抄録
A detailed investigation was carried out on 30-year-old concrete specimens made with ordinary portland cement (OPC), high early-strength portland cement (HES), Type B slag cement (SCB), and alumina cement (AL). In each specimen, steel bars were embedded at cover depths of 20, 40, and 70 mm. Mineralogy and microstructure of mortar portions at the inner and outer regions, aggregate-matrix and steel-matrix interfaces, and deposits in the voids of the mortar portions were investigated. It is concluded from the results that the microstructure of concrete at the outer region for AL and SCB becomes denser compared with the inner region. For AL, the inner region is relatively more porous, and a porous steel-concrete interface is also found. Other conclusions on the ingress of SO 3 and Cl, leaching of Ca, and healing of voids in concrete are also summarized herein.
| 元の言語 | 英語 |
|---|---|
| ページ（範囲） | 3-12 |
| ページ数 | 10 |
| ジャーナル | ACI Materials Journal |
| 巻 | 101 |
| 発行部数 | 1 |
| 出版物ステータス | 出版済み - 1 2004 |
| 外部発表 | Yes |
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All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Building and Construction
- Materials Science(all)
これを引用
Concrete after 30 years of exposure - Part 1 : Mineralogy, microstructures, and interfaces. / Mohammed, Tarek Uddin; Hamada, Hidenori; Yamaji, Toru.
：: ACI Materials Journal, 巻 101, 番号 1, 01.2004, p. 3-12.研究成果: ジャーナルへの寄稿 › 記事
}
TY - JOUR
T1 - Concrete after 30 years of exposure - Part 1
T2 - Mineralogy, microstructures, and interfaces
AU - Mohammed, Tarek Uddin
AU - Hamada, Hidenori
AU - Yamaji, Toru
PY - 2004/1
Y1 - 2004/1
N2 - A detailed investigation was carried out on 30-year-old concrete specimens made with ordinary portland cement (OPC), high early-strength portland cement (HES), Type B slag cement (SCB), and alumina cement (AL). In each specimen, steel bars were embedded at cover depths of 20, 40, and 70 mm. Mineralogy and microstructure of mortar portions at the inner and outer regions, aggregate-matrix and steel-matrix interfaces, and deposits in the voids of the mortar portions were investigated. It is concluded from the results that the microstructure of concrete at the outer region for AL and SCB becomes denser compared with the inner region. For AL, the inner region is relatively more porous, and a porous steel-concrete interface is also found. Other conclusions on the ingress of SO 3 and Cl, leaching of Ca, and healing of voids in concrete are also summarized herein.
AB - A detailed investigation was carried out on 30-year-old concrete specimens made with ordinary portland cement (OPC), high early-strength portland cement (HES), Type B slag cement (SCB), and alumina cement (AL). In each specimen, steel bars were embedded at cover depths of 20, 40, and 70 mm. Mineralogy and microstructure of mortar portions at the inner and outer regions, aggregate-matrix and steel-matrix interfaces, and deposits in the voids of the mortar portions were investigated. It is concluded from the results that the microstructure of concrete at the outer region for AL and SCB becomes denser compared with the inner region. For AL, the inner region is relatively more porous, and a porous steel-concrete interface is also found. Other conclusions on the ingress of SO 3 and Cl, leaching of Ca, and healing of voids in concrete are also summarized herein.
UR - http://www.scopus.com/inward/record.url?scp=3042619451&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=3042619451&partnerID=8YFLogxK
M3 - Article
VL - 101
SP - 3
EP - 12
JO - ACI Materials Journal
JF - ACI Materials Journal
SN - 0889-325X
IS - 1
ER -