A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
CONCRETE ADMIXTURE, CONCRETE COMPOSITION, METHOD OF CONCRETE PLACING, AND MASSIVE CONCRETE
To provide a concrete admixture that is capable of reducing the structural strength correction value even when receiving a high temperature history due to ambient conditions and hydration heat, especially in the early stages of hardening of such concrete as hot-weather concrete and massive concrete.SOLUTION: A concrete admixture comprising at least one component A which is selected from water-soluble vinyl copolymers, and (ii) a component B consisting of aldehyde condensation products having aromatic rings, wherein the mass ratio of component A/component B is in the range of 30/1 to 1/20. The mass ratio of component A/component B is preferably in the range of 18/1 to 1/10, and the component B may be: a condensation product of naphthalene sulfonate and/or naphthalene sulfonate with formaldehyde; and/or a condensation product of melamine sulfonate and/or melamine sulfonate with formaldehyde.SELECTED DRAWING: None
【課題】暑中コンクリートやマスコンクリート等の特に硬化初期において、周囲の環境条件や水和熱等により高い温度履歴を受ける場合であっても、構造体強度補正値を低減することの可能なコンクリート混和剤の提供を課題とする。【解決手段】コンクリート混和剤は、水溶性ビニル共重合体から選ばれる少なくとも１種以上のＡ成分と、芳香環を有するアルデヒド縮合物からなるＢ成分とを含有し、Ａ成分／Ｂ成分の質量比が３０／１〜１／２０の範囲である。Ａ成分／Ｂ成分の質量比が１８／１〜１／１０の範囲であることが好適であり、Ｂ成分は、ナフタレンスルホン酸及び／又はナフタレンスルホン酸塩とホルムアルデヒドとの縮合物、及び／又は、メラミンスルホン酸及び／又はメラミンスルホン酸塩とホルムアルデヒドとの縮合物であってもよい。【選択図】なし
CONCRETE ADMIXTURE, CONCRETE COMPOSITION, METHOD OF CONCRETE PLACING, AND MASSIVE CONCRETE
To provide a concrete admixture that is capable of reducing the structural strength correction value even when receiving a high temperature history due to ambient conditions and hydration heat, especially in the early stages of hardening of such concrete as hot-weather concrete and massive concrete.SOLUTION: A concrete admixture comprising at least one component A which is selected from water-soluble vinyl copolymers, and (ii) a component B consisting of aldehyde condensation products having aromatic rings, wherein the mass ratio of component A/component B is in the range of 30/1 to 1/20. The mass ratio of component A/component B is preferably in the range of 18/1 to 1/10, and the component B may be: a condensation product of naphthalene sulfonate and/or naphthalene sulfonate with formaldehyde; and/or a condensation product of melamine sulfonate and/or melamine sulfonate with formaldehyde.SELECTED DRAWING: None
【課題】暑中コンクリートやマスコンクリート等の特に硬化初期において、周囲の環境条件や水和熱等により高い温度履歴を受ける場合であっても、構造体強度補正値を低減することの可能なコンクリート混和剤の提供を課題とする。【解決手段】コンクリート混和剤は、水溶性ビニル共重合体から選ばれる少なくとも１種以上のＡ成分と、芳香環を有するアルデヒド縮合物からなるＢ成分とを含有し、Ａ成分／Ｂ成分の質量比が３０／１〜１／２０の範囲である。Ａ成分／Ｂ成分の質量比が１８／１〜１／１０の範囲であることが好適であり、Ｂ成分は、ナフタレンスルホン酸及び／又はナフタレンスルホン酸塩とホルムアルデヒドとの縮合物、及び／又は、メラミンスルホン酸及び／又はメラミンスルホン酸塩とホルムアルデヒドとの縮合物であってもよい。【選択図】なし
CONCRETE ADMIXTURE, CONCRETE COMPOSITION, METHOD OF CONCRETE PLACING, AND MASSIVE CONCRETE
コンクリート混和剤、コンクリート組成物、コンクリート組成物の打込み方法、及びマスコンクリート
MATSUSHITA TETSURO (author) / KOJIMA MASAO (author) / NISHIOKA YUKIKO (author) / SHIMOBATAKE KEIJI (author) / SHINCHI MASATOSHI (author) / KUNIOKA JUN (author) / ZEN SHINKAN (author) / YODA KAZUHISA (author) / KANDA TETSUSHI (author) / NAITO HIROKI (author)
2021-03-25
Patent
Electronic Resource
Japanese
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