公开(公告)号：US12221379B2

公开(公告)日：2025-02-11

申请号：US18633658

申请日：2024-04-12

Applicant: SHENZHEN UNIVERSITY

Inventor： Hongzhi Cui ,  Dapeng Zheng ,  Qiangwei Pang ,  Yu Jin ,  Yuan Fang

IPC: C04B18/02 ,  B09B3/27 ,  B09B3/70 ,  C04B18/04 ,  C04B20/10 ,  C04B28/06 ,  B09B101/90 ,  C04B111/00

Abstract: Disclosed are a method for preparing a non-sintered shell-wrapped ceramsite using solid waste meanwhile immobilizing a heavy metal in river sediment, and a non-sintered river-sediment-based shell-wrapped ceramsite, which relate to the technical field of building materials. The disclosure combines river sediment with a solid waste powder and an alkali activating powder material, and adopts multiple-step granulations to realize particle size control and physical pore formation, thereby obtaining a non-sintered ceramsite. A sulfoaluminate cement and a Portland cement are used to encapsulate the non-sintered ceramsite and form a shell by wrapping, thereby preparing a non-sintered river-sediment-based shell-wrapped ceramsite with internal porosity and dense shell.

公开(公告)号：US20220081363A1

公开(公告)日：2022-03-17

申请号：US17474908

申请日：2021-09-14

Applicant: Shenzhen University

Inventor： Feng Xing ,  Yuan Fang ,  Aoxuan Wang

IPC: C04B28/00 ,  C04B14/38 ,  C04B14/32

Abstract: An uncalcined geopolymer-based refractory material is provided, comprising a matrix of a geopolymer obtainable by polymerization of a mixture consisting of mineral powder, fly ash, and metakaolin; and SiC whiskers embedded in the geopolymer matrix. The material has excellent mechanical properties and high resistance to high temperatures and exhibits a ductile fracture mechanism instead of a brittle fracture mechanism.

公开(公告)号：US11873247B2

公开(公告)日：2024-01-16

申请号：US18129441

申请日：2023-03-31

Applicant: Shenzhen University

Inventor： Yuan Fang ,  Feng Xing ,  Aoxuan Wang

IPC: C04B14/32 ,  C04B28/00 ,  C04B14/38

CPC classification number: C04B28/006 ,  C04B14/324 ,  C04B14/383

Abstract: Disclosed is a method for preparing an uncalcined geopolymer-based refractory material. The method includes the steps of mixing a mineral powder, a fly ash, a metakaolin, and silicon carbide whiskers by ball milling to form a milled material; mixing the milled material with a sodium water glass solution and water to form a slurry; and curing the slurry to obtain the uncalcined geopolymer-based refractory material. The uncalcined geopolymer-based refractory material thus prepared contains a geopolymer matrix formed of the mineral powder, the fly ash, and the metakaolin and the silicon carbide whiskers embedded in the geopolymer matrix.

公开(公告)号：US11866368B2

公开(公告)日：2024-01-09

申请号：US17474908

申请日：2021-09-14

Applicant: Shenzhen University

Inventor： Feng Xing ,  Yuan Fang ,  Aoxuan Wang

IPC: C04B12/00 ,  C04B28/00 ,  C04B14/32 ,  C04B14/38

CPC classification number: C04B28/006 ,  C04B14/324 ,  C04B14/383

Abstract: An uncalcined geopolymer-based refractory material is provided, comprising a matrix of a geopolymer obtainable by polymerization of a mixture consisting of mineral powder, fly ash, and metakaolin; and SiC whiskers embedded in the geopolymer matrix. The material has excellent mechanical properties and high resistance to high temperatures and exhibits a ductile fracture mechanism instead of a brittle fracture mechanism.

公开(公告)号：US20230250022A1

公开(公告)日：2023-08-10

申请号：US18129441

申请日：2023-03-31

Applicant: Shenzhen University

Inventor： Yuan Fang ,  Feng Xing ,  Aoxuan Wang

IPC: C04B28/00 ,  C04B14/32 ,  C04B14/38

CPC classification number: C04B28/006 ,  C04B14/324 ,  C04B14/383

Abstract: Disclosed is a method for preparing an uncalcined geopolymer-based refractory material. The method includes the steps of mixing a mineral powder, a fly ash, a metakaolin, and silicon carbide whiskers by ball milling to form a milled material; mixing the milled material with a sodium water glass solution and water to form a slurry; and curing the slurry to obtain the uncalcined geopolymer-based refractory material. The uncalcined geopolymer-based refractory material thus prepared contains a geopolymer matrix formed of the mineral powder, the fly ash, and the metakaolin and the silicon carbide whiskers embedded in the geopolymer matrix.

公开(公告)号：US20240217874A1

公开(公告)日：2024-07-04

申请号：US17921201

申请日：2022-06-20

Applicant: SHENZHEN UNIVERSITY

Inventor： Yuan Fang ,  Dapeng Zheng ,  Hongzhi Cui

IPC: C04B14/04 ,  C01B33/26 ,  C04B14/10 ,  C04B18/14 ,  C04B28/00

CPC classification number: C04B14/045 ,  C01B33/26 ,  C04B14/106 ,  C04B18/141 ,  C04B28/006 ,  C01P2004/03 ,  C01P2004/62 ,  C01P2004/64

Abstract: The present disclosure provides a potassium aluminosilicate-based nanogel precursor additive and use thereof in a low calcium system-based geopolymer, belonging to the technical field of geopolymer additives. In the present disclosure, the potassium aluminosilicate-based nanogel precursor additive has a high-activity and potassium aluminosilicate-based short-chain structure, and is a precursor of the low calcium system-based geopolymer. The additive includes K2O, SiO2, and Al2O3, and has a K/Si molar ratio of 1.0 to 4.0 and an Al/Si molar ratio of 0.25 to 1.5. The potassium aluminosilicate-based nanogel precursor additive can be added to a matrix material of the low calcium system-based geopolymer, to effectively optimize a hydration process, balance an internal reaction, and improve a pore structure of the low calcium system-based geopolymer such as metakaolin, thereby improving mechanical properties. The additive effectively avoids harsh curing conditions, uneven hydration reaction, and substandard mechanical properties of the low calcium system-based geopolymer.