Results 31 to 40 of about 173,992 (333)

Critical flux-based membrane fouling control of forward osmosis: Behavior, sustainability, and reversibility [PDF]

open access: yes, 2018
Membrane fouling is closely related to the concept of critical flux. Therefore, a fouling control strategy for forward osmosis (FO) membranes that is based on the critical flux is necessary.
Field, Robert   +4 more
core   +2 more sources

Investigation of the type and content of gypsum on the dimensional stability and mechanical properties of gypsum particleboard [PDF]

open access: yesIranian Journal of Wood and Paper Industries, 2014
In this study in order to investigate the effect of gypsum type on the physical and mechanical properties of gypsum Particleboard were used from two type Jebel and Micronize gypsum.
Hossein Rangavar   +2 more
doaj  

Preparation of superfine and semi-hydrated flue gas desulfurization gypsum powder by a superheated steam powdered jet mill and its application to produce cement pastes

open access: yesCase Studies in Construction Materials, 2022
The low reactivity, high moisture content, and gap-graded particle size distribution of flue gas desulfurization (FGD) gypsum clearly restrict its large-scale application, particularly for cement production.
Zhonghui Xu   +8 more
doaj   +1 more source

Hydration Modeling of Calcium Sulphates [PDF]

open access: yes, 2008
The CEMHYD3D model has been extended at the University of Twente in the last ten years [1,2]. At present the cement hydration model is extended for the use of gypsum.
Brouwers, H.J.H., Korte, A.C.J. de
core   +1 more source

Physical Origin of Temperature Induced Activation Energy Switching in Electrically Conductive Cement

open access: yesAdvanced Science, EarlyView.
The temperature‐induced Arrhenius activation energy switching phenomenon of electrical conduction in electrically conductive cement originates from structural degradation within the biphasic ionic‐electronic conduction architecture and shows percolation‐governed characteristics: pore network opening dominates the low‐percolation regime with downward ...
Jiacheng Zhang   +7 more
wiley   +1 more source

Analysis of drying and saturating natural gypsum samples for mechanical testing

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2019
The stability of underground abandoned gypsum mines is dependent on the gypsum pillar's strength, and most abandoned mines are in a fully saturated condition.
Mohammadhossein Sadeghiamirshahidi   +1 more
doaj   +1 more source

Gypsum hydration: a theoretical and experimental study [PDF]

open access: yes, 2009
Calcium sulphate dihydrate (CaSO4·2H2O or gypsum) is used widely as building\ud material because of its excellent fire resistance, aesthetics, and low price. Hemihydrate occurs in two formations of α- and β-type.
Brouwers, H.J.H.   +2 more
core   +1 more source

Investigation of the Incompatibilities of Cement and Superplasticizers and Their Influence on the Rheological Behavior [PDF]

open access: yes, 2020
The rheological behavior of cement paste and the improvement of its flowability takes center stage in many research projects. An improved flowability can be achieved by the addition of superplasticizers (SP), such as polycarboxylate ethers (PCE).
Jakob, Cordula   +4 more
core   +2 more sources

Hydration Behavior of Tricalcium Silicate in Seawater Relevant Salt Systems: A Hybrid Study with the Aid of Machine Learning

open access: yesAdvanced Intelligent Discovery, EarlyView.
The hydration behavior of C3S in seawater‐relevant solutions is studied based on experiments, boundary nucleation and growth (BNG) modeling, and machine learning. The main ions included in seawater modify hydration mechanisms, with MgCl2 showing the strongest acceleration effect at the same concentration.
Yanjie Sun   +6 more
wiley   +1 more source

Experiments on seismic behaviour of steel sheathed cold-formed steel shear walls cladded by gypsum and fiber cement boards [PDF]

open access: yes, 2016
Acknowledgments The authors are grateful to the Building and Housing Research Center (BHRC) of Iran for providing testing equipment and technical support and Paya Sazeh Pasargad CO, Knauf Iran CO and SHERA CO for providing testing specimens and materials.
Bagheri Sabbagh, Alireza   +4 more
core   +1 more source

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