一种新型便携式自凝混凝土流变仪

E. Koehler, D. Fowler, C. Ferraris, S. Amziane
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引用次数: 60

摘要

本文阐述了新拌混凝土流变学的准确测定是保证自固结混凝土生产成功的关键。然而,流变仪在现场很少使用,经验测试方法最常用来确定SCC的可操作性,尽管测量的量与流变参数相关,如果有的话,只是间接的。与其使用多种经验测试方法来测量SCC的可操作性,不如在实验室和现场使用流变仪来快速确定SCC的流动特性。现有的流变仪通常不适合常规现场使用,因为它们的尺寸大,成本高,或两者兼而有之。本文介绍了国际集料研究中心(ICAR)流变仪的使用,这是一种低成本、完全便携式的设备,可以测量从坍落度约50毫米到SCC的混凝土混合物的可工作性。最后给出了室内SCC混合料试验结果和现场试验经验,验证了ICAR流变仪的有效性和实用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
"A New, Portable Rheometer for Fresh Self-Consolidating Concrete"
This paper describes how the accurate determination of fresh concrete rheology is key in ensuring the production of self-consolidating concrete (SCC) is successful. However, rheometers are used infrequently in the field and empirical test methods are most commonly used to determine SCC workability despite measuring quantities that are related to rheological parameters only in an indirect way, if at all. Instead of using multiple empirical test methods to measure the workability of SCC, it is desirable to use a rheometer in both the laboratory and field to determine the flow properties of SCC quickly. Existing rheometers are generally unsuitable for routine field use because of their large size, high cost, or both. This paper describes the use of the International Center for Aggregates Research (ICAR) rheometer, a low-cost, fully portable device that can measure concrete mixtures ranging in workability from approximately 50 mm in slump to SCC. Laboratory test results of SCC mixtures and field testing experience are presented to demonstrate the validity and practicality of the ICAR rheometer.
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