Evaluation of the field application of the Air Void Analyzer in quality control.
Evaluation of the field application of the Air Void Analyzer in quality control.
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DOI：
10.18297/etd/739
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Kessinger;D. Todd
中科院分区：
文献类型：
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作者：
Kessinger;D. Todd
对三种实验室混凝土配合比和一种现场混凝土配合比进行了评价，以建立空穴分析仪（AVA）作为实时、“现场”质量控制测试方法的手段。在本研究中，同时使用了气孔分析仪和常规测试方法来检查每个混凝土配合比。每种混合物评估三次，共记录12次测试。组织实验数据，以便对不同的测试方法进行直接比较。通过气隙分析仪测试获得的风量、间距系数和比表面积与使用传统方法测量的耐久性指数和总风量相关。研究表明，混凝土的耐久性是由空隙系统的结构决定的，空隙系统的结构由空隙系数和比表面积表示。使用AVA作为现场质量控制方法，应注意调平、供电，特别是测试液体的温度。
Three lab concrete mixes and one field concrete mix were evaluated to establish the Air Void Analyzer (AVA) as a means of real-time, “In-the-Field”, Quality Control testing method. In this study, both the Air Void Analyzer and conventional test methods were used to examine each concrete mix. Each mix was evaluated three times to record a total of twelve tests. Experimental data were organized to allow direct comparison of different testing methods. The air volume, the spacing factor, and the specific surface area that were obtained from the Air Void Analyzer tests were correlated to the durability index and total air volume that were measured with traditional methods. The research shows that the durability of concrete is governed by the structure of air void system, which is represented by the spacing factor and the specific surface area. To use AVA as a field quality control method, one should pay attention to leveling, power supply, and especially the temperature of testing liquids.