JP6602612B2 - セメント用添加剤およびセメント組成物 - Google Patents
セメント用添加剤およびセメント組成物 Download PDFInfo
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- JP6602612B2 JP6602612B2 JP2015177438A JP2015177438A JP6602612B2 JP 6602612 B2 JP6602612 B2 JP 6602612B2 JP 2015177438 A JP2015177438 A JP 2015177438A JP 2015177438 A JP2015177438 A JP 2015177438A JP 6602612 B2 JP6602612 B2 JP 6602612B2
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- Prior art keywords
- cement
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- monomer
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- 239000000654 additive Substances 0.000 title claims description 97
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- 125000004432 carbon atom Chemical group C* 0.000 claims description 45
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 14
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- 150000001342 alkaline earth metals Chemical class 0.000 description 7
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- 239000000194 fatty acid Substances 0.000 description 7
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- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 4
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 4
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 4
- 239000001530 fumaric acid Substances 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
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- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
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- 239000011398 Portland cement Substances 0.000 description 3
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- 159000000007 calcium salts Chemical class 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
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- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- NTVDGBKMGBRCKB-UHFFFAOYSA-M sodium;12-hydroxyoctadecanoate Chemical compound [Na+].CCCCCCC(O)CCCCCCCCCCC([O-])=O NTVDGBKMGBRCKB-UHFFFAOYSA-M 0.000 description 1
- UCWBKJOCRGQBNW-UHFFFAOYSA-M sodium;hydroxymethanesulfinate;dihydrate Chemical compound O.O.[Na+].OCS([O-])=O UCWBKJOCRGQBNW-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229940035024 thioglycerol Drugs 0.000 description 1
- 150000003573 thiols Chemical group 0.000 description 1
- NJRXVEJTAYWCQJ-UHFFFAOYSA-N thiomalic acid Chemical compound OC(=O)CC(S)C(O)=O NJRXVEJTAYWCQJ-UHFFFAOYSA-N 0.000 description 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- 239000000230 xanthan gum Substances 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
- 229940082509 xanthan gum Drugs 0.000 description 1
- 235000010493 xanthan gum Nutrition 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 1
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- Curing Cements, Concrete, And Artificial Stone (AREA)
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Description
一般式(1)で表される不飽和ポリアルキレングリコール系単量体(a)由来の構造単位(I)と一般式(3)で表される不飽和アミド系単量体(c)由来の構造単位(III)を有する共重合体を含み、
該共重合体が、一般式(2−1)で表される不飽和モノカルボン酸系単量体(b−1)由来の構造単位(II−1)を0モル%〜30モル%の含有割合で含み、
該共重合体が、一般式(2−2)で表される不飽和多価カルボン酸系単量体(b−2)由来の構造単位(II−2)を0モル%〜10モル%の含有割合で含む。
本発明のセメント用添加剤は、一般式(1)で表される不飽和ポリアルキレングリコール系単量体(a)由来の構造単位(I)と一般式(3)で表される不飽和アミド系単量体(c)由来の構造単位(III)を有する共重合体を含む。
本発明のセメント用添加剤に含まれる共重合体は、一般式(1)で表される不飽和ポリアルキレングリコール系単量体(a)由来の構造単位(I)と一般式(3)で表される不飽和アミド系単量体(c)由来の構造単位(III)を有する。
本発明のセメント組成物は、本発明のセメント用添加剤を含む。
質量平均分子量は、下記の条件によって測定した。
装置:Waters Alliance(2695)
解析ソフト:Waters社製、Empowerプロフェッショナル+GPCオプション
使用カラム:東ソー社製、TSKguardcolumnsSWXL+TSKgel G4000SWXL+G3000SWXL+G2000SWXL
検出器:示差屈折率計(RI)検出器(Waters 2414)、多波長可視紫外(PDA)検出器(Waters 2996)
溶離液:水10999g、アセトニトリル6001gの混合溶媒に酢酸ナトリウム三水和物115.6gを溶解し、更に酢酸でpH6.0に調整したもの。
較正曲線作成用標準物質:ポリエチレングリコール(ピークトップ分子量(Mp)272500、219300、107000、50000、24000、12600、7100、4250、1470)
較正曲線:上記ポリエチレングリコールのMp値と溶出時間とを基礎にして3次式で作成した。
流量:1mL/分
カラム温度:40℃
測定時間:45分
試料液注入量:100μL
ジムロート冷却管、テフロン(登録商標)製の撹拌翼と撹拌シール付の撹拌器、窒素導入管、温度センサーを備えたガラス製反応容器にイオン交換水:80.0部を仕込み、250rpmで撹拌下、窒素を200mL/分で導入しながら70℃まで加温した。次に、メトキシポリエチレングリコールモノメタクリル酸エステル(エチレンオキシドの平均付加モル数9個):133.4部、メタクリル酸:26.6部、メルカプトプロピオン酸:1.53部、およびイオン交換水:106.7部の混合溶液を4時間かけて滴下し、それと同時に、過硫酸アンモニウム:1.19部とイオン交換水:50.6部の混合溶液を5時間かけて滴下した。滴下完了後、1時間、70℃に保って重合反応を完結させた。そして、水酸化ナトリウム水溶液で中和して、質量平均分子量=20000の減水剤(1)の水溶液を得た。
ジムロート冷却管、テフロン(登録商標)製の撹拌翼と撹拌シール付の撹拌器、窒素導入管、温度センサーを備えたガラス製反応容器にイオン交換水:103.7部を仕込み、250rpmで撹拌下、窒素を200mL/分で導入しながら70℃まで加温した。次に、3−メチル−3−ブテン−1−オール(イソプレノール)の水酸基にエチレンオキシドを付加(エチレンオキシドの平均付加モル数50)させたもの(以下、IPN−50と称す)(80%水溶液):188部、アクリルアミド:9.6部、イオン交換水:53.07部からなる混合溶液を4時間かけて滴下し、それと同時に、3−メルカプトプロピオン酸:0.13部とイオン交換水:29.47部からなる混合溶液と、過硫酸アンモニウム:0.48部とイオン交換水:15.55部からなる混合溶液をそれぞれ5時間かけて滴下した。滴下完了後、1時間、70℃に保って重合反応を完結させた。そして、水酸化ナトリウム水溶液で中和して、質量平均分子量=42000のセメント用添加剤である共重合体(1)の水溶液を得た。
ジムロート冷却管、テフロン(登録商標)製の撹拌翼と撹拌シール付の撹拌器、窒素導入管、温度センサーを備えたガラス製反応容器にイオン交換水:117.3部を仕込み、250rpmで撹拌下、窒素を200mL/分で導入しながら70℃まで加温した。次に、IPN−50(80%水溶液):188部、アクリルアミド:9.6部、イオン交換水:53.07部からなる混合溶液を4時間かけて滴下し、それと同時に、過硫酸アンモニウム:0.48部とイオン交換水:31.59部からなる混合溶液を5時間かけて滴下した。滴下完了後、1時間、70℃に保って重合反応を完結させた。そして、水酸化ナトリウム水溶液で中和して、質量平均分子量=63000のセメント用添加剤である共重合体(2)の水溶液を得た。
ジムロート冷却管、テフロン(登録商標)製の撹拌翼と撹拌シール付の撹拌器、窒素導入管、温度センサーを備えたガラス製反応容器にイオン交換水:103.7部を仕込み、250rpmで撹拌下、窒素を200mL/分で導入しながら70℃まで加温した。次に、IPN−50(80%水溶液):180部、アクリルアミド:16.0部、イオン交換水:44.0部からなる混合溶液を4時間かけて滴下し、それと同時に、3−メルカプトプロピオン酸:0.09部とイオン交換水:29.47部からなる混合溶液と、過硫酸アンモニウム:0.69部とイオン交換水:22.31部からなる混合溶液を、それぞれ5時間かけて滴下した。滴下完了後、1時間、70℃に保って重合反応を完結させた。そして、水酸化ナトリウム水溶液で中和して、質量平均分子量=80000のセメント用添加剤である共重合体(3)の水溶液を得た。
ジムロート冷却管、テフロン(登録商標)製の撹拌翼と撹拌シール付の撹拌器、窒素導入管、温度センサーを備えたガラス製反応容器にイオン交換水:103.7部を仕込み、250rpmで撹拌下、窒素を200mL/分で導入しながら70℃まで加温した。次に、IPN−50(80%水溶液):180部、アクリルアミド:16.0部、イオン交換水:44.0部からなる混合溶液を4時間かけて滴下し、それと同時に、過硫酸アンモニウム:0.69部とイオン交換水:33.82部からなる混合溶液を5時間かけて滴下した。滴下完了後、1時間、70℃に保って重合反応を完結させた。そして、水酸化ナトリウム水溶液で中和して、質量平均分子量=120000のセメント用添加剤である共重合体(4)の水溶液を得た。
≪コンクリート試験≫
実施例1〜4で得られたセメント用添加剤を用いてコンクリート試験を行った。
具体的には、セメントとして普通ポルトランドセメント(太平洋セメント社製)、細骨材として大井川水系産陸砂、粗骨材として青海産砕石、混練水として水道水を用い、セメント:382kg/m3、水:172kg/m3、細骨材:796kg/m3、粗骨材:930kg/m3、細骨材率(細骨材/細粗骨材+粗骨材)(容積比):47%、水/セメント比(重量比)=0.45の配合にてコンクリート組成物を調製した。なお、コンクリート組成物の温度が20℃の試験温度になるように、試験に使用する材料、強制練りミキサー、測定器具類を上記の試験温度雰囲気下で調温し、混練及び各測定は上記の試験温度雰囲気下で行った。なお、コンクリート組成物中の気泡がコンクリート組成物の流動性に及ぼす影響を避けるために、必要に応じてオキシアルキレン系消泡剤を用い、空気量が1.0±0.5%となるように調整した。
上記条件下に強制練りミキサーを用いて混練時間90秒間でコンクリートを製造し、スランプ値、フロー値及び空気量を測定した。なお、スランプ値、フロー値及び空気量の測定は、日本工業規格(JIS−A−1101、1128)に準拠して行った。なお、セメント減水剤の添加量は、フロー値が37.5〜42.5cmになる添加量とした。同じフロー値となる時に、添加量が少ない方がより優れたセメント減水剤である。
結果を表1に示した、
Claims (3)
- 一般式(1)で表される不飽和ポリアルキレングリコール系単量体(a)由来の構造単位(I)と不飽和アミド系単量体(c)由来の構造単位(III)を有する共重合体を含み、
該不飽和アミド系単量体(c)が、アクリルアミドであり、
該共重合体中の、該構造単位(I)と該構造単位(III)との合計の含有割合が、95質量%〜100質量%である、
セメント用添加剤。
- 前記共重合体の質量平均分子量が30000〜500000である、請求項1に記載のセメント用添加剤。
- 請求項1また2に記載のセメント用添加剤を含む、セメント組成物。
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