PREDICTION OF CARBONATION PROGRESS USING MORTAR THIN PLATE SPECIMEN

薄板モルタル供試体を用いた中性化環境の評価に関する基礎的検討

It is known that environmental condition affects carbonation progress of concrete. The micro environmental condition for carbonation is not same even in the same structure. Therefore, the depth of carbonation at various points is not same even in the same structure. It is important to evaluate the effect of environmental condition on the carbonation progress. The purpose of this study is to evaluate the influence of environmental conditions on the carbonation process of concrete structure. Mortar thin plate specimens were exposed on various points in two bridges for 3 month. The effects of the type of binder and exposure season were studied. After exposure, the amount of CaCOз and water content in the plate specimen were measured. The carbonation depth in each part of the structure was closely related with the amount of CaCOз in the specimen exposed to the same point. Furthermore, the carbonation depth can be predicted from the amount of CaCOз in the mortar thin plate specimen. In this study, it was verified that the relative rate of carbonation progress can be evaluated from the amount of CaCOз in the plate specimen. It was confirmed that carbonation progress of concrete structure were serviced of long term can be evaluated by the mortar thin plate specimen were exposed to three months. Therefore, rate of the carbonation depth of concrete structure can be evaluated from rate of the amount of CaCOз in the plate specimen.本研究では、環境条件がコンクリート構造物の中性化の進行に及ぼす影響を評価するため、薄板状の小型モルタル供試体を2つの橋梁に貼り付けて暴露し、実構造物の異なる部位における環境条件の影響を評価した。また、モルタルの配合および暴露期間が中性化環境の評価に及ぼす影響についても検討した。その結果、薄板モルタル供試体によって、実構造物における中性化の進行を部位毎に評価することが可能であることが確認できた。また、配合や暴露期間が変化しても評価精度には大きく影響しないことが分かった。

• Record URL:
  • https://doi.org/10.14250/cement.66.485
• Record URL:
  • https://www.jstage.jst.go.jp/article/cement/66/1/66_485/_pdf
• 
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=PREDICTION+OF+CARBONATION+PROGRESS+USING+MORTAR+THIN+PLATE+SPECIMEN&author=T.+YAMADA&author=M.+KIKUCHI&author=T.+SAITO&author=T.+SAEKI&publication_year=2012
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09163182
• Authors:
  • YAMADA, Takeshi
  • KIKUCHI, Michio
  • SAITO, Tsuyoshi
  • SAEKI, Tatsuhiko
• Publication Date: 2012

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 485-490
• Serial:
  • Cement Science and Concrete Technology
  • Volume: 66
  • Issue Number: 1
  • Publisher: Japan Cement Association
  • ISSN: 0916-3182
  • EISSN: 2187-3313
  • Serial URL: https://www.jstage.jst.go.jp/browse/cement/-char/en
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Carbonation; Concrete bridges; Concrete structures; Environmental impacts; Moisture content; Mortar; Structural plates
• Subject Areas: Bridges and other structures; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01522436
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Apr 22 2014 4:07PM