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Construction of Generalized Theory of Porous Concrete with Small to Very Large Size Aggregates,and Its Application

小骨料到特大骨料多孔混凝土广义理论的构建及其应用

基本信息

批准号：
18360263
负责人：
HATANAKA Shigemitsu
金额：
$ 9.84万
依托单位：
Mie University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360263/
关键词：
porous concrete geometrical model small size aggregate big size aggregate wearing test temperature characteristic volume change characteristic pumping characteristic 3Dカメラ再生骨材

项目摘要

In this research, it has been aimed to construct a generalized theory of porous concrete with small to very large size aggregates, based on the internal void structure. The results from the present research are summarized as follows :(1) Manufacturing methodExperimental study on the manufacturing method of porous concrete was carried out, varying void sizes in a wide range.In addition, in order to improve the measuring method of void ratio, a new method using an air meter was proposed.The proposed method realizes a clear separation of the sort of voids i.e. continuous, semi-continuous, and independent voids. Also, rather high accuracy can be expected and required time for measurement can be reasonably shortened.(2) Quality evaluationAbout porosity, possibility was shown that void ratio of porous concrete can be evaluated by using geometrical data of a porous concrete surface obtained from a 3-Dimensional Digitizer. About mechanical characteristics, the relationships between compressive strength and void ratio were examined for a wide-range particle size porous concrete, and a simple geometrical model was proposed to represent the relationships. About volume change characteristics, basic properties of volume change by drying and heating were clarified, and a model that can predict the volume change characteristics of porous concrete was established. About durability, wearing test was carried out, and basic properties of porous concrete in wearing and abrasion were clarified. About thermal characteristics, a series of outdoor experiments on heating characteristics of porous concrete in mid-summer was carried out. As a result, fundamental heating characteristics of porous concrete pavement were clarified, and possibility of a relatively natural heat easing system using the porous concrete in a mid-city etc. was shown.

在本研究中，它的目的是建立一个广义的理论，多孔混凝土与小到非常大的粒径骨料，内部的空隙结构的基础上。主要研究成果如下：（1）制备方法对多孔混凝土的制备方法进行了试验研究，在较大范围内改变了孔隙尺寸，并对孔隙比的测量方法进行了改进，提出了一种利用空气流量计测量孔隙比的新方法，实现了连续、半连续和独立孔隙的清晰区分。此外，可以预期相当高的精度，并且可以合理地缩短测量所需的时间。(2)质量评价关于孔隙率，表明可以通过使用从三维数字化仪获得的多孔混凝土表面的几何数据来评价多孔混凝土的孔隙比。在力学特性方面，研究了大粒径多孔混凝土的抗压强度与孔隙比之间的关系，并提出了一个简单的几何模型来描述这种关系。在体积变化特性方面，阐明了多孔混凝土干燥和加热体积变化的基本特性，建立了多孔混凝土体积变化特性预测模型。在耐久性方面，进行了多孔混凝土的磨损试验，阐明了多孔混凝土在磨损和磨蚀中的基本特性。在热工特性方面，对多孔混凝土在盛夏季节的受热特性进行了一系列室外试验研究。其结果是，基本的多孔混凝土路面的加热特性得到澄清，和一个相对自然的散热系统，在中等城市等使用的多孔混凝土的可能性。