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卜春鋒

（ 河南中平交科研究設(shè)計(jì)院有限公司 ，河南 平頂山 467000)

摘   要：為了研究低溫地區(qū)鋼橋面鋪裝纖維澆注式瀝青混合料的低溫抗裂性能，選用基質(zhì) 、SBS 、澆注式  及纖維澆注式瀝青混合料為研究對(duì)象 ，針對(duì)不同低溫情況下的各瀝青混合料進(jìn)行低溫小梁彎曲試驗(yàn) 、低溫彎曲蠕變?cè)囼?yàn)以及低溫劈裂試驗(yàn)，得出以下結(jié)論： ( 1)  基質(zhì) 、SBS 、澆注式及纖維澆注式瀝青混合料的勁度模量、彎曲蠕變?nèi)崃考芭褬O限應(yīng)變隨著溫度的降低均呈逐漸減小變化，而低溫劈裂強(qiáng)度則呈先增后減變化 ； ( 2)  纖維的摻入能夠明顯增強(qiáng)澆注式瀝青混合料的低溫抗裂性能，BF 纖維對(duì)澆注式瀝青混合料的低溫抗裂性能改善效  果優(yōu)于 PF 和 LF 纖維 ； (3)  纖維澆注式瀝青混合料的低溫劈裂試驗(yàn)變化規(guī)律表現(xiàn)較于低溫小梁彎曲和彎曲蠕變?cè)囼?yàn)更為敏感，故建議采用低溫劈裂試驗(yàn)來評(píng)價(jià)低溫地區(qū)纖維澆注式瀝青混合料的低溫穩(wěn)定性能。

關(guān)鍵詞 ：低溫地區(qū) ；鋼橋面鋪裝 ；纖維 ；澆注式瀝青混合料 ；低溫抗裂性能

中圖分類號(hào) ：U416           

文獻(xiàn)標(biāo)志碼 ：A            

文章編號(hào) ：1005- 8249  (2023)   05- 0050- 05

DOI : 10. 19860/j . cnki . issn1005- 8249. 2023 . 05 . 008

BU Chunfeng

 （Henan Zhongping Jiaoke Research and Design Institute Co . ,   Ltd . ,   Pingdingshan 467000 ,   China)

Abstract: In order to study the crack resistance of asphalt mixture of steel deck pavement in low temperature area,Select the matrix, SBS, pouring type and fiber pouring type asphalt mixture, Conduct low temperature trabecular bending test, low temperature bending creep test and low temperature splitting test for each asphalt mixture at different low temperatures, This conclusion follows: 1) The strength modulus, bending creep flexibility and splitting limit strain of the substrate, SBS, pouring type and fiber pouring type asphalt mixture are all gradually decreasing with the decrease of temperature, The low-temperature splitting strength increased first and then decreased; 2) The incorporation of fiber can significantly enhance the low temperature crack resistance of poured asphalt mixture, The improvement effect of BF fiber on the low temperature crack resistance of poured asphalt mixture is obviously better than that of PF and LF fiber; 3) The change pattern of low temperature splitting test of fiber pouring asphalt mixture is more sensitive than that of low temperature trabecular bending and bending creep test, Therefore, it is recommended to evaluate the low temperature stability of fiber pouring asphalt mixture in cold areas.

Keywords: low temperature area; steel bridge deck pavement; fiber; pouring asphalt mixture; low temperature crack resistance

作者簡介： 卜春鋒  ( 1982—) ,   男 ，本科， 高級(jí)工程師， 主要從事道路橋梁及市政道路設(shè)計(jì)研究方向工作。

收稿日期 ：2022- 08- 19