首页|煤直接液化残渣复合改性沥青胶浆的流变特性

煤直接液化残渣复合改性沥青胶浆的流变特性

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为探究煤直接液化残渣(DCLR)复合改性沥青胶浆的流变特性,针对3种沥青胶浆(DCLR复合改性沥青胶浆、DCLR改性沥青胶浆和SK-90沥青胶浆)设计了4种粉胶比.采用动态剪切流变(DSR)试验、弯曲梁流变(BBR)试验、差示扫描量热(DSC)试验和扫描电镜(SEM)试验对沥青胶浆的流变特性进行探究.结果表明:DCLR复合改性沥青胶浆的耐热性较好,热稳定性较强,高温抗流动变形能力显著强于SK-90沥青胶浆;DCLR复合改性沥青胶浆的温度敏感性显著下降,低温流变性显著强于DCLR改性沥青胶浆;相比SK-90沥青胶浆和DCLR改性沥青胶浆,DCLR复合改性沥青胶浆的综合高低温性能最优.
Rheological Properties of Direct Coal Liquefaction Residue Composite Modified Asphalt Mortar
In order to investigate the rheological properties of direct coal liquefaction residue(DCLR)composite modified asphalt mortar,four filler-bitumen ratios were designed for three types of asphalt mortars(DCLR composite modified asphalt mortar,DCLR modified asphalt mortar and SK-90 asphalt mortar).Dynamic shear rheology(DSR)test,bending beam rheology(BBR)test,differential scanning calorimetry(DSC)test,and scanning electron microscopy(SEM)test were used to investigate the rheological properties of the mortars.The results show that DCLR composite modified asphalt mortar has better heat resistance,stronger thermal stability,and the high temperature resistance to flow deformation is significantly stronger than SK-90 asphalt mortar.The temperature sensitivity of DCLR composite modified asphalt mortar is significantly reduced and its low temperature rheology is significantly better than that of the DCLR modified asphalt mortar.Compared to SK-90 asphalt mortar and DCLR modified asphalt mortar,DCLR composite modified asphalt mortar has the best overall high and low temperature performance.

road engineeringdirect coal liquefaction residue(DCLR)filler-bitumen ratioasphalt mortarrheological propertymicroscopic mechanism

季节、张梓源、董元帅、文龙、马童

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北京建筑大学 土木与交通工程学院,北京 100044

北京建筑大学 住房城乡建设部建筑垃圾资源化工程技术创新中心,北京 100044

北京建筑大学 北京节能减排与城乡可持续发展省部共建协同创新中心,北京 100044

北京建筑大学 北京市城市交通基础设施建设工程技术研究中心,北京 100044

中咨数据有限公司 北京 100097

清华大学 土木水利学院,北京 100084

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道路工程 煤直接液化残渣 粉胶比 沥青胶浆 流变性能 微观机制

国家自然科学基金资助项目"十四五"国家重点研发计划项目北京市属高等学校高水平科研创新团队建设支持计划项目北京建筑大学研究生创新项目

520780252021YFB2601200BPHR20220109PG2024045

2024

10.3969/j.issn.1007-9629.2024.09.011

建筑材料学报
同济大学

建筑材料学报

CSTPCD北大核心
影响因子：1.046
ISSN：1007-9629
年,卷(期)：2024.27(9)
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