A5091389687- Concrete and Cement Materials Research
- Innovative concrete reinforcement materials
- Concrete Properties and Behavior
- Innovations in Concrete and Construction Materials
- Magnesium Oxide Properties and Applications
- Concrete Corrosion and Durability
- Building materials and conservation
- Recycling and utilization of industrial and municipal waste in materials production
- Advanced ceramic materials synthesis
- CO2 Sequestration and Geologic Interactions
- Corrosion Behavior and Inhibition
- Drilling and Well Engineering
- Recycled Aggregate Concrete Performance
- Grouting, Rheology, and Soil Mechanics
- Smart Materials for Construction
- Environmental Impact and Sustainability
- Calcium Carbonate Crystallization and Inhibition
- Microbial Applications in Construction Materials
- Enhanced Oil Recovery Techniques
- Materials Engineering and Processing
- Geophysical Methods and Applications
- Clay minerals and soil interactions
- Infrastructure Maintenance and Monitoring
- Fire effects on concrete materials
- Phase Change Materials Research
Technical University of Darmstadt
2016-2025
Technical University of Munich
2023
Delft University of Technology
2013-2014
University of Zagreb
2007-2014
In order to gain a deeper understanding of the rheological development hydrating ordinary Portland cement (OPC) pastes at initial state, and better understand their underlying processes, quantitative X-ray diffraction (XRD) analysis measurements were conducted results combined. The time-dependent relation between phase flow behavior paste was investigated two different temperatures (20 30 °C), over period hours. Regarding during hydration, ettringite precipitation identified as dominant...
Metakaolin (MK) has emerged as a highly promising supplementary material in low carbon binders for the construction industry. In wide range of applications, from lime to cement–based materials, its hardening performance relies on pozzolanic reactivity between MK and calcium hydroxide (CH), resulting formation diverse calcium-aluminate/silicate hydrates. The reaction sequence is affected by specific conditions dictated binder system employed various applications. To advance design that reduce...
A thorough characterization of base materials is the prerequisite for further research. In this paper, data reference (CEM I 42.5 R, limestone powder, calcined clay and a mixture these three components) used in second funding phase priority program 2005 German Research Foundation (DFG SPP 2005) are presented under aspects chemical mineralogical composition as well physical properties. The were collected based on tests performed by up to eleven research groups involved cooperative program.
Representative elementary volumes (REV) are of major importance for modeling the transport properties multi-scale porous materials. REVs can be used to schematize heterogeneous microstructures and form basis a numerical analysis. In this paper, most appropriate REV size mass in hydrating cement paste is investigated. Numerous series (264) virtual three-dimensional (3D) with different porosities pore morphologies were generated using Hymostruc, simulation model hydration microstructure...
In this study, a multi-proxy approach combining 29Si, 27Al and 1H MAS-NMR, FEG-EPMA, XANES at the Cu K-edge XRD analytics with hydrochemical tools such as ICP-OES analyses, oxygen-isotope signatures, thermodynamic modelling was applied to K-silicate-activated metakaolin specimens - without CuSO4·5H2O addition exposed sulfuric acid pH = 2 for 35 days. The results revealed multistage deterioration mechanism governed by (i) diffusion, (ii) leaching of K-A-S-H, (iii) microstructural damage...
Metakaolin (MK) is a high-quality, reactive nanomaterial that holds promising potential for large-scale use in improving the sustainability of cement and concrete production. It can replace due to its pozzolanic reaction with calcium hydroxide water form cementitious compounds. Therefore, understanding dissolution mechanism crucial fully comprehending reactivity. In this study, we present an approach computing activation energies required metakaolin silicate units at far-from-equilibrium...
Graphene-based materials are considered excellent candidates to implement cementitious nanocomposites due their mechanical properties. This paper presents a comprehensive interface interaction that ends up with computing the elastic properties for four models of C–S–H gel, taking tobermorite 14 Å as an example, reduced graphene oxide (rGO) form reinforced (tobermorite) within density functional theory. We found upon relaxing model structures, dissociation hydroxyl groups from hydroxyl/rGO...
In injection-well carbon storage projects, the degradation of Portland cement under harsh CO2 conditions is a primary concern. This study introduces novel CO2-resistant calcium aluminate (CAC) systems with addition rubber latex and hollow glass microspheres which are added to system enhance set resistance corrosion in same time optimize it for application wide variety well conditions. After exposure near supercritical (100 °C, 7 MPa) these exhibited enhanced compressive strength reduced...
In the quest for environmentally sustainable binders within construction industry, metakaolin (MK) has emerged as a highly promising material. Its reactivity and hardening performance encompass wide range of applications, spanning from lime to cement-based materials. This is primarily underpinned by pozzolanic reaction with calcium hydroxide (CH), leading formation various aluminate silicate hydrates. The intricacies hydration kinetics resultant products hinge on several factors woven into...
The urgent need to address climate change has pushed Europe the forefront of environmental legislation initiatives, such as Environment Action Program (EAP) within European Green Deal and disclosure Environmental Product Declarations (EPDs) in construction sector. cement industry plays a vital role this transition because it is one biggest contributors greenhouse gas emissions worldwide. EPDs have managed articulate information flow across different stakeholders, allowing them incorporate...
There is an increased interest in the reuse of ash waste from biomass combustion, being a sustainable source energy.This paper investigates partial replacement cement and sand building materials with fly generated combustion woody waste.The results show that widens particle size distribution has minerals complementary to portland cement, thus justifying its application as replacement, but relatively high amount free CaO MgO may exert significant expansion.With addition, rate hydration,...
Portlandite, as a most soluble cement hydration reaction product, affects mechanical and durability properties of cementitious materials. In the present work, an atomistic kinetic Monte Carlo (KMC) upscaling approach is implemented in MATLAB code order to investigate dissolution time morphology changes hexagonal platelet portlandite crystal. First, rate constants individual Ca events are computed by transition state theory equation based on inputs activation energies (ΔG*) obtained through...