Evaluation of Properties of High-Volume Fly-Ash Concrete for Pavements

Kumar, Binod; Tike, G. K.; Nanda, Pradipta Kumar

doi:10.1061/(asce)0899-1561(2007)19:10(906)

Cited by 84 publications

(31 citation statements)

References 4 publications

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“…In the modern context, sorption has been defined as the absorption of water by capillary pores, and its transport by capillary action (Gummerson et al, 1980;Hall, 1989). Traditional pozzolans such as coal fly ash, silica fume and ground granulated blastfurnace slag have been used to improve the strength and durability of cementitious materials (Ann et al, 2008;Berndt, 2009;Jerath and Hanson, 2007;Kou et al, 2004Kou et al, , 2008Kumar et al, 2007;Malhotra andMehta, 1996, 2002;Mehta and Monteiro, 2006;Mindess et al, 2003;Neville, 2000). The primary effect of the pozzolans on moisture transport characteristics is through refinement of the capillary pore size distribution, and increasing the discontinuity and partial filling of capillary pores.…”

Section: Sorptionmentioning

confidence: 97%

Green and durable mortar produced with milled waste glass

Nassar

Soroushian

2012

Magazine of Concrete Research

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The concept of using milled waste glass as partial replacement for cement in cement paste and mortar was investigated to reduce the adverse environmental and energy impacts of cement and cement-based products. Based on the experimental investigations it was found that waste glass, when milled to micro-scale particle size, undergoes pozzolanic reaction with cement hydrates. These reactions bring about favourable changes in the structure, including pore system characteristics of the hydrated cement paste and mortar. Use of milled waste glass, as partial replacement of cement, produced significant gains in the resistance to moisture sorption, chemical stability and improvement in microstructure of the cementitious materials. Milled waste glass was also found to suppress alkali–silica reactions. Unlike normal pozzolanic reactions, those involving glass do not reduce the alkalinity of cement paste; this is favourable to the chemical stability of cement-based materials and the protection of reinforcing steel against corrosion in concrete.alues derived using available design codes.

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Section: Sorptionmentioning

confidence: 97%

Green and durable mortar produced with milled waste glass

Nassar

Soroushian

2012

Magazine of Concrete Research

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“…In practice, a large portion of concrete mixture designs used in the United States contain fly ash. Recently, interest has developed in increasing the volume that fly ash is used to replace cement in concrete (Atis, 2003;Kumar et al, 2007;Mehta, 1999), leading to the production of high volume fly ash (HVFA) concretes.…”

Section: Introductionmentioning

confidence: 99%

Reducing Cracking in Concrete Structures by Using Internal Curing with High Volumes of Fly Ash

Barrett

Varga

Weiss

2012

Structures Congress 2012

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High volume fly ash (HVFA) concretes have been used in the past; however HVFA has been primarily advocated for use in mass construction applications. Recent interest in developing more sustainable construction materials has led to an increased interest in utilizing these HVFA mixtures in transportation structures such as pavements and bridges. These mixtures have a reduced carbon footprint, in addition to other improvements in the material performance. This paper presents a study utilizing the dual ring test to assess the benefits of the HVFA mortar mixtures with respect to reducing early age cracking. Three mortar mixtures were prepared with a water-to-cement ratio of 0.30. The first mixture is a plain cement mortar, the second mixture is a mortar where 40 % of the cement (by volume) was replaced with C class fly ash, and the third mixture is a mortar where 40 % of the cement (by volume) was replaced with C class fly ash and prewetted lightweight aggregate (LWA) to provide internal curing (IC). The cracking potential due to thermal and autogenous shrinkage was assessed. Results show a lower risk of shrinkage cracking in the HVFA mixture with internal curing. The IC mixture made using HVFA is more robust for construction at early ages.

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“…Long-term performance was evaluated, and the pavement sections containing high volumes of Class F fly ash (35-67% FA) concrete performed well in the field with only minor surface scaling (Naik et al 2003). Compressive and flexural strengths at ages of 7, 28, 90, 180, 256 and 365 days, drying shrinkage and abrasion resistance of concrete were conducted on concrete mixtures, which were substituted 20%, 30%, 40%, 50% and 60% fly ash in all control mixtures (Binod Kumar et al 2007). The laboratory test results showed that high-volume fly-ash (HVFA) concrete mixtures containing 50-60% fly ash can be designed to fulfil the requirement of strength and workability suitable for cement concrete pavement construction.…”

Section: Introductionmentioning

confidence: 99%

Development of lower shrinkage and reflection material for concrete pavement

Ryu

Kim

2015

International Journal of Pavement Engineering

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This study focuses on the development of a high performance concrete material for concrete paving with lower shrinkage and reflection of sunlight. Based on a literature review, alternative mixes for paving are suggested. The results of the laboratory experiments indicated that the contrast and reflectivity values of the concrete mixes with a variety of black pigment do not significantly vary provided that the mix contains 3% black pigment. When optimised aggregate gradation (OAG) is incorporated into the mix design, the strength and freeze -thaw resistance of the concrete significantly improves. In addition, the use of fly ash in the mix design reduces the dry shrinkage and alkali -silica reaction of the concrete and improves its resistance to the permeation of chloride ion. In summary, the mix design that uses fly ash (25% replacement), black pigment (3% addition) and OAG is found to be the most effective mix for concrete pavement.

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Evaluation of Properties of High-Volume Fly-Ash Concrete for Pavements

Cited by 84 publications

References 4 publications

Green and durable mortar produced with milled waste glass

Green and durable mortar produced with milled waste glass

Reducing Cracking in Concrete Structures by Using Internal Curing with High Volumes of Fly Ash

Development of lower shrinkage and reflection material for concrete pavement

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