A5021023820- Concrete and Cement Materials Research
- Innovative concrete reinforcement materials
- Advanced ceramic materials synthesis
- Glass properties and applications
- Magnesium Oxide Properties and Applications
- Innovations in Concrete and Construction Materials
- Recycling and utilization of industrial and municipal waste in materials production
- Building materials and conservation
- Layered Double Hydroxides Synthesis and Applications
- Metallurgical Processes and Thermodynamics
- Calcium Carbonate Crystallization and Inhibition
- Mine drainage and remediation techniques
- Ferroelectric and Piezoelectric Materials
- Clay minerals and soil interactions
- X-ray Diffraction in Crystallography
- Dyeing and Modifying Textile Fibers
- Advanced materials and composites
- Nuclear materials and radiation effects
- Additive Manufacturing and 3D Printing Technologies
- CO2 Sequestration and Geologic Interactions
- Adsorption and biosorption for pollutant removal
- Phosphorus and nutrient management
- Iron and Steelmaking Processes
- Bone Tissue Engineering Materials
- Concrete Properties and Behavior
Federal Institute For Materials Research and Testing
2016-2023
GFZ Helmholtz Centre for Geosciences
2012
Abstract Slags from the nonferrous metals industry have great potential to be used as feedstocks for production of alkali‐activated materials. Until now, however, only very limited information has been available about structural characteristics these In work presented herein, synthetic slags in CaO–FeO x –SiO 2 system, representing typical compositions Fe‐rich slags, and inorganic polymers (IPs) produced by activation with alkali silicate solutions studied means X‐ray absorption near‐edge...
The impact of high additions vegetable oil (12 vol.%) on the mechanical and microstructural properties metakaolin-slag-based alkali-activated materials (AAMs) was studied. addition resulted in a slight decrease initial polymerization kinetics but did not affect final degree reaction. AAM-oil-composite-mortars exhibited approximately ∼30% lower compressive strength primarily due to entrainment air voids. Newly formed soap phases significantly reduced volume small capillary gel pores (pore...
Abstract Future lunar exploration will be based on in-situ resource utilization (ISRU) techniques. The most abundant raw material the Moon is regolith, which, however, very scarce Earth, making study of simulants a necessity. objective this to characterize and investigate sintering behavior EAC-1A regolith simulant. characterization simulant included determination phase assemblage, characteristic temperatures water content analysis. results are discussed in context experiments simulant,...
Abstract There is an ongoing debate on European scale concerning the criticality of phosphorus. In Switzerland and Germany, phosphorus recovery from phosphorus-rich waste streams will become obligatory. Sewage sludge ash rich in may important secondary feedstock. Thermochemical treatment sewage with sodium sulphate under reducing conditions was shown to remove heavy metals solid product produce fully plant available crystalline phase CaNaPO 4 . Pilot-scale experiments a rotary kiln were...
Abstract By the combination of an optimized granulometry, a reduced water–cement ratio and use superplasticizers ultra‐high performance concrete achieves compressive strength over 150 N/mm 2 high resistance regarding acids water‐soluble salts. In different research projects effect autoclavation on mechanical phase composition was analyzed. systematic studies, mix process parameters were varied. The results show that leads to improved pozzolanic hydraulic reaction significantly improves...
Abstract Several studies show that thermal and hydrothermal treatment can further improve the excellent properties of UHPC in terms mechanical strength durability. While for increase is attributed to an intensified pozzolanic hydraulic reaction, previous accredited it mostly formation tobermorite. In presented study samples was systematically varied phase analysed related development a reference sample cured 28 days water. For results depends on protection against desiccation be ascribed...
Alkali–silica reaction (ASR) is a chemical within concrete which can lead over time to cracking and spalling. Due the complexity of problem, it still causes damage constructions worldwide. The study aims illustrate interdisciplinary research German Federal Institute for Materials Research Testing (BAM) last 20 years, considering all aspects ASR topics from macro‐ micro‐level. First, methods characterization assessment risks products used at BAM are explained classified in international...
Additive manufacturing (AM) of alkali-activated materials is a promising method for producing ceramic precursors, construction elements and other parts. A recently introduced AM process laser-induced slip casting lithium aluminate/microsilica slurries, which yields parts with excellent mechanical strengths. To clarify the underlying mechanisms, μ-Raman spectroscopy was applied to produced by process, dissolution hydration aluminate studied inter alia using conventional in-situ X-ray...
An experimental procedure for securing an oxygen balance is given using a typi cal bleach formula with cotton. Data are graphically presented showing decom position of peroxide, evolution oxygen, and consumption as func tions time. Oxygen suggested parameter evaluating bleaching systems. It indicated that data in conjunction obtain able by other known tests can provide insight into otherwise not obtainable.
Abstract Hydrous lithium aluminosilicate (L–A–S–H) and aluminate (L–A–H) gels are candidate precursors for glass‐ceramics ceramics with potential advantages over conventional processing routes. However, their structure before calcination remained largely unknown, despite the importance of precursor on properties resulting materials. In present study, it is demonstrated that L–A–S–H L–A–H Li/Al ≤ 1 can be produced via an organic steric entrapment route, while higher ratios lead to...
Powder X-ray diffraction is a time-consuming and challenging task, especially for preparation of sensitive phases like ettringite calcium-silicate-hydrate (C-S-H) phases. Fine-grained ultrahigh-performance concrete (UHPC) with an average grain size <100 μm could be investigated directly without milling. As proof concept, small UHPC cylinders plain surfaces were newly designed sample holder. The comparison conventionally prepared powder shows the feasibility fast qualitative phase analysis...
Fused cement clinker can be produced from molten basic oxygen furnace slag (BOFS) by way of a reductive thermochemical treatment. During the treatment, oxidic iron is reduced to metallic and separated. The resulting low-iron has chemical mineralogical composition similar ordinary Portland (OPC) clinker. In this study, hydraulic reactivity fused BOFS with without gypsum was investigated using isothermal calorimetry, differential scanning in situ X-ray diffraction powder diffraction....