Mix proportion principle and performance development mechanism of concrete containing large quantity of coal ash

大粉煤灰混凝土配合比原理及性能发展机理

• 批准号: 12450228
• 负责人: MATSUFUJI Yasunori
• 金额: $ 9.54万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450228/
• 关键词: coal ash; concrete; large quantity use; sand replacement; mix proportion principle; performance mechanism; fresh concrete; compressive strength

In this study, theories on mix proportion and performance development mechanism of concrete containing large quantity of coal ash which have been shown by the investigators of this research project were experimented and checked.Many results were confirmed on this concrete, for example, as follows.1. The greater the coal ash content of concrete with constant cement content, the lower the pore volume over the diameter of 50 nm, although the total pore volume was equal.As result, the compressive strength of concrete became higher.2. The relation between the amount of mixing water and void volume composed of powder affected to the consistency of fresh concrete.The greater the former, the greater the consistency, because the free water was left over.

本研究对本课题研究人员提出的大掺量粉煤灰混凝土的配合比理论和性能发展机理进行了试验和验证，并在该混凝土上得到了如下结果：1.在水泥用量不变的情况下，粉煤灰掺量越大，50 nm以上的孔体积越小，而总孔体积相同，混凝土的抗压强度越高.拌和用水量与粉料空隙率的关系对新拌混凝土的稠度有影响，前者越大，由于游离水的残留，新拌混凝土的稠度越大。