Characterization of eco‐friendly steel fiber‐reinforced concrete containing waste coconut shell as coarse aggregates and fly ash as partial cement replacement

Self Cite

The improvised construction techniques and utilization of industrial wastes in manufacturing concrete play a major role in sustainability. The artificially manufactured aggregates are gaining importance in the present era. The use of fibers as secondary reinforcement is greatly pronounced. Sintered fly ash aggregate concrete and normal aggregate concrete with and without basalt fiber with 28 days compressive strength of 30 Mpa were cast and tested. The stress–strain curve of the lightweight concrete has a lower modulus of elasticity when compared with the normal aggregate concrete. A simple linear relationship has been developed between the mechanical properties using regression analysis. The water absorption and void ratio had a direct relationship with the sorptivity and ponding of concrete. The strength and durability aspects of the lightweight aggregate concrete had better agreement with the requirements of the structural lightweight concrete. Strict adherence to codal provisions with respect to strength and durability can be made for improvised behavior.

Section: Resultsmentioning

confidence: 99%

Characterization and behavior of basalt fiber‐reinforced lightweight concrete

Divyah

Thenmozhi

Neelamegam³

et al. 2020

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“…Coconut shell (CS) is one of the most common wastes from agricultural industries generated in tropical countries, such as India. An acceptable strength criterion required for structural concrete was achieved by using CS as coarse aggregates 4,13 . CS is available abundantly in many coconut‐growing countries around the globe, including India, Indonesia and Malaysia.…”

Section: Introductionmentioning

confidence: 99%

An investigation of key mechanical and durability properties of coconut shell concrete with partial replacement of fly ash

Prakash¹,

Thenmozhi²,

Raman

et al. 2020

Self Cite

This study investigated the effect of adding fly ash on the mechanical and durability characteristics of coconut shell (CS) concrete. Two different mixes were developed, one with CS and the other with conventional aggregate and CS as coarse aggregate. Cement was replaced with Class F fly ash in terms of weight at 0, 10, 20, and 30% in both mixes. Test result showed that the CS concrete with 10% fly ash replacement level exhibited the highest compressive and tensile strength. The addition of fly ash decreased the porosity of CS concrete due to its fineness and increased hydration products in the matrix at later ages. Additionally, it also improved the weak aggregate interfacial transition zone of CS lightweight concrete. Thus, the fly ash addition in CS concrete showed lower values of water absorption, permeable voids, sorptivity, and chloride permeability. Furthermore, the increasing content of fly ash addition improved the durability characteristics of CS concrete considerably.

“…Raju and Dharmar 1 used copper slag and fly ash to improve the flexural capacity of concrete. Prakash et al 2 used steel fiber, fly ash, and coconut shell elements in concrete to develop an eco‐friendly concrete. On the other hand, Nazarpour and Jamali 3 studied the mechanical and freezing cycle properties of concrete, which used recycled aggregates.…”

Section: Introductionmentioning

confidence: 99%

Effect of super absorbent polymer on microstructural and mechanical properties of concrete blends using granite pulver

Laila

Ananthi

Roy

et al. 2020

Industrialization and urbanization has caused a serious impact on the environment due to the vast consumption of energy and eco‐unsustainable production. Therefore, scientists and engineers are placing more effort to design environmentally sustainable systems. To achieve sustainability, one potential solution is to use renewable resources to produce construction materials. The effect on various amounts of admixed super absorbent polymer (SAP) on microstructural, fresh and hardened properties of autogenous cured concrete incorporating Granite Pulver (GP) have been investigated. For this purpose, a small quantity of Portland cement was replaced by GP as 5, 10, 15, and 20%. The SAP was used at volume fractions of 0.1 to 1% to the GP‐concrete blends to counteract self‐desiccation during the hydration of concrete. Along with the GP, fly ash (FA) was also added as filler to improve the workability of GP‐concrete blends. The chemical and microstructural properties of unprocessed GP, fly ash, and cement samples along with the mechanical properties of GP‐concrete blends were investigated through different tests. A total of 627 specimens were prepared for mechanical testing of GP‐concrete blends. The GP along with the SAP increases the compressive strength and flexural strength in comparison with the control mixture by around 1.6 and 6.8% respectively, when a replacement of cement by GP up to 15% was made with an addition of 0.4% of SAP in the mixture.