Personne
Paul Bowen
Publications associées (115)
Atomic-Level and Surface Structure of Calcium Silicate Hydrate Nanofoils
Karen Scrivener, Paul Bowen, Aslam Kunhi Mohamed, Ziga Casar
Deciphering the calcium silicate hydrate (C-S-H) surface is crucial for unraveling the mechanisms of cement hydration and property development. Experimental observations of C-S-H in cement systems suggest a surface termination which is fundamentally differ ...
AMER CHEMICAL SOC2023A method for the reliable and reproducible precipitation of phase pure high Ca/Si ratio (>1.5) synthetic calcium silicate hydrates (C-S-H)
Karen Scrivener, Paul Bowen, Maya Nicole Harris, Grace Simpson
Various methods have been developed to synthesize C-S-H; however, these methods have only allowed for the successful production of pure-phase C-S-H with Ca:Si of 1.5 or less. Attempts to form higher Ca:Si ratios by these methods gives C-S-H (Ca:Si 1.5 or l ...
PERGAMON-ELSEVIER SCIENCE LTD2022Effect of minor amounts of beta-calcium pyrophosphate and hydroxyapatite on the physico-chemical properties and osteoclastic resorption of beta-tricalcium phosphate cylinders
Paul Bowen, Gabrielle Anne Laguisma Sblendorio
beta-Tricalcium Phosphate (beta-TCP), one of the most used bone graft substitutes, may contain up to 5 wt% foreign phase according to standards. Typical foreign phases include beta-calcium pyrophosphate (beta-CPP) and hydroxyapatite (HA). Currently, the ef ...
KEAI PUBLISHING LTD2022Iron incorporation in synthetic precipitated calcium silicate hydrates
David Lyndon Emsley, Paul Bowen, Brennan James Walder, Jirawan Siramanont
Effect of Fe3+ on the precipitation of synthetic calcium silicate hydrates (C-S-H) under controlled conditions has been evaluated. Using extremely basic either initial calcium nitrate or sodium silicate solutions (pH > 11), incipient formation of ferrihydr ...
2021Understanding of the factors slowing down metakaolin reaction in limestone calcined clay cement (LC3) at late ages
Karen Scrivener, Paul Bowen, Yosra Briki, Mohsen Ben Haha, François Henri Avet
Factors which could explain the slowing down of the metakaolin reaction in LC3 blends are investigated. Portlandite availability and the presence of aluminium ions in the pore solution are shown not to be limiting factors. Hydrates can only precipitate in ...
PERGAMON-ELSEVIER SCIENCE LTD2021Interactions of Tris with rutile surfaces and consequences for in vitro bioactivity testing
Tris(hydroxymethyl)aminomethane (Tris) has been used as the buffer in bioactivity testing for over two decades and has become a standard choice for the scientific community. While it is believed to be non-interacting, the extent of its interactions with ti ...
Amsterdam2021The Atomic-Level Structure of Cementitious Calcium Aluminate Silicate Hydrate
David Lyndon Emsley, Karen Scrivener, Paul Bowen, Pierrick Berruyer, Brennan James Walder, Pinelopi Moutzouri, Aslam Kunhi Mohamed, Jirawan Siramanont, Maya Nicole Harris, Mattia Negroni
Despite use of blended cements containing significant amounts of aluminum for over 30 years, the structural nature of aluminum in the main hydration product, calcium aluminate silicate hydrate (C-A-S-H), remains elusive. Using first-principles calculations ...
AMER CHEMICAL SOC2020Cathodoluminescent screen imaging system for seeded blob detection in toroidal plasma experiment
Ambrogio Fasoli, Ivo Furno, Paolo Ricci, Paul Bowen, Marcelo Baquero Ruiz, Carlos Morais, Fabian Manke
We designed and built a diagnostic based on a cathodoluminescent screen for the detection of turbulent plasma structures with high spatial resolution. The screen is coated with a low threshold energy cathodoluminescent powder that emits light when exposed ...
2020Global uncertainty-sensitivity analysis on mechanistic kinetic models: From model assessment to theory-driven design of nanoparticles
Paul Bowen, Andrea Testino, Agnese Carino, Mohammad Reza Andalibi
Recently, we developed a population balance framework describing the precipitation of calcium-silicate-hydrate, a key nanomaterial in the construction industry and with potential applications in biomedicine, environmental remediation, and catalysis. In thi ...
2020Spark Plasma Sintering of Ceramics: From Modeling to Practice
Paul Bowen, Michael Stuer, Zhe Zhao
Summarizing the work of nearly a decade of research on spark plasma sintering (SPS), a review is given on the specificities and key factors to be considered in SPS of ceramic materials, based on the authors’ own research. Alumina is used primarily as a mo ...
2020