Getting it Right: Successful SCC Production Practices

C. R. Cornman, H. Koyata, A. Jeknavorian
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Abstract

This paper describes how the challenge of producing successful self-consolidating concrete (SCC) is based on consistently achieving high flow and high stability. The foundation of high quality SCC production is the suitability of the underlying materials and a mixture design that is optimized for those materials and the application. Not all applications require relatively high slump flows in the range of 28-30 inches (700- 750mm), where control measures need to be especially well managed. Furthermore, even the best mixture designs can have stability limitations. In order to assure that SCC applications proceed with minimal difficulties, the concrete producer must anticipate variations in materials and production operations by using effective quality control procedures. Changes in cement reactivity, aggregate properties (gradation, shape, and water demand), free moisture, and extra sources of moisture that may be present, for instance, in the truck, and the mixing process need to be carefully monitored. This paper will discuss specific examples that demonstrate best practices in mixture design, QA/QC, and production techniques.
正确使用:成功的SCC生产实践
本文描述了生产成功的自固结混凝土(SCC)的挑战是如何基于持续实现高流动和高稳定性。高质量SCC生产的基础是底层材料的适用性,以及针对这些材料和应用进行优化的混合物设计。并不是所有的应用都需要相对较高的坍落度,在28-30英寸(700- 750mm)范围内,这需要特别好的控制措施。此外,即使是最好的混合物设计也有稳定性限制。为了确保SCC应用顺利进行,混凝土生产商必须通过使用有效的质量控制程序来预测材料和生产操作的变化。水泥反应性、骨料性质(级配、形状和需水量)、游离水分和可能存在的额外水分来源的变化(例如,在卡车中)以及混合过程都需要仔细监测。本文将讨论具体的例子,展示最佳实践的混合物设计,质量保证/质量控制,和生产技术。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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