greening of slag cement

Ground Granulated Blast-Furnace Slag | SpringerLink

Abstract. Since the discovery of the latent hydraulic reactivity of ground granulated blast-furnace slag (ggbfs) by Emil Langen at the end of the 19th century, this material has been used successfully as cement and concrete addition.

Discoloration — What, why, & how? – Nevada Ready Mix

Concrete containing ground slag does, however, have a generally lighter color. The discoloration of concrete cast in forms or in slabs on grade is usually the result of a change in either the concrete composition or a concrete construction practice. ... "Surfaces Discoloration of Flatwork," Greening, N. R. and Landgren, R., Portland Cement ...

Blog Archives - conceptconcretewa

Greening Of Slag Cement Explained. Posted by admin In Blog. Greening Of Slag Cement Explained What Is Slag Cement? Slag cement is produced when granulated blast furnace slag (GGBFS) is grounded to an appropriate fineness and is used for replacing a portion of Portland cement. Slag cement is an Industrial by-product which is recovered from an ...

The greening of the concrete industry - ScienceDirect

Like fly ash, GGBFS also improves many mechanical and durability properties of concrete and generates less heat of hydration. For example, recently the nine foot thick foundation slab for a water treatment plant in New York City was constructed using 70% slag and 30% Portland cement.

Greening effect in slag cement materials - ScienceDirect

1. Introduction. In order to decrease the environmental impact of concrete within an environmentally sustainable design and reduce CO 2 emissions due to its production, Ground Granulated Blast-furnace Slag (GGBS), a glassy by-product of pig iron and steel manufacturing, is commonly used to produce blast-furnace slag cements and GGBS-concrete mixtures .

Greening of Slag Cement Concrete| Concrete Construction ...

Aug 31, 2011· Hardened concrete containing slag cement can show mottled green or blue-green areas on the surface in the first few days after placement. This temporary condition commonly is called "greening." Surface greening occurs in only a small percentage of concrete made with slag cement and does not affect concrete performance.

Life Cycle Of Steel Slag - bgassociates.be

Greening of Slag Cement Concrete - Concrete Construction. We are using a concrete mix with 60% slag in architectural concrete and are having significant issues with the color of …

Slag Concrete - graniterock.com

Slag content concrete usually contains 30% slag or higher (by cementitous weight), and Graniterock has specially created LEED compliant mixes with substantial quantities of slag to meet the demands of today's green building initiatives. Ground Granulated Blast Furnace Slag is …

Why "Greening" Occurs| Concrete Construction Magazine ...

A.Jan Prusinski, P.E., executive director of the Slag Cement Association, explains why "greening" occurs and what to expect: The color you describe is caused by complex reactions between sulfide sulfur compounds in the slag cement and portland cement compounds.

Pay attention when planning concrete driveways - DearMonty

Jan 08, 2013· The slag may not be the cause of the problem. There are many materials used for base under concrete slab construction. What material one selects varies regionally on availability, the materials properties and the condition of the sub soil under the base.

Slag - Wikipedia

During the early 20th century, iron ore slag was also ground to a powder and used to make agate glass, also known as slag glass. Modern uses. Ground granulated slag is often used in concrete in combination with Portland cement as part of a blended cement. Ground granulated slag reacts with a calcium byproduct created during the reaction of ...

The Greening of the Concrete Industry - IASEM - Index

The Greening of the Concrete Industry Christian Meyer1) Department of Civil Engineering, Columbia University, New York, NY 10027-6699, U.S.A. [email protected] ABSTRACT Concrete is the most widely used construction material worldwide, with billions of tons produced every year. This volume alone is the basis for an enormous environmental

Slag Cement: Helping Concrete Perform Better - slideshare.net

Mar 16, 2019· Slag cement makes whiter concrete More reflective Improved safety Has been used to replace partially/fully white cement for some applications Portland Cement Slag Cement 0.540.53 0.50 0.62 0.46 0.6 0.64 0.69 0.63 0.20 0.30 0.40 0.50 0.60 0.70 Portland Fly Ash Slag Cement Slag + White Portland White Portland SolarReflectance 28.

Slag Cement Suppliers & Manufacturers - CEMEX USA

Slag cement lowers the heat of hydration of a concrete mixture, which reduces the risk of early age thermal cracking, a major benefit for large or mass concrete placements. It lowers the total alkalis of a concrete mixture thus reducing the risk of alkali-silica reactions. Equally important, slag cement delivers improved workability.

Greening the concrete jungle: how to make environmentally ...

Aug 21, 2017· Greening the concrete jungle: how to make environmentally friendly cement August 21, 2017 3.21pm EDT • Updated ... such as fly ash, slag or clay.

The Greening of the Concrete Industry | C. Meyer

The Greening of the Concrete Industry. ... In addition, two types of binding materials, namely, ordinary cement and activated slag were used. Full characterization for different agro-waste and ...

Benefits of using slag cement - American Concrete Institute

The hydration products of slag cement are generally found to be more gel-like (less crystalline) than the products of hydration of portland cement; thus, they reduce the permeability of the cement paste (ACI 233R). Slags are used as a replacement of portland cement in amounts typically between 25 and 70% of the total mass of cementitious material.

Greening effect in slag cement materials - CORE

Greening effect in slag cement materials . By Domitille Le Cornec, Qirong Wang, Laurence Galoisy, ... mix Portland cement/GGBS (30/70), concrete and mortar). ... This "greening effect" demonstrates a progressive oxidation of sulfide-based compounds initially contained in these materials during curing of GGBS bearing materials

"Ground Granulated Blast Slag (GGBS) In Concrete – A Review"

Two major uses of GGBS [2] are in the production of quality-improved slag cement, namely Portland Blast furnace cement (PBFC) and high-slag blast-furnace cement (HSBFC), with GGBS content ranging typically from 30 to 70% and in the production of ready-mixed or site-batched durable concrete.

The Greening of Civil Infrastructure | ASTM ...

Steel slag, a byproduct of converting iron to steel, is particularly well suited to civil engineering and infrastructure projects. Used as a substitute for natural aggregates, steel slag promotes a strong bond between the slag and asphalt, resulting in superior skid resistance and durability (see the sidebar, "Vroom Vroom").

Greening effect in slag cement materials | Domitille Le ...

Greening effect in slag cement materials. ... including insights on rheological effects, concrete color and "greening", and adequate curing. Moreover, an overview about relevant norms and ...

The Greening of Concrete - p2infohouse.org

The most common pozzolanic substitutes for cement in concrete are fly ash and GGBF slag, by-products of coal burning power generation and steel production, respectively. In the Eastern United States, both of these waste products are readily available and commonly used as cement substitutes.

Environment | EcoSmart Concrete

Oct 03, 2003· The EcoSmartâ„¢ Concrete Project’s objective is to minimize the greenhouse gas -GHG- signature of concrete by replacing Portland cement with supplementary cementing materials -SCMs- such as fly ash to the greatest extent possible while maintaining or improving cost constructability and performance.

Effect of Replacement of Slag on the Mechanical Properties ...

Effect of Replacement of Slag on the Mechanical Properties of Flyash Based Geopolymer Concrete K.Parthiban #1, K.Saravanarajamohan #2, S.Shobana #3, A.Anchal Bhaskar #3 #1 Assistant Professor #2 Professor and Associate Dean #3 Student School of …

DECRYPTAGE N°5 Greening of cement-based concretes ...

Greening of cement-based concretes containing blast furnace slag 1/5 Greening: a temporary colouring due to polysulfide ions, having no impact on concrete usage properties INTRODUCTION Since the late 19th century, blast furnace slag has been used in the manufacture of cements - mainly

concrete greening - Slag Cement

Figure 1: Greening occurred in concrete made with slag cement after forms were removed on the Canadian Chancery in Washington, D.C. Figure 2: Exposure to sunlight and air allowed the concrete surface at the Canadian Chancery to oxidize and lighten.

greening of slag cement - indrive-project.eu

A.Jan Prusinski, P.E., executive director of the Slag Cement Association, explains why "greening" occurs and what to expect: The color you describe is caused by complex reactions between sulfide sulfur compounds in the slag cement and portland cement compounds. Greening effect in slag cement materials Request PDF

CIP 23 - Discoloration - NRMCA Expanding the Concrete ...

CIP 23 - Discoloration ... on concrete containing ground slag as a cementitious material. This will disappear with time, generally within a one year period. Concrete containing slag cement ... Greening, N. R. and Landgren, R., Surfaces Discolora-tion of Flatwork, Portland Cement …

Blast Furnace Slag - Material Description - User ...

Although blast furnace slag contains a small component of elemental sulfur (1 to 2 percent), the leachate tends to be slightly alkaline and does not present a corrosion risk to steel in pilings (10) or to steel embedded in concrete made with blast furnace slag cement or aggregates. (11)

What is Slag Cement? (with pictures) - wisegeek.com

Jul 26, 2019· 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 …