how does slag cement affect time of set

Slag Concrete

An interesting paper by Bakharev et al (2000) tried to rationalize the study of workability of concrete that incorporated alkali-activated slag as the only binder The activators were liquid sodium silicates (4 ± 7% Na, mass of slag) and a multicompound activator (NaOH + Na 2 CO 3) (8% Na, mass of slag)To ameliorate the workability, measured by the slump loss test, different additives have ....

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Portland cement

Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty groutIt was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin, and usually originates from limestoneIt is a fine powder, produced by heating limestone and clay minerals in a kiln to form clinker ....

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Slag Cement

If the slag cement particles are finer than the Portland cement particles, the rate of bleeding will decrease, and in contrast, if the slag cement particles are coarser than the Portland cement particles, bleeding will increase when substituted on an equal-mass basis The setting time of concrete containing slag cement is commonly retarded...

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What is the significance of setting time of cement?

* The time between the water is added to cement till it starts losing its plasticity is called as initial setting time * The time between which water added to cement till it has come in hardened state is called as final setting time * Setting tim....

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Properties of Concrete

Fresh concrete is that stage of concrete in which concrete can be moulded and it is in plastic state This is also called "Green Concrete" Another term used to describe the state of fresh concrete is consistence, which is the ease with which concrete will flow The transition process of changing of concrete from plastic state to hardened state...

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Slag Topic

May 01, 2020· Effect of Cement Composition on Fresh State and Heat of Hydration of Portland Cement with Limestone and Slag Publication: Materials Journal Date: 1/1/2020 Effects of Vinyl Acetate-Ethylene Emulsion on Setting Time and Mechanical Properties of Alkali-Activated Cementitious Materials...

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Blast Furnance Slag

They include Portland cement as covered by AASHTO M85 (2), Portland blast furnace slag cement (blended cement type IS), and slag cement (slag cement type S) as per AASHTO M240 (3) The use of GGBFS as a partial Portland cement replacement takes advantage of the energy invested in the slag making process and its corresponding benefits with ....

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(PDF) Setting of Alkali

The objective of this work was to determine the mechanisms that govern the setting times of alkali-activated slag (AAS) cement pastes, as a function of the nature of the alkaline activator used...

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Steel Slag

Carlos Thomas, , Francisco Agrela, in New Trends in Eco-efficient and Recycled Concrete, 2019 712 Types and classification of steel slags Steel slags (SSs) are usually classified according to the type of furnace in which they are produced The properties of the slag depend on the type of process used to produce the crude steel, the cooling conditions of the slag and the valorisation process...

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Cement hydration

Hydration products The products of the reaction between cement and water are termed "hydration products" In concrete (or mortar or other cementitious materials) there are typically four main types: Calcium silicate hydrate: this is the main reaction product and is the main source of concrete strength It is often abbreviated, using cement chemists' notation, to "C-S-H," the dashes indicating ....

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Slag Cement Benefits and Use in Concrete

Slag cement is commonly found in ready-mixed concrete, precast concrete, masonry, soil cement and high temperature resistant building products While there are many applications and benefits of slag cement, a few are highlighted below and detailed information sheets are located here...

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Retarders for Concrete

If concrete is correctly cured, retarded concrete should be just as durable as equivalent plain concrete Advantages of Retarder in Concrete Complex concrete placement or grouting Special architectural surface finish : exposed aggregate finish Compensating the accelerating effect of high temperature towards the initial set...

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What is Slag Cement? (with pictures)

Apr 26, 2020· Slag cement, often called ground granulated blast-furnace slag (GGBFS), is one of the most consistent cementitious materials used in concrete It is actually a byproduct of iron production When the iron is processed using a blast furnace, slag and iron both collect at the bottom of the furnaceThe molten slag must first be separated from the molten iron...

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how does slag cement affect time of set

How Does Slag Cement Affect Time Of Set How Does Slag Cement Affect Time Of Set We are a large-scale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment, milling equipment, mineral ,...

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Slag set time in cold weather

Dec 13, 2007· Slag set time in cold weather Slag set time in cold weather yahoo123 (Bioengineer) (OP) 13 Dec 07 15:10 Can someone tell me how much slag affects the set time of concrete? I asked for 15%-25% slag replacement because Type II cement is not readily available in the area This is for a digester tank containing wastewater...

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Blast Furnace Slag Cement

Pozzolana cement and blast-furnace slag cement have many common grounds in performance (see Table 46), such slow hydration, setting and hardening process, low early strength, high growth of the later strength, low heat of hydration, high corrosion, poor frost-resistance, and easy carbonization The water demand of pozzolana cement is large...

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Concrete Time Of Set

How Does Slag Cement Affect Time of Set? At temperatures less than 85 degrees Fahrenheit, concrete containing slag cement can have longer times of set, when compared with 100 percent portland cement concrete The lower the ambient and/or concrete temperatures, the slower the set times will be (Figure 1)...

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Setting Time of Cement Concrete

Setting Time of Cement 1 Initial Setting Time Initial Setting Time is defined as the period elapsing between the time when water is added to the cement and the time at which the needle of 1 mm square section fails to pierce the test block to a depth of about 5 mm from the bottom of the mould...

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