Flexural behavior of fiber reinforced concrete incorporation with lathe steel scrap

Prasad, B. Pavan; Maanvit, P. Sai; Jagarapu, Durga Chaitanya Kumar; Eluru, Arunakanthi

doi:10.1016/j.matpr.2020.03.793

Cited by 16 publications

(15 citation statements)

References 4 publications

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“…This trend is consistent with the observations of other scientists, regardless of use as aggregate replacement [26][27][28]51] or as dispersed fibers [17,19,21,32]. Prasad et al [51] determined decreases in slump cone by 21%, 37% and 58% for steel waste up to 4.75 mm in length and up to 2 mm thick in the amount of 22%, 33% and 44% of the cement mass, respectively. The same results were obtained by Maanvit et al [26] for steel waste with length of 10-20 mm, thickness of 0.25 mm and in the same amount.…”

Section: Slump Conesupporting

confidence: 86%

“…The same trend was observed for lathe chips used as steel fibers [26,32,51]. Kumaran et al [31] reported 5%, 11% and 9% increase in compressive strength for concrete with fiber addition in amounts analogous to this study (7%, 10% and 13% of cement mass) compared to plain concrete.…”

Section: Compressive Strengthsupporting

confidence: 85%

“…Additions at 22%, 33% and 44% of cement weight were tested by Maanwit et al [26], who obtained 50%, 100% and 75% increases in flexural strength in relation to the reference sample. Similar increases (50%, 94% and 69%) were obtained by Prasad et al [51] for the same amounts of addition of lathe chips but at a greater size (as replacement for fine and coarse aggregate). Dharmaraj [33] studied concrete with the addition of fly ash and shredded scrap iron as steel fiber at 10%-25% of cement weight and obtained an increase in compressive strength of up to 3% for 15% scrap iron.…”

Section: Flexural Strengthsupporting

confidence: 84%

“…The same correlation was determined by Gawatre et al [32] for concrete with lathe chips added at 8%-42% of cement weight, but the maximum increase in compressive strength (11%) was obtained for an addition of 25% of cement weight. The increase in compressive strength and then decrease was also observed by Maanvit et al [26] and Prasad et al [51]. Dharmaraj [33] also obtained an increase in compressive strength up to 53% for 10% of shredded scrap iron addition, and then a decrease.…”

Section: Compressive Strengthsupporting

confidence: 76%

“…Maanvit et al [26] obtained increases in strength of 38%, 79% and 51% in relation to the reference sample for samples with addition of steel chips at 22%, 33% and 44% of cement weight respectively. Moreover, Prasad et al [51], for the same amounts of addition, but for a mix of steel and plastic chips, determined much lower increases in tensile split strength at 3%, 7% and 3%. The same correlation was observed by Mohammed et al [34] and Kumaran et al [31].…”

Section: Splitting Tensile Strengthmentioning

confidence: 93%

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Effect of Metal Lathe Waste Addition on the Mechanical and Thermal Properties of Concrete

et al. 2021

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The amount of steel chips generated by lathes and CNC machines is 1200 million tons per year, and they are difficult to recycle. The effect of adding steel chips without pre-cleaning (covered with production lubricants and cooling oils) on the properties of concrete was investigated. Steel waste was added as a replacement for fine aggregate in the amounts of 5%, 10% and 15% of the cement weight, which correspond with 1.1%, 2.2% and 3.3% mass of all ingredients and 0.33%, 0.66% and 0.99% volume of concrete mix, respectively. The slump cone, air content, pH value, density, compressive strength, tensile strength, tensile splitting strength, elastic modulus, Poisson’s ratio and thermal parameters were tested. It was observed that with the addition of lathe waste, the density decreased, but mechanical properties increased. With the addition of 5%, 10% and 15% metal chips, compressive strength increased by 13.9%, 20.8% and 36.3% respectively compared to plain concrete; flexural strength by 7.1%, 12.7% and 18.2%; and tensile splitting strength by 4.2%, 33.2% and 38.4%. Moreover, it was determined that with addition of steel chips, thermal diffusivity was reduced and specific heat capacity increased. With the addition of 15% metal chips, thermal diffusivity was 25.2% lower than in the reference sample, while specific heat was 23.0% higher. No effect was observed on thermal conductivity.

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