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Establishment of Analysis Method and Evaluation Test of Fresh Concrete.

新拌混凝土分析方法及评价试验的建立。

基本信息

批准号：
14350300
负责人：
MORI Hiroshi
金额：
$ 8.13万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350300/
关键词：
Yield Value Plastic Viscosity Property of Aggregates Pressure Dependent Property Shear Strain Dependent Property Transition of Property Viscoplastic Finite Element Method Viscoplastic Suspension Element Method 骨材形状マトリックス間隙水圧塑性粘度 /

项目摘要

The results obtained in this research are summarized as follows :1.Pressure Dependent Property, Shear Strain Dependent Property and Transition of PropertyIn order to clarify the pressure dependent property, the shear strain dependent property and the transition of property, the shear test and the improved shear box test were carried out. According to the experimental results, the pressure dependent property, the shear strain dependent property and the transition of property are clarified and modeled.2.Influence of Properties of Aggregate and Powder on ConsistencyIn order to clarify the influence of properties of aggregate and powder on consistency of fresh concrete or mortar, some experimental investigations were carried out. According to the experimental results, it is clarified that the consistency of fresh concrete and mortar is more influenced by consistency of matrix paste than the touch of fine and course aggregates with each other, and the replacement with sphere shaped fly ash decreases the yield value.3.Simulation of Shear Box TestIn order to clarify the internal distribution of stress in material in shearing box, the shear box test was simulated by viscoplastic finite element method and viscoplastic suspension element method. According to the simulational results with Bingham model, the shear strain dependent property was represented. Furthermore, it is clarified that the material between hinged walls are compressed under large shear strain because the distance between walls are extremely decreased.

1.压力相关性、剪应变相关性及性质的转变为了阐明压力相关性、剪应变相关性及性质的转变，进行了剪切试验和改进的剪切盒试验。根据试验结果，阐明了骨料和粉料性质对新拌混凝土或砂浆稠度的影响，并对骨料和粉料性质对新拌混凝土或砂浆稠度的影响进行了试验研究。试验结果表明，新拌混凝土和砂浆的稠度主要受基质浆体稠度的影响，而细、粗骨料之间的接触对稠度的影响较小，球形粉煤灰的掺入降低了材料的屈服值。3.剪切盒试验的模拟为了弄清剪切盒内材料内部的应力分布，采用粘塑性有限元法和粘塑性悬挂单元法对剪切盒试验进行了数值模拟。根据宾汉模型的模拟结果，揭示了剪切应变的相关性。此外，它被澄清，在大的剪切应变下，铰接墙之间的材料被压缩，因为墙之间的距离极大地减少。