Journal of Building Materials and Structures
Volume 3, Numéro 2, Pages 43-54
2017-01-01

Effect Of Content And Fineness Of Slag As High Volume Cement Replacement On Strength And Durability Of Ultra-high Performance Mortar



Authors : Gupta Souradeep .

Abstract

Replacement of cement by slag in ultra-high performance concrete (UHPC) makes it a green material for building and construction application. However, slag hydrates slower which delay strength gain in UHPC which can be addressed by using slag of high fineness. In this study, cement is replaced by slag at 20% and 60% by weight. Slag of three different fineness is used: 400±4 m2/kg, 556±5 m2/kg and 750± 5 m2/kg at constant water-binder ratio of 0.25 for all mixes. Compressive and flexural strength were measured for mechanical performance while water penetration test and chloride migration test were conducted to enumerate durability. Results show that early and late compressive strength and flexural strength are improved significantly by incorporation of slag with fineness 556 ± 5 m2/kg compared to reference and slag of 400 m2/kg fineness. However, at similar fineness 20% slag incorporation is found to produce higher early strength compared to 60% slag although 90 day strength for both replacement percentages are similar. On durability aspects it is found that slag with fineness of 556 m2/kg and 750 m2/kg demonstrates significantly lower penetration depth and very high resistance to chloride migration at 28 day and 90 day age irrespective of slag replacement percentage. The study suggests that slag of high fineness (about 556 m2/kg based on the study) and 20-60% cement replacement can significantly accelerate hydration and improve long term durability of UHPC mortar.

Keywords

Strength; Durability; Ultra-high performance concrete; Chloride migration; Water penetration

Les articles similaires

Effect Of The Heat Curing On Strength Development Of Ultra-high Performance Fiber Reinforced Concrete (uhpfrc) Containing Dune Sand And Ground Brick Waste

Safi Brahim .  Aboutair Amel .  Saidi Mohammed .  Ghernouti Youcef .  Oubraham Chahrazade . 
pages 40-46.

Mechanical And Durability Characteristics Of High Performance Concrete Using Copper Slag As Fine Aggregate

Singh Raghubir .  Khan Rizwan Ahmad . 
pages 277-291.

Effect Of Inclusion Of Crumb Rubber On The Unconfined Compressive Strength And Wet-dry Durability Of Cement Stabilized Clayey Soil

Yadav Jitendra Singh .  Tiwari Suresh Kumar . 
pages 68-84.

Résistance Et Durabilité Des Bétons Au Laitier De Haut Fourneau Pour Les Ouvrages Hydrauliques. Strength And Durability Of Blast Furnace Slag Concrete For Hydraulic Structures.

Hadj Sadok Ahmed .  Kenai Saïd .  Hassane Mohamed .  Touil Djamel . 
pages 29-37.

Behaviour Of High-strength Concrete Incorporating Ground Granulated Blast Furnace Slag At High-temperature

Saadi Imene .  Benmarce Abdelaziz . 
pages 106-116.

Formats de citation