CONSTRICTION REDUCING AGENT FOR GEOPOLYMER AND GEOPOLYMER CURED BODY

• Main Authors: OKADA TOMOHISA, KITAZATO SINGO, HASHIZUME SUSUMU, SUGA AKIRA, LI ZHUGUO
• Format: Patent
• Language: English; Japanese
• Published: 16.11.2017
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; REFRACTORIES; SLAG; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF NATURAL STONE

PROBLEM TO BE SOLVED: To provide a novel geopolymer additive for providing a cured body capable of not only increasing of fluidity holding time before curing geopolymer and securing strength development, but also inhibiting dry constriction.SOLUTION: There is provided a constriction reducing agent for geopolymer containing an ester compound having an oxyalkylene group such as a compound (I) represented by the formula (1). R-C(=O)-O-(AO)-R(1), where Ris a C1 to 30 alkyl group or a C2 to 30 alkenyl group, AO is a C2 to 4 bivalent alkylene oxide group, n1 is an integer of 1 to 200, Ris H, a C1 to 30 alkyl group, a C2 to 30 alkenyl group or a -C(=O)-Rgroup and Ris a C1 to 30 alkyl group or a C2 to 30 alkenyl group.SELECTED DRAWING: None 【課題】ジオポリマーの硬化前の流動性保持時間の延長と硬化体の強度発現性の確保のみならず、乾燥収縮を抑制できる硬化体を得られる、新たなジオポリマー用添加剤の提供。【解決手段】式（１）で表される化合物（Ｉ）等のオキシアルキレン基を有するエステル系化合物を含む、ジオポリマー用収縮低減剤。Ｒ１−Ｃ（＝Ｏ）−Ｏ−（Ａ１Ｏ）ｎ１−Ｒ２（１）（Ｒ１はＣ１〜３０のアルキル基又はＣ２〜３０のアルケニル基；Ａ１ＯはＣ２〜４の二価のアルキレンオキサイド基；ｎ１は１〜２００の整数；Ｒ２はＨ、Ｃ１〜３０のアルキル基、Ｃ２〜３０のアルケニル基又は−Ｃ（＝Ｏ）−Ｒ３基；Ｒ３はＣ１〜３０のアルキル基又はＣ２〜３０のアルケニル基）【選択図】なし