The study presented herein aims to predict the UCS and tangent Young' s modulus ( Et) of the gypsum based on its water content, porosity, sonic velocity, Schmidt hammer rebound number, and point load index. This is accomplished by using multiple regression (MR), ANN, adaptive neuro-fuzzy inference system (ANFIS) models.

Gypsum, common sulfate mineral of great commercial importance, composed of hydrated calcium sulfate. It occurs in extensive beds associated with other evaporite minerals, particularly in Permian …

This paper reports gamma-ray spectra, recorded with a high-purity coaxial germanium detector, on standard cement blocks with increasing uranium content, and the corresponding MCNP simulations.

Gypsum Supergroup. Name: First known mention is by Theophrastus about 300-325 BCE from the Greek γυψοζ (gypsos) meaning plaster. Isostructural with: Ardealite, Brushite, Pharmacolite. The most common sulphate mineral. Found as both massive material, including the alabaster variety; and clear crystals, the selenite variety; and, parallel ...

American Gypsum products utilize face and back paper made of recycled/post consumer materials. We practice mine stewardship with mining and reclamation plans, and comprise 95% of our gypsum board using synthetic gysum which is certified as low volatile organic compound (VOC) products by the GREENGUARD Environmental Institute.

A new company has shipped a load of gypsum from the mine for the first time in 28 years.

Direct mineral carbonation (MC) is used to mitigate carbon dioxide (CO2) emissions. This method has the great advantages of reducing the amount of industrial residues and creating valuable materials by incorporating CO2. Waste gypsum, industrial waste including flue gas desulfurization (FGD) gypsum (25.27–53.40 wt% of CaO), and …

Gypsum, a common mineral, has many practical, modern day applications. It is used in dry wall, concrete and common items like blackboard chalk. The extraction process, however, can lead to innumerable problems, particularly for those involved in the mining process and those who live in the vicinity of the mine.

J&K Minerals Limited is actively mining Gypsum from Assar Gypsum mine which is situated at 30 K.M. from Batote on N.H.-18 and is envisaging to expoit huge gypsum reserves from Parlanka area in Distt.

Gypsum Mines. In 1898 William T. Powers began constructing a gypsum mine one hundred feet below the bed of the Grand River. The mine shaft was located at the most westerly span of the Blue Bridge, formerly the Grand Rapids & Indiana Railroad Bridge. Powers owned land on the west bank, extending from where the bridge crossed the river …

In order to study the characteristics of overburden failure, stress and displacement in the process of filling mining, the key technical parameters of overburden movement are determined.

Gypsum from Elwood Swamp, Victoria (Scale: 6.5 cm) Pure gypsum is hydrous calcium sulphate (CaSO 4 .2H 2 O). It is a soft mineral, white when pure, but of varying shades of grey, yellow, red or brown if impure. The main use for Victorian gypsum is for agricultural soil conditioning, although demand for this fluctuates in response to the …

This study introduced a heat-induced accelerator (HIA) to control gypsum setting on-demand to promote the printability of the extrusion-based 3D gypsum. The gypsum was first retarded to acquire pumpability and extrudability, then setting time of retarded gypsum with HIA at different temperature was examined.

The Lake Macleod Gypsum project is operated by Dampier Salt Limited, a company majority owned by Rio Tinto (68.4 percent), Marubeni Corporation (21.5 percent) and Sojitz (10.1 percent). The project is part of the Lake MacLeod salt mine which is located 860 kilometres north west of Perth, in Western Australia.

In the current study, the gamma-radiation-shielding characteristics of novel gypsum–lime–waste marble-based mortars reinforced with micro-PbO and nano-PbO powders were investigated. In total, seven mortar groups, including a control mortar ...

Abstract. Land application of gypsum has been studied and utilized in agriculture and environmental remediation for many years. Most of the published literature has focused on gypsum application impacts on soil properties rather than crop yields. This literature review was conducted to (i) gather results from gypsum application studies …

Fort Dodge gypsum constitutes about 12-13% of the total U.S. production. Because of the limited extent of the gypsum resource at Fort Dodge, Owen's "inexhaustible" supply will be depleted within about 30 years at its current mining rate.

The use of recycled gypsum not only preserves natural resources by reducing the need for additional gypsum mining. It also keeps waste drywall out of landfills and provides many ways to safeguard our environment, sustain our crops, and revitalize contaminated sites to provide additional resources for the future.

In 2015, AI Jood Natural Resources L.L.C entered into a joint venture with a local mining company at Salalah who is mining Natural Gypsum. The total reserve estimated is approximately 13 million tons.

Drone-based geophysical methods can be used to assess post-mining areas to facilitate remediation planning, and to monitor them as part of long-term institutional control in the post-closure phase. A case study of drone-based gamma spectrometric investigations is presented, using the example of legacies of former uranium mining.

The concentrations of natural radionuclides, namely 226 Ra, 232 Th and 40 K in different chemical fertilizers used in agricultural soil were analyzed using gamma spectrometry with a high purity germanium (HPGe) detector in order to assess the implications of the extended use of phosphate fertilizers in recent years.

Gamma-gamma density tools detect gamma radiation using a scintillation detector, which is a crystal composed of sodium- or cesium iodide. The scintillation crystal is shielded such that it only measures gamma photons that have undergone Compton scattering and disregards those directly from the source.

At a recent coffee meeting with a grad student friend of mine, I learned that gypsum mining has a rich history in southern Ontario. Specifically, in the lower Grand River watershed, gypsum has been mined for about 200 years! Gypsum is a soft mineral that is used primarily in the construction industry for plaster or wallboard and as a …

A graph pattern mining framework for large graphs on gpu. This is the source code of "GAMMA: A Graph Pattern Mining Framework for Large Graphs on GPU" (ICDE 2023), by Lin Hu, Prof. Lei Zou, Prof. Tamer Ozsu.

First known as Canadian Gypsum Co., CGC began mining at Little Narrows in 1907, and most recently it operated the mine from 1954 to 2016. Revitalizing the existing quarry site is expected to take up to three years. The project will include a new dock and shiploader, new crusher and conveyor systems, and new open pit mining equipment. …

The construction of wallboard manufacturing plants designed to use synthetic gypsum from coal flue gas desulfurization (FGD) units as feedstock has resulted in less mining of natural gypsum.

Gamma-ray shielding parameters of locally used building materials (clay, sand, kaolin, and gypsum) in the Northwestern Nigeria were determined experimentally using 60 Co and 137 Cs gamma radiation ...

Gypsum mining spoil (GS) is a waste material highly produced in gypsum mining industry, which has never been used in soil remediation despite its high potential as amendment of polluted soils.

The US leads the world in production, annually mining 21 million tonnes of gypsum from 50 mines in 17 states. Gypsum ore, an impure form of gypsum called gypsite or gypsum rock, is obtained from …

The First Gypsum Mine in Paris Ontario (1822) One of our partners in the Brant Museum and Galleries Association, Paris Museum and Historical Society, is celebrating the 50th year since it was founded. Paris has a wonderful museum and archives situated in the old Apps Arena. We congratulate them on their great success with many talented volunteers!