Functions of Admixture: To accelerate the initial set of concrete, i.e. to accelerate the rate of strength development at an early age. To dim the initial set i.e. to keep the concrete in a working position for a longer time for placement. Also, to enhance workability. To improve the penetration (flowability) and permeability of concrete.

Abstract. Shrinkage-reducing admixture (SRA) efficiency as a shrinkage mitigation technique has been proven for the alkali-activated slag (AAS) system. However, the controlling mechanism is a debatable subject. Moreover, it has been reported that SRA may retard strength development and slag hydration.

slag shows a great improvement in compressive strength. Similarly, there were many other studies on the carbonation of steel slag [31–33], furnace slag [34], fly ash [35–39], and slag [40]. When MS was exposed to a CO2-rich environment, it was easily carbonated to form calcite. Normally, both CaO and MgO contained in the MS can be …

The influence of the fineness and content of steel slag powder on the properties of composite admixture was studied by uniform experimental design. The fitting regression equation between the ...

Ground granulated blast-furnace slag (GGBFS), sometimes simply referred to as "slag", is a glassy granular material formed when molten blast-furnace slag is …

Abstract. To promote the large-scale application of ground granulated blast furnace slag powder (GGBFS) in the cement and concrete industry, high-performance …

Request PDF | On Dec 1, 2023, Yi Han and others published Effect of dry ice as admixture on engineering properties of alkali-activated slag: setting time, strength, and sustainability | Find, read ...

Ground-granulated blast-furnace slag (GGBS) with a basicity value of K b = (CaO + MgO)/(SiO 2 + Al 2 O 3) of 1.63 and chemical composition illustrated in Table 1 was used as precursor. Sand with a saturated surface dry of 2720 kg/m 3 as a fine aggregate was used at sand/slag ratio of 2 [40].A waterglass activator with Ms (i.e., silicate …

different admixtures used in concrete are as a follows: (1) Silica fume (2) Metakaolin (3) POFA (4) RHA (5) GGBS. (6) Fly Ash. • Every admixture is partially replaced with cement at. different ...

This study analyzes the feasibility of using stainless steel electric arc furnace(EAF)slag as composite cement admixture and the risk of leaching-out of heavy metals.The results show that the stainless steel EAF slag,mainly made up of Ca2SiO4,Ca3Mg(SiO4)2,some Cr-containing minerals and in small particle size,is easily ground and has cementitious …

A modifying admixture based on Linear Alkyl Benzene Sodium Sulfonate (LAS) has also been evaluated as a workability and cohesiveness enhancer for steel …

The magnesium slag is discarded from production of magnesium metal from dolomite. However the magnesium slag is slaked in some factories by means of sprinkling water to prevent from dust pollution. The possibility of slaked magnesium slag (SMS) to play a role of mineral admixture for concrete was investigated by experiments of mortars …

Materials. (1) Cement: For the blast furnace slag concrete test, OPC with a neness of 3,483 cm2/g produced in Korea was used as shown in Tables 3 and 4. 1. (2) GGBS: In addition …

Physical and mechanical properties variations of lithium slag were systematically investigated by three different ways such as physical, chemical activation, physical-chemical combined activation. Mechanisms of the cementitious properties and hydration process of lithium slag composite cement were studied by XRD and SEM. The …

Chemical Admixtures and Ground Granulated Blast-Furnace Slag. Since most chemical admixtures perform well in plain Portland cement mixtures and in …

DOI: 10.1016/J.CONBUILDMAT.2021.123619 Corpus ID: 236300914; Influence of magnesium slag as a mineral admixture on the performance of concrete @article{Ji2021InfluenceOM, title={Influence of magnesium slag as a mineral admixture on the performance of concrete}, author={Guangxiang Ji and Xiaoqin Peng and Shupin …

DOI: 10.1016/J.CONBUILDMAT.2012.02.085 Corpus ID: 135854309; Effect of blended steel slag–GBFS mineral admixture on hydration and strength of cement @article{Wang2012EffectOB, title={Effect of blended steel slag–GBFS mineral admixture on hydration and strength of cement}, author={Qiang Wang and Peiyu Yan and Guidong …

Types of GGBS are granulated slag, pelletized slag, expanded or ed slag, and air cooled slag. Among these most commonly granulated slag is used as …

Mixing 30 carbonated steel slag powder with P 42.5 % % ·I at 7 days and 47.5MPa at 28 days, along with a flexural strength of 6.2MPa at 7 days and 8.0MPa at 28 days. The addition of carbonated steel slag powder not only enhances the mechanical properties but also reduces the pore diameter in the hardened cementitious system. In 7 …

1. Introduction. Admixtures are added in concrete to improve the quality of concrete. Mineral admixtures include fly ash (FA), silica fume (SF), ground granulated blast furnace slag (GGBS), metakaolin (MK), and rice husk ash (RHA) which possess certain characteristics through which they influence the properties of concrete differently.The …

The rheology of waterglass-(Na 2 O·nSiO 2 ·mH 2 O) and NaOH-activated slag pastes and mortars depends on the nature of the alkaline activator used: in waterglass-activated slag pastes and mortars, the extensive structural breakdown under shear makes the Herschel-Bulkley model a better fit to the down ramp of the flow curve, …

Admixture is defined as a material besides concrete ingredients like aggregates, water, cement, and sand, mixed with the concrete to improve some of its properties in a hardened or fresh state. The concrete properties that are commonly modified are the setting times, workability, air entrainment, dispersion, and rate of hydration.

This research aims to reveal the effect of phosphorus slag (PS) admixtures on the properties and hydration mechanism of circulating fluidized bed fly ash (CFA)-based multi-solid waste cementitious material …

1. Introduction. Ferronickel slag is a solid waste produced in the industrial ferronickel alloys smelting process [[1], [2], [3], [4]].It is a kind of granular solid slag obtained by cooling the discharged slag after nickel and iron were extracted by reduction [5].Approximately 14 tons of ferronickel slag is discharged when a ton of ferronickel …

GGBFS is a byproduct of the iron and steel industry, specifically from the production of iron in blast furnaces. It is obtained by rapidly quenching molten slag from the blast furnace with water or steam, which results in the formation of glassy granules. These granules are then ground into a fine powder, which is GGBFS.

Lithium slag (LS) from lithium mica is the fastest growing solid waste in the Jiangxi Province of China in recent years, and a suitable utilization method has not been found. In this paper, the effects of LS on the physical and mechanical properties of white reactive powder concrete (WRPC) were investigated. The microstructure of the WRPC …

Ultra-fine slag (UFS) is a microfine material obtained from slag through controlled granulation which is a by-product of a steel plant with non-toxic and environment-friendly nature [15], [16]. To produce geopolymers it can be used as an additive as it is rich in SiO 2 and CaO. UFS improves the characteristics of fly ash based GPC [16], [17].

Materials. (1) Cement: For the blast furnace slag concrete test, OPC with a neness of 3,483 cm2/g produced in Korea was used as shown in Tables 3 and 4. 1. (2) GGBS: In addition to cement, GGBS ...

Ordinary Portland cement and ground granulated blast furnace slag were used as basic silicate precursors for the composition of mortars. The Portland cement was of the CEM I 42.5 R type supplied by the Mokrá (Heidelberg CZ) cement plant, while the granulated blast furnace slag was supplied by Kotouč, Štramberk (CZ).

In blast-furnace slag cement, where a certain portion of the cement is replaced with ground-granulated blast-furnace slag, the Ca 2+ ion concentration is lower and the hydration