Recycling of phosphogypsum to prepare gypsum plaster: …
Actually, PG is a high-grade gypsum resource with CaSO 4 ·2H 2 O content above 90%, indicating recycling potential in gypsum binding materials production [17]; however, PG inevitably contains impurities, ... Anhydrite binder calcined from phosphogypsum[J] Ceramics, 2 (2010), pp. 152-159.
Calcined gypsum–lime–metakaolin binders: Design …
Calcined gypsum–lime–metakaolin binders: Design of optimal composition. A. Vimmrová, M. Keppert, +1 author. R. Černý. Published 1 September 2014. Materials …
Materials | Free Full-Text | Calcium-Based Binders in …
For example, traditional binder cement generates as much as 5% of artificial CO 2 emissions [17,18]. ... 30% calcined clay, and 5% gypsum; a higher substitution of 35% also shows comparable strength development. CC is now a common SCMs used to reduce cement use (to replace clinker up to 40–50%). ...
Calcium-Based Binders in Concrete or Soil …
Calcium-based binders, such as ordinary Portland cement (OPC) and lime (CaO), are the most common artificial cementitious materials used worldwide for concrete and soil improvement.
Effect of recycled lime sludge, calcined clay and silica fume …
The first binder was created by combining 95% clinker and 5% gypsum. The second binder consisted of 50% clinker, 30% calcined clay, 15% recycled lime sludge (RLS), and 5% gypsum.
(PDF) Development of limestone calcined clay cement (LC3 …
the limestone, calcined clay, gypsum, and OPC used to prepare the LC 3 binder are presented in T able 1. Standard fine sand with a fineness of 2. 67 was used to
Physical and mechanical properties of calcined …
Download scientific diagram | Physical and mechanical properties of calcined gypsum. from publication: Durability analysis of seashore saline soil bound with a slag compound binder | In this paper ...
Examination of the system fly ash–lime–calcined gypsum…
1. Introduction. The system fly ash–lime–calcined gypsum–water is called FaL-G binder because it can be hardened by means of hydration reactions. FaL-G binder finds application in the manufacture of building ceramics (bricks, hollow bricks, tiles and hollow blocks). FaL-G technology is based on the use of industrial wastes (fly ash and ...
Sustainability of gypsum products as a construction material
β-Hemihydrate (also known as plaster of Paris) is the most commonly used gypsum binder in construction. It is produced in an apparatus connected to air. Different equipment is used, depending on the required quality of finished product and its subsequent application. ... Estrich gypsum is high-temperature calcined gypsum obtained at a …
(PDF) A review on Limestone Calcined Clay Cement (LC3) as …
An investigation was made to formulate a durable gypsum binder based on calcined phosphogypsum, fly-ash/granulated blast-furnace-slag and Portland cement. In this binder, phosphogypsum acts as the ...
The Strength of Backfills Stabilised with Calcined Gypsum
The production of stabilised backfill at mine sites commonly uses Portland cement as the binder. Calcined gypsum has cementing properties and is cheaper to produce than cement. This paper discusses the strength of fills stabilised with calcined gypsum. Laboratory tests were carried out on specimens prepared from tailings obtained from four …
Thermal analysis of ternary gypsum-based binders stored …
Although gypsum belongs to the low-energy environmentally friendly binders, its wider applications in building constructions are limited due to the negative effect of moisture on its mechanical properties. When calcined gypsum (CaSO4·1/2H2O) transforms into its hydrated form (CaSO4·2H2O), it is partially soluble in water and it has …
Investigation of a durable gypsum binder for building materials
Testing and evaluation of gyl~um binder Gypsum binder prepared by blending the calcined gypsum ~-CaSO4.1/= H20), specific surface 3200 crrF g-1 (Blaine's), with the ground granulated slag, 4200 cm2 g-1 (Blaine's), or fly ash, 4000 cm 2 g-~ (Blaine's), and a retarder was tested for different properties as per IS:4031-1968, methods of physical ...
Influence of the Calcination Temperature of …
Natural gypsum is a mineral binding material, which is extracted during the process of partial dehydration of natural gypsum stone (dihydrate calcium sulphate) from …
Gypsum Products | SpringerLink
When gypsum is heated at about 150–160 °C, it loses approximately three-quarters of its water in a partial dehydration process and becomes hemihydrate gypsum (CaSO 4 •½H 2 O) or calcined gypsum; it is also known as beta gypsum (alpha gypsum is made by processing batches of gypsum under elevated pressure). Calcined gypsum …
Impacting factors and properties of Limestone Calcined
The factors such as the type and purity of kaolinite, limestone, gradation of the limestone, concentration of gypsum, calcined clay, limestone ratio, clinker content, water-to-binder ratio, method ...
Thermal analysis of ternary gypsum-based binders …
When calcined gypsum (CaSO 4 ·1/2H 2 O) transforms into its hydrated form (CaSO 4 ·2H 2 O), it is partially soluble in water and it has a relatively low strength. This …
Calcined gypsum-lime-metakaolin binders: Design of …
Request PDF | Calcined gypsum-lime-metakaolin binders: Design of optimal composition | The effect of composition on the properties of calcined gypsum-lime …
Optimization of mechanical performance of limestone calcined …
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 …
Modified poly(carboxylate ether)-based superplasticizer …
Limestone (calcite) calcined clay cement (LC 3) is a promising low-CO 2 binder, but the low activity of calcite cannot compensate the reduction in clinker factor, resulting in low one-day strength and limiting its broad applications. As recent carbon capture and utilization technologies allow scalable production of vaterite, a more reactive …
Investigation of a durable gypsum binder for building …
Abstract. An investigation was made to formulate a durable gypsum binder based on calcined phosphogypsum, fly-ash/granulated blast-furnace-slag and Portland cement. In this binder, phosphogypsum acts as the basic matrix and a source of sulphate in the mixture of calcium, alumina and silica derived from the fly-ash/granulated-slag.
Development of eco-friendly binder using metakaolin-fly …
In an experimental work closest to the investigations of calcined gypsum-lime-metakaolin blends, Morsy et al. [15] analyzed a ternary binder with 30% fly ash, 40% metakaolin and 30% lime which was ...
Calcined gypsum-lime-metakaolin binders: Design of
The stabilization of earth materials with a mixture of gypsum (8-10 wt% of dry earth) and lime (2.5-5 wt%), named Alker [15], has been used since the 1980's for the production of adobe in Turkey ...
Limestone calcined clay cement (LC3): A sustainable solution …
Limestone calcined clay cement (LC3): A sustainable solution for mitigating environmental impact in the construction sector ... Limestone 30 %, Calcined Clay 15 % and gypsum 5 %, is found to be a suitable and sustainable alternative to preserve the ecosystem. ... The relationship between the water to binder ratios and 28-d CS has been examined ...
Examination of the system fly ash–lime–calcined gypsum…
Gypsum mortar, containing only calcined gypsum and sand was prepared as a reference material. Phase composition, microstructure, mechanical properties and water transport parameters were studied. While the strength of gypsum mortar stored in the water decreased by 90% at the age of one year, the strength of all materials with …
Carbon footprint analysis of calcined gypsum production …
Considering the ambitious carbon dioxide emission targets of the European Union and the contribution of cement industry to the total CO 2 emissions, the application of calcined gypsum as an alternative binder in some applications in the building industry can be perceived as a promising option (Lee et al., 2016, Vasconcelos et al., 2015 ...
Changes in structure and composition of gypsum …
Calcined gypsum is one of the oldest building binders, and seemingly, it is a thoroughly described material, whose behaviour is fully understood.
Calcined gypsum–lime–metakaolin binders: Design …
The experimental studies of the calcined gypsum–lime–metakaolin (CLM) binders presented in this paper showed that the addition of metakaolin to the …
Carbon footprint analysis of calcined gypsum production …
Calcined gypsum can be considered as one of possible options in that respect. However, although the environmental impact is an important issue, gypsum was analyzed only rarely and sufficiently accurate data are still missing. ... Hemihydrate gypsum is a very eco-efficient binder. Gypsum plasters were commonly used in the past and …
High-Strength and Heat-Insulating Cellular Building …
weight proportion of calcined gypsum (maximum 82.3%) represented the main concrete binder. Using moderate contents of coal fly ash (3.6–11.1%) together with perlite (4.6–6.4%) to reduce the pore size and silica fume (0.3–1.2%) with pozzolanic properties, the aim was to obtain a macrostructure