Results 141 to 150 of about 593,300 (377)

Chemical Stability and Bond Strength of Endodontic Sealers Exposed to Acidic, Alkaline and Protein‐Rich Environments: An In Vitro Investigation

open access: yesAustralian Endodontic Journal, EarlyView.
ABSTRACT The sealing performance of endodontic sealers may be influenced by environmental factors such as pH and blood‐derived proteins. This in vitro study evaluated the effects of pH variation and protein contamination on calcium ion (Ca2+) release and push‐out bond strength (BS) of a calcium silicate‐based sealer (Bio‐C Sealer) and an epoxy resin ...
Walter Raucci‐Neto   +6 more
wiley   +1 more source

Understanding silicate hydration from quantitative analyses of hydrating tricalcium silicates

open access: yesNature Communications, 2016
Despite its importance to the cement industry, tricalcium silicate hydration, with its sequence of induction, acceleration and deceleration steps, still hosts many open questions.
Elizaveta Pustovgar   +6 more
doaj   +1 more source

Influence of Drying Protocol on the Setting and Crystalline Phase Formation of Calcium Silicate‐Based Sealers

open access: yesAustralian Endodontic Journal, EarlyView.
ABSTRACT The objective of this study was to assess the hydration, crystalline structure, and setting of bioceramic ready‐to‐use and powder/liquid sealers in dry and wet root canal dentine. Thirty‐two single‐rooted human teeth were embedded in acrylic resin and sectioned into 2‐mm segments.
Thiago Bessa Marconato Antunes   +8 more
wiley   +1 more source

Phase formation and carbonation impact on the strength of alkali-activated demolition waste with calcium compounds

open access: yesCase Studies in Construction Materials
The present study evaluates the impact of calcium compounds on the reaction kinetics of alkali-activated construction demolition waste. Two materials, concrete and brick demolition waste, were milled to powders and supplemented with either carbonated ...
Isabelle Wichmann, Dietmar Stephan
doaj   +1 more source

Development of methods for preparing fly ash for separation by activation [PDF]

open access: yes, 2018
Purpose. Isolation of the aluminosilicate fraction from fly ash, study of physical and mechanical properties of binders obtained from TPP wastes. Methods.
Netyaga, O.B.   +8 more
core  

Production of arsenical bronze using speiss on the Elephantine Island (Aswan, Egypt) during the Middle Kingdom (Middle Bronze Age) (c.2000–1650 BCE)

open access: yesArchaeometry, EarlyView.
Abstract This paper presents the first direct evidence of the slags produced during the cementation alloying process of Cu with speiss inside ceramic crucibles, thus representing Cu alloying with As in Middle Kingdom Egypt. The settlement deposits from the Middle Bronze Age were excavated on Elephantine Island, within modern Aswan.
Jiří Kmošek, Martin Odler
wiley   +1 more source

Hydration of ferrite-rich Portland cement: Evaluation of Fe-hydrates and Fe uptake in calcium-silicate-hydrates

open access: green, 2021
Natsumi Noguchi   +5 more
openalex   +2 more sources

Medicine for the Material World

open access: yesArchaeometry, EarlyView.
ABSTRACT It is clear that many of the inorganic materials of antiquity have been used both as medicines for human ills and also as agents in technological processes. This paper speculates that there might have been a stronger link between these two functions in the past, based on the concept of “active agents”—materials that are efficacious at curing ...
A. M. Pollard
wiley   +1 more source

Graphene Nanosheets to Improve Physico-Mechanical Properties of Bioactive Calcium Silicate Cements [PDF]

open access: gold, 2017
Nileshkumar Dubey   +4 more
openalex   +1 more source

Development of durable “green” concrete exposed to deicing chemicals via synergistic use of locally available recycled materials and multi-scale modifiers [PDF]

open access: yes, 2018
From the economic and social perspectives, the use of waste materials would not be attractive until their costs and quality can satisfy the construction requirements.
Cui, Na, Xie, Ning
core  

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