CN111811896A - 一种基于抗裂性的水泥稳定碎石性能评价方法 - Google Patents
一种基于抗裂性的水泥稳定碎石性能评价方法 Download PDFInfo
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Abstract
本发明公开了一种基于抗裂性的水泥稳定碎石性能评价方法，包括将长方体试模安置在拌合场中测定最大干密度和最佳含水量，拌制水泥稳定碎石混合料装入试模中，养生6天，成型水泥稳定碎石板式试件；从试模中取出水泥稳定碎石板式试件，浸水1天后，利用钻芯机取芯后切割成标准圆柱体试件，测定圆柱体试件的无侧限抗压强度和劈裂强度；通过7天无侧限抗压强度和7天劈裂强度评价水泥稳定碎石的性能。本发明方法能够较好地表征施工现场实际铺筑状态，使水泥稳定碎石试件能够较准确反映其实际性能；同时，引入7天劈裂强度指标，与7天无侧限抗压强度共同评价水泥稳定碎石的性能，可以有效保障水泥稳定碎石抗裂性。
Description
技术领域
本发明涉及交通土建工程技术领域，具体是指一种基于抗裂性的水泥稳定碎石性能评价方法。
背景技术
水泥稳定碎石是我国最常用的道路基层建筑材料，但其存在显著地早期开裂问题。现有水泥稳定碎石性能评价方法的原理和步骤如下：按最佳含水量依据《公路工程无机结合料稳定材料试验规程(JTG E51-2009)》中规定的静压法成型标准圆柱体试件，在规定温度和湿度下养生6天、浸水1天后，进行无侧限抗压强度试验，并以7天无侧限抗压强度评价水泥稳定碎石的性能。
上述方法存在以下不足：
(1)现有试件制备方法与施工现场实际铺筑状态存在较大差异，所制得的水泥稳定碎石试件组成结构与施工现场实际碾压成型的水泥稳定碎石基层结构不符，难以准确表征水泥稳定碎石实际性能；
(2)7天无侧限抗压强度难以直接表征水泥稳定碎石抗裂性。
发明内容
本发明要解决的技术问题是克服以上技术缺陷，提供一种基于抗裂性的水泥稳定碎石性能评价方法。
为了达到上述发明目的，本发明采用的技术方案为：一种基于抗裂性的水泥稳定碎石性能评价方法，包括以下步骤，
(1)将尺寸为长50cm、宽50cm、厚18cm的长方体试模安置在较平坦有一定强度的空地处或安置在以硬化好的拌合场中；
(2)按《公路工程无机结合料稳定材料试验规程(JTG E51-2009)》规定的方法测定最大干密度和最佳含水量，并以此为依据拌制水泥稳定碎石混合料装入试模中；
(3)按《公路路面基层施工技术细则(JTG F20-2015)》的要求利用施工机械碾压试模中的水泥稳定碎石混合料并养生6天，成型水泥稳定碎石板式试件；
(4)从试模中取出水泥稳定碎石板式试件，浸水1天后，利用钻芯机取芯后切割成标准圆柱体试件，测定圆柱体试件的无侧限抗压强度和劈裂强度；
(5)通过7天无侧限抗压强度和7天劈裂强度评价水泥稳定碎石的性能。
本发明的有益效果为：本发明所涉及的水泥稳定碎石制备方法能够较好地表征施工现场实际铺筑状态，使水泥稳定碎石试件能够较准确反映其实际性能；同时，引入7天劈裂强度指标，与7天无侧限抗压强度共同评价水泥稳定碎石的性能，可以有效保障水泥稳定碎石抗裂性。
具体实施方式
下面将结合本发明实施例，对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
一种基于抗裂性的水泥稳定碎石性能评价方法，该方法按以下步骤：
(1)将尺寸为长50cm、宽50cm、厚18cm(与设计等厚)的长方体试模安置在较平坦有一定强度的空地处或安置在以硬化好的拌合场中。
(2)按《公路工程无机结合料稳定材料试验规程(JTG E51-2009)》规定的方法测定最大干密度和最佳含水量，并以此为依据拌制水泥稳定碎石混合料装入试模中。
(3)按《公路路面基层施工技术细则(JTG F20-2015)》的要求利用施工机械碾压试模中的水泥稳定碎石混合料并养生6天，成型水泥稳定碎石板式试件。
(4)从试模中取出水泥稳定碎石板式试件，浸水1天后，利用钻芯机取芯后切割成标准圆柱体试件，测定圆柱体试件的无侧限抗压强度和劈裂强度。
(5)通过7天无侧限抗压强度和7天劈裂强度评价水泥稳定碎石的性能，且应符合下表的要求。
以上对本发明及其实施方式进行了描述，这种描述没有限制性，只是本发明的实施方式之一，实际的实施方式并不局限于此。总而言之如果本领域的普通技术人员受其启示，在不脱离本发明创造宗旨的情况下，不经创造性的设计出与该技术方案相似的结构方式及实施例，均应属于本发明的保护范围。
Claims (1)
1.一种基于抗裂性的水泥稳定碎石性能评价方法，其特征在于：包括以下步骤，
(1)将尺寸为长50cm、宽50cm、厚18cm的长方体试模安置在较平坦有一定强度的空地处或安置在以硬化好的拌合场中；
(2)按《公路工程无机结合料稳定材料试验规程(JTG E51-2009)》规定的方法测定最大干密度和最佳含水量，并以此为依据拌制水泥稳定碎石混合料装入试模中；
(3)按《公路路面基层施工技术细则(JTG F20-2015)》的要求利用施工机械碾压试模中的水泥稳定碎石混合料并养生6天，成型水泥稳定碎石板式试件；
(4)从试模中取出水泥稳定碎石板式试件，浸水1天后，利用钻芯机取芯后切割成标准圆柱体试件，测定圆柱体试件的无侧限抗压强度和劈裂强度；
(5)通过7天无侧限抗压强度和7天劈裂强度评价水泥稳定碎石的性能。
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| CN114166665A (zh) * | 2021-10-29 | 2022-03-11 | 东南大学 | 一种水泥稳定碎石混合料抗裂性能评价的试验方法 |
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| CN114166665A (zh) * | 2021-10-29 | 2022-03-11 | 东南大学 | 一种水泥稳定碎石混合料抗裂性能评价的试验方法 |
| CN114166665B (zh) * | 2021-10-29 | 2023-12-22 | 东南大学 | 一种水泥稳定碎石混合料抗裂性能评价的试验方法 |
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