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A platform for research: civil engineering, architecture and urbanism
SHRINKAGE REDUCING AGENT FOR CEMENT AND CEMENT COMPOSITION
PROBLEM TO BE SOLVED: To provide a shrinkage reducing agent for cement which suppresses cracking by virtue of a good shrinkage reducing effect, does not lower freeze damage resistance and compressive strength, and does not impair workability during construction due to low viscosity of the cement composition.SOLUTION: The shrinkage reducing agent for cement contains 90.0 to 99.9 parts by mass of a component (A) and 10.0 to 0.1 parts by mass of a component (B). Component (A): polyoxyalkylene derivative represented by formula (1): RO-(AO)-R...(1): Component (B): polyoxyalkylene derivative represented by the formula (2) where Mand Mcalculated from the chromatogram obtained by gel permeation chromatography satisfy a relationship of formula (3): RO-(PO)-H...(2),0.35≤M/M≤0.75...(3)SELECTED DRAWING: Figure 1
【課題】良好な収縮低減効果を発現することでひび割れを抑制するとともに、耐凍害性と圧縮強度が低下せず、またセメント組成物の粘性が低く施工時の作業性が低下しないセメント用収縮低減剤の提供。【解決手段】成分（Ａ）と成分（Ｂ）とを９０．０〜９９．９質量部：１０．０〜０．１質量部の割合で含有するセメント用収縮低減剤。成分（Ａ）：式（１）で表されるポリオキシアルキレン誘導体：Ｒ１Ｏ−（ＡＯ）ｍ−Ｒ２・・・（１）：成分（Ｂ）：式（２）で表され、かつゲル浸透クロマトグラフィー測定により求められるクロマトグラムから算出されるＭＨとＭＬとが式（３）の関係を満足するポリオキシアルキレン誘導体Ｒ３Ｏ−（ＰＯ）ｎ−Ｈ・・・（２）、０．３５≦ＭＬ／ＭＨ≦０．７５・・・（３）【選択図】図１
SHRINKAGE REDUCING AGENT FOR CEMENT AND CEMENT COMPOSITION
PROBLEM TO BE SOLVED: To provide a shrinkage reducing agent for cement which suppresses cracking by virtue of a good shrinkage reducing effect, does not lower freeze damage resistance and compressive strength, and does not impair workability during construction due to low viscosity of the cement composition.SOLUTION: The shrinkage reducing agent for cement contains 90.0 to 99.9 parts by mass of a component (A) and 10.0 to 0.1 parts by mass of a component (B). Component (A): polyoxyalkylene derivative represented by formula (1): RO-(AO)-R...(1): Component (B): polyoxyalkylene derivative represented by the formula (2) where Mand Mcalculated from the chromatogram obtained by gel permeation chromatography satisfy a relationship of formula (3): RO-(PO)-H...(2),0.35≤M/M≤0.75...(3)SELECTED DRAWING: Figure 1
【課題】良好な収縮低減効果を発現することでひび割れを抑制するとともに、耐凍害性と圧縮強度が低下せず、またセメント組成物の粘性が低く施工時の作業性が低下しないセメント用収縮低減剤の提供。【解決手段】成分（Ａ）と成分（Ｂ）とを９０．０〜９９．９質量部：１０．０〜０．１質量部の割合で含有するセメント用収縮低減剤。成分（Ａ）：式（１）で表されるポリオキシアルキレン誘導体：Ｒ１Ｏ−（ＡＯ）ｍ−Ｒ２・・・（１）：成分（Ｂ）：式（２）で表され、かつゲル浸透クロマトグラフィー測定により求められるクロマトグラムから算出されるＭＨとＭＬとが式（３）の関係を満足するポリオキシアルキレン誘導体Ｒ３Ｏ−（ＰＯ）ｎ−Ｈ・・・（２）、０．３５≦ＭＬ／ＭＨ≦０．７５・・・（３）【選択図】図１
SHRINKAGE REDUCING AGENT FOR CEMENT AND CEMENT COMPOSITION
セメント用収縮低減剤およびセメント組成物
MURAOKA TOSHIHIDE (author) / FUJII MOTOTAKA (author) / HARA YUSUKE (author)
2018-10-04
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
/
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C08L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
,
Massen auf Basis makromolekularer Verbindungen
SELF-SHRINKAGE REDUCING AGENT FOR CEMENT COMPOSITION AND CEMENT COMPOSITION
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