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首页> 外文会议>Conference on Asphalt Paving Technology >State of Practice on the Use of Tack Coats for Micro-Surfacing Applications: A Survey
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State of Practice on the Use of Tack Coats for Micro-Surfacing Applications: A Survey

机译：在大面积应用中使用粘性大衣的实践现状：一项调查

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This paper presents the results of the first comprehensive national survey on the state of practice on the use of tack coats for micro-surfacing applications and factors that affect the bond strength of micro-surfacing mixes. Surveys were sent to all state and provincial transportation agencies in the United States (US) and Canada. The survey questions were developed to collect information on the state of the practice related to: use of tack coat for micro-surfacing applications, types of tack coat materials, dilution rates of tack coat materials, residual application rates, determination of rate for different types of surfaces, methods used for tack coat distribution, and micro-surfacing failures related to tack coat application. The key findings of the survey are summarized. The results indicated that 11 of the transportation agencies that responded to the survey are currently using tack coat on all surfaces with micro-surfacing. In addition, ten agencies indicated using tack coat on some but not all surfaces with micro-surfacing, such as concrete surfaces or surfaces that are heavily raveled or oxidized. Finally, 18 agencies indicated that they do not use tack with micro-surfacing application. The survey results indicated that there is no consensus among responding transportation agencies about the importance of using tack coat for micro-surfacing applications. Most agencies that use tack coat with micro-surfacing believe that it is critical for providing adequate bonding with the underlying surface, while the majority of the agencies that do not use tack coat believe that it is not needed, as adequate bonding can be provided by the emulsion in the micro-surfacing mix. However, some agencies that stopped using tack coat with micro-surfacing (such as Indiana DOT and Michigan DOT) have noted some debonding issues and decided to or are considering adding a requirement for tack coat usage. The survey results also indicated that none of the responding agencies are performing field tests to evaluate the bonding strength of micro-surfacing mixes. Furthermore, four agencies indicated that they do perform tests to evaluate bonding strength between asphalt layers. The tests used included either a pull-off test on milled surfaces (Kansas) or a direct shear bond test (Tennessee, Texas, and West Virginia).
机译：本文介绍了首次全面的全国性调查的结果，该调查涉及将粘性涂料用于微表层涂料的实践状况以及影响微表层混合物粘结强度的因素。调查已发送给美国（US）和加拿大的所有州和省级运输机构。制定调查问题的目的在于收集有关以下方面的实践状态的信息：粘性涂层在微表面应用中的使用，粘性涂层材料的类型，粘性涂层材料的稀释率，残留涂覆率，不同类型的使用率确定表面，用于分配粘性涂层的方法以及与粘性涂层应用相关的微表面失效。总结了调查的主要发现。结果表明，接受调查的11家运输公司目前在所有带有微表层的表面上都使用了粘性涂层。此外，十个机构表示在一些但不是全部具有微表面的表面上使用了粘性涂层，例如混凝土表面或被严重撕碎或氧化的表面。最后，有18家代理商指出，他们不使用微表面处理胶粘剂。调查结果表明，在应对交通的运输机构之间，对于使用粘性涂料在微饰面应用中的重要性并没有达成共识。大多数使用带有微表面的粘性涂层的代理商认为，对于与底层表面提供充分的粘合至关重要，而大多数不使用粘合涂层的代理商则认为不需要，因为可以通过以下方式提供足够的粘合：微表层混合物中的乳液。但是，一些停止使用带有微表面的粘性涂层的机构（例如Indiana DOT和Michigan DOT）已经注意到一些脱胶问题，并决定或正在考虑增加使用粘性涂层的要求。调查结果还表明，没有响应机构在进行现场测试以评估微表层混合物的粘结强度。此外，四个机构表示，他们确实进行了测试以评估沥青层之间的粘结强度。所使用的测试包括铣削表面的拉拔试验（堪萨斯州）或直接剪切粘结试验（田纳西州，德克萨斯州和西弗吉尼亚州）。

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