A5102827210- Innovative concrete reinforcement materials
- Concrete and Cement Materials Research
- Rock Mechanics and Modeling
- Concrete Properties and Behavior
- Geomechanics and Mining Engineering
- Structural Behavior of Reinforced Concrete
- Grouting, Rheology, and Soil Mechanics
- Geophysical Methods and Applications
- Geotechnical Engineering and Underground Structures
- Tailings Management and Properties
- Microbial Applications in Construction Materials
- Advanced Energy Technologies and Civil Engineering Innovations
- Geotechnical and Geomechanical Engineering
- Drilling and Well Engineering
- Materials Engineering and Processing
- Innovations in Concrete and Construction Materials
- Infrastructure Maintenance and Monitoring
- Concrete Corrosion and Durability
University of Science and Technology Beijing
2004-2023
Space Engineering University
2019-2022
As the mine enters deep mining stage, there is a need to enhance compressive strength and toughness of backfill. The objective this study examine mechanical properties cemented tailings backfill after incorporation multi-size fibers validate toughening mechanism basalt (BFs). To achieve this, series basic property tests for BFs mixing were devised, accompanied by industrial computerized tomography (CT) scanning discrete element simulation. This shows that increases then decreases with...
At present, the many domestic, large mined-out areas caused by single filling ability of slurry flow state, thin layer and hardening after in multilayer structure generally need to finish for times, because a experience shows that body last solidification flow, this leads lower one side roof, far distance part cannot pick up top. The determination backfill strength is key problem cemented method, it affected factors. Therefore, through theoretical calculation, laboratory testing numerical...
Abstract-The strength, anti-carbonation resistance and steel corrosion properties of high volume fly ash concrete are studied in this paper. The results show that the strength for 28d is higher than normal concrete, as well resistance, when mixing amount 30% 40% W/B below 0.4. C50 best all due to its low W/B, there almost no carbonation 40%. depth 56d still 10 mm 60%. For with 0.32, weight loss ratio 0.2% 50%, so it has good properties.
Purpose Macro synthetic steel fibers were incorporated into the concrete material as a toughening agent to improve corrosion and cracking resistances of in sulfate-containing service environment. Design/methodology/approach To study basic mechanical properties this system, an accelerated degradation test was designed evaluate influence sulfate ions on concrete. A three-point bending carried out laboratory fracture toughness. The thickness damaged layer changes microstructure degraded...
Shaft lining in ultradeep mines on the coast of eastern China under complex external environments “high situ stress and high osmotic pressure” has disadvantages failure; to solve this problem, field test high-performance concrete shaft structure was carried out Sha-ling gold mine. The study a −1120 m ingate −1114 −1124 shaft. Its deformation were monitored analyzed. maximum compressive HPC at level −1117.7 air intake is 1.91 MPa. Based Von-Mises yield theory analytical solution thick-walled...
This paper discusses reactivity and high-strength mechanism of modified fly ash concrete by DSC, SEM DTA. The result indicates the shape effect, activation effect micro-aggregate is developed sufficiently. enhanced obviously. binder material hydration heat much more than original ash's. products which made with contain less CH C-S-H gel, each day strength higher interfacial transition zone improved Grains are smaller, so it can be scattered into cement paste better to make pores subdivided filled.
In recent years, Pulang Copper Deposit has experienced multiple occurrences of debris flow, varying magnitudes, which have significantly impacted the safety mining operations. Debris flow become a major hazard natural caving in Deposit. To address issues formation due to collapse glacial Deposit, this paper proposes new composite curing agents for grouting and debris. The study investigates influence agents’ proportions on mechanical property, water stability, permeability solidified...
In this article, the effects of surface modification rubber particles on slump, strength, fatigue property and shrinkage for 28d have been investigated. The results show that interface finishing agent can improve fluidity rubberized concrete as well weak layer between cement matrix particles, enhance strength. strength doesn't decrease significantly when mixing amount after treatment is below 15%. Comparing to common concrete, value decreases obviously, by 25.4%, while without 33.3% at test...
In terms of the severe phenomena arising in bridges our country recent years, like decrease bearing force, loss pre-stress and damage bridge deck, this paper studies application lightweight aggregate concrete old deck pavement from aspects preparation, construction technics quality control, probes into key technologies anti-crack measures for construction. The study result indicates: adopting paving pattern "shear connector + steel fabric concrete" can resolve issues force deck; pre-wetting...