A5035414662- Innovative concrete reinforcement materials
- Concrete and Cement Materials Research
- Innovations in Concrete and Construction Materials
- Smart Materials for Construction
- Concrete Corrosion and Durability
- Surface Modification and Superhydrophobicity
- Carbon Dioxide Capture Technologies
- Mechanical Behavior of Composites
- Fiber-reinforced polymer composites
- Ultrasonics and Acoustic Wave Propagation
- Electrical and Bioimpedance Tomography
- Fire effects on concrete materials
- Advanced machining processes and optimization
- Advanced materials and composites
- Engineering Technology and Methodologies
- Industrial Engineering and Technologies
- Aerogels and thermal insulation
- CO2 Sequestration and Geologic Interactions
- Magnesium Oxide Properties and Applications
- High-Velocity Impact and Material Behavior
- Tunneling and Rock Mechanics
- Structural mechanics and materials
- Geophysical Methods and Applications
- Medical and Biological Sciences
- Natural Fiber Reinforced Composites
Aalto University
2019-2024
Smolensk State Medical University
2020
Current carbon capture and utilization (CCU) technologies require high energy input costly catalysts. Here, an effective pathway is offered that addresses climate action by atmospheric CO2 sequestration. Industrially relevant highly reactive alkali cellulose solutions are used as absorption media. The latter lead to mineralized materials (MCM) at a tailorable cellulose-to-mineral ratio, forming organic-inorganic viscous systems (viscosity from 102 107 mPa s storage modulus 10 105 Pa)....
In this study the boundary zone around polypropylene fibres in hardened cement paste was defined terms of porosity and unhydrated particles using phase contrast tomography with a spatial resolution 0.637μm within volume 1.305×1.305×1.305 mm3. Pores grains were identified from made blended by separating them computed images thresholding method. identification gray-level ranges pores several approaches, such as tangent-slope overflow criterion including cumulative curve image, utilised. The...
This study experimentally examines the relationship between fibre surface roughness, its wettability, and microstructure of cement paste close to fibre. Results indicate that amount water adheres or is retained by grows with increase in roughness. The distributions porosity unhydrated grains, which were produced through analysis BSE images a k-means clustering algorithm up 100μm from surface, revealed decrease both large pores when roughness increased but not clear effect on distribution grains.
Abstract The performance of cementitious composites reinforced with fibres or/and bars depends on the bond strength between inclusion and matrix. nature formation fibre‐matrix is crucial for enhancing reliability utilisation composites. research provides a review recently published result about changes in microstructure cement matrix surrounding steel different surface roughness, using scanning electron microscope (SEM) coupled k ‐means clustering algorithm image segmentation. debonding...
Pull-out tests of fibres were conducted using slow cyclic tension to evaluate the behaviour bond between cement paste and steel with different types surface roughness. Even though load amplitude increases in small steps cycles, development residual slip increment proves absence a complete at beginning loading. During steps, evolves deceleration, steady, acceleration stages. The stiffness during ascending descending parts load-slip curve up last indicating that loading compacts matrix near...
The SEM and EDX methods were used to study both the profile along perimeter of steel fibres composition cement paste close fibre surface. was made clinker blended with slag limestone. results indicate that a wavelength 31.5 μm an amplitude 0.925 represent changes radius on average, which can be estimate size empty spaces particles touching surface may create are able fill these spaces. line analyses in four orthogonal directions from performed step 0.5 lines 60 μm. distributions elements...
Cellulose–CO2 Grapes In article number 2209327, Guillermo Reyes, Orlando J. Rojas, and co-workers demonstrate carbon capture utilization (CCU) in industrially relevant reactive alkali cellulose solutions, which are transformed into hybrid, mineralized materials. They can be molded supports for coral-reef restoration the production of structures to ceramics cement composites (Image: scanning electron microscopy (SEM) image a sample with ca. 7 nm Au/Pt coating, colored according...