长沙理工大学学报(自然科学版)
基于界面增强的橡胶-水泥稳定碎石抗冻抗裂性能研究
作者:
作者单位:

(1. 长沙理工大学 交通运输工程学院,湖南 长沙 410114;2. 广西交科集团有限公司,广西 南宁 530007)

作者简介:

通讯作者:

吕松涛(1979—)(ORCID:0000-0003-0426-5033),男,教授,主要从事道路工程方面的研究。 E-mail:lst@csust.edu.cn

中图分类号:

U416.214

基金项目:

国家自然科学基金资助项目(52078063);上海城投(集团)有限公司科技创新计划项目(CTKY-ZDXM-2020-010、CTKY-PTRC-2018-003);广西科技计划项目(AB202097030);长沙理工大学科研创新项目(CX2020SS03)


Study on the frost resistance and cracking resistance of rubber-cement stabilized macadams based on interface enhancement
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Affiliation:

(1. School of Traffic and Transport Engineering, Changsha University of Science & Technology, Changsha 410114, China; 2. Guangxi Delivery Group Co., Ltd., Naning 530007, China)

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    摘要:

    【目的】解决橡胶-水泥界面黏结性能不足的问题。【方法】首先采用4种常见的化学改性方法,即氢氧化钠(NaOH)改性、氢氧化钠-尿素(NaOH-Urea)复合改性、硅烷偶联剂KH560改性和硅酸钠(Na2SiO3)改性,分别对橡胶颗粒进行改性;然后采用改性后的橡胶颗粒制备橡胶-水泥稳定碎石试件;最后开展冻融、干缩及温缩试验。【结果】分别经NaOH-Urea和KH560改性后的橡胶-水泥稳定碎石的抗冻强度损失几乎无变化,但其冻融前后的无侧限抗压强度均约增大1.5倍;5种橡胶-水泥稳定碎石按其干缩性能从优到劣排序依次为:NaOH改性橡胶-水泥稳定碎石、KH560改性橡胶-水泥稳定碎石、NaOH-Urea改性橡胶-水泥稳定碎石、Na2SiO3改性橡胶-水泥稳定碎石、未改性橡胶-水泥稳定碎石;NaOH-Urea和KH560可以提高橡胶-水泥稳定碎石的温缩性能,而NaOH和Na2SiO3对其温缩性能的改善效果不太理想。【结论】NaOH-Urea和KH560的改性效果较好,其有效增强了橡胶-水泥稳定碎石的抗冻抗裂性能。

    Abstract:

    [Purposes] In this study, in order to solve the problem of insufficient adhesion performance of rubber-cement interface. [Methods] Firstly, sodium hydroxide oxidation (NaOH), sodium hydroxide oxidation and urea ammoniation (NaOH-Urea), silane coupling agent KH560 and sodium silicate (Na2SiO3) were used to treat the surface of the rubber particles. Next, the rubber-cement stabilized macadams test pieces were prepared based on the rubber particles treated with different modification methods. Finally, the temperature shrinkage, drying shrinkage and freezing-thawing test were carried out on the prepared samples. [Findings] The results show that rubber-cement stabilized macadams have almost no change after NaOH-Urea modification and KH560 modification. But the unconfined compressive strength of those samples before and after freezing is increased by about 1.5 times. Drying shrinkage performance of the five examined rubber-cement stabilized macadams is in turn: NaOH modification rubber-cement stabilized macadams,KH560 modification rubber-cement stabilized macadams,NaOH-Urea modification rubber-cement stabilized macadams,Na2SiO3 modification rubber-cement stabilized macadams,Unmodified treatment rubber-cement stabilized macadams. The KH560 and NaOH-Urea modification methods improve the temperature resistance of rubber-cement stabilized macadams, while Na2SiO3 and NaOH lead to insignificant improvement. [Conclusions] In summary, NaOH-Urea and KH560 can provide better modification efficiency than their counterparts and are able to enhance the freezing-thawing resistance and cracking resistance of cement stabilized macadams.

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引用本文

吕松涛,丁星岚,刘超超,等.基于界面增强的橡胶-水泥稳定碎石抗冻抗裂性能研究[J].长沙理工大学学报(自然科学版),2023,20(5):67-75.
LYU Songtao, DING Xinglan, LIU Chaochao, et al. Study on the frost resistance and cracking resistance of rubber-cement stabilized macadams based on interface enhancement[J]. Journal of Changsha University of Science & Technology (Natural Science),2023,20(5):67-75.

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  • 收稿日期:2022-02-21
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  • 在线发布日期: 2023-11-15
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