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STUDY ON THE IMPROVEMENT OF FROST RESISTANCE OF CONCRETE FACTORY PRODUCT UNDER SEVERE CONDITIONS

恶劣条件下混凝土工厂产品抗冻性能提高的研究

基本信息

批准号：
14550472
负责人：
SUGAWARA Takashi
金额：
$ 2.11万
依托单位：
Hachinohe National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550472/
关键词：
Concrete Factory Products Concrete Curb Density of Surface Layer Permeable Sheet Permeable Form Method Surface Layer Strength Frost Resistance Scaling Resistance 凍結防止剤リニアトラバース法硬化コンクリートの気泡組織凍結融解試験相対動弾性係数表面剥離透水シート硬化コンクリー

项目摘要

The quality of the surface layer in concrete structures plays an important role in the durability of the concrete. The concrete factory products are made for making the surface smooth and satisfying design compressive strength. A common criterion to judge the quality of concrete products frequently seen in our daily life appears to the "beauty" in terms of consistent shaping.However, as for most concrete curb in such areas where a large amount of anti-freezing agents (NaCl) and ice and snow melting agent (CaCl_2) are spread over roads to ensure road safety during the winter season, since deterioration which combined freezing damage and salt damage. Such things often lead to concern about the safety and reliability of these products. In this study, it was observed how the quality of the surface layer of the concrete product was improved through the production of concrete curb type A by the permeable form method with permeable form (our experimental product) and commercial permeable sheet.And it was investigated about the improvement of the surface layer of the concrete product. The surface layer strength increases by expelling water, and the effect is better as it is close to the permeable sheet side and the block upper part in which pressure is added at the time of placing. Furthermore, there is no surface coarseness and this led to the fine appearance. Moreover, these improvement effects are also found on the conditions actually applied to a concrete product.

混凝土结构表层的质量对混凝土的耐久性起着重要的作用。混凝土工厂产品是为了使表面光滑并满足设计抗压强度而制造的。在我们日常生活中经常见到的判断混凝土产品质量的一个共同标准似乎是造型一致的“美”，然而，对于大多数混凝土路缘石来说，在冬季，为了保证道路安全，在道路上撒有大量的防冻剂（NaCl）和冰雪融化剂（CaCl_2），由于冻害和盐害的共同作用，路缘石会发生劣化。这些事情往往导致对这些产品的安全性和可靠性的关注。在本研究中，通过使用透水模板（本实验品）和商品透水片材的透水模板法生产A型混凝土路缘石，观察了混凝土制品的表层质量的改善情况，并对混凝土制品表层的改善进行了研究。表层强度通过排水而提高，越靠近放置时被加压的透水片侧和砌块上部，效果越好。此外，没有表面粗糙度，这导致了精细的外观。此外，在实际应用于混凝土产品的条件下也发现了这些改进效果。