— As for the grouting restoration materials for old masonry buildings, previous scientific researchers paid less attention to the sulfate and sulfuric acid resistance of grouting materials. Therefore, the application prospect of this study is great, and it will also attract the attention of ancient building restoration workers to the durability ...
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— The practical application of FGD gypsum in four fields—building materials, agriculture, material synthesis, and soil—and its impact on the environment, are analyzed. ... Lactic acid gypsum ...
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— Resistance to acid, alkali, chloride, and carbonation in ternary blended high-volume mineral admixed concrete ... Ekkeri Prakash Sumukh d Sustainable …
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— DOI: 10.1016/J.CONBUILDMAT.2011.06.072 Corpus ID: 136559540; Effect of citric acid on setting inhibition and mechanical properties of gypsum building plasters @article{Lanzn2012EffectOC, title={Effect of citric acid on setting inhibition and mechanical properties of gypsum building plasters}, author={Marcos Lanz{'o}n and Pedro Antonio …
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— The results show that the addition of polymer has a great influence on the compressive strength and carbonic acid resistance of concrete. ... Building gypsum is easily affected by moisture, which ...
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— 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 ...
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— 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 ...
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— This study aims at evaluating acid resistance of a high ye'elimite CSA cement (with and without external gypsum) in two different acidic environments. Furthermore, a …
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— Calcium sulfoaluminate (CSA) cements exhibit useful properties such as shrinkage compensation. 9. and rapid strength development. Acid resistance of CSA …
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— Gypsum and its derivatives have garnered significant attention as inorganic, eco-friendly building materials. Gypsum building products encompass gypsum powder, …
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— Gypsum modification is an effective strategy to improve the water resistance of magnesium oxychloride cement paste (MOCP), but its early-ages performance evolution has not received much attention. The exothermic characteristics and hydration kinetic parameters of MOCP with different contents and types of gypsum are investigated. The …
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— Huseien and Shah demonstrated that self-compacting alkali-activated fly ash concrete exhibited better sulfuric acid attack resistance as compared to alkali-activated slag [22]. The formation of gypsum in alkali-activated slag was identified as the primary cause of the poor mechanical performance [22].
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— 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 …
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— 1. Introduction. Gypsum is a widely applied green and recyclable material, and it is an indispensable and important cementitious material. As a non-structural material, gypsum can be utilized for floors, boards and wall-fillings [1], [2], [3], [4].When applied, hemihydrate gypsum (CaSO 4 ·0.5H 2 O) powder is mixed with water, which forms a …
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— Phospho-gypsum is an industrial solid waste discharged from the phosphate production process. The waste includes complex impurities such as phosphoric acid and its salts, fluoride, and organics.
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— 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 affordable housing in developing …
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— 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 ...
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— 1. Introduction. Microbial-induced concrete corrosion (MICC) is a major peril to underground structures, precipitating material degradation and curtailing the lifespan of concrete [[1], [2], [3]].Bacteria-driven processes transformed sulfates into hydrogen sulfide (H 2 S), which then becomes corrosive sulfuric acid (H 2 SO 4), attacking concrete and …
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Review pages 15-17 of GA-600-2018 Gypsum is approximately 21 percent, by weight, chemically combined water, which greatly contributes to its effectiveness as a fire-resistive barrier. When a gypsum panel product or gypsum plaster is exposed to fire, the water is slowly released as steam, effectively retarding heat transmission. When gypsum …
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— Gypsum plays a crucial role in mitigating the spread of fire within buildings. The fire resistance of drywall and plaster is primarily attributed to the unique properties of gypsum. Fire-rated gypsum board …
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— The addition of known humid creep inhibitors to the gypsum samples, including boric acid, tartaric acid and 3,4,5-trihydroxybenzoic acid (gallic acid), was found to have little measurable effect ...
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Fire_Safety_Information (PDF) Passive Fire Resistance The passive fire resistance provided by fire-resistant rated gypsum based assemblies for walls, ceilings, floors, and other building systems, slows or prevents the spread of fire, allows time for evacuation, and limits fire damage. Passive fire protection measures are intended to contain a fire and …
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— This is due because C–A–S–H has a better acid resistance than C–S–H [68]. Once exposed to acid attack, the deterioration of C–S–H enhances the overall …
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— Fire-Resistant Construction: Gypsum board provides passive fire protection and is used to create fire-resistant walls and ceilings in buildings. Agriculture: Soil Conditioner: Gypsum is applied to agricultural soils to improve soil structure and reduce compaction. It can help in breaking up heavy clay soils, enhancing water infiltration, and ...
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— Portland Cement (PC) has poor resistance against aggressive acidic environment [1], [2].Acid attack is a commonly-observed phenomenon in sewer structures and is also referred as biogenic acid attack [3], [4], [5].As a result of acid attack, material loss occurs from the surface of a structure, leading to section and strength loss [6].A …
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— The utilization of desulfurized building gypsum as raw material for gypsum-based self-leveling mortar (GSL) is limited by its low strength and poor water resistance. The objective of this study is to enhance comprehensive properties of GSL and prepare qualified desulfurized building gypsum-based self-leveling mortar that can be effectively …
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Gypsum Decorative Materials. In Building Decorative Materials, 2011. 4 Applications of Building Gypsum. Building gypsum is used as heating resistant, moisture preserving, sound absorbing and fire proofing material. As a building decorative material, it is widely used in ceiling and partition projects. Building gypsum can be used to manufacture concrete, …
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— Introduction. Phosphogypsum is a solid waste formed during the production of phosphoric acid by a wet-process [1]. The primary chemical composition of phosphogypsum is CaSO 4 ·2H 2 O, which is comparable to that of natural gypsum [2]. The preparation of gypsum plaster (β-CaSO 4 ·0.5H 2 O) at a certain calcination temperature …
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— Silver Spring, MD – December 19, 2018 – The Gypsum Association (GA) is pleased to announce the release of GA-600-2018 Fire Resistance and Sound Control Design Manual.Revised on a three year cycle, GA-600 has been referenced by the model building codes as a source of fire-resistive designs for more than 40 years.
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