effect of chemical gypsum on cement quality in Oman

Effect of using sugar and gypsum as a retarder on concrete …

Sugar has a strong retarding effect, and this effect, controlled by Gypsum, can shorten the long setting time caused by sugar. The setting time of cement paste was …

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Effect of Using Sugar and Gypsum as a Retarder on Concrete …

This study deals with the retardation of cement setting time and workability in hot weather such as in Sultanate of Oman. Combination of sugar and gypsum...

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Construction Materials | Free Full-Text | Effects of Gypsum …

Usage of industrial by-products such as ground granulated blast furnace slag (GGBFS), gypsum, and limestone powder have gained prominence in concrete production. It is, therefore, very important to conduct research into the various materials and their attendant influence on properties of concrete at different ambient temperatures. …

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Effect of Using Sugar and Gypsum as a Retarder on …

chemical composition of cement (Ahmad et al., 2020). The ... Cement: The cement used was ordinary Portland cement manufactured by Oman cements Ltd Sand and Gravel: They were collected from quarries ... Figure 3: Effect of gypsum combination of sugar with gypsum are shown in Tables 2, 3, on setting time for 0.02% sugar ...

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(PDF) Effect of Nano-gypsum on Mechanical Properties Cement …

This study investigates the effect on the mechanical properties of cement-stabilised silty soft soil (CSS) using nano-gypsum (NG). Unconfined compression strength (UCS) test trials were conducted ...

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Partial Cement Replacement in Concrete with Gypsum …

2.1 Test Matrix. Five total mix designs are considered for this study including one control batch, two batches that involve fine gypsum as a partial replacement for cement in different amounts (20% and 10%), and two batches that involve the whole gypsum as partial replacements for 10% and 20% of cement in the concrete.

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Effect of gypsum content in cement on its adaptability to …

The results showed that an increase in the gypsum content of the cement promoted the formation of ettringite (AFt) and decreased the setting times of the cement …

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The effect of water and gypsum content on strätlingite …

In view of this data, the new eco-cement could be catalogued as an eco-friendly binder very similar to other types of cements found in the literature, such as belite cement and calcium ...

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Optimization of mechanical performance of limestone …

Halloysite is a clay mineral that has a nanosized tubular morphology and high pozzolanic activity, and its calcination product can be used as a supplementary cementitious material in limestone calcined clay cement (LC 3).In this study, the effects of the calcination temperature of halloysite, gypsum content, and water/binder (W/B) ratio …

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Effect of Portland Cement on the Selected Properties of Flue …

The introduction of the European Union's climate change legislation and the intended use of renewable energy sources instead of fossil fuels will significantly reduce the production of flue gas desulfurization (FGD) gypsum used as the raw material for gypsum mortar plasters' production. This has forced mortar producers to look for alternative …

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(PDF) Effect of gypsum and cement content on unconfined …

Considering Portland cement to be $90/ton and gypsum to be $30/ton (Kimball and Jewell 2016), a one cubic meter of mixture with the density of 1.4 (gr/cm3) with 8% Portland cement (112 kg, or of the total binder content) would cost $10.08, while a mixture of 2% gypsum (28 kg, or 25% of the total binder content) and 6% Portland cement (84 ...

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New insights into the effect of gypsum on hydration and …

For a full understanding of the controlling mechanism of gypsum on cement setting, it is necessary to clarify the effect of gypsum on the elasticity development of …

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Application of the Industrial Byproduct Gypsum in …

In the building materials, the industrial byproduct gypsum is mainly used in the production of cement retarders, gypsum slats, gypsum bricks, gypsum blocks, etc. In recent years, new gypsum products, such as self-leveling gypsum, α-type high-strength gypsum, ii-type anhydrous gypsum, and calcium sulfate whiskers, have also been …

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About | Raw / Natural Gypsum Mining Company Oman

GMC is the first Company in the Sultanate of Oman, which supplies raw gypsum with high purity (above 90 %) to the Cement Companies throughout the Gulf Area, India, Japan, Vietnam, Indonesia & African countries. GMC is the sole dealer to Raysut Cement Company in the Sultanate of Oman since 1999 with the annual contract

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Cement & Concrete FAQ

Cement is a key ingredient of concrete, typically making up 10 to 15 percent of the concrete mix by volume. Portland cement and portland-limestone cement are the most common types of cement used in concrete. In concrete, a paste made of cement and water is mixed with aggregates (sand, gravel, or crushed stone).

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Positive and negative impacts of flue gas desulfurization (FGD) gypsum …

1. Introduction. Flue gas desulfurization (FGD) gypsum is a synthetic form of gypsum created as a by-product of carbon-based energy sources (typically coal combustion) (Chen and Dick, 2011; Chen et al., 2014).Limestone forced oxidation scrubbers remove sulfur dioxide from the flue gas stream of sulfur-heavy energy …

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Optimization of the SO3 content of an Algerian Portland cement…

Portland cement CEM I is obtained from (95–97%) of clinker and (3–5%) of gypsum, according to EN 197-1 (2011) standard. Sulfur xide SO3 is the main component of gypsum (Calcium Sulfate ...

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FEATURE Gypsum The role of gypsum in cement

One of the main quality issues faced by cement plants using the chemical gypsum was the presence of contamination with azo dyes in the gypsum which resulted in market …

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Gypsum : The Mineral of utmost necessity in Cement …

moisture contents up to 25 to 30 %, the cement plants have to handle the wet chemical gypsum appropriately . One of the main quality issues faced by plants using the chemical gypsum Cement was the presence of contamination with Azo Dyes in the chemical Gypsum which resulted in market

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Effect of Using Sugar and Gypsum as a Retarder on …

Gypsum renders workability to mortar or concrete by keeping the cement in plastic state at early age of hydration. This is achieved by changing the course of hydration of …

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Uses of Gypsum in Cement

Gypsum in cement reduces friction between its particles, thus resulting in a mix with higher smoothness and improved workability. Durability. Gypsum increases the durability of cement structures or elements by providing improved resistance to chemical attacks by sulfates and alkali-silicates. Effects of Gypsum in the cement

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Effects and Control of Chemical Composition of Clinker for Cement

The objectives of this research were to obtain the chemical composition of cement clinker sample data after the x-ray diffraction (XRD) analysis from the quality control department of the two ...

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Why gypsum is added to cement? Roles and Uses of Gypsum …

Why gypsum is added to cement? Role of gypsum in cement. Cement is a binding material used in the construction of concrete structures. Cement plays a vital role in terms of economy and the durability of the structure. So, cement should maintain quality enough while mixing the ingredient of concrete i.e sand, aggregate, and admixture.

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Partial Cement Replacement in Concrete with Gypsum …

2.1 Test Matrix. Five total mix designs are considered for this study including one control batch, two batches that involve fine gypsum as a partial replacement for cement in different amounts (20 and 10%), and two batches that involve the whole gypsum as partial replacements for 10 and 20% of cement in the concrete.

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Utilisation of Synthetic Gypsum from FGDs

During the year 2015-16, apart from mineral, marine and by-product gypsum sourced from India, about 4.6 MT of mineral gypsum was imported from Oman, UAE, Pakistan and Thailand. The purity of imported gypsum is about 85 per cent whereas mineral gypsum from Rajasthan have a quality of 60-75 per cent. The purity of …

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Product Information – Oman Cement Company

Gypsum, which is used for retarding the setting of cement is obtained from the mines at Ghaba in Wilayat Adam. ... Oman Cement has a range of top quality products to meet your requirements. We have given a list of our products below with detailed description and specification data. In case you need additional information on these products or if ...

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Resistance to Grinding and Cement Paste Performance of …

In Portland cement, oxides' composition defines final product quality and performance. Variations in chemical composition of the oxides are evidenced throughout the cement manufacture process at its different stages, such as mining of raw materials at different quarries, differences in the kiln burning conditions, or the addition of aggregates …

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FEATURE Gypsum The role of gypsum in cement

Some other chemical gypsum are white/dirty white as wet cake but on drying in gantry/storage, the gypsum tends to become dark brown to reddish in colour which reduces its usage levels as it would affect colour of cements. Having appropriate performance tests on the receipt chemical gypsum would help the cement plants to overcome the …

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Oman Gypsum Powder Ideal choice for remodeling and repair works, and for the creation of beautiful cornices and decorations Learn More Oman Gypsum Plaster Plaster is excellent for the creation of refined textured or smooth surfaces that come with crack and chip resistant finishes Learn More Oman Agriculture Gypsum Improves soil …

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Effect of Mineral Admixtures on Physical, Mechanical, and

The production of flue gas desulfurization gypsum poses a serious threat to the environment. Thus, utilizing gypsum-based self-leveling mortar (GSLM) stands out as a promising and effective approach to address the issue. β-hemihydrate gypsum, cement, polycarboxylate superplasticizer, hydroxypropyl methyl cellulose ether (HPMC), retarder, …

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