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公开(公告)号：US20240254047A1
公开(公告)日：2024-08-01
申请号：US18004560
申请日：2021-07-27
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.
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公开(公告)号：US20240174566A1
公开(公告)日：2024-05-30
申请号：US18280777
申请日：2023-02-09
发明人： Shaochun Li , Xu Chen , Mengjun Hu , Ang Liu , Yongjuan Geng , Jialin Jiang
CPC分类号： C04B18/023 , C04B14/305 , C04B28/02 , C04B40/0231
摘要： Provided are a nano-titanium dioxide (NT)/biochar (BC) composite, and a preparation method and use thereof, which belong to the technical field of cement-based materials. NT is introduced into a porous structure of the micron-sized BC, which not only addresses the high aggregation of NT, but also reduces Ca(OH)2 size and crystal growth orientation through effects such as filling and nucleation brought by NT in the porous structure of BC. In this way, more C—S—H gels are generated to fill the pores, thereby improving an interfacial transition zone (ITZ), which enhances the mechanical properties such as compressive strength and flexural strength. The NT/BC composite of the disclosure is doped into a cement-based material, which allows that in a surface layer of the cement-based material, CO2 absorption capacity could be improved through carbon sequestration properties and the porous structure of the composite, and the carbonization of the surface layer could be accelerated by hydration accelerating properties of the NT to form a calcium carbonate surface protective layer, thereby improving durability of the cement-based material.
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3.发明公开公开(公告)号：US20240300857A1
公开(公告)日：2024-09-12
申请号：US17999157
申请日：2021-07-27
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.
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