Results 11 to 20 of about 61,326 (193)

Depositional models of lacustrine evaporites in the SE margin of the Ebro basin (Paleogene, NE Spain) [PDF]

open access: yes, 2007
An important evaporitic sedimentation occurred during the Paleogene (Eocene to lower Oligocene) in the Barberà sector of the southeastern margin of the Tertiary Ebro Basin.
Ortí Cabo, Federico   +3 more
core   +8 more sources

Gypsum karst geohazards in China [PDF]

open access: yes, 1997
China has the worlds largest proven gypsum (CaSO4.2H2O) resources in the world. The gypsum ranges from pre-Cambrian to Quaternary in age and occurs in varied geological environments.
Cooper, A.H., Yaoru, Lu
core   +3 more sources

Synthesis of Fluorite (CaF2) Crystal from Gypsum Waste of Phosphoric Acid Factory in Silica Gel [PDF]

open access: yes, 2012
This paper report the synthesis and characterization of fluorite single crystal prepared from gypsum waste of phosphoric acid production in silica gel. Instead of its high calcium, gypsum was used to recycle the waste which was massively produces in the ...
Mutrofin, Siti   +3 more
core   +2 more sources

Stability of dams constructed on problematic substrates [PDF]

open access: yes, 2013
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Dissolution of soluble substrates such as gypsum presents a major hazard to dams in many parts of the world. This research simulates hypothesised conditions
Salih, Nihad Bahaaldeen
core   +7 more sources

Avoiding gypsum geohazards : guidance for planning and construction [PDF]

open access: yes, 1998
This information details the occurrence and characteristics of the rock and mineral gypsum, its highly soluble nature and the types of problems associated with it.
Cooper, A.H., Calow, R.C.
core   +3 more sources

SYSTEM FOR SUPPLYING HIGH SHEAR STARCH TO A GYPSUM BOARD MACHINE AND METHODS OF MANUFACTURING GYPSUM BOARD USING HIGH SHEAR STARCH [PDF]

open access: yes, 2018
The present disclosure provides systems for supplying high shear starch to a gypsum board machine and methods of manufacturing gypsum board using high shear starch.
National Gypsum Company
core   +1 more source

An Examination of Subsidence in North-East England due to the Dissolution of Sub-Surface Gypsum using the Shallow Seismic Reflection Technique [PDF]

open access: yes, 2009
Along a narrow swath from Nottingham through to Hartlepool, broad shallow depressions up to 100m in diameter and, more rarely, scarp-edged subsidence hollows are observed.
Sargent, Colin
core  

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

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

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

open access: yesThe Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro   +1 more
wiley   +1 more source

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