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(PDF) Mineralogical and chemical properties of FGD gypsum …

CONCLUSION: This FGD gypsum can easily substitute the natural gypsum used in the production of cement. 2007 Society of Chemical Industry Keywords: petrography; SEM; FGD gypsum; X-ray diffraction INTRODUCTION In 2001 the European Commission introduced the 2001/80/CE Directive regarding atmospheric emission limits for SO2, NOx and dust from coal ...

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Utilization of phosphogypsum in portland cement industry

Utilization of phosphogypsum in portland cement industry. Author links open overlay panel P.K. Mehta, James R. Brady. Show more. Add to Mendeley. Share. ... The physical-chemical properties, mechanical behaviour and environmental impact of these phosphogypsum-based cement mortars were determined. ... 10, and 12.5 wt.% to Portland cements were ...

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Dual role of gypsum: Set retarder and strength accelerator

Gypsum plays a crucial role in cement. Though it is used in a small quantity, in the range of 2.5-3.0 percent in terms of SO3, gypsum's role in cement is significant, more predominantly at early ages.

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An Overview of Eco-Friendly Alternatives as the Replacement of Cement

The study revealed that using only gypsum as a partial cement replacement was disadvantageous to strength, however combining fly ash and gypsum was beneficial at later ages.

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Effect of gypsum on low-heat Portland cement early mechanical

Alkanolamines are commonly used complexing agents in the cement industry. Due to its surface activation effect on cement clinker particles, it is commonly used as cement grinding aids [44], [45].When used as chemical admixtures, it can accelerate the early hydration process of cement by complexing with metal ions [46], [47].Among them, triisopropanolamine (TIPA), …

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Construction and Building Materials

It is often used in building materials, agriculture, chemical industry, medical treatment and other realms. ... Along with cement and lime, gypsum is one of the three main cementitious materials. It is widely used in buildings to create gypsum products. To increase construction efficiency, gypsum can also be utilized as a cement retarder and to ...

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The Power of Gypsum

Gypsum is indispensable to cement as it regulates the setting time of cement and impacts its strength. We look at the various aspects of sourcing and processing of gypsum that makes this retarding agent of cement an …

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Gypsum as set retarder in Cement

Effect of gypsum on cement by preparing four different batches of Ordinary Portland Cement (OPC) using same quality clinker, maintaing SO3 level of cement 2 +/- 0.05 % and maintaining Blaine value ...

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Comparison of Mineral Gypsum vs. Chemical and Anhydrite Gypsum …

Gypsum is a vital component in cement production, primarily used to regulate the setting time of the final product. It comes in several forms—mineral gypsum, chemical (or synthetic) gypsum, and ...

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Gypsum in Cement Production

The raw gypsum extracted from the mine has two main minerals of calcium sulfate, which are called anhydrite and gypsum. Application of Gypsum to Increase the Setting Time of Cement. Although gypsum has many …

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Drying of Chemical Gypsum

Moisture from Chemical Gypsum in the Cement plant.This plant is Located Where Solar Radiation is high (Kalol). II. IMPORTANCE OF GYPSUM IN CEMENT INDUSTRY India is the second largest cement producer in the world and accounts for 6.7 percent of …

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Gypsum | Properties, Formation, Uses and Deposits

Gypsum's chemical composition is relatively simple, consisting primarily of calcium, sulfur, oxygen, and hydrogen atoms. ... Gypsum is added to cement clinker to regulate the setting time and improve the workability of concrete. It is an essential component of Portland cement. ... Oil and Gas Industry: Gypsum is utilized in drilling muds used ...

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Role of Gypsum in Cement and its Effects

For ordinary Portland cement, the gypsum content hovers between 3 to 4%, while quick-setting cement may see a reduction to 2.5%. The primary function of gypsum in cement lies in slowing down the hydration process. Cement, upon …

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Cement Manufacturing Process and Its Environmental Impact

Great care must be taken when using secondary gypsum; secondary gypsum must be mixed well to maintain the chemical properties before blending with clinker and utilizing in the cement mill in the ...

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Determination Of Limestone Quality In Cement Production

Limestone is the key raw materials for the cement making industry where chemical properties are important. Portland cement is produced by the calcination of finely ground raw mixture of limestone and clay (Bouazza et al, 2016). Cement industry is major player for the construction of infrastructures in the development of any country.

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

Gypsum is a mineral and is hydrated calcium sulfate and chemical form. Gypsum is also known as retarding agent in cement because its main function in cement is to control the initial and final setting time of the cement. The chemical formula …

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Gypsum in Cement: Role, Importance, and Why It's …

Gypsum is a small yet vital component of cement, playing a crucial role in its quality, performance, and durability. By controlling setting time, improving workability, and enhancing strength, gypsum ensures that cement …

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The role of gypsum in cement

Chemical gypsum generated primarily by dyes manufacturing industries using sulphuric acid in the manufacture of dye intermediates. The waste/effluent containing sulphuric acid is neutralised with limestone to …

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Partial Cement Replacement in Concrete with Gypsum Powder

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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Partial Cement Replacement in Concrete with Gypsum Powder

Also, the cement industry alone is responsible for 7% of global CO 2 emissions . ... Each material could have different impacts on the natural environment depending on the material's chemical and mechanical properties. Gypsum wallboards (also known as drywalls) account for a significant amount of residential construction waste (nearly 20% ...

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Understanding Gypsum's Crucial Role in Cement and Its Impact …

The amount of gypsum added varies, hovering between 3 to 4% for ordinary Portland cement and potentially reduced to 2.5% for quick-setting cement. Decoding Gypsum's Role in Cement Formation. The primary mission of gypsum in cement is to pump the brakes on the hydration process that kicks into gear when water enters the cement mixture.

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Bibliometric study of the application of gypsum residues and by

In Brazil, gypsum production is estimated at 5.1 million tons, 52 % for civil construction, 37 % for the cement industry, 9 % for the agricultural industry and 2 % for other purposes [14]. ... The chemical composition of gypsum is composed mainly of sulfur trioxide (SO 3) and calcium oxide (CaO), ...

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The purpose of calcium sulfate (gypsum)

This is done by controlling the amount of calcium sulfate (gypsum [CaSO 4 ·2H 2 O] or gypsum with anhydrite [CaSO 4]) added to the cement as it is being ground. Cement chemists believe that for each combination of raw materials and fineness to which the cement is ground, there is some optimum quantity of calcium sulfate that gives the best ...

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A Comprehensive Guide on the Uses of Gypsum in Cement

Cement is extensively used in the construction industry. Gypsum is used as a hardening agent in cement. ... It is mostly made of calcium sulfate dihydrate. The chemical formula is CaSO₄·2H₂O. Gypsum is commonly found in between the layers of sedimentary rocks. It is often used with many other minerals, such as celestine, dolomite, calcite ...

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IS 1290 (1973): Mineral gypsum

for quality of gypsum for fertilizer industry has been specified. For cement industry, gypsum of 70 to 75 percent purity has been prescribed in place of 80 to 85 percent in view of the fast depleting reserves of good quality gypsum in the country. Additional requirement of whiteness has been prescribed for production of white cement.

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Gypsum in Cement Production

Although gypsum has many applications in various fields, it is most widely used in the cement industry. In this industry, gypsum is used to increase the setting time of cement. The gypsum particles that are combined with …

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Synergistic utilization of blast furnace slag with other industrial

Steel slag is similar to cement in their chemical and mineral composition, which has an excellent potential for application in the cement and concrete industry. ... However, the addition amount of gypsum to cement cementitious materials is limited because it may continue to react to form ettringite in the later hydration age, resulting in ...

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Securing gypsum demand in cement industry by gypsum by …

The use of gypsum by-products including PG in cement is conditioned by the reduction of undesirable impurities, such as P 2 O 5, and the reduction of its acidity to enable …

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The Role of Gypsum in Cement and Its Effects

Gypsum enhances the workability and fluidity of cement paste by providing lubrication and reducing friction between particles. This results in improved cohesiveness, making the concrete easier to handle, mix, and place.

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An Insight into the Chemistry of Cement—A Review

Even if cement is a well-consolidated material, the chemistry of cement (and the chemistry inside cement) remains very complex and still non-obvious. What is sure is that the hydration mechanism plays a pivotal role in the development of cements with specific final chemical compositions, mechanical properties, and porosities. This document provides a …

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