Mineralogical evolution of cement pastes at early ages based on thermogravimetric analysis (TG)
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Thermal Analysis and Calorimetry"
DOI: 10.1007/s10973-017-6905-0
Abstract: Ordinary thermogravimetric analysis (TG) and high-resolution TG tests were carried out on three different Portland cement pastes to study the phases present during the first day of hydration. Tests were run at 1, 6, 12… read more here.
Keywords: thermogravimetric analysis; analysis; cement pastes; mineralogical evolution ... See more keywords
Comparison between methods for determining the yield stress of cement pastes
Sign Up to like & getrecommendations! Published in 2019 at "Journal of The Brazilian Society of Mechanical Sciences and Engineering"
DOI: 10.1007/s40430-019-2111-2
Abstract: The determination of the yield stress (τ0) of cement-based materials is of great interest for engineering applications, since it accurately describes the flow behavior and assesses empirical properties related to its workability, such as the… read more here.
Keywords: stress cement; cement; cement pastes; yield stress ... See more keywords
Insights and issues on the correlation between diffusion and microstructure of saturated cement pastes
Sign Up to like & getrecommendations! Published in 2019 at "Cement and Concrete Composites"
DOI: 10.1016/j.cemconcomp.2018.11.018
Abstract: Abstract The objective of this study is to quantify the contributions of microstructure and molecular size of diffusing species to tortuosity, constrictivity and effective diffusivity. The microstructural effect is simulated with different sound, leached or… read more here.
Keywords: molecular size; diffusion; cement; diffusing species ... See more keywords
Effect of graphene oxide on the deterioration of cement pastes exposed to citric and sulfuric acids
Sign Up to like & getrecommendations! Published in 2021 at "Cement and Concrete Composites"
DOI: 10.1016/j.cemconcomp.2021.104252
Abstract: Abstract Acid-induced deterioration reduces the service life of concrete and requires high maintenance costs. This study examined the deterioration of graphene oxide (GO)-modified cement pastes exposed to 1 M citric acid (C6H8O7) and 1 M sulfuric acid… read more here.
Keywords: graphene oxide; deterioration; cement pastes; pastes exposed ... See more keywords
Rheology of fresh cement pastes modified with nanoclay-coated cements
Sign Up to like & getrecommendations! Published in 2021 at "Cement and Concrete Composites"
DOI: 10.1016/j.cemconcomp.2021.104301
Abstract: Abstract Nanoclays (NC) can serve as thixotropy modifiers for fresh concretes, and show potential to meet the rheological demands of 3D concrete printing. Here, we propose a dry dispersion technique that produces NC-coated cement and… read more here.
Keywords: cement pastes; rheology; rheology fresh; fresh cement ... See more keywords
The heterogeneous nature of bleeding in cement pastes
Sign Up to like & getrecommendations! Published in 2017 at "Cement and Concrete Research"
DOI: 10.1016/j.cemconres.2017.02.012
Abstract: Abstract We focus in this paper on the bleeding of cement pastes. Our experimental results suggest that bleeding cannot be simply considered as the consolidation of a soft porous material but is of an obvious… read more here.
Keywords: bleeding cement; cement pastes; nature bleeding; cement ... See more keywords
Early-state water migration characteristics of superabsorbent polymers in cement pastes
Sign Up to like & getrecommendations! Published in 2019 at "Cement and Concrete Research"
DOI: 10.1016/j.cemconres.2019.02.010
Abstract: Abstract Water exchange and migration of superabsorbent polymers (SAP) in cement paste is a very complicated process and governs the effectiveness of internal curing in concrete. The early state of SAP in real pore fluids… read more here.
Keywords: superabsorbent polymers; water; early state; migration ... See more keywords
Quantifying glass powder reaction in blended-cement pastes with the Rietveld-PONKCS method
Sign Up to like & getrecommendations! Published in 2020 at "Cement and Concrete Research"
DOI: 10.1016/j.cemconres.2020.105999
Abstract: Abstract X-ray diffraction (XRD) is a prominent technique to characterise cement-based materials. The combination of the Rietveld refinement with the Partial Or No Known Crystal Structure (PONKCS) approach now enables the quantification of both crystalline… read more here.
Keywords: cement pastes; method; rietveld ponkcs; cement ... See more keywords
Rheology of fresh cement pastes containing polymer nanoparticles
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DOI: 10.1016/j.cemconres.2021.106419
Abstract: Abstract Influences of polymer nanoparticles (PNPs) with varied charge densities on the rheological behaviors of fresh cement pastes (fcps) without and with polycarboxylate superplasticizer (PCE) were studied. In the blank fcp, the addition of PCE… read more here.
Keywords: fresh cement; pce; polymer nanoparticles; cement ... See more keywords
Soluble phosphate salts as setting aids for premixed calcium phosphate bone cement pastes
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DOI: 10.1016/j.ceramint.2021.05.110
Abstract: Abstract Recently, premixed calcium phosphate cement pastes have been proposed as biomaterials for bone tissue repair and regeneration. Use of premixed pastes saves the time and removes an extra step during a medical operation. α-Tricalcium… read more here.
Keywords: phosphate; cement; premixed calcium; calcium phosphate ... See more keywords
Kinetic study on elemental mercury release from fly ashes and hydrated fly ash cement pastes.
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DOI: 10.1016/j.chemosphere.2019.125028
Abstract: The kinetics of elemental mercury (Hg0) release from fly ashes and hydrated fly ash cement pastes was investigated using a homemade Hg measurement system. Three types of fly ash (FA) and ordinary Portland cement (OPC)… read more here.
Keywords: cement pastes; ash cement; cement; hydrated fly ... See more keywords