权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of Evaluation System for Self-Compactability of Fresh Concrete

新拌混凝土自密实性评价系统的研制

基本信息

批准号：
06505003
负责人：
OKAMURA Hajime
金额：
$ 30.59万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (A)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

The objective of this research is to develop the test method for evaluating the self-compactability of fresh concrete which has arbitary materials and mix proportions and to establish the evaluation system for self-compacting concrete in the process of mix proportioning, manufacturing control and examination at the site.The proto-type test method for evaluating the self-compactability is proposed. It is based on the relationship between the test results and results in the actual construction of structures.For adjusting the properties of concrete to the target, when having the insufficient self compactability, the evaluation system is developed for deformability, segregation resistance and passability through obstacles of fresh concrete. Mathematical simulation methods for flowing concrete are proposed, which can realize the mix design system and construction design without testing in the future.The evaluation methods for material properties in the view point of self-compactability are proposed for the rationalization of mix design. These are also useful for manufacturing control in the concrete plants. The mixing control system is also proposed by using the consumed energy of mixer during mixing.The acceptance test is proposed for examining the self-compactability at the construction site. It is a continuous test of all concrete just before casting. The proposed evaluation system should be verified in each process by collecting data and information in the actual construction and will be modified in the future.

本研究的目的是建立新拌混凝土自密实性能的试验方法，建立自密实混凝土在配合比、生产控制和现场检测等过程中的评价体系，并提出自密实性能的原型试验方法。根据试验结果与实际施工结果之间的关系，在混凝土自密实性不足的情况下，为使混凝土性能达到预期目标，建立了新拌混凝土变形性、抗离析性和通过障碍物能力的评价体系。提出了流态混凝土的数学模拟方法，实现了今后免试验的配合比设计系统和施工设计，并从自适应性角度提出了材料性能评价方法，使配合比设计合理化。这些对于混凝土工厂中的生产控制也是有用的。提出了利用搅拌机在搅拌过程中所消耗的能量来实现搅拌控制的方法，并提出了在施工现场进行验收试验来检验其自适应性。这是一个连续的测试所有混凝土浇筑前。建议的评价体系应在实际施工中收集数据和信息，在每个过程中进行验证，并在未来进行修改。