gypsum as an additive to cement

Gypsum: An additive for stabilization of swelling clay soils

The literature contains a vast number of stabilizing techniques such as lime, cement, and fly-ash for treatment of expansive clay soils. However the use of gypsum as a stabilizing agent is currently not clear. ... However the results of this study showed that the gypsum is a good additive for improvement of the swelling clays, contamination of ...

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.

Gypsum as a Construction Material-A Review of …

To obtain these desirable properties the application of several numbers of chemical admixtures and mineral additives in gypsum were found necessary. ... Characteristics of acrylic latex-modified and partially …

Strength of lime–fly ash compacts using different curing techniques …

6.4 Influence of gypsum additive on the strength of compacted lime–fly ash mixtures. Influence of additives like gypsum on the strength and strength gain rate of compacted lime–fly ash mixtures was examined. Gypsum content was varied between 0.5 and 10% for a range of lime contents (3.5%, 10.5%, 17.5% and 26.25%).

How does Gypsum Concrete work?

I think portland cement is the primary "binder" agent in the concrete mixture, and gypsum acts as an additive and serving an important function when need. Role of gypsum in cement: "Gypsum is a mineral and …

Improving Weak Subgrade Soil Using Different Additives

Therefore, in this study, different additives (lime, cement kiln dust (CKD), fiberglass, Addicrete 11, and gypsum) with different ratios are added to swelling, clayey soil enhanced with sand. Both Daipuria and Trivedi [ 3 ] and Ramteke et al. [ 4 ] found that adding 20% to 40% sand mixed with 2% cement increased the soil resistance strength.

Soil stabilization with gypsum: A review

Popp et al. (2021) revealed that mixing gypsum with additives like lime and cement could reduce the leaching of impurities from gypsum in the soil to safe levels …

Exploring the Properties and Versatile Applications of Gypsum …

It can be used to create strong and durable cement-based mortars, plasters, and other building materials. Gypsum powder also has fire-resistant properties, which makes it ideal for insulation applications. Additionally, gypsum powder can be used as an additive in concrete mixtures to increase strength and reduce cracking. Plasterboard

The benefits of gypsum for sustainable management and …

Its applications extend to cement making, casting molds, wall and floor design, and gypsum plaster (Zoca and Penn 2017). In agriculture, gypsum serves as a …

(PDF) Technical feasibility for use of FGD gypsum as an additive

Flue gas desulfurization (FGD) gypsum was evaluated as a setting time retarder to replace the natural gypsum in the production of Portland cement (CP II E-32).

Gypsum Addition

Effect of sulphate of the hydration kinetics of the composite cement (a) Slag-Limestone combination (S2, S3 and S4 indicates Gypsum content of 2, 3 and 4%) from [ 142] and …

Gypsum: An additive for stabilization of swelling clay soils

This paper deals with the performance of the gypsum as an additive for treatment of the expansive clay soils by means of swell potential and strength. Optimum …

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

OPC paste with a water cement ratio 0.4 to 0.5 was prepared by mixing 500 grams of ordinary Portland cement, a fixed amount of sugar of 0.02% by weight of cement with a combination of different ...

Gypsum: An additive for stabilization of swelling clay soils

Additives such as lime, cement, fly-ash, and gypsum are frequently utilized to enhance the engineering performance of bentonite [4]. However, processing the materials release byproduct like CO2 ...

Technical feasibility for use of FGD gypsum as an additive …

The aim of this research is to study the technical feasibility for the use of FGD gypsum in partial or total substitution of natural gypsum as retarder additive of the …

Gypsum | Dry Mortar | Cement Additives

Gypsum. Gypsum, chemically known as calcium sulphate dihydrate, is one of the most important minerals used in the production of construction materials. Today, the majority of gypsum binder, so-called calcined gypsum, is used for the manufacture of …

Gypsum: An additive for stabilization of swelling clay soils

The literature contains a vast number of stabilizing techniques such as lime, cement, and fly-ash for treatment of expansive clay soils. However the use of gypsum as a stabilizing agent is currently not clear. ... This paper deals with the performance of the gypsum as an additive for treatment of the expansive clay soils by means of swell ...

Cement Additives

Cement additives are materials added to cement for the optimization of the cement properties and the cement grinding process. Cement additives are classified into different product groups such as grinding aids, strength enhancers and performance enhancers. ... Additives for Dry Mortar & Gypsum. Cement Industry. Concrete Repair. Corporate …

Effect of the Addition of Calcined Clay-Limestone-Gypsum …

Therefore, the comparison between the samples with and without additive is carried out in order to analyze the effect of this on the hydration of the cement pastes. the induction period of samples P 40 (Portland Cement, Ra/c 0.40, without additive) and P 45 (Portland Cement, Ra/c 0.45, without additive) which has an approximate duration of …

(PDF) Effective Composites Employing Fast-Hardening Gypsum Cement …

PDF | On Jan 1, 2017, Natalia Vasilyevna Chernysheva and others published Effective Composites Employing Fast-Hardening Gypsum Cement Binders for Additive Manufacturing | Find, read and cite all ...

Thermal treatment and utilization of flue gas desulphurization gypsum

At the same time the gypsum has gained recognition as a product. It is currently used in gypsum binders, plasters and plasterboard manufacture, as well as an additive in the production of Portland cement. In this paper, the feasibility of FGD gypsum in cement and concrete as an admixture was investigated. 2. Experimental2.1. Materials

Physicomechanical Properties of Gypsum with Mineral …

Gypsum, from either nature or industrial by-products, can be a lower-cost and cleaner alternative binder to Portland cement used in construction projects, such as …

Investigation on the effects of desulfurization gypsum on …

Technical feasibility for use of FGD gypsum as an additive setting time retarder for Portland cement. J. Mater. Res. Technol., 7 ... Thermal treatment and utilization of flue gas desulphurization gypsum as an admixture in cement and concrete. Construct. Build. Mater., 22 (2008), pp. 1471-1476, 10.1016/j.conbuildmat.2007.04.001.

Gypsum Applications: Proper Use of Gypsum for Soil

Gypsum is a calcium sulfate dihydrate which has many applications as a plaster and concrete additive, as well as a soil fertilizer and conditioner.

Improving Weak Subgrade Soil Using Different Additives

Secondly, chemical stabilization was applied to enhanced sandy, clayey soil to increase its strength properties. This was performed by adding chemical additives (lime, cement kiln dust (CKD), fiberglass, Addicrete 11, and gypsum) at different ratios of 2%, 4%, and 6% of the total weight of the samples of enhanced sandy, clayey soil.

Alternative Calcium-Sulfate-Bearing Materials as Cement …

In China, a small amount of FGDG is used as cement additives or for gypsum boards, but there still exist a mass of FGDG due to the lack of reusing methods. Also, the waste fly ash (WFA) is another ...

Investigation on the effects of desulfurization gypsum on the

A ternary geopolymer was designed by adding desulfurized gypsum (DG) to FA-GGBS geopolymer. Gels and ettringite-induced filling were responsible for …

Fly ash for sustainable construction: A review of fly ash concrete …

FA, or pulverised fuel ash, is a byproduct of coal-fired power plants and is used as a mineral additive in cement and concrete. Fig. 1 shows a typical layout of a coal-burning generating station. Pulverized coal is blown into the burning zone of the furnace, where its combustible constituents, mainly carbon, hydrogen, and oxygen, ignite at …

Improved geopolymerization of bottom ash by …

It is known that the incorporation of gypsum alters the performances of the Portland cement concrete. Similarly in geopolymer, the addition of gypsum can enhance the degree of geopolymerization [15]. The leaching of alumina can be improved with the presence of sulfate and thus leads to the strength enhancement [16].