A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
QUICK SETTING ADMIXTURE
To provide a quick setting admixture readily capable of imparting high mixing property and adhesion property to the concrete etc., in which even when the quick setting admixture comes in contact with water, it hardly progresses for a very short time, without deteriorating the strength development, but after that it causes instantaneous setting and can provide said properties.SOLUTION: A powdery quick-setting admixture containing 62-86.2% by weight of calcium aluminate having a content molar ratio of CaO to AlO(CaO/AlO) of 1.8 to 2.5 as chemical components, and its balance including sulfates of alkali metal, alkaline earth metal, and aluminium, and characterized in that the content of the alkali metal sulfate (S1) in terms of anhydride relative to the calcium aluminate content of 100 parts by mass is 5 to 16 parts by mass, and the content mass ratio of the alkaline earth metal sulfate (S2) to the aluminum sulfate (S3) is 1≤(S2/S3)≤35 in terms of anhydride.SELECTED DRAWING: None
【課題】強度発現性を低下させることなく、接水しても極短時間は殆ど凝結を進ませないが、以後は瞬結的な凝結を起こさせ、よって高い混合性と付着性をコンクリート等に容易に具備させることのできる急結混和材を提供する。【解決手段】化学成分としてのＣａＯとＡｌ2Ｏ3の含有モル比（ＣａＯ／Ａｌ2Ｏ3）が１．８〜２．５のカルシウムアルミネートを６２〜８６．２質量％と、残部にアルカリ金属、アルカリ土類金属及びアルミニウムの各硫酸塩を含有する粉体状の急結混和材であって、前記カルシウムアルミネート含有量１００質量部に対する無水物換算での前記アルカリ金属の硫酸塩（Ｓ１）の含有量が５〜１６質量部、前記アルミニウムの硫酸塩（Ｓ３）の含有量が１〜１０質量部、かつ前記アルカリ土類金属の硫酸塩（Ｓ２）と前記アルミニウムの硫酸塩（Ｓ３）の含有質量比が無水物換算で１≦（Ｓ２／Ｓ３）≦３５であることを特徴とする急結混和材。【選択図】なし
QUICK SETTING ADMIXTURE
To provide a quick setting admixture readily capable of imparting high mixing property and adhesion property to the concrete etc., in which even when the quick setting admixture comes in contact with water, it hardly progresses for a very short time, without deteriorating the strength development, but after that it causes instantaneous setting and can provide said properties.SOLUTION: A powdery quick-setting admixture containing 62-86.2% by weight of calcium aluminate having a content molar ratio of CaO to AlO(CaO/AlO) of 1.8 to 2.5 as chemical components, and its balance including sulfates of alkali metal, alkaline earth metal, and aluminium, and characterized in that the content of the alkali metal sulfate (S1) in terms of anhydride relative to the calcium aluminate content of 100 parts by mass is 5 to 16 parts by mass, and the content mass ratio of the alkaline earth metal sulfate (S2) to the aluminum sulfate (S3) is 1≤(S2/S3)≤35 in terms of anhydride.SELECTED DRAWING: None
【課題】強度発現性を低下させることなく、接水しても極短時間は殆ど凝結を進ませないが、以後は瞬結的な凝結を起こさせ、よって高い混合性と付着性をコンクリート等に容易に具備させることのできる急結混和材を提供する。【解決手段】化学成分としてのＣａＯとＡｌ2Ｏ3の含有モル比（ＣａＯ／Ａｌ2Ｏ3）が１．８〜２．５のカルシウムアルミネートを６２〜８６．２質量％と、残部にアルカリ金属、アルカリ土類金属及びアルミニウムの各硫酸塩を含有する粉体状の急結混和材であって、前記カルシウムアルミネート含有量１００質量部に対する無水物換算での前記アルカリ金属の硫酸塩（Ｓ１）の含有量が５〜１６質量部、前記アルミニウムの硫酸塩（Ｓ３）の含有量が１〜１０質量部、かつ前記アルカリ土類金属の硫酸塩（Ｓ２）と前記アルミニウムの硫酸塩（Ｓ３）の含有質量比が無水物換算で１≦（Ｓ２／Ｓ３）≦３５であることを特徴とする急結混和材。【選択図】なし
QUICK SETTING ADMIXTURE
急結混和材
HANEI YOSHIHISA (author) / SUGIYAMA AKINORI (author)
2019-12-12
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
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LIME