Alkali-Activated Slag Concrete After 5 Years of Alkali
— This work assesses the long-term durability of alkali-activated alternative binders, namely slag, as compared to regular Portland Cement in concrete under Alkali-silica reaction conditions. Six mix designs were chosen for this study, two using Portland Cement as the binder, and four with slag as the alkali-activated precursor.
Setting Time of Cement Concrete – Stages and Processes
Final Setting Time is defined as the period elapsing between the time when water is added to cement and the time at which the needle of 1 mm square section with 5 mm diameter attachment makes an impression on the test block . 600 minutes is the maximum time specified for the final set for all the above mentioned Portland cements.
Why Slag Cement? | SCA
However, in the 1950s, slag cement became available in other countries as a separate product. The first granulation facility in the U.S. to make a separate slag cement product was Sparrows Point, Maryland, in the …
Properties of Hardened Concrete with Blast …
By and large, compressive strength of slag concrete gradually increases from 1-5 days and lower than that of concrete without slag, but slag concrete strength matches strength of controlled concrete from 7-28 …
Title No. 112-M28 Effect of Slag Cement on Drying …
Effect of Slag Cement on Drying Shrinkage of Concrete by Jiqiu Yuan, Will Lindquist, David Darwin, and JoAnn Browning ACI Materials Journal, V. 112, No. 2, March-April 2015.
Slag Cement University
Slag Cement University is a central source of educational resources on slag cement use in concrete construction for university professors and students. Professors can easily incorporate the content of Slag Cement University …
Use of Fly Ash and Slag in Concrete: A Best Practice Guide
— The setting time of slag concrete may be longer compared to portland cement concrete especially in cold weather. The slower set will depend on the reactivity of the slag and the
Setting Time Optimization of Excessive-Sulfate Phosphogypsum Slag
— The accumulation of phosphogypsum (PG) has become a significant environmental and economic challenge, making PG reuse an urgent concern. This study aims to explore the potential of combining PG with steel slag (SS), ground granulated blast-furnace slag (GGBS), and cement clinker (CC) to create excessive-sulfate …
FAQs
The lighter color of slag cement concrete (compared with concrete made with other cementitious materials - see photo) is generally considered to be a positive benefit, as it not only improves the aesthetic look of concrete, but also increases concrete's reflectivity (albedo) which provides greater mitigation of the "urban heat island effect ...
Slag Concrete
The Slag Cement Association (SCA) mentions some notable projects using slag cement that are rewarded by induction into a "Hall of Fame" including (i) 7 World Trade Center, Manhattan, NY (completed in 2006), where the inside concrete core was made with a 40% slag cement mix; (ii) Delaware Route 1 (completed in 2004) where 82 km (51 miles) of ...
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The American Concrete Institute (ACI) is a leading authority and resource worldwide for the development and distribution of consensus-based standards, technical resources, educational programs, certification programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a …
233R-17: Guide to the Use of Slag Cement in Concrete …
The use of slag cement as a cementitious material dates back to 1774, when a mortar was made using slag cement in combination with slaked lime (Mather 1957). In 1862, a …
Info Sheets
Hardened concrete containing slag cement may show mottled green or blue green areas on the surface in the first few days after placement. This temporary condition is commonly …
Applications of Cement
Water. You can use almost any natural water that is drinkable and has no pronounced taste or odor as mixing water for concrete. Excessive impurities in mixing water can affect setting time and concrete strength, and can also cause efflorescence, staining, corrosion of reinforcement, volume instability, and reduced durability.
(PDF) EFFECT OF SLAG CEMENT ON CONCRETE …
— effect of slag cement on concrete resistance against combined exposure to freeze-thaw and chloride ingress December 2021 Journal of Engineering Science and Technology 16(6):4687-4706
Effects of Slag Cement on Strength and Durability of …
Slag Cement's Effect On Concrete Typical replacement values Effects on compressive strength Reducing permeability Sulfate attack Mitigation Slag Cement and ... Set Time – Compressive Strength PC, PLC and Slag Cement 0. 50. 100. 150. 200. 250. 300. 350. 0. 1000. 2000. 3000. 4000. 5000. 6000. 7000. PC Type I. PLC Type. IL(10) PC 30% Slag.
Review Steel slag and its applications in cement and concrete
— Today, cement and concrete are some of the most consumed materials after water throughout the whole world. About 4.1 billion tons of cement are fabricated annually (half a ton per person) and half of this amount is produced by China [5].In addition, >1 m 3 of concrete per person is produced with Portland cement each year [6].Today, Portland …
Slag Cement
Supplementary cementing materials. Daman K. Panesar, in Developments in the Formulation and Reinforcement of Concrete (Second Edition), 2019 3.1.2 Slag cement. Slag cement is a by-product from blast furnaces that are used to make iron. Blast furnaces operate at a temperature of approximately 1500°C to melt iron oxide, coke, and fluxing …
Effect of slag cement on the properties of ultra-high performance concrete
— 1. Introduction. Ultra-high performance concrete (UHPC) or in a more specific form ultra-high performance fiber reinforced concrete (UHFRC) is a cementitious composite with superb mechanical and durability properties compared with ordinary concrete [1], [2].UHPC is characterized by a very low water-binder (w/b) ratio (0.16–0.20 …
Effect of binder and activator composition on the …
— The test matrix is divided into six sets, set 1 to set 4 investigate the variation of HF from 0.6 to 1.2 through Ms from 0.0 to 1.5 while the binder content is constant 400 kg/m 3 and W/B ratio of ...
Effect of Slag Characteristics on Adiabatic Temperature …
•Slag cement adiabatic temperature rise is dependent on the slag composition, with the Al 2 O 3 and MgO contents being important •Slag cement is slower reacting than OPC, but can produce higher adiabatic temperature rise in concrete than OPC after 7 days •Slag cement can reduce the temperature rise in mass concrete, and is
Slag and Exterior Concrete Durability
— Most of the people with whom we spoke, however, attribute these surface problems to contractors unfamiliar with finishing properties of GGBF slag concrete. A …
Slag and Exterior Concrete Durability
— Most of the people with whom we spoke, however, attribute these surface problems to contractors unfamiliar with finishing properties of GGBF slag concrete. A finisher used to working with a portland cement mix must be warned that a mix containing GGBF slag may require a slightly longer set time and that there will be a little …
Effect of Slag Cement on Drying Shrinkage of Concrete
The effect of a partial replacement of cement with slag cement on free shrinkage is evaluated for curing periods between 3 and 28 days. Mixtures include concrete containing different replacement levels of slag cement (30, 60, and 80% by volume) cast with limestone, granite, or quartzite coarse aggregate.
Using Slag to Enhance Concrete Performance
Using Slag to Enhance Concrete Performance. BY ANNE BALOGH. Added in the right proportions, groundgranulated blast-furnace slag can improve many properties of both …
The effect of particle sizes of steel slag as cement …
— The water-cement ratio (w/c) is set at 0.35 to achieve the HSC mix. The mixtures were designed to have a cubic compressive strength of over 60 MPa, which is a characteristic of high strength concrete. ... This decrease is ascribed to the dilution effect on cement due to the inclusion of supplementary materials. Furthermore, the FSS10 …
Microstructure and Durability of Ground Granulated Blast Furnace Slag
— The examined SC pastes needed more time to initially set, while the final setting time was the same for both SC and PC. ... Slag Cement in concrete and mortar, ACI 233R-03, American concrete institute, Farmington Hills, Michigan, 2003 ... (2012) Effect of particlesize of blast furnace slag on properties of portland cement. Proc Eng 27:231–236 ...
Carbonation of slag concrete: Effect of the cement …
— Before the start of the accelerated carbonation test (after 1, 3, 6 or 18 months curing), the initial value of the carbonation depth (x 0) was determined by the dyeing method as explained below.Subsequently, all sides of the concrete cubes (100 × 100 × 100 mm), except the one (moulding surface) which will be exposed to the environment with high …
Effect of calcium oxide on mechanical properties and microstructure of
— Alkali-activated slag (AAS) has the potential to be applied in winter construction due to its continuous hydration at subzero temperature. However, to further enhance the mechanical properties of AAS as structure repair material in cold regions, calcium oxide (CaO) at proportions of 1 wt%, 2 wt%, 3 wt% and 4 wt% were …
Greening effect of slag cement-based concrete: …
— Cements and GGBFS major composition was established by X-ray Fluorescence (XRF) with a Bruker S4 Explorer spectrometer, on fused beads. Data were recovered and processed with the SpectraPlus software (Table 1).GGBFS has usually noticeable amounts of sulfur, usually between 0.2 and 3.5 wt.%, mostly under reduced …
Research on Set Retarder of High and Super High Strength …
— The set of alkali-activated slag cement (AASC) and concrete and the measures for set-retarding were reviewed. Due to the fast set of high and super high strength alkali-activated slag cement and ...
Durability Properties and Microstructure of Ground …
— Ground granulated blast-furnace slag (GGBS) is a green construction material used to produce durable concrete. The secondary pozzolanic reactions can result in reduced pore connectivity; therefore, replacing partial amount of Portland cement (PC) with GGBS can significantly reduce the risk of sulfate attack, alkali–silica reactions and …