Synthetic Study on Self-Placeable Concrete

自浇混凝土综合研究

基本信息

批准号：
03302044
负责人：
OKAMURA Hajime
金额：
$ 15.62万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

Experimental and analytical studies were carried out in order to develop concrete for self- placeable concrete and to establish the manufacturing and construction system for the concrete. Through this research, following results were obtained.1.Development of cementitious materialTesting methods of the qualities of cementitious material were proposed. Using these methods,many kinds of powder material were evaluated. It was concluded that the moderate heat cement is suitable as the standard powder material for self-placeable concrete. On the other hand,it was pointed out that the deformability of concrete depends on the combination of the cement and the super plasticizer.2.Development of material design systemMaterial design system for concrete was established. The system is composed of the mix design system and the durability check system.3.Development of manufacturing systemControl system of the filling capacity of concrete by using two-step mixing was established based on the investigation of the mechanism of mixing. In the upper mixer,surface water of sand is adjusted using the torque of mixer. In the lower mixser, slump flow and funnel passing time are controlled. Filling capacity of concrete are successfully controlled by this system.4.Development of construction systemIt was clarified that the construction system can be rationalized by the improvement of construction method which includes the application of self-placeable concrete and the decision of structural type. Confirmation method of filling of concrete to the structure using infrared rays was developed. Appraisal system of new construction technology,which includes self-placeable concrete,was established from the viewpoint of constructability,durability(quality) of structure and economizability.

进行了实验和分析研究，以开发出可置位混凝土的混凝土，并建立混凝土的制造和施工系统。通过这项研究获得了以下结果。1。提出了水泥材料质量的水泥材料测试方法的开发。使用这些方法，评估了多种粉末材料。得出的结论是，中等热水泥适合作为可自植物混凝土的标准粉末材料。另一方面，有人指出，混凝土的可变形性取决于水泥和超增塑剂的组合。2。建立了混凝土的材料设计系统材料设计系统的开发。该系统由混合设计系统和耐用性检查系统组成。3。基于对混合机理的研究，建立了使用两步混合的混凝土填充能力的制造系统Control系统的开发。在上部搅拌机中，使用混合器的扭矩调节沙子的地表水。在较低的混合体中，控制底盘和漏斗的传递时间得到控制。混凝土的填充能力由该系统成功控制。4。建筑系统的开发澄清，可以通过改进施工方法合理化施工系统，其中包括应用可自动化的混凝土和结构类型的决定。开发了使用红外线填充混凝土到结构的确认方法。新建筑技术的评估系统（包括可自植物的混凝土）是从可构造性，结构耐用性（质量）和节能性的角度建立的。