A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SELF-HEALING HEAVY CONCRETE AND PRECAST CONCRETE
PROBLEM TO BE SOLVED: To provide a self-healing heavy concrete that is applicable to a containment vessel for radiation shielding in which it is difficult to repair a crack after the construction of the containment vessel and that has improved water cut-off performance.SOLUTION: The self-healing heavy concrete is produced by blending a powder containing cement, fly ash and an expansive admixture, water and a heavyweight aggregate. In this case, a weight ratio between the water and the powder is 17 to 40%. Also fly ash of 120 to 200 kg and the expansive admixture of 30 to 80 kg are blended per volume of 1 cubic meter. Further the expansive admixture is activated by being vapor cured after removal of forms. Thereby heavy concrete can be self-healed around 21 days even when the crack has 0.2 mm width or less and has an initial permeated water amount of about 0.30 cm/s or less.SELECTED DRAWING: Figure 4
【課題】施工後にひび割れ補修が難しい放射線遮蔽用格納容器に適用可能な、止水性能を高めた自己治癒性重量コンクリートを提供する。【解決手段】自己治癒性重量コンクリートは、セメント、フライアッシュ、及び膨張材を含む粉体と、水と、重量骨材とが配合される。この際、水と粉体との重量比が１７〜４０％である。また、体積１立方メートルあたり、フライアッシュは１２０〜２００ｋｇ、及び膨張材は３０〜８０ｋｇ配合される。更に、脱型後に蒸気養生されることで、膨張材を活性化させる。これにより、重量コンクリートにおいて、０．２ｍｍ幅以下、初期の透水量が０．３０ｃｍ3／ｓ程度以下のひび割れであっても２１日前後で自己治癒させることができる。【選択図】図４
SELF-HEALING HEAVY CONCRETE AND PRECAST CONCRETE
PROBLEM TO BE SOLVED: To provide a self-healing heavy concrete that is applicable to a containment vessel for radiation shielding in which it is difficult to repair a crack after the construction of the containment vessel and that has improved water cut-off performance.SOLUTION: The self-healing heavy concrete is produced by blending a powder containing cement, fly ash and an expansive admixture, water and a heavyweight aggregate. In this case, a weight ratio between the water and the powder is 17 to 40%. Also fly ash of 120 to 200 kg and the expansive admixture of 30 to 80 kg are blended per volume of 1 cubic meter. Further the expansive admixture is activated by being vapor cured after removal of forms. Thereby heavy concrete can be self-healed around 21 days even when the crack has 0.2 mm width or less and has an initial permeated water amount of about 0.30 cm/s or less.SELECTED DRAWING: Figure 4
【課題】施工後にひび割れ補修が難しい放射線遮蔽用格納容器に適用可能な、止水性能を高めた自己治癒性重量コンクリートを提供する。【解決手段】自己治癒性重量コンクリートは、セメント、フライアッシュ、及び膨張材を含む粉体と、水と、重量骨材とが配合される。この際、水と粉体との重量比が１７〜４０％である。また、体積１立方メートルあたり、フライアッシュは１２０〜２００ｋｇ、及び膨張材は３０〜８０ｋｇ配合される。更に、脱型後に蒸気養生されることで、膨張材を活性化させる。これにより、重量コンクリートにおいて、０．２ｍｍ幅以下、初期の透水量が０．３０ｃｍ3／ｓ程度以下のひび割れであっても２１日前後で自己治癒させることができる。【選択図】図４
SELF-HEALING HEAVY CONCRETE AND PRECAST CONCRETE
自己治癒性重量コンクリート及びプレキャストコンクリート
EGUCHI HIDEO (author) / IGAWA HIDEKI (author)
2016-12-08
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
/
B28B
Formgeben von Ton oder anderen keramischen Stoffzusammensetzungen, Schlacke oder von Mischungen, die zementartiges Material enthalten, z.B. Putzmörtel
,
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
/
G21C
NUCLEAR REACTORS
,
Kernreaktoren
/
G21F
Schutz gegen Röntgenstrahlung, Gammastrahlung, Korpuskularstrahlung oder Teilchenbeschuss
,
PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
PRECAST CONCRETE PANEL HAVING SELF HEALING PERFORMANCE FOR CRACK
| European Patent Office | 2021
CONCRETE FRAME AND PRECAST CONSTRUCTION - Precast concrete piles using self-compacting concrete
| Online Contents | 2005
Heavy precast concrete structural work
Engineering Index Backfile | 1957
Precast Concrete Member Manufacturing Method Using Self-leveling Precast Concrete Composition
| European Patent Office | 2020
Precast concrete piles using self-compacting concrete
| British Library Online Contents | 2005