Reviewing the behaviour of high volume fly ash based self compacting concrete

Singh, Navdeep; Kumar, Pawan; Goyal, Paresh

doi:10.1016/j.jobe.2019.100882

Cited by 103 publications

(31 citation statements)

References 52 publications

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“…Previous studies [5][6][7][8][9][10][11] revealed improvements in the mechanical properties and durability of concrete mixtures, in which PC was partially replaced with wood ash or fly ash. Substituting aggregates with wood process waste such as wood chips, flax or hemp was also shown to enhance the mechanical or thermal properties of concrete mixtures [11][12][13][14][15][16][17][18]. Further research on fiber-reinforced concrete reported that the addition of synthetic fibers-such as polypropylene (PP), polyethylene (PE), polyvinyl alcohol (PVA)-or steel fibers could increase the fire resistance, ductility, tensile strength, impact resistance and toughness of concrete mixtures [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Flexural Behavior of Sustainable Bamboo Fiber-Reinforced Mortar

Maier

Javadian²,

Saeidi³

et al. 2020

Applied Sciences

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In this study, a sustainable mortar mixture is developed using renewable by-products for the enhancement of mechanical properties and fracture behavior. A high-volume of fly ash—a by-product of coal combustion—is used to replace Portland cement while waste by-products from the production of engineered bamboo composite materials are used to obtain bamboo fibers and to improve the fracture toughness of the mixture. The bamboo process waste was ground and size-fractioned by sieving. Several mixes containing different amounts of fibers were prepared for mechanical and fracture toughness assessment, evaluated via bending tests. The addition of bamboo fibers showed insignificant losses of strength, resulting in mixtures with compressive strengths of 55 MPa and above. The bamboo fibers were able to control crack propagation and showed improved crack-bridging effects with higher fiber volumes, resulting in a strain-softening behavior and mixture with higher toughness. The results of this study show that the developed bamboo fiber-reinforced mortar mixture is a promising sustainable and affordable construction material with enhanced mechanical properties and fracture toughness with the potential to be used in different structural applications, especially in developing countries.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Flexural Behavior of Sustainable Bamboo Fiber-Reinforced Mortar

Maier

Javadian²,

Saeidi³

et al. 2020

Applied Sciences

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“…erefore, CBA utilization is the best way to minimize the environmental concern of CBA and also conserves natural resources [7][8][9]. CBA was recently applied in several fields, especially in the construction industry [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, CBA was recently used in the mixture of normal vibrating concrete and self-compacting concrete because the sizes of CBA and natural fine aggregate are similar and due to the pozzolanic activity of the CBA [11]. Several studies [16][17][18][19][20][21][22] actually reported that fine aggregates could be replaced by CBA in concrete fabrication.…”

Section: Introductionmentioning

confidence: 99%

Strength Properties of High‐Strength Concrete Containing Coal Bottom Ash as a Replacement of Aggregates

Yang

Park

Lê

et al. 2020

Advances in Materials Science and Engineering

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Most previous studies on the strength properties of coal bottom ash (CBA) concrete have focused on concrete with a normal compressive strength, and thus, studies on the strength properties of high-strength concrete (HSC) containing CBA are limited. Therefore, the effects of replacing fine aggregates with CBA and variations in the curing age on the strength properties of HSC with a compressive strength of greater than 60 MPa were investigated in this study. The different CBA contents included 25, 50, 75, and 100%, and the different curing ages were 28 and 56 days. The mechanical properties of the HSC with CBA incorporated as fine aggregates were examined. The experimental results revealed that CBA could be partially or totally substituted for fine aggregates during HSC production. The test results also showed that the compressive, splitting tensile, and flexural strengths of the HSC containing CBA fine aggregates slightly decreased as the CBA content increased. Moreover, useful relationships between the compressive strength, splitting tensile strength, and flexural strength were suggested, and the predictions reasonably agreed with the measurements. Compared to those of the control specimen, the pulse velocities of the HSC specimens at various CBA contents decreased by less than 3%. In addition, equations for predicting the strength values of CBA concrete by using the ultrasonic pulse velocity were suggested.

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“…The required workability of SCC is determined by the higher amount of fine particles to achieve suitable mobility of fresh mixture [ 37 , 38 ], especially cement and mineral additives. The denser structure of such concrete prevents the ingress of aggressive media, especially when low water to binder ratio is used [ 39 , 40 ]. On the other hand, the high content of fine particles could cause a significant increase of creep and shrinkage [ 41 ], which lead to the initiation of cracks.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Rational Design of Self-Compacting Concrete Incorporating Fly Ash and Limestone Powder in Terms of Long-Term Durability

et al. 2020

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Self-compaction concrete (SCC) is ranked among the main technological innovations of the last decades. Hence, it introduces a suitable possibility for further utilization of supplementary cementitious materials (SCM) in terms of sustainable development. The aim of the work is the assessment of a new approach to binder design, which takes into consideration the activity of the used mineral additive. The proposed approach, which allows a systematic design of a binding system with varied properties of the used mineral additive, was studied on ternary blends consisting of Portland cement (PC), limestone powder and fly ash (FA). The verification was conducted on SCC mixtures in terms of their workability, mechanical properties and the most attention was paid to long-term durability. The long-term durability was assessed on the basis of shrinkage measurement, freeze-thaw resistance and permeability tests including initial surface absorption, chloride migration, water penetration and an accelerated carbonation test, which was compared with the evolution of carbonation front in normal conditions. The durability of studied mixtures was evaluated by using durability loss index, which allow general assessment on the basis of multiple parameters. The carbonation resistance had a dominant importance on the final durability performance of studied mixtures. The experimental program revealed that the proposed design method is reliable only in terms of properties in fresh state and mechanical performance, which were similar with control mixture. Despite suitable results of freeze-thaw resistance and shrinkage, an increasing amount of fly ash in terms of the new design concept led to a fundamental increase of permeability and thus to decay of long-term durability. Acceptable properties were achieved for the lowest dosage of fly ash.

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Reviewing the behaviour of high volume fly ash based self compacting concrete

Cited by 103 publications

References 52 publications

Mechanical Properties and Flexural Behavior of Sustainable Bamboo Fiber-Reinforced Mortar

Mechanical Properties and Flexural Behavior of Sustainable Bamboo Fiber-Reinforced Mortar

Strength Properties of High‐Strength Concrete Containing Coal Bottom Ash as a Replacement of Aggregates

Assessment of Rational Design of Self-Compacting Concrete Incorporating Fly Ash and Limestone Powder in Terms of Long-Term Durability

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