Study on the Reactivity Activation of Steel Slag through Autoclaving Curing

2007 ◽  
Vol 334-335 ◽  
pp. 525-528
Author(s):  
Yong Quan Lin ◽  
Zi Yun Wen ◽  
Yong Min Yang ◽  
Yi Bo Yang ◽  
Dong Lin
Keyword(s):  
Blast Furnace ◽  
High Strength Concrete ◽  
Blast Furnace Slag ◽  
Steel Slag ◽  
High Strength ◽  
Steam Curing ◽  
Granulated Blast Furnace Slag ◽  
Concrete Pile ◽  
Curing Condition ◽  
Furnace Slag

Feasibility study of partially replacement of cement and ground sand by ground steel slag (GSS) and ground granulated blast furnace slag (GGBFS) in producing prestressed high strength concrete pile (PHC) was conducted. The results showed that under normal curing（20oC, 95% RH）and the steam curing condition (80oC), GSS possessed less reactivity than GGBFS. However, under autoclave curing condition (180 °C, 1.0MPa), the reactivity of GSS can be effectively activated. The autoclaving strength of the concrete made from 20% GSS with Blaine 550m2/kg, 55% cement and 25% ground sand could reach 89.0 MPa which is not only higher than that of GGBFS (82.8MPa), but also higher than that of traditional PHC concrete (83.9Mpa, 70% cement and 30% ground sand). It’s feasible to produce PHC concrete by GSS with high fineness and optimized dosage.

scholarly journals Development of Alkaline Activated High Strength Concrete using Fly Ash - Ground Granulated Blast Furnace Slag - Metakaolin as Binders and Manufacturing Sand as Fine Aggregate

2020 ◽  
Vol 9 (4) ◽  
pp. 903-911 ◽  
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
High Strength Concrete ◽  
Blast Furnace Slag ◽  
High Strength ◽  
Fine Aggregate ◽  
Cement Concrete ◽  
Strength Concrete ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

Structures built with normal concrete are fading out from the construction industry due to the development of high strength concrete. The massive structures such as sky scrapers, bridges, tunnels, nuclear plants, underground structures need high strength concrete to withstand the high intensity vertical, horizontal and moving loads etc. The development of high strength alkaline activated concrete will reduce the usage of cement in construction community. Lesser the utilisation of cement will lessen the high emission of carbon dioxide gas into the atmosphere. In this study, high strength concrete using alumina and silica rich materials are made with a mix ratio of 1:1.31:2.22. The water to cement ratio for high strength cement concrete and the alkaline solution to binder ratio for alkaline activated concrete are kept as 0.35. Low calcium fly ash, Ground Granulated Blast Furnace Slag (GGBS) and Metakaolin are used as binders and Manufacturing Sand is used as fine aggregate to made high strength alkaline activated concrete. The high strength alkaline activated concrete tests results are better than the high strength cement concrete.

Effect of Ground Quartz Sand and Ground Granulated Blast-Furnace Slag on Properties of High-Strength Concrete in the Steam and Autoclaved Curing

2014 ◽  
Vol 1033-1034 ◽  
pp. 878-881
Author(s):  
Yan Yan Hu ◽  
Ting Shu He ◽  
Xian Zhe Zhang
Keyword(s):  
Compressive Strength ◽  
Blast Furnace ◽  
Quartz Sand ◽  
High Strength Concrete ◽  
Blast Furnace Slag ◽  
High Strength ◽  
Strength Concrete ◽  
Granulated Blast Furnace Slag ◽  
Compressive Strength Of Concrete ◽  
Furnace Slag

High-strength concrete in the autoclaved-curing was made by the way of mixing single and double doped. The compressive strength of concrete and the morphology of hydrates in concrete containing ground granulated blast-furnace slag (SG) and Quartz sand (QS) have been investigated using XRD and SEM measurements. The results show that quartz sand also possesses effective pozzolanic property in the steam-autoclaved stage. The mixed proportion of QP:SG=1:1 is the best when the dose is 30%.The paste became denser through double mixing. When the doses is 10-35%, SG for the improvement of concrete compressive strength is higher than the quartz sand.

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