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PDF全文閱讀
胡文娟
(鄭州市公路工程公司,河南 鄭州 450000)
摘 要:為了改善熱再生瀝青混合料的路用性能及耐久性,首先采用TLA與聚酯纖維進(jìn)行復(fù)配設(shè)計(jì),然后基于馬歇爾、高溫車轍、低溫彎曲、浸水馬歇爾、凍融劈裂、兩點(diǎn)彎曲與浸水APA等試驗(yàn),針對(duì)TLA與聚酯纖維復(fù)合改性熱再生瀝青混合料的高溫穩(wěn)定性、低溫抗裂性、水穩(wěn)定性、抗疲勞耐久性能展開(kāi)綜合考察。結(jié)果表明:?jiǎn)螕絋LA或聚酯纖維均能改善熱再生瀝青混合料的高溫穩(wěn)定性能、低溫抗裂性能及水穩(wěn)定性,且TLA的各項(xiàng)性能改善效果相對(duì)較為明顯;經(jīng)復(fù)摻TLA與聚酯纖維改性后熱再生瀝青混合料的路用性能均得到顯著的提升,可適用于我國(guó)北方嚴(yán)寒或南方高溫濕熱多雨等復(fù)雜氣候地區(qū)的瀝青路面建設(shè)之中;TLA能夠有效提高熱再生瀝青混合料的勁度模量與疲勞壽命,合理復(fù)摻聚酯纖維后提升效果更為明顯,均符合高模量瀝青混合料的規(guī)定及要求;采用合理比例的TLA與聚酯纖維進(jìn)行復(fù)摻,可綜合提升熱再生瀝青混合料的路用性能及耐久性。
關(guān)鍵詞:聚酯纖維;熱再生瀝青混合料;TLA;路用性能;耐久性
中圖分類號(hào):U414
文獻(xiàn)標(biāo)志碼:A
文章編號(hào):1005-8249(2024)01-0022-06
DOI:10.19860/j.cnki.issn1005-8249.2024.01.005
HU Wenjuan
(1.Zhengzhou Highway Engineering Company, Zhengzhou 450000, China)
Abstract:In order to improve the road performance and durability of hot recycled asphalt mixture, TLA and polyester fiber are first used for composite design, and then based on Marshall, high-temperature rutting, low-temperature bending, soaking Marshall, freeze-thaw splitting, two-point bending and soaking APA tests,The high-temperature stability, low-temperature crack resistance, water stability and fatigue endurance of TLA and polyester fiber composite modified hot recycled asphalt mixture were comprehensively investigated. The results show that both TLA and polyester fiber can improve the high-temperature stability, low-temperature crack resistance and water stability of hot recycled asphalt mixture, and the improvement effect of TLA is relatively obvious; The road performance of the hot recycled asphalt mixture modified by TLA and polyester fiber has been significantly improved, and it can be applied to the construction of asphalt pavement in the severe cold in the north of China or the high temperature, humid and rainy areas in the south; TLA can effectively improve the stiffness modulus and fatigue life of hot recycled asphalt mixture, and the improvement effect is more obvious after reasonable mixing of polyester fiber, which meets the regulations and requirements of high modulus asphalt mixture; The road performance and durability of hot recycled asphalt mixture can be comprehensively improved by using a reasonable proportion of TLA and polyester fiber.
Keywords: polyester fiber;hot recycled asphalt mixture;TLA;road performance;durability
作者簡(jiǎn)介:胡文娟(1978—),女,本科,高級(jí)工程師,主要研究方向:土木工程相關(guān)工作。
收稿日期:2023-10-29
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