The hydration and properties of composite cementitious pastes with 75% fluorgypsum were investigated; blastfurnace slag and metakaolin were the complementary cementitious materials. The pastes were cured under water at 20 °C for 360 days. All pastes developed and maintained strength under water, except those of commercial gypsum.
Physical properties of the slag shall be in accordance with the requirements for fineness as determined by air permeability and air content, slag activity index, and compressive strength. Scope 1.1 This specification covers three strength grades of finely ground granulated blast-furnace slag for use as a cementitious material in concrete and ...
Blast furnace slag (BFS) is a secondary material generated during the process of producing iron in blast furnaces, prompting scholars to concentrate on its efficient management and broad …
AbstractEttringite usually is formed in lime- and cement-stabilized gypseous soils, resulting in significant swelling upon wetting and thereby causing damage to pavements and foundation systems. To reduce the ettringite formation and the associated ...
Ground granulated blast furnace slag cement (GGBFS) is a fine glassy granules which contain cementatious properties. In this article we discuss about the manufacture, …
(GBS) is manufactured from molten blastfurnace slag, a co-product produced simulta-neously with iron. Rapid chilling with water or air forms a glassy granular material with latent-hydraulic …
The geotechnical properties of blast-furnace slag were investigated as a potential substitute for aggregates in the construction industry. The basic geotechnical parameters of …
The potential use of the slag material coud be as construction material but also as a potential source of some rare elements. Keywords: slag, melilite, fayalite, calcium disilicate, native iron, wüstite, magnetite, troilite, oldhamite. 1. INTRODUCTION The Galaţi blastfurnace, the largest in Romania, was built in the 1960s.
The use of ground granulated blastfurnace slag (GGBFS) is commonly in the formulation of several types of cement. For example, EN197 standard defines four types of cements: II/A-S (0–20%); II/B-S (21–35%), III-A (35–65%) and III-B (66–80%). The cements with GGBFS have several technical, economic and environmental advantages.
A novel and cost-effective method was developed for CO 2 incorporation into ground granulated blast furnace slag as distorted carbonates, and subsequent value-added use of the captured carbon dioxide towards enhancement of the alkali-activated slag binding qualities. The distorted carbonate structures formed in slag induce carbonation reactions in the course …
The main challenge of the steel industry for the next decade is the steel production transformation process, starting in Europe. The CO 2 intensive blast furnace/basic oxygen furnace (BOF) route will be substituted by a combination of Direct Reduced Iron (DRI), based on natural gas, later on "green" hydrogen, with an Electric Arc Furnace (EAF) or a Submerged Arc Furnace (SAF), …
Carbide sludge (CS)-activated ground-granulated blastfurnace slag (GGBS) can effectively stabilize clay slurry. However, in previous studies, the mechanical performance of CS–GGBS-treated slurry ...
This work investigates the behavior of a silty clay stabilized with 3, 6, 9, and 12 % of ground granulated blast-furnace slag (GGBS), respectively, and 1 % of quicklime used as an activator.
Ground granulated blast-furnace slag (GGBS) is a cementitious material produced as a by-product during the iron manufacture process. GGBS has similar chemical composition, mostly silica, calcium oxide, and alumina, to that of ordinary Portland cement (OPC) [1].Lots of studies have been carried out on the partial or full replacement of OPC with GGBS for …
Two of the most commonly used SCMs are fly ash (FA) [17] and ground granulated blastfurnace slag (GGBS) [18], whose chemical composition as well as physical properties govern their performance. The incorporation of SCMs were reported to increase the pozzolanic reaction, reduce porosity and improve the workability and durability of PC-based ...
Blast furnace slag (also called fine granulated blast furnace slag [GGBFS]) is a material that we call as one of the supplementary cementitious materials. Ground granulated …
The granulated blast furnace slag (GBFS) is an industrial by-product from the manufacture of pig iron and predominately consists of calcium-magnesium aluminosilicate glass (Gartner and Macphee, 2011; Bakharev et al., 1999). The slag in long-term stock not only occupies a great quantity of land, but gives rise to serious environmental pollution.
A study concluded that the inclusion of slag (30–50%) increased the workability of concrete mixes; although a higher slag concentration led to larger improvements . Higher slag fineness had no discernible impact on workability, and the authors of found that the workability of mortar decreased as GGBS surface area increased.
Cements Made From Blastfurnace Slag. Micheline Moranville-Regourd, Siham Kamali-Bernard, in Lea's Chemistry of Cement and Concrete (Fifth Edition), 2019. 10.4 Hydration Modelling of GGBS Cements. Although lots of experimental works are done on slag and slag cement hydration, computer modelling of these materials hydration remains an interesting ...
The study is the first to examine the combined use of blast-furnace sludge as a source of microelements and converter slag as a soil-deoxidizing agent in oat (Avena sativa L.) cultivation in sod-podzolic soils. It has been established that blast-furnace sludge is a highly dispersed waste, which contains about 50% iron, 7% zinc, and a small amount of calcium, …
While ultra-high performance concrete (UHPC) offers numerous advantages, it also presents specific challenges, primarily due to its high cost and excessive cement content, …
AbstractThe influence of low curing temperatures (5, 10 and 15 ± 2 °C) on the strength and durability properties of ground granulated blastfurnace slag (GGBS) and ground granulated Corex slag (GGCS) concretes was studied. A standard curing temperature of 23 ± 2 °C) was also used for comparative purposes.
01 Contribution to Resource and Energy Conservation and CO 2 Reduction. Through the use of Portland blast-furnace slag cement, we contribute to reducing the following environmental factors: Resource Conservation: When Granulated blast-furnace slag (GBFS) is used to replace ordinary Portland cement, the consumption of limestone raw materials is reduced, which leads to …
Blast furnace slag (BFS) which is defined "as the non-metallic product consisting essentially of silicates and alumina silicates of calcium and other bases, that is developed in a molten condition simultaneously with iron in a blast furnace" by ASTM C 125-16 (2016) has been widely used in construction industry for more than 80 years. When the mixture of iron-ore, …
Compressive strength and hydration characteristics of wastepaper sludge ash-ground granulated blastfurnace slag (WSA-GGBS) blended pastes were investigated at a water to binder (w/b) ratio of 0.5. The strength results are compared to those of normal Portland cement (PC) paste and relative strengths are reported.
2. Experimental 2.1. Materials An ordinary UK Portland cement (OPC), (Lafarge CEM I 52.5 N) with specific surface of 420 m2/kg, an Algerian granulated blastfurnace slag provided by the El-Hadjar steel factory and a UK granulated …
Three types of magnesia (MgO) with varying reactivity were used to activate ground granulated blastfurnace slag (GGBS) for soft clay stabilisation; the effect of MgO reactivity on the stabilisation efficacy was investigated. A range of tests were employed to study the mechanical and microstructural properties of the stabilised clays, including unconfined compressive …
This paper reviews a relatively recent approach towards sustainable soil stabilisation, by utilising ground granulated blastfurnace slag, an industrial by-product from steel manufacture. It describes in detail the reactions and reaction mechanisms that occur when soil modification and subsequent stabilisation processes take place. The effects of incorporating …
Granulated Blastfurnace Slag Granulated Blastfurnace Slag (GBS) is manufactured from molten blastfurnace slag, a co-product produced simulta-neously with iron. Rapid chilling with water or air forms a glassy granular material with latent-hydraulic properties. It is used for cement, concrete, mortar, grout and aggregates. For more informations on
The material used for the investigation was a BFS with a Blaine fineness of 500 m 2 /kg measured according to [20], density of 2900 kg/m 3 and mean particle size of (d 50) = 21.2 μm.X-ray diffraction analysis showed that the atomic structure of the slag was predominantly amorphous with traces of akermanite (Ca 2 MgSi 2 O 7), gehlenite (Ca 2 Al 2 SiO 7), hematite …