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GGBFS Replacement for High Early Strength Concrete for ...

GGBFS Replacement for High Early Strength Concrete for Precast Industry Shivaprakash G, M-Tech Structure, Sr. Manager, Admixture and Surface Treatment, Fosroc Chemicals The Precast Concrete industry is one of the thriving industries in the wake of faster development with high quality standards. The initial capital cost for precast construction is higher than for conventional concrete

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Sustainable Studies on Concrete with GGBS As a Replacement ...

Sustainable Studies on Concrete with GGBS As a Replacement Material in Cement S. Arivalagan 1) ... since the grain size of GGBS is less than that of ordinary Portland cement, its strength at early ages is low, but it continues to gain strength over a long period. The optimum GGBFS replacement as cementation material is characterized by high compressive strength, low heat of hydration ...

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GGBS Concrete - CSMA - The Cementitious Slag Makers ...

Typically the 7-day strength of a ggbs concrete will be 55-65% of the 28-day strength compared to 70-80% for a similar CEM I Portland cement concrete. The reduction in early-strength will be more noticeable at high GGBS levels and low temperatures. Similarly low cement content concrete, kerb backing etc, the reduction will be magnified. Under normal circumstances, the striking times for ...

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Uses of GGBS - CSMA - The Cementitious Slag Makers Association

In the production of ready-mixed concrete, GGBS replaces a substantial portion of the Portland cement component, generally about 50%, but sometimes up to 70%. The higher the proportion, the better is the durability. The disadvantage of the higher replacement level is that early-age strength development is somewhat slower. Other forms of concrete

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A STUDY OF MEASURED AND PREDICTED EARLY AGE IN-SITU ...

The early age strength of concrete influences project duration through its effect on the minimum striking time of formwork. Accurate assessment of early age strength is a prerequisite to making a decision for striking formwork at optimal timings, especially for GGBS concretes. Increasingly, limestone cement is becoming the dominant cement type in Irish concrete practice. This paper reports an ...

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Sustainable Studies on Concrete with GGBS As a Replacement ...

Sustainable Studies on Concrete with GGBS As a Replacement Material in Cement S. Arivalagan 1) ... since the grain size of GGBS is less than that of ordinary Portland cement, its strength at early ages is low, but it continues to gain strength over a long period. The optimum GGBFS replacement as cementation material is characterized by high compressive strength, low heat of hydration ...

Get price

A STUDY OF MEASURED AND PREDICTED EARLY AGE IN-SITU ...

The early age strength of concrete influences project duration through its effect on the minimum striking time of formwork. Accurate assessment of early age strength is a prerequisite to making a decision for striking formwork at optimal timings, especially for GGBS concretes. Increasingly, limestone cement is becoming the dominant cement type in Irish concrete practice. This paper reports an ...

Get price

Uses of GGBS - CSMA - The Cementitious Slag Makers Association

In the production of ready-mixed concrete, GGBS replaces a substantial portion of the Portland cement component, generally about 50%, but sometimes up to 70%. The higher the proportion, the better is the durability. The disadvantage of the higher replacement level is that early-age strength development is somewhat slower. Other forms of concrete

Get price

Study Report on Concrete with replacement of Cement by GGBS

09/09/2017  GGBS concrete has slightly slower strength development at early ages, but will have equal if not greater strength at 28 days compared to non GGBS concrete. At 7 days GGBS concretes will have 50 to 60% of its characteristic strength compared to 70 to 80% for Portland cement only concrete at the same time. At 28 days GGBS concrete will have fully developed its characteristic strength

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GGBS: The Most Effective SCM For Concrete Concrete Show Blog

Its use in high strength concrete and high performance concrete is essential because of its characteristics of imparting early strength and early high impermeability to concrete. Fortunately, better local products are now available in India to replace SF/MS, such as UFS and UFFA. – RHA is a product, considered as waste product, produced from rice husk. But in India, it is generally burnt in ...

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Regen GGBS - Cement Substitute Hanson UK

Regen Ground Granulated Blast furnace Slag (GGBS) is a cement substitute, manufactured from a by-product of the iron-making industry. Using one tonne of Regen in concrete reduces the embodied CO2 by around 900kg, compared to using one tonne of Portland Cement, and also increases its durability. Regen is more sustainable than other cement substitutes such as Fly Ash.

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Effect of GGBFS on setting, workability and early strength ...

15/09/2014  GGBFS enhanced early strength development at ambient condition. ... and mortar mixtures were proportioned to study the effect of different mix variables which include the amount of GGBFS in replacement of fly ash, the amounts of alkaline activator solution, and the ratio of sodium silicate to sodium hydroxide solution (SS/SH or R). The mixture proportions of concrete and mortar

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EARLY AGE STRIKING OF FORMWORK TO GGBS CONCRETES: A ...

Such test results may particularly underestimate early age insitu strength of concrete made with GGBS. This adversely affects site practice through adherence to potentially pessimistic formwork striking times. This paper presents a proposed methodology to enable a contractor make an optimal determination of striking time for repetitive elements in a project, with particular relevance to GGBS ...

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Properties of Hardened Concrete with Blast Furnace Slag

The improvement of early age strength development depends on the amount of utilized fume. Lastly, Figure-3 illustrates the compressive strength development for controlled concrete and concrete replacement with different percent of slag. It can be noticed that the 40% replacement provided the best performance compared with controlled concrete and other replacement percentages. Figure-3 ...

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(PDF) Early-age heat development in GGBS concrete structures

It is a common concern that GGBS concrete lacks sufficient early-age strength, which prevents its application in cast-inplace structural concrete (Tang et al., 2015). To address this, GB/T 18046 ...

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Slag waste incorporation in high early strength concrete ...

20/01/2018  The high early strength cement is responsible for high strength at the early ages of hydration. This is why, high strength during the early age of ‘H’ series concrete is achieved. Although the strength depreciated with GGBS addition, the results at 30% replacement of cement with GGBS are very encouraging for application in precast industry.

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A STUDY OF MEASURED AND PREDICTED EARLY AGE IN-SITU ...

The early age strength of concrete influences project duration through its effect on the minimum striking time of formwork. Accurate assessment of early age strength is a prerequisite to making a decision for striking formwork at optimal timings, especially for GGBS concretes. Increasingly, limestone cement is becoming the dominant cement type in Irish concrete practice. This paper reports an ...

Get price

Regen GGBS - Cement Substitute Hanson UK

Regen Ground Granulated Blast furnace Slag (GGBS) is a cement substitute, manufactured from a by-product of the iron-making industry. Using one tonne of Regen in concrete reduces the embodied CO2 by around 900kg, compared to using one tonne of Portland Cement, and also increases its durability. Regen is more sustainable than other cement substitutes such as Fly Ash.

Get price

Study Report on Concrete with replacement of Cement by GGBS

09/09/2017  GGBS concrete has slightly slower strength development at early ages, but will have equal if not greater strength at 28 days compared to non GGBS concrete. At 7 days GGBS concretes will have 50 to 60% of its characteristic strength compared to 70 to 80% for Portland cement only concrete at the same time. At 28 days GGBS concrete will have fully developed its characteristic strength

Get price

GGBS: The Most Effective SCM For Concrete Concrete Show Blog

Its use in high strength concrete and high performance concrete is essential because of its characteristics of imparting early strength and early high impermeability to concrete. Fortunately, better local products are now available in India to replace SF/MS, such as UFS and UFFA. – RHA is a product, considered as waste product, produced from rice husk. But in India, it is generally burnt in ...

Get price

Effect of GGBFS on setting, workability and early strength ...

15/09/2014  GGBFS enhanced early strength development at ambient condition. ... and mortar mixtures were proportioned to study the effect of different mix variables which include the amount of GGBFS in replacement of fly ash, the amounts of alkaline activator solution, and the ratio of sodium silicate to sodium hydroxide solution (SS/SH or R). The mixture proportions of concrete and mortar

Get price

Concrete: Cement Substitutes - GGBS, PFA and more

Concrete made with GGBS cement sets more slowly than concrete made with ordinary Portland cement, depending on the amount of GGBS in the cement mix, but also continues to gain strength over a longer period leading to improved overall durability and life expectancy. Silica fume. Silica fume is a by-product from the manufacture of silicon. It is an extremely fine powder (as fine as smoke) and ...

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EARLY AGE STRIKING OF FORMWORK TO GGBS CONCRETES: A ...

Such test results may particularly underestimate early age insitu strength of concrete made with GGBS. This adversely affects site practice through adherence to potentially pessimistic formwork striking times. This paper presents a proposed methodology to enable a contractor make an optimal determination of striking time for repetitive elements in a project, with particular relevance to GGBS ...

Get price

Properties of Hardened Concrete with Blast Furnace Slag

The improvement of early age strength development depends on the amount of utilized fume. Lastly, Figure-3 illustrates the compressive strength development for controlled concrete and concrete replacement with different percent of slag. It can be noticed that the 40% replacement provided the best performance compared with controlled concrete and other replacement percentages. Figure-3 ...

Get price

Influence of GGBS on Mechanical Properties of High ...

Even for concrete with 50% GGBS, the strength was equal to that of control concrete at 56 days. Figure 3 Compressi ve Strength Vs Age of Concrete Up to 50% replacement, concrete with GGBS generally achieved strengths similar to control concrete till 28 days and after 28 days it exceeded the strength of control concrete. The reason is, GGBS is a

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