Results 121 to 130 of about 217,054 (345)

Identification of the parameters affecting the in situ dissolution process of natural gypsum [PDF]

, 2022
Imen Zaier, Joël Billiotte, Laurent de Windt, Arnaud Charmoille   +3 more
openalex   +1 more source

Dehydration Pathways of Gypsum and the Rehydration Mechanism of Soluble Anhydrite γ-CaSO4

ACS Omega, 2019
The dehydration products of gypsum under different temperature and water vapor pressure were investigated by thermodynamic theory. Additionally, the rehydration mechanism of soluble anhydrite was also studied by Monte Carlo (MC) simulations.

semanticscholar   +1 more source

Hyperspectral imaging applied to end-of-life (EOL) concrete recycling [PDF]

, 2015
The recovery of materials from DW is an important target of the recycling industry and it is important to know which materials are presents in order to set up efficient sorting and/or quality control actions.
Bonifazi, Giuseppe, Palmieri, Roberta, Serranti, Silvia   +2 more
core   +1 more source

Experimental and Theoretical Investigation on the Progressive Breaking Law of Thick and Hard Rock Strata in Deep Mining

Energy Science &Engineering, EarlyView.
This work reveals the “C‐Y,” double “Y,” “π,” and “Y” fracture modes of thick, hard strata and their progressive breaking process (O‐F‐R/S mode), providing a theoretical basis for controlling strong ground pressure in deep mining. ABSTRACT In response to the dynamic hazards caused by the fracture of thick‐hard strata in deep mining, this study ...
Meilu Yu, Jianping Zuo
wiley   +1 more source

A Novel Approach of Semi‐Quantifying Gypsum in Sedimentary Rocks by Visible and Near‐Infrared Diffuse Reflectance Spectroscopy

Geochemistry, Geophysics, Geosystems
Gypsum is one of the major evaporite minerals that can be used as a sensitive archive for past climate change, revealing variations in the hydrological cycle and dry‐wet climatic alternations. Measuring variations in gypsum content, rapidly and with high
Jingyu Zhang, Wei Cao, Yang Lu, Fernando Gázquez, Wout Krijgsman, Xiandi Zeng, Yi Zhong, Wei Liu, Qingsong Liu   +8 more
doaj   +1 more source

Study and Discussion on Preparation of Hemihydrate Gypsum by Salt Solution Method

Kuangchan zonghe liyong
This is an article in the field of mineral materials. The utilization of desulfurized gypsum (FGD) to prepare more widely used hemihydrate gypsum plays a very important role in the resource utilization of industrial by-product gypsum.
Jiyan QU, Gaoxiang CHEN, Ruicun LIU, Yong ZHOU, Jianhong LUO   +4 more
doaj   +1 more source

Impact of gypsum type on the setting and hardening performance and mechanism of water-rich filling materials

工程科学学报, 2015
As for the problem that different gypsum types have different influence on the condensation performance of water-rich filling materials,micro experiments,such as X-ray diffraction,scanning electron microscopy and infrared spectroscopy,were used to ...
LIU Juan-hong, MA Yi, WANG Zu-qi, GAO Meng, ZHOU Qian   +4 more
doaj   +1 more source

Deriving the Charring Rate of a Wood Fibre Insulation Board by Exposure to the ISO 834 Standard Fire

Fire and Materials, EarlyView.
ABSTRACT Wood fibre insulation boards (WFIB) are widely used combustible building materials, commonly applied in energy‐efficient construction for their thermal and hygric performance. The present study investigates the behaviour of the most common type of wood fibre insulation when exposed to the ISO 834 standard fire.
Joel Philippe Karolin, Mohammad Rahiminejad, Karim Ghazi Wakili, Luis Miguel Olaechea, Christoph Renfer   +4 more
wiley   +1 more source

Softening Damage Analysis of Gypsum Rock With Water Immersion Time Based on Laboratory Experiment

IEEE Access, 2019
In view of the effect of water on the physical and mechanical parameters of natural gypsum rock, in this study, gypsum rock in the goaf of a gypsum mine was selected as the research object, and gypsum rock samples were prepared with different immersion ...
Chun Zhu, Xiaoding Xu, Wan-rong Liu, Feng Xiong, Yun Lin, Chen Cao, Xue Liu   +6 more
semanticscholar   +1 more source

An Experimental Investigation on the Impact of Burner Height and Location on the Characteristics of Externally Venting Flames

Fire and Materials, EarlyView.
ABSTRACT Fire sources in actual compartment fires exhibit a predominantly uneven spatial distribution. In this context, the impact of the height and location of the fire source, as well as the heat release rate (HRR) of the fire, on the thermal characteristics of Externally Venting Flames (EVF) is experimentally investigated.
Dionysios I. Kolaitis, Andrianos E. Koklas   +1 more
wiley   +1 more source