Effective Utilization of Fly Ash and Waste Gravel in Green Concrete by Replacing Natural Sand and Crushed Coarse Aggregate

Saxena, Shekhar; Pofale, A.D.

doi:10.1016/j.matpr.2017.06.266

Cited by 13 publications

(9 citation statements)

References 5 publications

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“…Impact loads are severely intense in nature and could occur within nanoseconds as the result of collisions, explosions, falling heavy objects, earthquakes, or wave effects on offshore structures [1][2][3][5][6][7][8]11,12,21,[24][25][26][27][28]. Structural responses to impact loads are categorized into three sections: (i) impulsive loading, where the impact duration ends before the structure reaches its maximum response; (ii) dynamic loading, where the structure reaches its maximum response almost simultaneously with the end of the impact duration; (iii) quasi-static loading, where the structure reaches its maximum response before the end of the impact duration.…”

Section: Rc Slab Behaviors Under Impact Loadsmentioning

confidence: 99%

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Failure Modes Behavior of Different Strengthening Types of RC Slabs Subjected to Low-Velocity Impact Loading: A Review

et al. 2023

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Concrete is brittle; hence, it is incredibly likely that concrete buildings may fail in both local and global ways under dynamic and impulsive stresses. An extensive review investigation was carried out to examine reinforced concrete (RC) slab behavior under low-velocity impact loading. Significant past research studies that dealt with experimental and numerical simulations and analytical modeling of the RC slabs under impact loading have been presented in this work. As a result, numerous attempts to define failure behavior and to assess concrete structures’ vulnerability to lateral impact loads have been made in the literature. Based on analytical, numerical, and experimental studies carried out in previous research, this article thoroughly reviewed the current state of the art regarding the responses and failure behaviors of various types of concrete structures and members subjected to low-velocity impact loading. The effects of different structural and load-related factors were examined regarding the impact strength and failure behavior of reinforced concrete slabs reinforced with various types of strengthening procedures and exposed to low-velocity impact loads. The reviews suggested that advanced composite materials, shear reinforcement, and hybrid techniques are promising for effectively strengthening concrete structures.

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Section: Rc Slab Behaviors Under Impact Loadsmentioning

confidence: 99%

“…Concrete is the most extensively used material on earth after water [1][2][3][4]. Globally, reinforced concrete structures are broadly constructed due to the beneficial properties of concrete, such as high ductility [5], low thermal expansion [6,7], high stiffness [2,7].…”

Section: Introductionmentioning

confidence: 99%

Failure Modes Behavior of Different Strengthening Types of RC Slabs Subjected to Low-Velocity Impact Loading: A Review

et al. 2023

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“…Major volume of concrete constitutes the aggregates, such as coarse aggregate and fine aggregate. The continued extraction of natural aggregates is leading to its depletion and increased its cost (Saxena and Pofale, 2017;Luhar et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Bond strength properties of confined and unconfined coconut shell aggregate concrete by beam splice test.

Sujatha¹,

Mathew²,

Nadir

2023

Sust. Agric. Food Env. Res.

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This study investigates the bond strength properties of a green concrete produced by replacing the coarse aggregate by an agricultural by product, coconut shell (CS). The bond between steel reinforcement and coconut shell aggregate concrete was studied by using 60 numbers of beam splice specimens. Confined and unconfined beam splice specimens were used. The effects of rebar diameter of lap splice and types of aggregate were investigated. It was observed that the percentage reduction in bond stress for 16 mm rebar unconfined beam splice specimens for various percentage replacements of CS from 25% to 100%, lies in the range of 6-8% compared to 12 mm rebar specimens. Whereas, for confined beam splice specimens the range of percentage reduction is 6-10%. For unconfined and confined beam splice specimens, percentage reduction in bond stress for 25% to 100% replacement by CS for each 25% increment was approximately in the range of 2-3%, 20-23%, 31-34% and 47-48% respectively with respect to normal concrete for both 12mm and 16mm rebar specimens. The percentage increase in bond stress by confining the specimens for various percentage replacements of CS and different size rebar lies in the range of 52-58%. Keywords: coconut shell aggregate concrete, bond strength of concrete, beam splice test

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“…In the cement industry, there are some records on its impact on the environment, such as the mathematical near relation to 1:1 between cement production and CO 2 emission into the atmosphere, the contribution of 7% of greenhouse gas emissions and the increase of 10% annual in its production worldwide 3,4 . For these reasons, circular economy policies have been implemented, both for their own waste and for waste from other processes, in order to produce products with less environmental impact 2‐6 . This also affects the reduction of costs per unit of volume of cement used and contributes favorably in the associated environmental problems.…”

Section: Introductionmentioning

confidence: 99%

Valorization of waste from sand wash muds of an aggregates plant: Evaluation as a supplementary cementitious material

Baena

Cabrera-Poloche

Tobón

et al. 2020

Int J Applied Ceramic Tech

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The reuse and reincorporation of waste generated in the production processes are becoming increasingly important in the world, due to the double effect that it has in terms of sustainability. The first one is the environmental factor, since the impact generated is reduced by reducing the amount of wastes. The second one is the financial factor, since new products are developed that companies did not initially have, generating financial profitability. Therefore, this research evaluates the possible reuse of waste from gravel and sand wash mud of an aggregate plant as a supplementary cementitious material (SCM) after being thermally activated, seeking to promote the circular economy in the construction materials sector. The physical, chemical, and mineralogical characterization of the waste is presented and its pozzolanic activity was evaluated by means of the SAI-strength activity index. It was found that despite its low content of clay minerals, the thermally activated waste had very good performance as SCM with SAI between 81 and 106 with a tendency to increase with the age of cure. Showing that this can be a very promising potential use for this kind of waste.

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Effective Utilization of Fly Ash and Waste Gravel in Green Concrete by Replacing Natural Sand and Crushed Coarse Aggregate

Cited by 13 publications

References 5 publications

Failure Modes Behavior of Different Strengthening Types of RC Slabs Subjected to Low-Velocity Impact Loading: A Review

Failure Modes Behavior of Different Strengthening Types of RC Slabs Subjected to Low-Velocity Impact Loading: A Review

Bond strength properties of confined and unconfined coconut shell aggregate concrete by beam splice test.

Valorization of waste from sand wash muds of an aggregates plant: Evaluation as a supplementary cementitious material

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