | B1 未老化 |
| 2 | A1 20% | B2 短期老化 |
| 3 | A1 20% | B3 长期老化 |
| 4 | A2 25% | B1 未老化 |
| 5 | A2 25% | B2 短期老化 |
| 6 | A2 25% | B3 长期老化 |
| 7 | A3 30% | B1 未老化 |
| 8 | A3 30% | B2 短期老化 |
| 9 | A3 30% | B3 长期老化 |
), ArticleFig(id=1172930784290816173, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=CN, label=表3, caption=
正交试验方案设计一览表
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试验组号 | 胶粉掺量A | 老化阶段B |
| 1 | A1 20% | B1 未老化 |
| 2 | A1 20% | B2 短期老化 |
| 3 | A1 20% | B3 长期老化 |
| 4 | A2 25% | B1 未老化 |
| 5 | A2 25% | B2 短期老化 |
| 6 | A2 25% | B3 长期老化 |
| 7 | A3 30% | B1 未老化 |
| 8 | A3 30% | B2 短期老化 |
| 9 | A3 30% | B3 长期老化 |
), ArticleFig(id=1172930784353730734, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=EN, label=Table 4, caption=
Changes in the four components of rubberized asphalt in different aging states
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试样 | 老化阶段 | 饱和分/% | 沥青质/% | 胶质/% | 芳香分/% |
20%掺量 橡胶沥青 | 未老化 | 36.62 | 3.15 | 28.12 | 32.11 |
| 短期老化 | 35.10 | 5.38 | 27.95 | 31.57 |
| 长期老化 | 35.01 | 6.86 | 26.91 | 31.02 |
25%掺量 橡胶沥青 | 未老化 | 30.21 | 3.53 | 32.16 | 34.10 |
| 短期老化 | 29.58 | 6.53 | 31.18 | 32.31 |
| 长期老化 | 28.72 | 7.74 | 31.02 | 31.22 |
30%掺量 橡胶沥青 | 未老化 | 26.57 | 4.08 | 36.91 | 32.44 |
| 短期老化 | 25.98 | 7.85 | 35.12 | 31.05 |
| 长期老化 | 24.61 | 9.34 | 34.70 | 29.36 |
), ArticleFig(id=1172930784441811119, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=CN, label=表4, caption=
不同老化状态下橡胶沥青的四组分变化
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试样 | 老化阶段 | 饱和分/% | 沥青质/% | 胶质/% | 芳香分/% |
20%掺量 橡胶沥青 | 未老化 | 36.62 | 3.15 | 28.12 | 32.11 |
| 短期老化 | 35.10 | 5.38 | 27.95 | 31.57 |
| 长期老化 | 35.01 | 6.86 | 26.91 | 31.02 |
25%掺量 橡胶沥青 | 未老化 | 30.21 | 3.53 | 32.16 | 34.10 |
| 短期老化 | 29.58 | 6.53 | 31.18 | 32.31 |
| 长期老化 | 28.72 | 7.74 | 31.02 | 31.22 |
30%掺量 橡胶沥青 | 未老化 | 26.57 | 4.08 | 36.91 | 32.44 |
| 短期老化 | 25.98 | 7.85 | 35.12 | 31.05 |
| 长期老化 | 24.61 | 9.34 | 34.70 | 29.36 |
), ArticleFig(id=1172930784508919984, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=EN, label=Table 5, caption=
Aging test mass loss values
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试样 | 老化阶段 | 质量/g | 质量损失/g |
20%掺量 橡胶沥青 | 未老化 | 50.00 | — |
| 短期老化 | 49.63 | 0.37 |
| 长期老化 | 49.15 | 0.85 |
25%掺量 橡胶沥青 | 未老化 | 50.00 | — |
| 短期老化 | 49.70 | 0.30 |
| 长期老化 | 49.36 | 0.64 |
30%掺量 橡胶沥青 | 未老化 | 50.00 | — |
| 短期老化 | 49.86 | 0.14 |
| 长期老化 | 49.71 | 0.29 |
), ArticleFig(id=1172930784584417457, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=CN, label=表5, caption=
老化试验质量损失值
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试样 | 老化阶段 | 质量/g | 质量损失/g |
20%掺量 橡胶沥青 | 未老化 | 50.00 | — |
| 短期老化 | 49.63 | 0.37 |
| 长期老化 | 49.15 | 0.85 |
25%掺量 橡胶沥青 | 未老化 | 50.00 | — |
| 短期老化 | 49.70 | 0.30 |
| 长期老化 | 49.36 | 0.64 |
30%掺量 橡胶沥青 | 未老化 | 50.00 | — |
| 短期老化 | 49.86 | 0.14 |
| 长期老化 | 49.71 | 0.29 |
), ArticleFig(id=1172930784647332018, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=EN, label=Table 6, caption=
Carbonyl and sulfoxide indices of rubber asphalt before and after aging
, figureFileSmall=null, figureFileBig=null, tableContent=
| 老化阶段 | 基因指数 |
| 羰基(AC=O) | 亚砜基(AS=O) |
20%掺量 橡胶沥青 | 未老化 | 0.812 | 1.284 |
| 短期老化 | 0.951 | 2.516 |
| 长期老化 | 1.264 | 4.061 |
25%掺量 橡胶沥青 | 未老化 | 0.861 | 1.536 |
| 短期老化 | 1.064 | 3.101 |
| 长期老化 | 1.402 | 5.574 |
30%掺量 橡胶沥青 | 未老化 | 0.923 | 1.985 |
| 短期老化 | 1.196 | 3.532 |
| 长期老化 | 1.665 | 6.843 |
), ArticleFig(id=1172930784752189619, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768943809773691, language=CN, label=表6, caption=
老化前后橡胶沥青的羰基和亚砜基指数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 老化阶段 | 基因指数 |
| 羰基(AC=O) | 亚砜基(AS=O) |
20%掺量 橡胶沥青 | 未老化 | 0.812 | 1.284 |
| 短期老化 | 0.951 | 2.516 |
| 长期老化 | 1.264 | 4.061 |
25%掺量 橡胶沥青 | 未老化 | 0.861 | 1.536 |
| 短期老化 | 1.064 | 3.101 |
| 长期老化 | 1.402 | 5.574 |
30%掺量 橡胶沥青 | 未老化 | 0.923 | 1.985 |
| 短期老化 | 1.196 | 3.532 |
| 长期老化 | 1.665 | 6.843 |
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