Results 51 to 60 of about 873,531 (208)

Preparation, physical-chemical characterisation and cytocompatibility of calcium carbonate cements [PDF]

open access: yes, 2006
The feasibility of calcium carbonate cements involving the recrystallisation of metastable calcium carbonate varieties has been demonstrated. Calcium carbonate cement compositions presented in this paper can be prepared straightforwardly by simply mixing
Bareille, Reine   +3 more
core   +1 more source

Optimization of mix proportion of super-early-strength cement grouting material and experimental study on its working performance

open access: yesAin Shams Engineering Journal
This paper investigates the effect of a novel super-early-strength cement grout composite on water leakage in the shield section of metro tunnels in operation.
Xiaokai Niu   +5 more
doaj   +1 more source

Templating effect of alginate and related biopolymers as hydration accelerators for calcium alumina cement - A mechanistic study

open access: yesMaterials & Design, 2020
In earlier publications it has been demonstrated that alginate and similarly structured biopolymers unexpectedly accelerate the hydration of calcium alumina cement. Here, this effect is investigated by applying 27Al MAS NMR spectroscopy and XRD technique
Alexander Engbert, Johann Plank
doaj   +1 more source

Influence of calcium sulphoaluminoferrite on the cement stone structure [PDF]

open access: yesE3S Web of Conferences, 2020
Usually to obtain expansive cements sulphoaluminate clinker or mix aluminate clinker with calcium sulphates (gypsum, hemihydrate, anhydrate) are used. This paper deals with the composition and properties of solid solution of calcium sulphoaluminoferrite.
Samchenko Svetlana, Zorin Dmitriy
doaj   +1 more source

Achieving sustainable and durable concrete using high‐volume SiO2: Engineering properties, environmental and economic benefits

open access: yesStructural Concrete, EarlyView.
Abstract This study explores the potential of high‐volume amorphous silica (SiO2) replacement for ordinary Portland cement (OPC) in concrete to reduce carbon emissions. Amorphous SiO2, such as silica fume (SF) and CO2 mineralization‐produced Si‐rich gel, offers superior properties to concrete but is under‐researched for its use in concrete with high ...
Xinlin Ji, Lijie Chen, R. K. L. Su
wiley   +1 more source

High temperature behavior of calcium aluminate cement pastes [PDF]

open access: yes, 2020
: Calcium aluminate cements (CAC) are important materials today, as they cover a good number of applications in civil engineering, refractory industry and materials science, which is mainly due to their excellent high temperature mechanical properties ...
Zapata Mesa, John Fernando
core  

Solid-state nuclear magnetic resonance spectroscopy of cements

open access: yesMaterials Today Advances, 2019
Cement is the ubiquitous material upon which modern civilisation is built, providing long-term strength, impermeability and durability for housing and infrastructure.
B. Walkley, J.L. Provis
doaj   +1 more source

Biocompatibility With Osteogenic Potential of Premixed Bioceramic Cements for Use in Apical Surgery

open access: yesAustralian Endodontic Journal, EarlyView.
ABSTRACT This study investigated the biocompatibility and osteogenic potential of premixed bioceramic cements (PBCs)—CeraPutty, EndoCEM MTA Premixed, Well‐Root PT, and One‐Fil PT Injectable—as alternatives to mineral trioxide aggregate for retrograde filling in endodontic microsurgery.
Yesol Kim   +5 more
wiley   +1 more source

Mortars From Punic and Hellenistic–Roman Solunto: Materials, Formulations, and Technology

open access: yesArchaeometry, EarlyView.
ABSTRACT This study presents an archaeometric investigation of 18 hydraulic rendering and bedding mortars from Punic and Hellenistic–Roman Solunto (NW Sicily). The research aimed to characterize raw materials, reconstruct manufacturing sequences, and evaluate technological proficiency through mineralogical and petrochemical analyses.
G. Montana   +4 more
wiley   +1 more source

Desenvolvimento de aglomerantes ecoeficientes com encapsulamento de metais pesados [PDF]

open access: yes, 2014
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Civil, Florianópolis, 2014.A produção de aglomerantes para uso na construção civil gera impactos ambientais em vários países do ...
Manfroi, Eliz Paula
core  

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