Zhimin Yu

Title: Zhimin Yu and Heat- and Fire-Resistant Geopolymer Materials.

Introduction

Zhimin Yu is an inventor associated with Charlotte, North Carolina. His patent work addresses lightweight geopolymer concrete designed to retain strength under extreme heat, including conditions associated with fires.

Latest Patents

Yu is associated with 1 patent, titled “Heat and Fire Resistant Geopolymer Materials.” The invention describes lightweight geopolymer concrete with a specific gravity below 2.0, typically between 1 and 1.3, while aiming to achieve compressive strength comparable to or greater than ordinary Portland concrete.

The material is designed to limit shrinkage, expansion, and cracking, and to retain its compressive strength when exposed to temperatures of 800°C or higher. The patent describes strength targets ranging from at least 10 MPa for general load-bearing applications to more than 30 MPa, and ideally more than 35 MPa, for demanding uses. It also sets out embodiments intended to limit strength loss after exposure to high temperatures, with some designed to increase load-bearing strength above 400°C.

Key constituents described in the patent include a geopolymer source such as fly ash, cement-coated expanded vermiculite, fibers such as wollastonite, and soluble silicates such as alkali silicates.

Career Highlights

The patent highlights Yu’s work on combining low weight, structural strength, and fire resistance in geopolymer concrete. These properties could be relevant to load-bearing construction, including residential housing, where materials may need to perform during and after exposure to fire.

Collaborations

The provided information names Jessica Cui and Futong Cui as Yu’s coworkers. It does not specify their roles or describe particular contributions to the patent.

Conclusion

Zhimin Yu’s patent focuses on lightweight geopolymer concrete engineered for structural use and improved performance under extreme heat, bringing together low density, compressive strength, and fire resistance.