Results 21 to 30 of about 14,253 (226)

Mechanical, freeze-thaw, and sorptivity properties of mortars prepared with different cement types and waste marble powder

open access: yesJournal of Sustainable Construction Materials and Technologies, 2023
The cement production process contributes significantly to CO2 gas emissions and environ- mental pollution. To reduce this adverse effect, the substitution of waste marble powder as a cement additive was investigated.
Rumeysa Gürgöze   +2 more
doaj   +1 more source

Another look at the deterioration of calcium aluminate cement concrete

open access: yesMateriales de Construccion, 1996
Potential degradation of concrete structures made of calcium aluminate cement (CAC) is well known and is caused by transformation (conversion) of the thermodynamically metastable into stable calcium aluminate hydrate phases.
Jaromir Jambor, Jan Skalny
doaj   +1 more source

Changes in the rate of ion penetration of alternative cementitious materials with time

open access: yesMaterials & Design, 2021
A major concern with concrete durability is the penetration of ions that cause deterioration. One concern about alternative cementitious materials (ACMs) is the lack of information regarding their long-term resistance to ion penetration.
Amir Behravan   +3 more
doaj   +1 more source

From Molten Calcium Aluminates through Phase Transitions to Cement Phases

open access: yesAdvanced Science, 2020
Crystalline calcium aluminates are a critical setting agent in cement. To date, few have explored the microscopic and dynamic mechanism of the transitions from molten aluminate liquids, through the supercooled state to glassy and crystalline phases ...
Hao Liu   +12 more
doaj   +1 more source

Estimation of corrosion resistance of curing mixtures based on coal-bearing rocks from Western Donbass [PDF]

open access: yes, 2016
Purpose. Substantiation of possible use of coal-bearing rocks as a replacement for a part of the filler in the preparation of shotcrete for lining of mine workings in the conditions of mineralized mine water. Methods.
Harkusha, V, Kovalenko, V
core   +2 more sources

Supercritical carbonation of calcium aluminate cement

open access: yesCement and Concrete Research, 2008
The microstructural changes occurring during supercritical carbonation (scCO2) of calcium aluminate cement (CAC) and changes to its strength have been investigated. Cylindrical specimens of CAC cured at different temperatures were prepared and then subjected to scCO2.
Fernández Carrasco, Lucía   +2 more
openaire   +3 more sources

Physical properties and hydration evolution of dispersant containing calcium aluminate cement compositions for endodontic applications

open access: yesCerâmica, 2014
The purpose of this study was to evaluate the physical properties and hydration evolution of calcium aluminate cement (CAC) compositions containing an advanced dispersant. The compressive strength, dimensional change, apparent porosity and quantitative X
A. P. Luz, V. C. Pandolfelli
doaj   +1 more source

ANALYSIS OF CALCIUM ALUMINATE CEMENT PASTES [PDF]

open access: yes, 2020
In this research different formulations of calcium aluminate cement pastes (CACP) with 71wt% Al2O3 (CACP 71wt%), (wt% -percentage by weight) were made, at 0.4 water to cement ratios (W/C), with additions of 0wt%, 10wt% and 20wt% of silica (CACP 71-0wt%, 10wt% and 20wt%, respectively).
John Zapata   +2 more
openaire   +1 more source

Natural fiber-reinforced light-weight cement blocks prepared from waste for sustainable development

open access: yesActa Polytechnica CTU Proceedings, 2022
Low density of the light-weight cement blocks offers an advantage in terms of dead load reduction, which is advantageous in structural design-reduction of size and numbers of load-carrying structural components is possible.
Latda Chandeng   +5 more
doaj   +1 more source

Biocompatibility of mineral trioxide aggregate and three new endodontic cements: An animal study

open access: yesDental Research Journal, 2012
Background: Introducing new endodontic cements should await comprehensive investigations and new formulations have to be tested in vivo before applying in human beings.
Mohammad-Ghasem Aminozarbian   +3 more
doaj   +1 more source

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