Results 21 to 30 of about 873,531 (208)
Influence of mixing solution on characteristics of calcium aluminate cement modified with sodium polyphosphate [PDF]
, 2020 This study investigated characteristics of a calcium aluminate cement modified with a phosphate (CAP) by changing an amount and concentration of mixing solution with sodium polyphosphate.
García-Lodeiro, Inés +5 more
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Open Ceramics, 2023 The mechanism of growth and decomposition of calcium aluminate cement hydrate phases (CAH phases), which determine the drying behaviour of calcium aluminate bonded castables are not well understood.
B. Noll, T. Stein, O. Krause, R. Simmat
doaj +1 more source
The effect of alginates on the hydration of calcium aluminate cement
Carbohydrate Polymers, 2020 The hydration of calcium aluminate cement (CAC) in the presence of sodium alginate which is known to slightly retard Portland cement, was studied using heat flow calorimetry and mortar strength testing. Most surprisingly, addition of alginate resulted in an earlier occurrence of the maximal heat release as well as an increased early strength, thus ...
Alexander Engbert +2 more
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Journal 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
ANALYSIS OF CALCIUM ALUMINATE CEMENT PASTES [PDF]
, 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
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Environmental Impact and Sustainability of Calcium Aluminate Cements [PDF]
Sustainability, 2022 This investigation presents a critical analysis of calcium aluminate cements (CAC), specifically associated with sustainability and environmental impact, and the potential of these cements to help solve certain worldwide problems. Areas of research include cements as recycling holding materials, sustainability, circular economy, production costs, and ...
John Zapata +4 more
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Another look at the deterioration of calcium aluminate cement concrete
Materiales 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
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From Molten Calcium Aluminates through Phase Transitions to Cement Phases
Advanced 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
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Changes in the rate of ion penetration of alternative cementitious materials with time
Materials & 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
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Phosphate-modified calcium aluminate cement for radioactive waste encapsulation [PDF]
, 2013 The present study is part of a wider investigation to develop an alternative cementing system for the encapsulation of problematic low and intermediate level radioactive waste. It has been suggested that alternative cementing systems, with lower internal
Utton, C. +3 more
core +1 more source