Investigation of the strength of ground granulated blast furnace slag based geopolymer composite with silica fume

2020 ◽  
Author(s):  
Ankur Gupta
Keyword(s):  
Blast Furnace ◽  
Silica Fume ◽  
Blast Furnace Slag ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

scholarly journals Use of Slag from the Combustion of Solid Municipal Waste as A Partial Replacement of Cement in Mortar and Concrete

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1593
Author(s):  
Monika Czop ◽  
Beata Łaźniewska-Piekarczyk
Keyword(s):  
Blast Furnace ◽  
Portland Cement ◽  
Municipal Solid Waste ◽  
Silica Fume ◽  
Blast Furnace Slag ◽  
Waste Incineration ◽  
Municipal Solid Waste Incineration ◽  
Granulated Blast Furnace Slag ◽  
Mineral Additives ◽  
Furnace Slag

In Europe, the use of wastes in the cement and construction industry follows the assumptions of sustainability and the idea of circular economy. At present, it is observed that cement plants introduce wastes to the cement in the form of so-called mineral additives. The most often used mineral additives are: fly ash with silica fume, granulated blast furnace slag and silica fume. The use of mineral additives in the cement is related to the fact that the use of the most expensive component of cement—Portland cement clinker—is limited. The purpose of the article is a preliminary evaluation of the suitability of slag from the municipal solid waste incineration plant for its use as a replacement of cement. In this article, slag from the municipal solid waste incineration (MSWI) replaces cement in the quantity of 30%, and presents the content of oxides and elements of slag from the MSWI. The obtained results are compared to the requirements that the crushed and granulated blast furnace slag need to meet to be suitable for use as an additive of type II to the concrete. The conducted analyses confirmed that the tested slag meets the requirements for the granulated blast furnace slag as an additive to the concrete in the following parameters: CaO ≤ 18.0%, SO3 ≤ 2.5% and Cl ≤ 0.1%. At the same time, mechanical features were tested of the designed mortars which consisted of a mixture of Portland cement (CEM I) with 30% of slag admixture. The designed mortar after 28 days of maturing reached a compressive strength of 32.0 MPa, and bending strength of 4.0 MPa. When compared to the milled granulated blast furnace slag (GBFS), the obtained values are slightly lower. Furthermore, the hardened mortars were subject to a leachability test to check the impact on the environment. Test results showed that the aqueous extracts from mixtures with 30% of slag admixtures slightly exceed the limits and do not pose a sufficiant threat to the environment as to eliminate the MSWI slag from economical use.

The Durability of Partially-Damaged Concrete with the Addition of Silica Fume and Ground Granulated Blast Furnace Slag

2016 ◽  
Vol 711 ◽  
pp. 277-284 ◽  
Author(s):  
Walid A. Al-Kutti ◽  
Nabil M. Al-Akhras
Keyword(s):  
Electrical Resistivity ◽  
Blast Furnace ◽  
Portland Cement ◽  
Silica Fume ◽  
Blast Furnace Slag ◽  
Concrete Durability ◽  
Chloride Permeability ◽  
Granulated Blast Furnace Slag ◽  
Strength Capacity ◽  
Furnace Slag

This study investigates the durability of partially-damaged concrete with the addition of Silica Fume and Ground Granulated Blast Furnace Slag. Portland cement was replaced by 10% SF and 60% of GGBFS as a replacement of Portland cement. Thirty-six concrete cylinders (100 x 200 mm) were subjected to three compressive loading levels (50%, 75%, and 90% of its ultimate strength capacity). After 28 days of curing, the concrete specimens were experimentally tested for electrical resistivity, rapid chloride penetration (RCPT) and chloride migration coefficient (Dnssm) according to NT-BUILD 494. The experimental results showed that the GGBFS improves significantly the durability of concrete with the highest electrical resistivity and lowest chloride permeability compared to control and SF concrete and both SF and GGBFS had significant effect the concrete durability properties even when the concrete was subjected to compressive damage up to 90% of the compressive strength. A correlation between Dnssm and RCPT in partially damaged concrete was observed and an empirical linear relationship was developed to estimate Dnssm.

scholarly journals Experimental contribution to the study of the physic-mechanical behavior and durability of high-performance concretes based on ternary binder (cement, silica fume and granulated blast furnace slag)

2021 ◽  
Vol 16 (59) ◽  
pp. 344-358
Author(s):  
Ouahab Rahim ◽  
Djamel Achoura ◽  
Mohammed Benzerara ◽  
Céline Bascoulès-Perlot
Keyword(s):  
Blast Furnace ◽  
Mechanical Behavior ◽  
Silica Fume ◽  
Blast Furnace Slag ◽  
High Performance ◽  
Résistance À La Compression ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

Le béton à hautes performances (BHP) est un béton innovant largement utilisé dans la construction moderne. De nouvelles techniques de formulation et de conception du HPC ont permis d'obtenir des performances mécaniques et une durabilité remarquables par rapport au béton conventionnel. Les principaux avantages du HPC sont liés à sa faible porosité, sa très haute résistance mécanique et son excellente durabilité. La facilité d'application du HPC est obtenue par l'utilisation combinée de superplastifiant et d'ajout de minéraux, ce qui se traduit par une augmentation significative de la résistance à la compression tout en améliorant la maniabilité et la durabilité. L'utilisation d'un liant ternaire (ciment, fumée de silice et laitier granulé de haut fourneau broyé) dans la fabrication du HPC est une nouvelle avancée dans la construction durable qui offre des avantages économiques, techniques et écologiques. L'objectif de ce travail de recherche était d'améliorer les propriétés physico-mécaniques du HPC à base de liant ternaire en étudiant l'influence du remplacement du ciment par du laitier granulé et des fumées de silice. Les résultats des tests mécaniques montrent que les performances du HPC réalisé avec ces liants ternaires sont similaires au HPC témoin sans laitier granulé. Enfin, il est conclu que l'utilisation de tels liants est très bénéfique pour diminuer les problèmes environnementaux et améliorer la durabilité du HPC.

Effect of slag, silica fume, and finishing on the sorptivities of field concrete

2006 ◽  
Vol 33 (8) ◽  
pp. 1022-1026 ◽  
Author(s):  
Peter J Tumidajski
Keyword(s):  
Blast Furnace ◽  
Reinforced Concrete ◽  
Silica Fume ◽  
Blast Furnace Slag ◽  
Freezing And Thawing ◽  
Capillary Suction ◽  
Granulated Blast Furnace Slag ◽  
Cement Binder ◽  
Furnace Slag ◽  
Exposure Conditions

For Canadian Standards Association C-2 exposure conditions (i.e., nonstructurally reinforced concrete exposed to chlorides and freezing and thawing) after 1 year, the effect of cement binder and finishing techniques on the capillary suction sorptivities of commercially batched and field-placed, cured, and finished concrete is reported. It was found that the addition of 40% ground granulated blast furnace slag or 8% silica fume is very effective in reducing sorptivities of field concrete. Furthermore, finishing techniques that do not overwork the surface assist in reducing sorptivities of field concrete.Key words: capillary suction, saturation, sorptivity, silica fume, slag, finish.

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