公开(公告)号：US20240150243A1

公开(公告)日：2024-05-09

申请号：US18502117

申请日：2023-11-06

申请人： SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

发明人： Lihua Wang ,  Chunfeng Li ,  Zhijie Wen ,  Zengguang Pang ,  Xiaoming Fan ,  Qinghua Shu ,  Shifu Sun ,  Qingbiao Wang ,  Chunquan Dai ,  Weiwei Han ,  Shunrong Wang

IPC分类号： C04B28/00 ,  C04B24/16 ,  C04B40/00 ,  C04B40/06

CPC分类号： C04B28/001 ,  C04B24/168 ,  C04B40/0032 ,  C04B40/0616 ,  C04B40/065 ,  C04B2103/0051

摘要： It discloses a sustained release grouting material, a preparation method and an application thereof; the sustained release grouting material comprises a water swelling core and a water-soluble sustained release coating, the water swelling core is composed of bentonite, SAP and xanthan gum, which is granulated by disc granulator relying on the cohesiveness of xanthan gum; the water-soluble sustained-release coating is prepared by mixing water-soluble starch, polyvinyl alcohol, poloxamer, lubricant and plasticizer with deionized water to obtain a film-forming solution, and the film-forming solution is coated on a coating machine; the invention uses a coating machine to coat a layer of slow-release coating on the surface of the water-absorbing expansion core, and adjusts the coating thickness by controlling the mass ratio of the coating film-forming liquid to the water-absorbing expansion core particles, so as to realize the controllable water absorption onset time of the expansion core.