A5038354347- Concrete and Cement Materials Research
- Innovative concrete reinforcement materials
- Building materials and conservation
- Magnesium Oxide Properties and Applications
- CO2 Sequestration and Geologic Interactions
- Concrete Corrosion and Durability
- Surface Modification and Superhydrophobicity
- Soil and Unsaturated Flow
- Microbial Applications in Construction Materials
- Grouting, Rheology, and Soil Mechanics
- Nanopore and Nanochannel Transport Studies
- Membrane Separation Technologies
- Smart Materials for Construction
- Calcium Carbonate Crystallization and Inhibition
- Glass properties and applications
- Minerals Flotation and Separation Techniques
- Clay minerals and soil interactions
- Crystallization and Solubility Studies
- Ion-surface interactions and analysis
- Groundwater flow and contamination studies
- Aerogels and thermal insulation
- Advanced ceramic materials synthesis
- Corrosion Behavior and Inhibition
- Structural Behavior of Reinforced Concrete
- Iron oxide chemistry and applications
Qingdao University of Technology
2021-2024
Qingdao University of Science and Technology
2024
Wuhan University
2024
Declining strength is a key limitation for the promotion and application of rubber–cement-based composites. Silane coupling agents (SCAs) provide new idea improving weak interface materials, but mechanism SCA modification in improvement mechanical properties not well established. In this paper, first time, multi-scale exploration SCA-modified materials was conducted to explore effect reveal using combination experiments simulations. The experimental results showed that KH570-modified...
The application of supplementary cementitious materials (SCMs) in concrete can improve its durability the marine environment. Calcium alumino silicate hydrate (CASH) is main hydration product SCMs; however, to date, mechanism wetting discrepancy CASH with different Al/Si ratios has not been revealed at molecular scale. Herein, dynamics simulation method was used study wettability water nanodroplets on surface substrates ratios, aiming reveal influence gel Al contents molecules. results...
The application of silane in sulfoaluminate cement repair materials can improve its waterproof, permeability, freeze-thaw, and other properties, but it would reduce the mechanical properties cement-based materials, making unable to better meet engineering requirements durability indices. modification with graphene oxide (GO) effectively address this issue. However, failure mechanism interface between GO remain unclear. In paper, interface-bonding models isobutyltriethoxysilane...
An investigation was carried out to study the influence of two types anti-washout admixtures (AWAs) on performance underwater concrete, specifically, workability and washout resistance. The tested AWAs were hydroxypropyl methylcellulose (HPMC) polyacrylamide (PAM) as nonionic carboxymethyl starch (CMS) polyanionic cellulose (PAC) anionic AWAs. Rheological properties (slump slump flow), resistance, compressive strength measured evaluate fresh hardened concrete. results indicate that are more...
The use of rapid-hardening cementitious materials for the emergency repair critical infrastructure in coastal environments is becoming increasingly widespread, and concrete surface hydrophobic protection treatment equally necessary to improve durability both new old concrete. Among them, silane-based play an important role protection. Graphene oxide (GO)-modified silane can significantly performance coatings, but mechanism coatings modifying sulfoaluminate cement’s main hydration product...
Nitrite is an effective corrosion inhibitor that can inhibit the of steel reinforcement and extend service life reinforced concrete. The transport speed nitrite in cement micro-porous channels determines anti-corrosion effect reinforcing steel. In this paper, behavior three inhibitors, namely LiNO 2 , Ca(NO ) NaNO investigated based on molecular dynamics simulations finds NO − has fastest channels. ions’ local structure dynamic ions analysis reveal ion clusters pores adsorption determine...
Compared with polymer-modified ordinary-Portland-cement-based materials, research on cement materials based sulfoaluminate is still in the preliminary stage and lacks an understanding of mechanism interaction interface. The aim this work to study bond performance ettringite, main hydration product cement, various types polymers using molecular dynamics methods. Steered were used simulate separation polyamide (PA), polyethylene glycol (PEG), polyacrylic acid (PAA) polypropylene (PP) from...
The distribution state and wettability of water molecules on the CSH surface closely affect transport behavior gel pores, thus affecting durability concrete. To understand wetting droplets interface with different Ca/Si ratios, this paper focuses local structure, ionic bonds, hydrogen orientation characteristics dynamic properties based molecular dynamics simulation. At level, have a larger contact angle at low ratio because has dense structure makes it difficult for to penetrate into...