公开(公告)号：US20240254047A1

公开(公告)日：2024-08-01

申请号：US18004560

申请日：2021-07-27

申请人： QINGDAO UNIVERSITY OF TECHNOLOGY

发明人： Shaochun Li ,  Shilin Xu ,  Ang Liu ,  Yongjuan Geng ,  Dongshuai Hou ,  Ruiyong Zhang ,  Zuquan Jin ,  Song Gao

IPC分类号： C04B24/42 ,  C04B22/06 ,  C04B40/00 ,  C04B103/40

CPC分类号： C04B24/42 ,  C04B22/066 ,  C04B40/0046 ,  C04B2103/408

摘要： Provided is the use of a silane composite emulsion as an anti-cracking enhancer in a cement-based material. In the present disclosure, active groups on an isobutyltriethoxysilane molecule react with hydroxyl groups on a surface of a mortar to form a layered hydrophobic structure, slowing down a water loss inside the mortar of a cement-based material. The dehydration of butyl acrylate forms a network structure, which fills pores of the cement-based material, inhibits shrinkage of the cement-based material, and reduces the cracking caused by the shrinkage. Tetraethoxysilane can undergo hydrolysis at a room temperature to generate nano-silica with a large number of hydroxyl groups on a surface; and the nano-silica can undergo secondary hydration with calcium hydroxide in the cement to form a secondary hydration product C—S—H gel, thereby filling most of voids to make a structure of the cement hydration product denser, to increase a strength of the mortar.

公开(公告)号：US20240300857A1

公开(公告)日：2024-09-12

申请号：US17999157

申请日：2021-07-27

申请人： QINGDAO UNIVERSITY OF TECHNOLOGY

发明人： Shaochun Li ,  Shilin Xu ,  Ang Liu ,  Yongjuan Geng ,  Dongshuai Hou ,  Ruiyong Zhang ,  Zuquan Jin ,  Song Gao

IPC分类号： C04B24/04 ,  C04B14/04 ,  C04B24/32 ,  C04B24/42 ,  C04B40/00 ,  C04B103/40 ,  C04B103/56

CPC分类号： C04B24/04 ,  C04B14/045 ,  C04B24/32 ,  C04B24/42 ,  C04B40/0046 ,  C04B2103/408 ,  C04B2103/58

摘要： The present disclosure provides use of a graphene oxide/butyl acrylate/silane composite emulsion as an anti-shrinkage agent of a cement-based material. 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.