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A platform for research: civil engineering, architecture and urbanism
Use of graphene oxide/butylacrylate/silane composite emulsion as anti-shrinkage agent
The present disclosure provides use of a graphene oxide/butyl acrylate/silane composite emulsion as an anti-shrinkage agent of a cement-based material, and belongs to the technical field of cement-based materials. In the present disclosure, active groups on an isobutyltriethoxysilane molecule reacts with hydroxyl groups on a surface of a mortar to form a layered hydrophobic structure, thereby slowing a water loss in the mortar of the cement-based material and avoiding cracking caused by drying shrinkage. Butyl acrylate can be dehydrated to form polymer fibers with a spatial network to fill pores of a cement paste, thereby limiting the shrinkage of the mortar. Graphene oxide has a relatively large specific surface area and oxygen-containing functional groups on a surface, which can provide growth sites for hydration products, and promote the hydration products to form a regular and dense structure in the form of a template, thus ensuring a strength of the cement-based material. Sodium silicate mixed into the cement-based material can be hydrolyzed to form silica gel; the silica gel can react with calcium ions to form a C-S-H gel, which fills pores of a matrix to improve an early strength of the cement-based material.
Use of graphene oxide/butylacrylate/silane composite emulsion as anti-shrinkage agent
The present disclosure provides use of a graphene oxide/butyl acrylate/silane composite emulsion as an anti-shrinkage agent of a cement-based material, and belongs to the technical field of cement-based materials. In the present disclosure, active groups on an isobutyltriethoxysilane molecule reacts with hydroxyl groups on a surface of a mortar to form a layered hydrophobic structure, thereby slowing a water loss in the mortar of the cement-based material and avoiding cracking caused by drying shrinkage. Butyl acrylate can be dehydrated to form polymer fibers with a spatial network to fill pores of a cement paste, thereby limiting the shrinkage of the mortar. Graphene oxide has a relatively large specific surface area and oxygen-containing functional groups on a surface, which can provide growth sites for hydration products, and promote the hydration products to form a regular and dense structure in the form of a template, thus ensuring a strength of the cement-based material. Sodium silicate mixed into the cement-based material can be hydrolyzed to form silica gel; the silica gel can react with calcium ions to form a C-S-H gel, which fills pores of a matrix to improve an early strength of the cement-based material.
Use of graphene oxide/butylacrylate/silane composite emulsion as anti-shrinkage agent
LIU ANG (author) / GENG YONGJUAN (author) / HOU DONGSHUAI (author) / ZHANG RUIYONG (author) / JIN ZUQUAN (author) / GAO SONG (author) / LI SHAOCHUN (author) / XU SHILIN (author)
2024-04-04
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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