自密实大体积混凝土(SCMC)工程性能研究

Her-Yung Wang, Yi-Fang Shih, Heng Su
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引用次数: 4

摘要

研究了素水泥与火山灰混合自密实大体积混凝土的工程性能。在成品浇注前,采用两种配合比和三种厂家的配合比进行质量控制测试和钻孔,并对产品进行测试,检查产品是否符合R1自密实混凝土的性能标准。包括坍落度流动的基本试验、坍落度流动为50 cm时的流动时间、V型漏斗内的流动时间、u型通道内的流动时间(通过障碍物可能性的测试)和充填高度。采用大u形槽试验模拟现场结构原型尺寸,并制作标准圆柱形试件和模型钻芯试件,测定混凝土抗压强度,检查混凝土在运输、浇筑和挤压提升过程中的不均匀性、离析和出血现象。测量了混凝土材料模型水化过程中的温度变化,并在施工现场进行了养护,模拟了未来现场施工条件。这为验证含火山灰自密实大体积混凝土的控温效果提供了可能,该数据可为今后施工项目中自密实混凝土的质量控制提供参考。研究结果表明,掺火山灰自密实大体积混凝土可降低水化热,并具有良好的工程性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Study on of the Engineering Properties of Self-Compacting MassConcrete (SCMC)
This study discusses the engineering properties of the self-compacting mass concrete mixed with plain cement and pozzolan. Two mix proportions of and three manufacturers are were used for quality control testing and drilling before the finished product pouring was poured, and the products are were tested to check determine whether they meet the performance standards of R1 self-compacting concrete. Including basic tests were performed for slump flow, flow time when with a slump flow is of 50 cm, flow time of in a V funnel, flow in a U-shaped channel (testing for possibility flow through obstacles) and filling height. The difference in workability is discussed by was investigated by using a Big U-shaped channel test to simulate the onsite structure prototype dimensions, and standard cylindrical specimens and model core-drilled specimens were made to determine the compressive strength of concrete and to check for non-uniformity, segregation and bleeding in the processes of transportation, pouring and squeezing lift-up. The temperature change during the hydration of the concrete material model was measured, and curing at the work site was carried out to simulate future field construction conditions. This made it possible to validate the temperature control effect of the self-compacting mass concrete with pozzolan, and the data can be used as a reference for selfcompacting concrete quality control in future construction projects. The findings show that self-compacting mass concrete with pozzolan can reduce the heat of hydration and provides other good engineering properties.
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