An experimental investigation on the mechanical characteristics of Steel Fibre Reinforced Alkali Activated Concrete incorporating industrial and agro wastes

Ganta, Mounika; Jyosyula, Sri Kalyana Rama; Baskar, Ramesh

doi:10.1007/s41062-024-01457-x

Cited by 3 publications

(1 citation statement)

References 55 publications

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“…Alkali activated concrete (AAC) is a novel green cementitious material made by utilizing natural silicoaluminate minerals or industrial solid waste rich in silicoaluminates as precursors and alkaline activators. [1][2][3] AAC boasts low carbon emissions, minimal pollution, excellent mechanical properties and durability, making it a highly suitable and promising alternative to traditional cement. [4][5][6] Research on AAC has primarily focused on mechanical properties in conventional environments, neglecting the impact of harsh natural conditions during the service life of structures.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on mechanical properties of alkali activated concrete after freeze–thaw cycles

Wang,

Chen,

Tang

et al. 2024

AIP Advances

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In order to study the frost resistance of alkali activated concrete (AAC), 15 AAC cube specimens and 15 cylindrical specimens were designed and manufactured. The frost thawing cycle test and mechanical performance test were used to study the frost resistance of AAC. The results showed that after freeze–thaw cycles, small pores appeared on the surface of the specimen, and the surface roughness increased, resulting in a darker appearance. As the number of freeze–thaw cycles increases, the highest mass loss rate of AAC reaches 1.88%. The cube compressive strength and axial compressive strength of AAC first increase and then decrease, while the elastic modulus gradually decreases. After 50 freeze–thaw cycles, the compressive strength of the specimen was greater than that of the normal temperature specimen. When the freeze–thaw cycles reached 200, the elastic modulus of the specimen degraded by 9.7%, the compressive strength decreased by 18.6%, and the axial compressive strength decreased by 31.2%. Based on the experimental results, a method for calculating the residual strength of AAC after freeze–thaw cycles and key parameters of the freeze–thaw damage constitutive equation were proposed.

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Section: Introductionmentioning

confidence: 99%

Experimental study on mechanical properties of alkali activated concrete after freeze–thaw cycles

Wang,

Chen,

Tang

et al. 2024

AIP Advances

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Properties of alkali activated cellular lightweight binder blocks with industrial and agro waste

Ganta,

Jyosyula,

Baskar

2024

Discov Appl Sci

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The construction industry is continuously seeking sustainable alternatives to conventional building materials. Alkali-Activated Cellular Lightweight Binder Blocks (AACLBs) present a promising solution by utilizing alkali activation technology to augment the properties of lightweight concrete. This research focuses on optimizing the composition of AACLBs by replacing conventional binders with alkali-activated materials derived from industrial by-products and agro waste with the help of a protein based foaming agent (FA). The industrial waste materials investigated include Fly Ash (F) and Blast Furnace Slag (BFS) while agro waste such as Rice Husk Ash (RHA) are considered as sustainable alternatives. With Sodium Hydroxide (NaOH) and Sodium Silicate (Na2SiO3) as activators, 8 different combinations are adopted in this study. Properties such as density and compressive strength (CS) are analyzed to assess the structural capabilities of the AACLBs and are compared with that of cement-based blends. The alkaline solution to binder ratio is kept constant as 2.5 for two dilution ratios (1:30 & 1:60) and ambient curing is adopted. The target densities for conventional cement-based mixes are set as 1200–1600 kg/m3 and 1500–1800 kg/m3 for alkali-based mixes. The findings show that, the highest CS of 42.76 MPa and a density of 1870 kg/m3 is observed for FB1 combination at a dilution ratio of 1:30. Conversely, the FBR2 combination at a dilution ratio of 1:60 yielded a CS of 21.23 MPa, accompanied by a minimum density of 988 kg/m3.

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Evaluation of Mechanical Characteristics of concrete incorporating Fly Ash and Rice Husk Ash as sustainable alternatives

Mounika,

Priyanka,

Rajasri

et al. 2024

E3S Web of Conf.

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The incorporation of industrial and agro waste materials in concrete production has gained significant attention in recent years due to their potential to enhance sustainability and reduce environmental impact. This study presents an evaluation of the mechanical properties of M25 grade concrete combined with Fly Ash (FA) and Rice Husk Ash (RHA) as sustainable alternatives to conventional cement. The experimental investigation focuses on a fixed 2.5% substitution of FA while varying the replacement level of cement with RHA from 0% to 2.5% at a constant water/cement ratio of 0.45. The mechanical properties assessed include compressive, tensile, flexural strengths, and workability characteristics at the age of 7 and 28 days. The experimental results show a highest compressive strength of 47.55 MPa and split tensile strength of 3.04 MPa at 1.5% dosage of RHA, and a peak flexural strength of 11.08 MPa at 2.5% substitution of RHA at 28 days. UPVT results indicate that the quality of concrete is enhanced with the improved substitution of RHA.

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An experimental investigation on the mechanical characteristics of Steel Fibre Reinforced Alkali Activated Concrete incorporating industrial and agro wastes

Cited by 3 publications

References 55 publications

Experimental study on mechanical properties of alkali activated concrete after freeze–thaw cycles

Experimental study on mechanical properties of alkali activated concrete after freeze–thaw cycles

Properties of alkali activated cellular lightweight binder blocks with industrial and agro waste

Evaluation of Mechanical Characteristics of concrete incorporating Fly Ash and Rice Husk Ash as sustainable alternatives

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