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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) >SLUMP FLOW MODEL FOR EVALUATING OF THE RHEOLOGICAL PARAMETERS OF FRESH FRSCC
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SLUMP FLOW MODEL FOR EVALUATING OF THE RHEOLOGICAL PARAMETERS OF FRESH FRSCC

机译：新型FRSCC流变参数的滑流模型。

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摘要

The yield stress and plastic viscosity are two fundamental parameters for describing the behavior of Self-Compacting Concrete and fiber reinforced Self-Compacting Concrete.Generally, they are calculated from flow curves which are obtained from viscometer or rheometer. Many researchers contend that the slump flow test is a single-point method Practically, the standard slump flow test gives two results, the slump flow diameter and slump flow T500.The relationship between slump flow and yield stress has been recognized, which results in the development of simpler test method. Some valuable models, i.e. finite element model and slump model, were derived. The plastic viscosity significantly influences the flow velocity of fresh Self-Compacting Concrete, which can be reflected by T500.In this paper, the slump flow of the fresh PP fiber reinforced mortar and steel fiber reinforced Self-Compacting Concrete was studied. A slump flow model was derived. The yield stress and average viscosity was calculated using the measured slump flow and T500.The results indicted the slump flow test can be used to characterize the rheological properties of fresh SCC.
机译：屈服应力和塑性粘度是描述自密实混凝土和纤维增强自密实混凝土性能的两个基本参数。通常，它们是根据从粘度计或流变仪获得的流动曲线计算得出的。许多研究人员认为坍落度流量测试是单点方法，实际上，标准坍落度流量测试给出了两个结果：坍落度流量直径和坍落度流量T500，已经认识到坍落度流量与屈服应力之间的关系，从而导致开发更简单的测试方法。推导了一些有价值的模型，即有限元模型和坍落度模型。塑性粘度显着影响新鲜的自密实混凝土的流速，这可以通过T500反映出来。本文研究了新鲜的PP纤维增强砂浆和钢纤维增强的自密实混凝土的坍落度。推导出坍落度模型。使用测得的坍落度流量和T500计算屈服应力和平均粘度，结果表明坍落度测试可用于表征新鲜SCC的流变性。

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