Þorbjörg Sævarsdóttir, University of Canterbury

Þorbjörg Sævarsdóttir, University of Canterbury New Insulating Precast Concrete Panels. Concrete Conventional concrete is a poor insulating material but has good thermal mass Lightweight concrete provides good insulation at the price of thermal mass Precast concrete walls systems provide poor thermal and acoustic performance. Precast concrete can however provide high quality products which ...

Construction aggregate - Wikipedia

Construction aggregate, or simply "aggregate", is a broad category of coarse to medium grained particulate material used in construction, including sand, gravel, crushed stone, slag, recycled concrete and geosynthetic aggregates. Aggregates are the most mined materials in …

Common Uses for Slag | National Slag Association

Blast furnace slag products have been used successfully in virtually all phases of bridge construction. Projects such as the bridge pictured here can utilize blast furnace slag as a concrete aggregate.

Towards Sustainable Self-Compacting Concrete: Effect of ...

Portland granulated ground blast furnace slag cement, which is produced from rapidly water-cooled blast furnace slag, has been successfully used in concrete mixes due to its pozzolanic activity. Although many studies have been conducted on the evaluation of steel slag usage, as coarse aggregate in road construction and use of blast furnace slag in concrete mixes, fewer studies have been ...

Site Contents - Transportation Research Board

This paper presents results of an experimental work carried out to evaluate utilization of recycled materials, such as fly ash and bottom ash (by-products of thermoelectric power plants), and blast furnace slag (by-products of ironworks) as binders and aggregates with high volume in high-strength, lightweight mortar. The effects of high volumes of fly ash, blast furnace slag, and bottom ash on ...

Tarmac | Blast Furnace Slag

By casting the molten slag into a cold water vapour via a rotating drum, the slag is cooled rapidly forming lightweight aggregate pellets with high fire rating properties that are perfectly suited for use in ready-mixed concrete, precast concrete and masonry.

3 Iron Unit Recycling - Department of Energy

3 Iron Unit Recycling On a weight basis, steel is the most recycled material in use today (Figure 3-1). The 70 million net tons of steel recycled in 2000 were used to produce about 112 million net tons of new steel in the United States.

Sustainable Shotcrete Using Blast-Furnace Slag

Sustainable Shotcrete Using Blast-Furnace Slag By Philip Sawoszczuk, Dr. Michelle Nokken, and Dr. Marc Jolin T wo shotcrete mixtures were designed based on sustainability for use in mining ground support. The sustainable shotcrete mixture contained both fine and coarse pelletized blast-furnace slag aggregates. The control mixture contained regular concrete sand as the fine aggre-gate and ...

Advances in slag recycling and reuse - UK Essays

In the past, slag was taken from the blast furnace, basic oxygen furnace (BOF), and electric arc furnace (EAF) and hauled off to a hazardous dump site where millions of tons have accumulated. The major waste by product from steel production is slag at 79.15% as shown in 1. Steps have been taken all over the world to generate new ways of recycling or to reuse slag material. Advances have made ...

Use of Recycled Aggregates in Construction - ccaa.com.au

Description Foamed blast furnace slag (FBS) is a by-product of iron slag produced in a similar way to granulated blast-furnace slag but with a controlled amount of water, applied to the molten slag to trap the steam in the mass, giving a porous, pumice-like product.

Mechanical properties of self-consolidating concrete ...

Ground granulated blast furnace slag (GGBS), due to its pozzolanic nature, could be a great asset for the modern construction needs, because slag concretes can be of high performance, if ...

Blast Furnace Slag | National Slag Association

Air-cooled Blast Furnace Slag rip rap The largest slag aggregate, riprap is a permanent cover of rock used to stabilize shorelines and streambanks, and prevent erosion along slopes and embankments. It is also used in gabion baskets, Mineral Wool manufacture (insulation), and lightweight fill.

Blast Furnace Slag - Material Description - User ...

Pelletized blast furnace slag has been used as lightweight aggregate and for cement manufacture. Foamed slag has been used as a lightweight aggregate for Portland cement concrete. Granulated blast furnace slag has been used as a raw material for cement production and as an aggregate and insulating material. and granulated slag have also been used as sand blasting shot materials. Ground ...

Construction aggregate - Wikipedia

Construction aggregate, or simply "aggregate", is a broad category of coarse to medium grained particulate material used in construction, including sand, gravel, crushed stone, slag, recycled concrete and geosynthetic aggregates. Aggregates are the most mined materials in the world. Aggregates are a component of

Properties of sustainable concrete containing fly ash ...

The first contained Portland cement, the second contained 50% cement and 50% blast furnace slag and the third contained 30% cement and 70% slag. The complete proportions for the mixes containing recycled concrete as aggregate are given in Table 4 .

Recycling of ladle furnace slags - Research Online

Recycling of ladle furnace slags Abstract Ferrous industry slag is waste product of all steelmaking manufactures. These materials should be reused or

88 IRON AND STEEL SLAG - USGS

Iron (blast furnace) slag accounted for about 47% of the tonnage sold and had a value of about $260 million; nearly 90% of this value was from sales of granulated slag. Steel slag produced from basic oxygen and electric arc furnaces accounted for the remainder. 2 Slag was processed

Lightweight Recycled Blast Furnace Slag

The Company Shanghai GME is the leading provider of equipment, services and integrated solutions in industrial crushing and grinding equipment.

"Chapter 3 Fly Ash,Slag,Silica Fume,and Natural Pozzolans"

Fly Ash, Slag, Silica Fume, and Natural Pozzolans Fly ash, ground granulated blast-furnace slag, silica fume, and natural pozzolans, such as calcined shale, calcined clay or metakaolin, are materials that, when used in conjunc- tion with portland or blended cement, contribute to the properties of the hardened concrete through hydraulic or pozzolanic activity or both (Fig. 3-1). A pozzolan is a ...

Use of Blast Furnace Slag Aggregate in Concrete - IJSER

Use of Blast Furnace Slag Aggregate in Concrete K.G. Hiraskar and Chetan Patil Abstract- The Iron industries produce a huge quantity of blast furnace slag as by–product, which is a non–biodegradable waste material from that only a small

Ground Granulated Blast Furnace (GGBF) Slag Used in ...

voluminous of usable recycled materials. In 1997, 21.4 million tons of iron and steel slag were consumed in the U.S. When molten, slags float on the metal. Separating is not exact, so it is preferable to have some metal in the slag rather than slag in the metal. The molten slag is allowed to cool and solidify. Blast furnace slag and steel furnace slag are then crushed and screened to make the ...

SLAG CEMENT AND THE ENVIRONMENT

The Slag Cement Association is the leading source of knowledge on blast-furnace slag-based cementitious products. We promote We promote the increased use and acceptance of these products by coordinating the resources of member companies.

Blocks compared Concrete aggregate aircrete clay and hemp

Lightweight blocks are manufactured from cement together with one of a variety of natural or man-made expanded aggregates including: granulated / foamed blast-furnace slag, expanded clay or shale, furnace bottom ash (FBA), pulverised fuel ash (PFA), or the less common pumice (a volcanic material) . The density of the aggregate is generally proportional to the strength of the block - so for ...

By Hendrik G. van Oss - USGS

the chemistry of granulated blast furnace slag is unsuitable, or the material has been inadequately quenched, or the slag is weathered (old slag piles), the slag may lack cementitious

lightweight recycled blast furnace slag - villa-dante.eu

UG-Mat Blast Furnace Slag | Recycled Materials ... - RMRC. Blast Furnace Slag - Material Description ORIGIN In the production of iron, iron ore, iron scrap, and fluxes (limestone and/or dolomite) are charged into a blast ...

22 questions in Lightweight Concrete | Science topic

“Use of Blast Furnace Slag Aggregate in Concrete By K.G. Hiraskar and Chetan Patil Abstract- The Iron industries produce a huge quantity of blast furnace slag as by–product, which is a non ...

Oil palm shell lightweight concrete containing high volume ...

This paper presents the results of experiments conducted to produce green structural lightweight concrete by using oil palm shell (OPS) as coarse aggregate, and ground granulated blast furnace slag (GGBFS) as a supplementary cementing material at 30%, 50% and 70% replacement of cement, and exposed to different curing conditions.

Matrix Materials - Recycled Materials

Air Cooled Blast Furnace Slag:- Primary imported from France and Belgium we can supply most grades from water treatment to general 100mm down. Internal to the UK materials can also be supplied in similar sizes.

crushing lightweight slag aggregate - sgpgc.org

Blast Furnace Slag Blast Furnace Slag is formed when iron ore or iron pellets, coke and a flux (either limestone or dolomite) are melted together in a blast furnace [Get Price] Slag Processing, Aggregate, and Equipment - ,

Tarmac | Slag Aggregates

In concrete, processed steel and blast furnace slag provide a sustainable alternative to primary aggregates in the production of lightweight or dense ready-mixed concrete. Blast furnace slag can also be used to make Ground Granulated Blast-furnace Slag (GGBS) which is used as a cement replacement in concrete.