Effects of phase-inversion waterborne epoxy resin on properties of cold patch waterborne epoxy emulsified asphalt

Q2 Engineering

Transactions Hong Kong Institution of Engineers Pub Date : 2020-04-20 DOI:10.33430/v27n1thie-2019-0012

B. Tang, Yu Gu, Jianming Ling, Lihong He, Fan Yang

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Abstract

In order to evaluate effects of waterborne epoxy resin prepared by the phase-inversion method (phase-inversion waterborne epoxy resin) on properties of waterborne epoxy emulsified asphalt for cold patch engineering of asphalt pavement, a series of methods for evaluating properties of emulsified asphalt and casting resin were used. Results show that, with an increase in waterborne epoxy resin content, penetration, ductility, surface curing time of waterborne epoxy emulsified asphalt decrease and its adhesion degree, shear strength and bond strength increase. Moreover, its penetration, ductility and adhesion degree remain unchanged when the content of waterborne epoxy resin exceeds 20%, and its shear strength and bond strength increase most remarkably when the content of waterborne epoxy resin increases from 10% to 20%. The test results are explained by the surface fluorescent micromorphology of cured waterborne epoxy emulsified asphalt that, with the increase in waterborne epoxy resin content, epoxy resin particles firstly appear as segregated spots, and then change from spotted status to clustered status, and the epoxy resin phase gradually becomes a continuous phase. In conclusion, phase-inversion waterborne epoxy resin has effects on properties of the cold patch waterborne epoxy emulsified asphalt, and recommended content of waterborne epoxy resin is 20%.

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反相水性环氧树脂对冷补水性环氧乳化沥青性能的影响

为了评价相转化法制备的水性环氧树脂（相转化水性环氧）对沥青路面冷补工程用水性环氧乳化沥青性能的影响，采用了一系列乳化沥青和浇注树脂性能的评价方法。结果表明，随着水性环氧树脂含量的增加，水性环氧乳化沥青的渗透性、延展性、表面固化时间降低，其粘附度、抗剪强度和粘结强度增加。此外，当水性环氧树脂的含量超过20%时，其渗透性、延展性和粘附度保持不变，而当水性树脂的含量从10%增加到20%时，剪切强度和粘结强度的提高最为显著。通过固化水性环氧乳化沥青的表面荧光微观形貌解释了试验结果：随着水性环氧树脂含量的增加，环氧树脂颗粒首先出现分离斑点，然后由斑点状态变为聚集状态，环氧树脂相逐渐变为连续相。综上所述，相转化水性环氧树脂对冷补水性环氧乳化沥青的性能有一定影响，建议水性环氧含量为20%。

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来源期刊

Transactions Hong Kong Institution of Engineers Engineering-Engineering (all)

CiteScore

2.70

自引率

0.00%

发文量