Cast in place geopolymer concrete pile with heating unit

US11268254B2 · kind B2 · utility

Assignees

• University of Tennessee Research Foundation · US
• Hebei Research Institute of Construction and Geotechnical Investigation Co., Ltd. · CN

Inventors

• Baoshan Huang · Knoxville, US
• Wei Hu · Knoxville, US
• Xiang Shu · Knoxville, US
• Qiang He · Chongqing, CN
• Qingke Nie · Shijiazhuang, CN

Key dates

• Filing date: Jun 1, 2017
• Grant date: Mar 8, 2022
• Expiry date: Jul 7, 2037

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E02D2300/002
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

Methods of preparing cast-in-place geopolymer piles using electrical heating wire (130) to provide heat to cure the piles are described. The heating wire (130) can be associated with a reinforcement cage (120) inserted in the pile shaft. Rod-shaped heating units comprising electrical heating wire (130) can be inserted into a pile shaft and can be reusable. Geopolymer piles with high compressive strength can be prepared from mixtures of class F fly ash and aqueous sodium hydroxide by heating the piles with the heating wire to a stable curing temperature for at least about 24 hours.