Effects of ultra fine slag as mineral admixture on the compressive strength, water absorption and permeability of rice husk ash based geopolymer concrete

Jindal, Bharat Bhushan; Jangra, Parveen; Garg, Atul

doi:10.1016/j.matpr.2020.04.219

Cited by 46 publications

(15 citation statements)

References 23 publications

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“…The range of specific gravity and specific surface area of the UFS is found to be 2.19 to 2.7 and 1.2 m 2 /gm and above, respectively. Calcium oxide and alumina content are in higher proportion in UFS, which would help in the formation of calcium-based supplemental hydration products in the binder matrix [69]. Figure 12 shows the SEM image of the ultra-fine slag giving smooth spherical particle shape and indicated the presence of crystalline phase, calcite from the XRD.…”

Section: Ultra-fine Slagmentioning

confidence: 99%

“…When compared to other replacements of UFS, the 20% replacement had a greater strength, due to the high CaO level in UFS, Fig. 13 Chemical composition of UFS [69][70][71][72][73][74] Table 1 Compressive strength of concrete containing USF [75] Compressive strength in N/mm 2 providing both pozzolanic and hydraulic reactivity, resulting in a denser pore structure and higher strength. As compared to control concrete mix, all UFS mixes demonstrated early-age strength and the ultimate strength of all the UFS concrete mixes were higher than that of PPC concrete.…”

Section: Ultra-fine Slagmentioning

confidence: 99%

“…With the addition of UFS and greater RHA, the compressive strength of RHA geopolymer concrete is enhanced. RHA geopolymer concrete may also achieve a much greater compressive strength of 50 MPa at 28 days when RHA content of 400 kg/m 3 is combined with 10% UFS [69]. While at 28 days and 90 days, the compressive strength of concrete prepared using UFS containing 20% FA activated with 4% sodium oxide equivalent (Na 2 O-E) of sodium sulphate (NS) reached up to 41.5 MPa and 60.8 MPa, respectively, as shown in Fig.…”

Section: Ultra-fine Slagmentioning

confidence: 99%

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Agro-industrial-based wastes as supplementary cementitious or alkali-activated binder material: a comprehensive review

Blesson

Rao

2023

Innov. Infrastruct. Solut.

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An attempt to shed light on the use of agro-industrial-based wastes as supplementary cementitious material (SCM) or as alkali-activated binder (AAB) material is mainly focused in this review paper. The SCM or AAB acts as a suitable replacement for cement, as the cement manufacturing tends to contribute to 8–10% of global CO2 emissions. To gain acceptability in the construction industry, diverse agro-industrial-based wastes must demonstrate their potential as precursors in AAB or as SCM. The binder materials discussed among the agricultural wastes are rice husk ash, olive waste ash, and coconut-based waste ash, and the industrial wastes are ground granulated blast furnace slag, fly ash, and ultra-fine steel slag. The paper also analyses the effects of calcined and uncalcined agro-industrial-based wastes on pozzolanic properties of binder system. It is clear from the studies that the calcined wastes tend to provide greater reactivity compared to the uncalcined wastes, that helps in early strength development in the binder system. The review findings indicate that the agro-industrial-based wastes provide pozzolanic and hydraulic properties, thereby making them suitable as an AAB or as a SCM.

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Section: Ultra-fine Slagmentioning

confidence: 99%

Section: Ultra-fine Slagmentioning

confidence: 99%

Section: Ultra-fine Slagmentioning

confidence: 99%

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Agro-industrial-based wastes as supplementary cementitious or alkali-activated binder material: a comprehensive review

Blesson

Rao

2023

Innov. Infrastruct. Solut.

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“…Compared with ordinary Portland cement, the production of geopolymer can not only fully utilize industrial solid waste as raw materials, but also directly react at room temperature, so the use of geopolymer can reduce 73% of greenhouse-gas emission and 43% of energy consumption [ 8 ]. Many scholars try to improve the environment by studying geopolymer concrete (GC) instead of ordinary concrete [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Axial Compressive Performance of Polyvinyl Alcohol Fibers Reinforced Fly Ash—Slag Geopolymer Composites

et al. 2021

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Geopolymer concrete (GC) has been gaining attention in research and engineering circles; however, it is a brittle material with poor tensile performance and crack resistance. To address these problems, we introduced fibers into GC. In this study, axial compression and scanning electron microscope (SEM) tests were carried out on polyvinyl alcohol (PVA) short fiber reinforced low-calcium fly ash-slag-based geopolymer concrete (PFRGC). The ratio of PVA short fibers and low-calcium fly ash on the compression behavior of fiber reinforced geopolymer concrete (FRGC) were investigated and discussed. The test results show that PVA fibers play a bridging role in the cracks of the specimen and bear the load together with the matrix, so the addition of PVA fibers delayed the crack propagation of GC under axial compression. However, with the increase of low-calcium fly ash/PVA fibers, the number of unreacted fly ash particles in PFRGCs increases. Too many unreacted fly ash particles make GC more prone to micro-cracks during loading, adversely affecting compressive properties. Therefore, the axial compressive strength, elastic modulus, and Poisson’s ratio of GC decrease with the increasing low-calcium fly ash/PVA fibers.

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“…They reported that the addition of ultra-fine slag enhances the durability properties. [9] The investigating parameters such as permeability, diffusivity, and rate of water absorption behavior are vital for the durability of concrete [10]. Sorptivity, the rate of water absorption, is a rapid and simple test that can indicate the transport properties of cover concrete and its tendency to absorb and transmit water by capillarity [11].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Rate of Absorption of Water of Basalt, Polypropylene, and Steel Fibers Reinforced Concrete

Haruna

2021

CEJ

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Good durability of concrete is an essential part of the design process, and tests to determine sustainability have been developed for both laboratory and site use. The main feature of durable concrete is low water absorption. Almost all forms of deterioration in reinforced concrete involve deleterious fluid ingress through the concretes pore structure. In wet concrete, the water ingress rate or other liquids is mostly controlled by absorption due to capillary rise. This study examines the effect of basalt, polypropylene, and steel fiber in different volume fractions at 0.3%, 0.6%, and 0.9% for absorption tests. A total of 8 specimens for different fiber were examined based on the rate of water absorption test recommended by ASTM C1585-04. A result obtained has been analyzed and compared with the control specimen. A relationship between absorption rate and the square root of time for both concrete mixtures was represented graphically and linearly. Result data showed a precise decrease in absorption due to incorporating both types of fiber. Also, from the result data, basalt and polypropylene showed greater uptake than steel fiber and enhances mass transport of water into concrete specimens. However, steel fiber addition showed high resistance to absorption rater than the control specimen and other fiber.

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Effects of ultra fine slag as mineral admixture on the compressive strength, water absorption and permeability of rice husk ash based geopolymer concrete

Cited by 46 publications

References 23 publications

Agro-industrial-based wastes as supplementary cementitious or alkali-activated binder material: a comprehensive review

Agro-industrial-based wastes as supplementary cementitious or alkali-activated binder material: a comprehensive review

Experimental Study on Axial Compressive Performance of Polyvinyl Alcohol Fibers Reinforced Fly Ash—Slag Geopolymer Composites

Experimental Study on the Rate of Absorption of Water of Basalt, Polypropylene, and Steel Fibers Reinforced Concrete

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