JP2016175787A - 水硬性組成物、フライアッシュ含有水硬性組成物の初期強度向上方法、および、フライアッシュ含有水硬性組成物用添加剤 - Google Patents
水硬性組成物、フライアッシュ含有水硬性組成物の初期強度向上方法、および、フライアッシュ含有水硬性組成物用添加剤 Download PDFInfo
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Abstract
Description
フライアッシュ含有水硬性組成物の初期強度を向上させる方法であって、
該フライアッシュ含有水硬性組成物に、水硬性材料分散剤と4級アンモニウム塩化合物を含む添加剤を添加する。
水硬性材料分散剤と4級アンモニウム塩化合物を含み、該4級アンモニウム塩化合物の含有割合が0.1質量%〜40質量%である。
本発明の水硬性組成物は、ポゾラン反応誘発性物質、ポゾラン活性物質、プロトン非結合型カチオン性化合物を含む。本発明の水硬性組成物に含まれるポゾラン反応誘発性物質は、1種のみであっても良いし、2種以上であっても良い。本発明の水硬性組成物に含まれるポゾラン活性物質は、1種のみであっても良いし、2種以上であっても良い。本発明の水硬性組成物に含まれるプロトン非結合型カチオン性化合物は、1種のみであっても良いし、2種以上であっても良い。
本発明のフライアッシュ含有水硬性組成物の初期強度向上方法は、フライアッシュ含有水硬性組成物の初期強度を向上させる方法であって、該フライアッシュ含有水硬性組成物に、水硬性材料分散剤と4級アンモニウム塩化合物を含む添加剤を添加する。このような方法により、フライアッシュ含有水硬性組成物の初期強度を向上させることができる。
JIS R−5201に規定のフロー試験測定方法に準じて、フロー値を測定した。
実施例、比較例で調整した水硬性組成物を、直径50mm、高さ100mmの円筒型に充填し、30℃で24時間放置した後に脱型し、圧縮強度測定用供試体を作製し、その圧縮強度を、土木学会基準JSCE−G 505−1999に準じて、圧縮試験機を用いて測定した。
温度計、撹拌機、滴下ロート、窒素導入管、及び還流冷却器を備えたガラス製反応容器に、イオン交換水209.0gを仕込み、撹拌下に反応装置を窒素置換し、58℃に昇温した。次に、3−メチル−3−ブテン−1−オールにエチレンオキシド(EO)を平均50モル付加した不飽和ポリアルキレングリコールエーテル(MBO−50)444.8gをイオン交換水111.2gで溶解させた水溶液と、アクリル酸85.2gをイオン交換水43.1gで希釈した水溶液とを5時間かけて滴下した。それと同時に、イオン交換水48.9gにL−アスコルビン酸0.94g及び3−メルカプトプロピオン酸8.0gを溶解させた水溶液並びにイオン交換水44.0gに過硫酸アンモニウム4.9gを溶解させた水溶液を5時間かけて滴下した。滴下終了後、58℃にて1時間攪拌を続けて重合反応を終了し、質量平均分子量(Mw)が9200のポリカルボン酸系共重合体の水溶液を得た。
表1に示すように、水、セメント、フライアッシュ(FA)、砂を配合し、モルタルを調製した。
表2に示すように、製造例2で得られた配合1のモルタル、製造例1で得られたポリカルボン酸系共重合体、Mw=8000のポリ(2−ヒドロキシプロピルジメチルアンモニウムクロライド)を、モルタルミキサーに投入し、水硬性組成物(1)を得た。
結果を表2に示した。
また、製造例1で得られたポリカルボン酸系共重合体、Mw=8000のジメチルアミンエピクロルヒドリン縮合物を、表2に示す配合割合で予め混合して添加剤(1)とし、モルタルミキサー中において、この添加剤(1)を、表2に示す配合割合で、製造例2で得られた配合1のモルタルに添加することによっても、水硬性組成物(1)が得られた。
表2に示すように配合比率を変えた以外は、実施例1と同様に行い、水硬性組成物(2)を得た。また、添加剤(2)を得た。
結果を表2に示した。
Mw=8000のジメチルアミンエピクロルヒドリン縮合物をMw=500のジメチルアミントリメチルアミンエピクロルヒドリン縮合物に代え、表2に示すように配合比率を変えた以外は、実施例1と同様に行い、水硬性組成物(3)を得た。また、添加剤(3)を得た。
結果を表2に示した。
表2に示すように、製造例2で得られた配合1のモルタル、製造例1で得られたポリカルボン酸系共重合体、Mw=20000のジアリルジメチルアンモニウムクロライドの環化重合物を、モルタルミキサーに投入し、水硬性組成物(4)を得た。
結果を表2に示した。
また、製造例1で得られたポリカルボン酸系共重合体、Mw=20000のジアリルジメチルアンモニウムクロライドの環化重合物を予め混合して添加剤(4)とし、モルタルミキサー中において、この添加剤(4)を、製造例2で得られた配合1のモルタルに添加することによっても、水硬性組成物(4)が得られた。
表2に示すように、製造例2で得られた配合1のモルタル、製造例1で得られたポリカルボン酸系共重合体、テトラメチルアンモニウムクロライドを、モルタルミキサーに投入し、水硬性組成物(5)を得た。
結果を表2に示した。
また、製造例1で得られたポリカルボン酸系共重合体、テトラメチルアンモニウムクロライドを、表2に示す配合割合で予め混合して添加剤(5)とし、モルタルミキサー中において、この添加剤(5)を、表2に示す配合割合で、製造例2で得られた配合1のモルタルに添加することによっても、水硬性組成物(5)が得られた。
テトラメチルアンモニウムクロライドをテトラエチルアンモニウムクロライドに代え、表2に示すように配合比率を変えた以外は、実施例5と同様に行い、水硬性組成物(6)を得た。また、添加剤(6)を得た。
結果を表2に示した。
表2に示すように配合比率を変えた以外は、実施例6と同様に行い、水硬性組成物(7)を得た。また、添加剤(7)を得た。
結果を表2に示した。
テトラエチルアンモニウムクロライドをテトラエチルアンモニウムブロミドに代えた以外は、実施例6と同様に行い、水硬性組成物(8)を得た。また、添加剤(8)を得た。
結果を表2に示した。
テトラエチルアンモニウムクロライドをテトラエチルアンモニウムブロミドに代えた以外は、実施例7と同様に行い、水硬性組成物(9)を得た。また、添加剤(9)を得た。
結果を表2に示した。
Mw=8000のジメチルアミンエピクロルヒドリン縮合物を用いなかった以外は、実施例1と同様に行い、水硬性組成物(C1)を得た。また、添加剤(C1)を得た。
結果を表2に示した。
表2に示すように、製造例2で得られた配合2のモルタル、製造例1で得られたポリカルボン酸系共重合体を、モルタルミキサーに投入し、水硬性組成物(C2)を得た。
結果を表2に示した。
また、製造例1で得られたポリカルボン酸系共重合体を添加剤(C2)とし、モルタルミキサー中において、この添加剤(C2)を、表2に示す配合割合で、製造例2で得られた配合2のモルタルに添加することによっても、水硬性組成物(C2)が得られた。
表2に示すように、製造例2で得られた配合2のモルタル、製造例1で得られたポリカルボン酸系共重合体、Mw=8000のジメチルアミンエピクロルヒドリン縮合物を、モルタルミキサーに投入し、水硬性組成物(C3)を得た。
結果を表2に示した。
また、製造例1で得られたポリカルボン酸系共重合体、Mw=8000のジメチルアミンエピクロルヒドリン縮合物を、表2に示す配合割合で予め混合して添加剤(C3)とし、モルタルミキサー中において、この添加剤(C3)を、表2に示す配合割合で、製造例2で得られた配合2のモルタルに添加することによっても、水硬性組成物(C3)が得られた。
Claims (10)
- ポゾラン反応誘発性物質、ポゾラン活性物質、プロトン非結合型カチオン性化合物を含む、水硬性組成物。
- 前記ポゾラン反応誘発性物質と前記ポゾラン活性物質の質量比(ポゾラン反応誘発性物質/ポゾラン活性物質)が10/90〜90/10であり、前記ポゾラン反応誘発性物質、前記ポゾラン活性物質、前記プロトン非結合型カチオン性化合物の合計量100質量部に対する、該プロトン非結合型カチオン性化合物の含有量が、0.0001質量部〜5.0質量部である、請求項1に記載の水硬性組成物。
- 前記プロトン非結合型カチオン性化合物が4級アンモニウム塩化合物である、請求項1または2に記載の水硬性組成物。
- 前記4級アンモニウム塩化合物が、一般式(a)で表される化合物、一般式(b)で表される化合物、一般式(c)で表される化合物、一般式(d)で表される化合物から選ばれる少なくとも1種である、請求項3に記載の水硬性組成物。
- 前記ポゾラン反応誘発性物質が、セメント、消石灰、生石灰、石膏から選ばれる少なくとも1種である、請求項1から4までのいずれかに記載の水硬性組成物。
- 前記ポゾラン活性物質が、フライアッシュ、シリカヒューム、メタカオリン、高炉スラグから選ばれる少なくとも1種である、請求項1から5までのいずれかに記載の水硬性組成物。
- フライアッシュ含有水硬性組成物の初期強度を向上させる方法であって、
該フライアッシュ含有水硬性組成物に、水硬性材料分散剤と4級アンモニウム塩化合物を含む添加剤を添加する、
フライアッシュ含有水硬性組成物の初期強度向上方法。 - 前記添加剤中の前記4級アンモニウム塩化合物の含有割合が0.1質量%〜40質量%である、請求項7に記載のフライアッシュ含有水硬性組成物の初期強度向上方法。
- 前記水硬性材料分散剤が、ポリカルボン酸系共重合体、スルホン酸系分散剤から選ばれる少なくとも1種である、請求項7または8に記載のフライアッシュ含有水硬性組成物の初期強度向上方法。
- 水硬性材料分散剤と4級アンモニウム塩化合物を含み、該4級アンモニウム塩化合物の含有割合が0.1質量%〜40質量%である、フライアッシュ含有水硬性組成物用添加剤。
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