Rapid construction of the waterproof concrete slab at the bottom of the deep shaft. Placing of anti-washout underwater concrete with high early portland cement.
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Accession number;99A0243811
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| Title;Rapid construction of the waterproof concrete slab at the bottom of the deep shaft. Placing of anti-washout underwater concrete with high early portland cement. |
| Author;
TANIMURA DAIZABURO
(Minist. of Constr., Kanto Reg. Constr. Bur.)
UEDA JUN'ICHI
(Konoike Constr. Co., Ltd.)
UEMURA KAZUYA
(Konoike Constr. Co., Ltd., Tech. Res. Inst.)
KAWAKAMI TADASHI
(Konoike Constr. Co., Ltd., Tech. Res. Inst.)
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Journal Title;Cement & Concrete
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Journal Code:F0277A
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ISSN:0371-0718
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VOL.;NO.624;PAGE.35-42(1999)
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| Figure&Table&Reference;FIG.12, TBL.8, REF.9 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;In the rapid construction of the bottom for the purpose of the water cut-off at vertical shaft of great depth underground, the underwater non-segregation concrete of about 1800m3 using the high-early-strength Portland cement in order to finish early the pumping up was placed. The mixtures are of a water cement ratio 50%, a unit cement content 440kg/m3, a unit quantity of water 220kg/m3, the largest aggregate 20mm, a slump flow 50cm, the design strength 24N/mm2. In the present rapid construction, the homogeneous placing management by cleaning of the caisson edge tips, rapid response to the change of the quality of the underwater non-segregation concrete and adoptation of high-early-strength cement of good early age strength were effective. |
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