Results 1 to 10 of about 6,182,869 (354)
Effect of Soda Residue Addition and Its Chemical Composition on Physical Properties and Hydration Products of Soda Residue-Activated Slag Cementitious Materials. [PDF]
Materials (Basel), 2020 Soda residue (SR), the solid waste of Na2CO3 produced by ammonia soda process, pollutes water and soil, increasing environmental pressure. SR has high alkalinity, and its main components are Ca(OH)2, NaCl, CaCl2, CaSO4, and CaCO3, which accords with the ...
Lin Y, Xu D, Zhao X.
europepmc +2 more sources
Hydration characteristics, hydration products and microstructure of reactive powder concrete
Journal of Building Engineering, 2023 Yes Reactive Powder Concrete (RPC) is a new type of cementitious materials with a complex hydration mechanism, and active admixtures greatly influence the hydration reaction, formation of hydration products, and evolution of microstructure. In order to comprehensively study the quantitative effects of active admixtures contents, namely silica fume ...
Wenjie Ge +10 more
openaire +3 more sources
Effect of Graphene Oxide (GO) on the Morphology and Microstructure of Cement Hydration Products. [PDF]
Nanomaterials (Basel), 2017 In this study, the effects of graphene oxide (GO) on the microstructure of cement mortars were studied using scanning electron microscopy (SEM), thermogravimetric (TG), and X-ray diffraction (XRD) techniques.
Wang L +6 more
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Effect of Ultrafine Additives on the Morphology of Cement Hydration Products
Crystals, 2021 The present research is focused on the investigation of the influence of ultrafine additives on the structure formation of hardened cement paste and the establishment of the mechanisms of the morphological transformations, which determine the properties ...
Grigory Yakovlev +8 more
doaj +2 more sources
A Scanning Transmission X-ray Microscopy Study of Cubic and Orthorhombic C₃A and Their Hydration Products in the Presence of Gypsum. [PDF]
Materials (Basel), 2016 This paper shows the microstructural differences and phase characterization of pure phases and hydrated products of the cubic and orthorhombic (Na-doped) polymorphs of tricalcium aluminate (C₃A), which are commonly found in traditional Portland cements ...
Rheinheimer V +5 more
europepmc +9 more sources
Pozzolanic Reactivity and Hydration Products of Hedenbergite
Chemical Engineering Transactions, 2017 With hedenbergite, desulfurized gypsum and calcium hydroxide as the materials, this paper studies the pozzolanic reactivity of finely ground hedenbergite and performs XRD, IR, NMR and SEM analysis on the hydration products of the neat paste specimens ...
Biyao Geng +7 more
doaj +2 more sources
Buildings, 2023 The temperature stress caused by the large temperature difference is the main factor causing harmful cracks in large-volume concrete. The introduction of admixtures is beneficial to reduce the temperature difference inside and outside the large-volume ...
Liguo Wang +8 more
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Ultrasonic sound speed analysis of hydrating calcium sulphate hemihydrate \ud [PDF]
, 2011 This article focuses on the hydration, and\ud associated microstructure development, of b-hemihydrate\ud to dihydrate (gypsum). The sound velocity is used to\ud quantify the composition of the fresh slurry as well as the\ud hardening and hardened—porous ...
Brouwers, H.J.H., Korte, A.C.J. de
core +17 more sources
Case Studies in Construction Materials, 2022 There is limited measure available to quantify the effect of polycarboxylate-ether based superplasticizer (PCE) on the microstructure of cement-based systems during the first 24 h.
Weiwei Zhu +4 more
doaj +1 more source
Minerals, 2022 Cement companies are significant contributors of the planet’s anthropogenic CO2 emissions. With increased awareness of the substantial volume of CO2 emissions from cement production, a variety of mitigation strategies are being considered and pursued ...
Grizelda du Toit +4 more
semanticscholar +1 more source