Results 31 to 40 of about 156,182 (239)

The Effects of Different Water Types on the Dissolution, Physical Appearance, and Compressive Strength of Gypsum Rock

Journal of Engineering, 2023
Dissolution of gypsum rock in water is significant, which may result in hydrocarbon reservoir formation and evaporate deposits. However, the complexity of the gypsum dissolution process is still of interest because of its uncleanness that requires more ...
Tavga Aram Abdalla Salih, Nihad Bahaalden Salih, Farouk Abdullah Rasheed   +2 more
doaj   +1 more source

Acid leaching technology for post-consumer gypsum purification [version 3; peer review: 2 approved, 1 approved with reservations]

Open Research Europe
Background Contaminants and water-soluble salts present in mechanically recycled gypsum from refurbishment and demolition (post-consumer) plasterboard waste limit its use as a secondary raw material in plasterboard manufacturing.
Mohamed Osmani, Miguel Castro-Diaz, Paul Needham, Sergio Cavalaro, Tatiana Lovato, Bill Parker   +5 more
doaj   +1 more source

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

Iranian 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, M.Hassan Payan, Saeid Khojaste   +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

Case 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, Dan Hu, Ran An, Longyuan Lin, Yingling Xiang, Linpei Han, Yunlin Yu, Liping Ning, Jing Wu   +8 more
doaj   +1 more source

Hydration Modeling of Calcium Sulphates [PDF]

, 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

Advanced 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, Xinyuan Ke, Andrew Heath, Richard J. Ball, Jiawei Xie, Jinchen Fan, Guisheng Li, Kevin Paine   +7 more
wiley   +1 more source

Hydration modelling of Calcium Sulphates [PDF]

, 2008
The CEMHYD3D model has been extended at the University of Twente in last ten years1,2. At present the cement hydration model is extended for the use of gypsum. Although gypsum was present in the model already, the model was not suitable for high contents
Korte, Ariën de
core   +1 more source

Scalable Electrochemical Concrete Fabrication and Closed‐Loop Recycling

Advanced Science, EarlyView.
The electrochemical‐driven recycling strategy establishes a reversible concrete material flow by extracting Ca, Si, Al, and Fe from concrete waste and regenerating functional feedstocks. These reversed products are reassembled into new concrete, which re‐enters service and ultimately returns to waste, enabling a closed‐loop, waste‐origin, and low ...
Hanxiong Lyu, Zhenlin Li, Yang Liu, Lu Zhu, Lucen Hao, Mingxin Shi, Shipeng Zhang, Chi Sun Poon   +7 more
wiley   +1 more source

Analysis of drying and saturating natural gypsum samples for mechanical testing

Journal 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, Stanley J. Vitton   +1 more
doaj   +1 more source

Jarosite versus Soluble Iron-Sulfate Formation and Their Role in Acid Mine Drainage Formation at the Pan de Azúcar Mine Tailings (Zn-Pb-Ag), NW Argentina [PDF]

, 2014
Secondary jarosite and water-soluble iron-sulfate minerals control the composition of acid mine waters formed by the oxidation of sulfide in tailings impoundments at the (Zn-Pb-Ag) Pan de Azúcar mine located in the Pozuelos Lagoon Basin (semi-arid ...
Alicia Kirschbaum, Bernhard Dold, Edi Mendes Guimaraes, Elisa Pannunzio Miner, Jesica Murray, Nw Argentina   +5 more
core   +3 more sources