Shandong University

Qingbiao Wang

Zhijie Wen

Lihua Wang

Zengguang Pang

Shunrong Wang

Shifu Sun

Qinghua Shu

Xiaoming Fan

Weiwei Han

Chunquan Dai

Chunfeng Li

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.

Sustained release grouting material with its preparation method and application

Growing community of inventors

Qingdao, China

Qingbiao Wang