The sulfuric acid slurry containing anhydrous gypsum in the lower layer was vacuum-filtered, washed with deionized water, and dried in an oven at 60 °C for 4 h to obtain high-quality PPG.
This inherent fire resistance has made gypsum-based materials a staple in building codes and regulations, highlighting their vital role in creating safer environments …
The Offices 2 Building, One Central Dubai World Trade Center Complex Dubai, UAE ... cementitious materials; durability; ettringite; fly ash; gypsum; manufactured sand; microscopic. DOI: 10.14359/51718051. Date: 11/1/2019. ... Acid resistance was marginally reduced when 50% volume of sand was replaced by FNS. …
These adaptable panels, made of a gypsum core wrapped in a strong paper face, provide a lightweight, long-lasting, and cost-effective option for interior walls and …
The urgent requirement to reduce greenhouse gas emissions during Portland cement production and to enhance the durability of concrete in destructive environments are essential reasons to seek other alternative materials like alkaline activated binders. In this study, the feasibility of producing durable alkali-activated slag …
Please cite this article as: T. Damion, P. Chaunsali, Effect of gypsum addition on acid resistance of Ye'elimite rich calcium sulfoaluminate cement, Cement and Concrete Composites (2023), doi ...
PG is the by-products in the production of phosphoric acid [39], and one ton phosphoric acid emits more than 4.5 ton PG. Waste gypsum is generally pretreated by the elevated temperature and then ...
The utilization of gypsum reinforced composites as building materials has garnered considerable attention owing to their exceptional amalgamation of mechanical strength, fire resistance, and versatile applications. This review initiates by introducing gypsum as a pivotal mineral in construction, subsequently exploring the concept of …
In summary, through the synergistic hydration reaction and mutual excitation of the components, the performance of gypsum-based composite cementitious …
Gypsum plaster is the material used to manufacture drywall, and fiberglass matting covers the board's sides. Depending on the drywall manufacturer, fire-resistant elements may be added to the gypsum plaster to make the completed product resistant to fire and other exterior conditions. It typically comes in four-by-eight-foot wide panels.
Gypsum & Aluminium Ceiling Tiles/Boards & Fittings Kingdom of Middle East is the leading importers, distributors and retailers of building material supplies in the Sultanate of Oman. It specializes in Aluminum Extruded Profiles, Aluminum Accessories, Glass, Glass Accessories, Timber Products and hardware items.
the concrete resistance to acids can also be provi ded by giving its surface an acid resistant coating. In Fig. 2, two ordinary concrete cylinders having the same mix design are shown. The cylinde ...
Various reinforcement types, such as fibers, polymers, and particles, are meticulously evaluated for their contributions in augmenting mechanical properties, …
1. Introduction. Gypsum, one of the most important cementitious materials, has been widely utilized for the construction of civil engineering, assistance in bone regeneration, retardation on cement, soil amendment, processing of building materials with multifunction, sculpting of art models and other application fields [[1], [2], [3]].There are …
Oman: USG Zawawi Drywall SFZ 's US$37m state-of-the-art gypsum plant in Oman's Salalah Free Zone (SFZ) was inaugurated on 6 May 2015 marking the formal start of commercial production of a range of Sheetrock brand gypsum wallboard products earmarked primarily for export across the Middle East and Indian subcontinent. USG …
Request PDF | On Oct 1, 2016, Gladis Camarini and others published Effect of citric acid on properties of recycled gypsum plaster to building components | Find, read and cite all the research you ...
1. Introduction. Concrete durability refers to the resistance of concrete against the action of aggressive environmental media which threaten the normal service of concrete components [].The actions of these aggressive environmental media are usually summarized as acid attack [], sulphate attack [], and chloride-induced corrosion [].In the …
Acid rain poses a significant threat to buildings, both modern and historical, around the globe. When you consider the chemical composition of acid rain, primarily a mix of sulfuric and nitric acids formed from the reaction of water vapor with sulfur dioxide (SO2) and nitrogen oxides (NOx) in the atmosphere, it's clear why it can be so damaging.
The performance of composite gypsum at elevated temperatures depends on the treatment temperature and reflects the combined effects of gypsum phase …
The experiments also showed that PG treated by 20 % or 50 % concentration sulfuric acid over 2 h at 60 °C meets the gypsum and cement …
With the rapid advancement of industrial production, the substantial accumulation of industrial by-product gypsum containing high salinity, acidity/alkalinity, …
This resistance results from the gypsum's chemically combined water, which releases steam when heated, which slows down the passage of heat. ... Builders in Oman can improve a building's overall safety and structural integrity and provide better fire protection for its occupants by using gypsum boards in their designs. Additionally, the …
Effect of gypsum addition on acid resistance of Ye'elimite rich calcium sulfoaluminate cement. Home / ... Room 205, Building Sciences Block (BSB) Department of Civil Engineering Indian Institute of Technology Madras Sardar Patel Road, Adyar Chennai, Tamil Nadu - 600036, India.
The acid resistance of concrete specimens was influenced by the type of original aggregate used, regardless of whether it was natural or recycled aggregate. As depicted in Fig. 2, the G-NQ specimens, which utilized quartz aggregate, demonstrated superior acid resistance compared to those made with natural limestone (G-NL). …
Peng Jiahui et al. [8], for instance, studied the influencing factors of citric acid on the retardation of building gypsum. The results showed that pH and temperature had a great influence on retardation. Huang Yuyan et al. [9] found that black tea alters the gypsum hydration process, decreases the hydration rate and prolongs the setting times ...
Section snippets Materials and mixtures. In this experimental work commercial gypsum plaster (β-hemihydrate – CaSO 4 ·0.5H 2 O), gypsum plaster waste (dihydrate – CaSO 4 ·2H 2 O) and citric acid as admixture was used. Commercial plaster is found in the market and the recycled gypsum plaster (RGP) was obtained from the …
1. Introduction. Gypsum is a material widely employed in the construction industry due to its excellent properties such as low thermal conductivity, light weight, fire resistance, and relative ease of handling [1], [2].Phosphogypsum, a byproduct from the processing of phosphate rock, is chemically similar to natural gypsum and holds a …
19.2. Deteriorating effect of acid on alkali-activated concretes. Concrete is in imbalance with its environment due to its alkaline structure. In order for hydrated compounds to be stable, Ca 2+ and OH − ions must be in the appropriate concentration range. As the pH of the solution that alkali-activated concretes are exposed to …
Building gypsum or gypsum binder (CaSO 4 ·0.5H 2 O) is made of natural or industrial by-product gypsum by heating and dehydration at a specific temperature. Although human beings have used gypsum for a long time, the problem of poor water resistance of gypsum has not been effectively solved, and most of the treatment …
Gypsum blending in a ye'elimite rich CSA cement used in this study led to poorer acid resistance. Poorer resistance of gypsum-blended CSA cement was due to reduced amount of aluminium hydroxide and monosulfate. ... municipal sludge and kaolin clay in building brick manufacture: Crystalline transformation, morphology observation …
Delayed AFt formation is more significant in systems with a mass ratio lower than 4:1 for aluminate cement to FGD gypsum. Recently, water-resistant binders using 20–40 % FGD gypsum along with FA and Portland cement ratios of 1:3, 2:3, and 3:3 were prepared by Wansom et al., [84]. Generally, gypsum dissolves on water treatment, and …