Results 31 to 40 of about 2,529,989 (344)
Fractal and Fractional, 2021 In cement-based materials, alkalis mainly exist in the form of different alkali sulfates. In this study, the impacts of different alkali sulfates on the shrinkage, hydration, pore structure, fractal dimension and microstructure of low-heat Portland ...
Li Yang +6 more
semanticscholar +1 more source
Multiscale understanding of tricalcium silicate hydration reactions [PDF]
, 2017 Tricalcium silicate, the main constituent of Portland cement, hydrates to produce crystalline calcium hydroxide and calcium-silicate-hydrates (C-S-H) nanocrystalline gel. This hydration reaction is poorly understood at the nanoscale.
Cuesta-García, Ana María +8 more
core +4 more sources
Long-term Exothermic Characteristics and Hydration Mechanism of Low-heat Portland Cement Mixed with Fly Ash Based on Thermodynamic Calculation [PDF]
长江科学院院报[Objective] This study aims to reveal the exothermic properties and hydration mechanism of low-heat Portland cement (LHC) (hereafter referred to as low-heat cement) mixed with fly ash, the composition of pore solution during hydration, and the evolution ...
CUI Jin-yang, LI Shu-guang, LI Wen-wei, YANG Hua-mei, ZHANG Duo, ZHANG Kai-lai
doaj +1 more source
Case Studies in Construction Materials, 2023 In order to explore the applicability of different cementitious paste systems used for massive concrete structures, the hydration characteristics and mechanism of the binary and ternary cementitious paste systems in Portland cement pastes containing fly ...
Xingwang Sheng +4 more
doaj +1 more source
Efeito da pré-molhagem do agregado nas propriedades das argamassas com agregado reciclado deconcreto e agregado leve [PDF]
, 2019 This paper examines the suitability of partially replacing natural aggregate, sand, (NA) with recycled concrete aggregate (RCA) or lightweight aggregate (LWA) in mortars, under the hypothesis that pre-wetting aggregates would produce improvement in ...
Aponte Hernández, Diego Fernando +3 more
core +4 more sources
, 2020 In this paper, the effect of nano-silica on the autogenous shrinkage, hydration heat, compressive strength hydration products of Ultra-High Strength Concrete (UHSC) is studied. The water/binder ratio (w/b) of UHSC is 0.2.
Guang-Zhu Zhang +2 more
semanticscholar +1 more source
Morphological and Structural Evaluation of Hydration/Dehydration Stages of MgSO4 Filled Composite Silicone Foam for Thermal Energy Storage Applications [PDF]
, 2020 Salt hydrates, such as MgSO4·7H2O, are considered attractive materials for thermal energy storage, thanks to their high theoretical storage density. However, pure salt hydrates present some challenges in real application due to agglomeration, corrosion ...
Brancato, Vincenza +9 more
core +2 more sources
Effect of Fly Ash Belite Cement on Hydration Performance of Portland Cement
Crystals, 2021 Fly ash belite cement is a green, low carbon cementitious material, mainly composed of hydraulic minerals of dicalcium silicate and calcium aluminate.
Yongfan Gong +3 more
doaj +1 more source
Rietveld Quantitative Phase Analysis of Oil Well Cement: in Situ Hydration Study at 150 Bars and 150 °C [PDF]
, 2019 Oil and gas well cements are multimineral materials that hydrate under high pressure and temperature. Their overall reactivity at early ages is studied by a number of techniques including through the use of the consistometer.
Cuesta-Garcia, Ana Maria +5 more
core +6 more sources
Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2019 In the article the technique of an assessment of modes of operation of the heat engineering equipment used for heat treatment of concrete products in the conditions of programcontrolled heat supply according to the pattern of “heating – isothermal ...
A. M. Niyakovskii +3 more
doaj +1 more source