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DEVELOPMENT OF THE TECHNIQUEFOR INSPECTION AND SIMULTANEOUS REPAIRING OF CRACKS IN CONCRETE STRUCTURES.

混凝土结构裂缝检查和同步修复技术的发展。

基本信息

批准号：
06555127
负责人：
OTSUKA Koji
金额：
$ 4.61万
依托单位：
TOHOKU GAKUIN UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
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

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06555127/
关键词：
Crack search Crack repair X-ray technique with contrast medium X-ray contrast medium Repair with the ability of contrast medium 造影剤造影補修材

项目摘要

Experiments were carried out to develop a technique for the inspection and the simultaneous repairing of cracks in concrete structures. As results of experiments, the following conclusion can be drawn :(1) Inspection of cracks :A new x-ray technique using a contrast medium was developed for this research. A liquid type contrast medium used in this research also developed. The contrast medium was injected into cracks at the surface of a reinforced concrete specimen. We succeeded to inspect cracks in the concrete under the conditions that the crack width was wider than 0.2 mm and the depth of the specimen was smaller than 25 cm.(2) The technique for inspection and simultaneous repairing of concrete :A test was done to develop a new technique to inspect cracks in the concrete and to repair the cracks simultaneously. The contrast medium was mixed with an epoxy type glue by high speed mixing machine. A bending test with reinforced concrete beam was doen to confirm both abilities of the new contrast medium for crack inspection and crack bonding. The result was satisfactory.(3) Injection test for the cracks at the bottom surface :A test was done to develop an injecting technique for cracks formed at the bottom surface of concrete structures such as a reinforced concrete slab. As a result, it was thought that with the actual method the contrast medium could not reach up to the tip of the crack. More research should be done for this point.

通过试验研究，提出了一种混凝土结构裂缝的检测和同步修补技术。实验结果表明：（1）裂纹的检测：提出了一种新的X射线造影技术。本研究还开发了一种液体型造影剂。将造影剂注入钢筋混凝土试件表面的裂缝中。在裂缝宽度大于0.2mm、试件深度小于25cm的条件下，我们成功地检测了混凝土中的裂缝。(2)混凝土裂缝检测与修补同步技术：通过试验研究，提出了一种混凝土裂缝检测与修补同步技术。通过高速混合机将造影剂与环氧型胶混合。通过钢筋混凝土梁的弯曲试验，验证了新型对比剂的裂缝检测和裂缝粘结能力。结果令人满意。(3)底面裂缝的喷射试验：进行试验以开发用于在混凝土结构（例如钢筋混凝土板）的底面形成的裂缝的喷射技术。因此，认为使用实际方法时，造影剂无法到达裂纹尖端。这一点还有待进一步研究。