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The examination of the chemicals on foaming action of the concrete and improvement on freeze-thaw resistance-proof in the cold region.

寒冷地区化学品对混凝土发泡作用的检验及抗冻融性能的提高。

基本信息

批准号：
10650572
负责人：
SUGIYAMA Masashi
金额：
$ 2.05万
依托单位：
Hokkai-Gakuen University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

1)The purpose. In the cold region, air foam has been taken in order to improve frost-proof of the concrete. However, the entrained of the air was unstable. I noticed borohydride chemicals which generated the hydrogen gas in always stabilizing, in reacting under the existence of the water as the technology which can form the bubble chemically. I noticed borohydride chemicals which generated the hydrogen gas in always stabilizing, in reacting under the existence of the water as the technology which can form the bubble chemically. Foaming test and freezing and thawing durability test were carried out in fiscal 1998, and in this chemical compound, it was clarified that there was sufficient frost-proof improvement effect. Permeability concrete of which the freezing and thawing durability was comparatively bad was tested in fiscal 1999.2)The experimental result. (1) The analysis of bubble characteristics in the hardening concrete. Bubble organization of the hardening concrete which added the borohydride chemicals was measured by the image analysis method. The data was carrying out the analysis, and the existence of the minute bubble which contributes to the frost-proof improvement was recognized. (2) The freeze/thaw test. On the permeability concrete, the hydrogenation boron chemical compound was added, and the freeze/thaw test of the concrete was carried out. As the result, permeability concrete which added this borohydride chemicals confirmed that the freezing and thawing durability is improved.3)The summary. From the above result, the bubble formed in the concrete by the chemical action of the hydrogenation boron chemical compound recognized the effect which improved frost-proof of permeability concrete of which the freeze-thaw resistance was bad until now. This technology the possibility of the practical application is sufficient, and the progress to the development research can be expected.

1)目的。在寒冷地区，为了提高混凝土的抗冻性，采用了空气泡沫。然而，空气的夹带是不稳定的。我注意到产生氢气的硼氢化物化学物质，在水的存在下反应，总是稳定的，就像化学上形成气泡的技术一样。我注意到产生氢气的硼氢化物化学物质，在水的存在下反应，总是稳定的，就像化学上形成气泡的技术一样。1998财政进行了发泡试验和冻融耐久性试验，明确了该化合物具有足够的防冻改善效果。对冻融耐久性较差的透水混凝土进行了1999年2月的试验研究。(1)硬化混凝土气泡特性分析。用图像分析方法测定了添加硼氢化物的硬化混凝土的气泡组织。对数据进行了分析，确认了微小气泡的存在有助于提高防冻性。(2)冻融试验。在渗透性混凝土上加入氢化硼化合物，并对混凝土进行了冻融试验。结果表明，掺加硼氢化物的透水混凝土的冻融耐久性得到了提高。3)总结。从上述结果可以看出，氢化硼化合物在混凝土中形成的气泡，对迄今为止抗冻融性能较差的透气性混凝土具有改善其防冻性的作用。该技术实际应用的可能性是充分的，开发研究的进展是可以预期的。