INFLUENCE OF FORM COVERED WITH SHEET ON SURFACE QUALITY OF TUNNEL LINING CONCRETE

トンネル覆工コンクリートの表面品質に与える型枠被覆シート材の影響

The study aims at examining the effect of covering sheet on surface quality of concrete. The study uses a concrete-form simulating tunnel sidewall of negative angle and various sheets covering the form, and investigates bugholes and color irregularity of the concrete made in the form covered with the sheet. The primary parameters in the comparative test are water-pressure resistance and air-permeability of the covering sheet. The experimental study shows that water-proofing material sheet contribute decrease color-irregularity as well as bugholes. Based on the laboratory test, this paper presents appropriate properties of sheet to improve concrete surface quality.　本研究では，表面気泡が発生しやすい負の勾配を有するトンネル覆工コンクリート側壁部を模擬した試験型枠を用いて，透水シートおよび透湿防水シートによる型枠被覆が，コンクリート表面性状におよぼす影響を調べた．実験結果より透水シートは表面気泡面積率を最も小さくできたが，コンクリート表面に色むらがみられた．そこで色むらが生じなかった透湿防水シートの透気抵抗度と耐水性に着目し，それらを変化させた場合の表面気泡量を調べた．その結果，色むら抑制および表面気泡低減に有効な透湿防水シートの物性が明らかとなった．

• Record URL:
  • https://doi.org/10.2208/jscejte.72.76
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=INFLUENCE%20OF%20FORM%20COVERED%20WITH%20SHEET%20ON%20SURFACE%20QUALITY%20OF%20TUNNEL%20LINING%20CONCRETE&author=S.%20HARADA&author=T.%20MAEDA&author=M.%20MORIUCHI&author=I.%20YOSHITAKE&publication_year=2016
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/21856575
• Authors:
  • HARADA, Sari
  • MAEDA, Tomoyuki
  • MORIUCHI, Mai
  • Yoshitake, Isamu
• Publication Date: 2016

Language

• English
• Japanese

Media Info

• Media Type: Web
• Pagination: pp 76-81
• Serial:
  • Journal of Japan Society of Civil Engineers, Ser. F1 (Tunnel Engineering)
  • Volume: 72
  • Issue Number: 2
  • Publisher: Japan Society of Civil Engineers
  • ISSN: 2185-6575
  • Serial URL: https://www.jstage.jst.go.jp/browse/jscejte/-char/en

Subject/Index Terms

• TRT Terms: Concrete; Permeability; Tunnel lining; Waterproofing
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 01619632
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Dec 21 2016 11:35AM