2025/01/01 by Hui Zhang, Chengwen Wang · 1 voice
Engineering · #Advanced materials and composites #Concrete and Cement Materials Research #Drilling and Well Engineering
paper · pdf · doi:10.1515/ntrev-2025-0163
openalex publication_date 2025/01/01 · openalex created_date 2025/07/11 · openalex updated_date 2026/06/11
Abstract This study addresses the challenges of low compressive strength and inadequate fracture toughness in conventional cementing materials, aiming to enhance the resistance to extrusion and cracking in cement sheaths for perforation and fracturing operations. Comprehensive research and testing were conducted on NT composite cement, emphasizing the significant effects of nano-titanium dioxide’s crystal phase, particle size, dosage, and curing age. The findings indicate that a curing age of 28 days, coupled with a particle size of 10 nm and a dosage of 2.32%, results in the most notable improvement in compressive strength, achieving a maximum increase of 22.5% in cement stone strength. Additionally, rutile phase NT composite cement featuring a particle size of 500 nm and a dosage of 3.88% demonstrates an enhancement in compressive strength by 12%. In terms of fracture toughness, optimal improvements are observed at a curing age of 3 days, with NT composite cement exhibiting a particle size of 10 nm and a dosage of 2.32% resulting in an impressive 65.4% increase. Moreover, rutile phase NT composite cement with a particle size of 500 nm and a dosage of 2.32% exhibits a remarkable improvement in fracture toughness of 76%. These results underscore the potential of nano-titanium dioxide for advancing the performance characteristics of cementing materials.