A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
EXPANSIVE CEMENT COMPOSITION, MORTAR, AND CONCRETE
To provide an expansive cement composition capable of further increasing expansiveness using the same amount of expansive agent as a conventional expansive agent added thereto.SOLUTION: The expansive cement composition comprises cement, an expansive agent and inorganic fine powder, with the content of the inorganic fine powder being from 8 to 60 pts.mass, preferably from 10 to 50 pts.mass, more preferably from 20 to 40 pts.mass relative to 100 pts.mass of the sum of the cement, the expansive agent and the inorganic fine powder. The expansive cement composition has an activity index at a material age of 7 days of from 8 to 85%, preferably from 20 to 70%, more preferably from 35 to 65%, and further more preferably from 35 to 55%, with the fineness of the inorganic fine power in terms of Blaine specific surface area being from 3000 to 10000 cm2/g, and preferably being from 5000 to 8000 cm2/g. The expansive cement composition preferably comprises at least one species of inorganic powder selected from fly-ash, fine powder of limestone and fine powder of silica stone.SELECTED DRAWING: None
【課題】従来の膨張材と同添加量で、膨張性のより向上ができる膨張性セメント組成物の提供。【解決手段】セメントと膨張材と無機微粉末とを含み、前記セメントと前記膨張材と前記無機微粉末との合計１００質量部に対する、前記無機微粉末の含有量が８〜６０質量部、好ましくは１０〜５０質量部、より好ましくは２０〜４０質量部である膨張性セメント組成物。さらに、材齢７日の活性度指数が、８〜８５％、好ましくは２０〜７０％、より好ましくは３５〜６５％更に好ましくは、３５〜５５％であり。無機微粉末の粉末度が、ブレーン比表面積で３０００〜１００００ｃｍ２/ｇが望ましく、５０００〜８０００ｃｍ２／ｇがより望ましい膨張性セメント組成物。無機微粉末としてフライアッシュや石灰石微粉末、及び珪石微粉末から選択される１種以上を使用することが望ましい膨張性セメント組成物。【選択図】なし
EXPANSIVE CEMENT COMPOSITION, MORTAR, AND CONCRETE
To provide an expansive cement composition capable of further increasing expansiveness using the same amount of expansive agent as a conventional expansive agent added thereto.SOLUTION: The expansive cement composition comprises cement, an expansive agent and inorganic fine powder, with the content of the inorganic fine powder being from 8 to 60 pts.mass, preferably from 10 to 50 pts.mass, more preferably from 20 to 40 pts.mass relative to 100 pts.mass of the sum of the cement, the expansive agent and the inorganic fine powder. The expansive cement composition has an activity index at a material age of 7 days of from 8 to 85%, preferably from 20 to 70%, more preferably from 35 to 65%, and further more preferably from 35 to 55%, with the fineness of the inorganic fine power in terms of Blaine specific surface area being from 3000 to 10000 cm2/g, and preferably being from 5000 to 8000 cm2/g. The expansive cement composition preferably comprises at least one species of inorganic powder selected from fly-ash, fine powder of limestone and fine powder of silica stone.SELECTED DRAWING: None
【課題】従来の膨張材と同添加量で、膨張性のより向上ができる膨張性セメント組成物の提供。【解決手段】セメントと膨張材と無機微粉末とを含み、前記セメントと前記膨張材と前記無機微粉末との合計１００質量部に対する、前記無機微粉末の含有量が８〜６０質量部、好ましくは１０〜５０質量部、より好ましくは２０〜４０質量部である膨張性セメント組成物。さらに、材齢７日の活性度指数が、８〜８５％、好ましくは２０〜７０％、より好ましくは３５〜６５％更に好ましくは、３５〜５５％であり。無機微粉末の粉末度が、ブレーン比表面積で３０００〜１００００ｃｍ２/ｇが望ましく、５０００〜８０００ｃｍ２／ｇがより望ましい膨張性セメント組成物。無機微粉末としてフライアッシュや石灰石微粉末、及び珪石微粉末から選択される１種以上を使用することが望ましい膨張性セメント組成物。【選択図】なし
EXPANSIVE CEMENT COMPOSITION, MORTAR, AND CONCRETE
膨脹性セメント組成物、モルタル、及びコンクリート
USHIRO MASATAKA (author)
2020-09-03
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
| Engineering Index Backfile | 1965
| European Patent Office | 2024
| European Patent Office | 2024