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首页> 外文会议>第二届自密实混凝土设计、性能及应用技术国际研讨会(2nd International Symposium on Design,Performance and Use of Self-Consolidating Concrete SCC'2009-China) >SIGNIFICANCE OF MORTAR FILM THICKNESS TO THE WORKABILITY OF SCC
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SIGNIFICANCE OF MORTAR FILM THICKNESS TO THE WORKABILITY OF SCC

机译：砂浆厚度对SC​​C可加工性的意义

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摘要

Fresh self-consolidating concrete (SCC) can be considered as a two-phase material composing of coarse aggregate phase and mortar phase. The coarse aggregate phase provides a skeleton for the concrete while the mortar phase plays a dual role in filling the voids between the coarse aggregate particles and serving as a flowing medium to provide the workability. In this connection, the mortar film thickness should have an effect on the workability of SCC. In this study, 30 batches of SCC were produced and their workability was evaluated by measuring the slump flow, T500 time and V-funnel discharge rate. The mortar film thickness of each batch of SCC was determined from the packing density of the coarse aggregate and the mortar volume of the concrete. It was found that the workability of the SCC varied linearly with mortar film thickness. The significance of mortar film thickness increases as the superplasticizer dosage decreases. From the results, a formula is proposed to determine the workability of SCC from mortar film thickness and superplasticizer dosage. The use of this formula may simplify the mix proportioning of SCC mixes.
机译：新鲜的自固结混凝土（SCC）可以看作是由粗骨料相和砂浆相组成的两相材料。粗骨料相为混凝土提供骨架，而砂浆相在填充粗骨料颗粒之间的空隙并充当流动介质以提供可加工性方面起着双重作用。就此而言，砂浆膜的厚度应影响SCC的可加工性。在这项研究中，生产了30批SCC，并通过测量坍落度，T500时间和V型漏斗排放率来评估其可加工性。由粗骨料的填充密度和混凝土的砂浆体积确定每批SCC的砂浆膜厚度。发现SCC的可加工性随砂浆膜厚度线性变化。随着减水剂用量的减少，砂浆膜厚度的重要性增加。根据结果​​，提出了根据灰浆膜厚度和减水剂用量确定SCC可加工性的公式。使用此公式可以简化SCC混合物的混合比例。

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