benefit of slag and fly ash in concrete composition


Study on Properties of Geopolymer Concrete Made with ...

materials, fly ash and slag are the most potential source of geopolymers. 2. LITERATURE REVIEW Ganapati Naidu. P, A.S.S.N.Prasad reported in this paper that an attempt is made to study strength properties of geopolymer concrete using low calcium fly ash replacing with slag in 5 different percentages. Higher concentrations

Get More

What are the advantages and disadvantages of using Fly ash ...

Fly Ash concrete is resistant to acid and sulphate attacks. The shrinkage of fly ash concrete is very less. The use of fly ash gives concrete good work ability, durability and finish. Read also: Difference between Clay Bricks vs. Fly Ash Bricks. Disadvantages of Fly Ash. The quality of fly ash can affect the quality and strength of Cement ...

Get More

Effect of Supplementary Cementitious Materials on the ...

activity of fly ash at room temperature is that the pH of the solution 13 does not meet the requirements of fly ash, 13.3 [10]. Slag forms as a waste product from both ferrous and nonferrous metals industries. High-slag-cements have low strength at early ages. This is due to the slow hydration reaction of slag. Unlike fly ash, slag's ...

Get More

EFFECT OF SILICA FUME ON STEEL SLAG CONCRETE

Jan Bijen3 has studied the benefits of slag and fly ash added to concrete made with OPC in terms of silica reaction with alkali, sulfate attack. L. Lam, Y.L. Wong, and C.S. Poon4 in their study entitled Effect of fly ash and silica fume on concrete …

Get More

(PDF) Development of Fly Ash Composite Binder and ...

Then, other solid wastes (14.26 wt% flue-gas desulfurization gypsum, 9.9 wt% fly ash, and 1 wt% carbide slag) were blended with the CM to prepare ready-to …

Get More

Frontiers | Basic Properties of fly Ash/Slag -Concrete ...

As a kind of granular waste with complex composition and alkali corrosiveness, concrete slurry waste (CSW) has severe recycling limitations in the ordinary Portland cement (OPC). Considering this, a new type of geopolymer, prepared by granulated blast furnace slag/fly ash, concrete slurry waste, and powdered activators (sodium carbonate and different silicon sources …

Get More

Slag Cement: Performance and Sustainability Benefits

Performance and Sustainability Benefits. Slag cement, like portland cement, is a hydraulic cement—it chemically combines with water to set and harden. Because slag cement has a more consistent chemical and physical structure than fly ash, it produces cement paste and concrete with more consistent performance results.

Get More

Denis Higgins PhD MSc BSc Cementitious Slag Makers …

A UK Concrete Industry Alliance project studied the relative environmental benefits of using ggbs and pfa in concrete. The calculated environmental impacts per tonne of concrete, relative to a reference Portland cement concrete are shown in Table 6, for concretes of the same 28-day strength ('C30') Impact PC 50 % ggbs 30% fly ash

Get More

Fly ash and slag - ScienceDirect

Concrete mix with the FA addition shows better workability due to the increased content of fine fraction in the concrete composition (cement, ash) owing to the difference in specific density of fly ash (2.0÷2.5 g/cm 3) in relation to cement density (3.0÷3.2 g/cm 3).

Get More

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

Fly ash is used in about 50% of ready mixed concrete (PCA 2000). Class F fly ash is often used at dosages of 15% to 25% by mass of cementitious material and Class C fly ash is used at dosages of 15% to 40% by mass of cementi-tious material. Dosage varies with the reactivity of the ash and the desired effects on the concrete (Helmuth 1987 and

Get More

Product - PT. Slag Berkat Utama

Fly Ash. Basic properties and influence of fly ash. Fly ash is the waste generated by coal-fired power plants after burning powdered carbon. It is the burning of volatile substances when pulverized coal passes through the high temperature area of the furnace, and the mineral impurities such as clay and quartz in the pulverized coal are at high temperature.

Get More

Why use Fly Ash and Slag in Concrete? - Bay-Lynx ...

Another difference between slag and fly ash is that while fly ash will rarely surpass 35% of the cement content, slag can substitute 50% of the cement content, or even higher for different applications. This contributes to the large …

Get More

Fly Ash in Concrete | Advantages & Disadvantages of Fly ...

Fly Ash in Concrete. Fly ash in concrete provides good use of portal cement hydration products. Calcium as well as alkali hydroxide solutions, that are emitted into the porous system of the paste, mix with fly ash particles, creating a cement medium, and the heat generated by hydration of portal cement is a significant factor in the initiation of a fly ash reaction.

Get More

Using Recycled Industrial Materials in Roadways

• Concrete aggregates can include bottom ash, foundry sands, reclaimed concrete, and blast furnace slag. • Portland cement can contain fly ash, FGD gypsum, foundry sands, drywall, blast furnace slag, and steel slag. 3 Asphalt Surface Blast furnace slag, steel slag, and boiler slag can replace aggregate in the asphalt surface layer.

Get More

FLY ASH CONCRETE - WHAT ARE THE REASONS FOR ADDING FLY ASH …

Fly ash in concrete contributes to a stronger, more durable, and more chemical resistant concrete mix. The main benefit of fly ash for concrete is that it not only reduces the amount of non-durable calcium hydroxide (lime), but in the process converts it into calcium silicate hydrate (CSH), which is the strongest and most durable portion of the ...

Get More

RESEARCH ARTICLE OPEN ACCESS Experimental Analysis of ...

concluded several beneficial effects of addition of silica fume to the fly ash cement mortar in terms of strength, workability and ultra sonic velocity test results. Jan Bijen 3 have studied the benefits of slag and fly ash added to concrete made with OPC in terms of alkali-silica reaction, sulphate attack.

Get More

Bricks made of coal fly-ash and slag, cured in the open ...

TY - JOUR. T1 - Bricks made of coal fly-ash and slag, cured in the open air. AU - Freidin, K. AU - Erell, E. PY - 1995/1/1. Y1 - 1995/1/1. N2 - Volume mass, compressive strength, water uptake and water absorption of pressed test samples made of a mixture of coal fly-ash, slag and sodium silicate solution (water-glass) were determined.

Get More

Mechanical and thermal charactristics of self-compacting ...

Mechanical and thermal charactristics of self- compacting concrete produced with blast furnace slag and fly ash Samiha E. Alharthya and Mostafa A. Mostafab aConstruction Research Institute, National Water Center, Cairo, Egypt; bProperties and Testing Materials, Construction Research Institute, National Water Research Center, Cairo,

Get More

Factors Affecting Kinetics and Gel Composition of Alkali ...

The AAS mortars were prepared by mixing slag, pulverized fly ash, or silica fume, with an alkaline solution and fine aggregate. The oxide composition of raw materials including binder and aggregate determined by X-ray fluorescence (XRF) spectrometer is listed in Table 1 .

Get More

10.1016/0950-0618(95)00014-3 | DeepDyve

OPBFSC 40 fly ash Cement type Number of cycles Figure 13 Loss of mass of concrete with Portland cement CEM I/42.5 or ordinary Portland blast furnace slag cement CEM III/B 42.5 with and without pfa during de-icing tests6 Portland cement Blast furnace slag cement Benefits of slag and fly ash: J. Bijen ash in concrete. A critical examination.

Get More

Supplementary Cementitious Materials — What, why, & how ...

Fly ash used in concrete should conform to the standard specification, ASTM C 618. The amount of fly ash in concrete can vary from 5% to 65% by mass of the cementitious materials, depending on the source and composition of the fly ash …

Get More

Microstructure of pretreated steel slag and its influence ...

1.Introduction. Steel slag (SS) is a major by-product of the smelting industry. It has been discarded consistently as waste and caused serious air, soil, and groundwater pollution, .To achieve the ability to recycle solid waste resources, developed countries such as the United States and Japan have applied SS in agricultural production, cement admixtures, and road …

Get More

(PDF) The Possibility of Using Slag for the Production of ...

The Possibility of Using Slag for the Production of Geopolymer Materials and Its Influence on Mechanical Performances—A Review. Download. Related Papers. Geopolymers as an alternative to Portland cement: An overview. By Hira Atiq. Handbook of low carbon concrete. By Fakhar Chaudhry. Development of Green Geopolymer Using Agricultural and ...

Get More

Benefits of slag and fly ash - ScienceDirect

The use of ground granulated blast furnace slag and powder coal fly ash as an addition to either cement or concrete is well-established. Concrete made with these secondary raw materials as a part of the binder does show distinctive advantages over concrete with Portland cement only.

Get More

Fly Ash, Slag, Silica Fume, and Natural Pozzolans, …

Fly ash is used in about 50% of ready mixed concrete (PCA 2000). Class F fly ash is often used at dosages of 15% to 25% by mass of cementitious material and Class C fly ash is used at dosages of 15% to 40% by mass of cementi-tious material. Dosage varies with the reactivity of the ash and the desired effects on the concrete (Helmuth 1987 and

Get More

(PDF) The Effect of Blast Furnace Slag/Fly Ash Ratio on ...

The Effect of Blast Furnace Slag/Fly Ash Ratio on Setting, Strength, and Shrinkage of Alkali-Activated Pastes and Concretes

Get More

The Difference in Slag Cement and Fly Ash - Slag Cement …

The Slag Cement Association with member company and industry input have broken down the differences in slag cement and fly ash and how they both affect concrete performance. 1: Slag cement has a more consistent chemical and physical structure than fly ash from source to source and from a single source.

Get More

CONCRETE Optimizing the Use of Fly Ash in Concrete

utilization of fly ash in concrete began (for example, USBR 1948) follow-ing the pioneering research conducted at the University of California, Berkeley (Davis 1937).The last 50 years has seen the use of fly ash in concrete grow dramatically with close to 15 million tons used in con-crete, concrete products and grouts in the U.S. in 2005 (ACAA ...

Get More

Geopolymer Concrete - Properties, Composition and Applications

Fly ash is the waste product generated from thermal power plant and ground granulate blast furnace slag is generated as waste material in steel plant. Both fly ash and GGBS are processed by appropriate technology and used for concrete works in the form of geopolymer concrete.

Get More

A Closer Look: Fly Ash, Slag Cement & Metakaolin ...

Slag cement is generally ground to less than 45 microns and has a specific gravity in the range of 2.85 to 2.95. Slag is generally used in higher percentages than fly ash, commonly constituting between 30% and 45% of the cementitious material in concrete, while some comprise as high as 70% or more of the cementitious material in a mix.

Get More

Why use Fly Ash and Slag in Concrete? - Bay-Lynx ...

Another difference between slag and fly ash is that while fly ash will rarely surpass 35% of the cement content, slag can substitute 50% of the cement content, or even higher for different applications. This contributes to the large cost savings from slag cement. Fly ash is more of a smooth particle rather than slag's rough and jiggered texture.

Get More

Slag Cement Benefits and Use in Concrete - Slag Cement News

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 …

Get More

(PDF) Use of Fly Ash and Slag in Concrete: A Best Practice ...

This Best Practice Guide shows that concrete in corporating fly ash and slag in proportions less. than 20 to 30%, and 25 to 35%, respectively, is generally considered equivalent to portland ...

Get More