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.

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：US12151973B2

公开(公告)日：2024-11-26

申请号：US18570315

申请日：2022-03-03

Applicant: SHENZHEN UNIVERSITY

Inventor： Hongzhi Cui ,  Weipeng Feng ,  Dapeng Zheng ,  Yu Jin ,  Zhijun Dong

IPC: C04B28/00 ,  C04B22/06 ,  C04B22/16 ,  C04B24/04 ,  C04B24/12 ,  C04B24/20 ,  C04B24/26 ,  C04B24/38 ,  C04B38/02 ,  C04B103/10 ,  C04B103/30 ,  C04B103/44 ,  C04B103/48 ,  C04B111/40

Abstract: Disclosed herein are a fly ash-based foam geopolymer, a preparation method therefor, and the use thereof. The fly ash-based foam geopolymer is prepared from raw materials comprising the following components in parts by weight: 900-1000 parts of a fly ash-based material; 600-700 parts of a composite alkali solution; 0-10 parts of a thickening agent; 2-6 parts of a foam stabilizer A; 5-10 parts of a water reducer; and 20-40 parts of a foaming agent. The preparation method of the present application is simple, and processes such as ball milling, water washing and calcining do not need to be carried out on the raw materials, such that the investment in a grinding equipment, a water washing equipment, a sewage treatment equipment, and a calcining equipment is reduced, and the energy consumption and carbon emissions are reduced. The fly ash-based foam geopolymer prepared by using the fly ash-based material as the main raw material in the present application has a low apparent density and a high early strength, and can be used in the field of fabricated buildings.