Sustainable use of industrial-waste as partial replacement of fine aggregate for preparation of concrete – A review

Dash, Manoj Kumar; Patro, Sanjaya Kumar; Rath, Ashoke Kumar

doi:10.1016/j.ijsbe.2016.04.006

Cited by 211 publications

(75 citation statements)

References 42 publications

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“…The diffraction patterns compare the mineralogy of each waste casting sand against its corresponding raw/virgin sand. In all cases, it was observed that, quartz (SiO2) remains the major mineral within waste casting sand as earlier mentioned by (Dash et al, 2016) [14]. It's most important diffractions were those corresponding to 2 theta equal to 21.58, 26.0758, 36.7657, 40.5272, 41.9851, 46.0425, 50.83, 60.51, 68.72, and 81.7187.…”

Section: Resultssupporting

confidence: 61%

Waste Foundry sand Mineralogical Characterisation: The Impact of Cast Alloy, Casting Temperature and Molding Additive on the Nature Waste Foundry Sand

Nyembwe¹,

Makhatha²,

Mageza³

2017

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Abstract. The metal casting industry discharges huge volumes of waste foundry sand yearly. It was estimated to be 250 thousand tons of spent silica foundry sand for the existing 200 casting facilities in South Africa. Even though, establish documents exist in regards to the foundry sand composition, few well documented theories are available in regards to changes or mutations taking place after casting process. Four waste silica casting sands were qualitatively analyzed for they mineralogical phases composition using the X-ray diffraction (XRD). The investigation was conducted on various waste casting sand alloy including aluminum, cast iron, high chrome and steel. The result revealed a significant compositional difference related to the molding binder and casting temperature. Different silica phase's polymorph, related to the various alloy casting temperature, were observed in waste sand samples. Theses phases included alpha quartz, tridymite, and alpha cristobelite. The molding binder favored the crystalisation of bentonite related mineral such as periclase, microcline and wustite, within the greensand system. The chemically bonded sand exposed the presence of anorthite as the only existing mineralized phase in the resin sand. The mineralogical content of the waste foundry sand provides information on the molding binder used. In addition to that, silica polymorph it informs about the pouring temperature related to the cast alloy.

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Section: Resultssupporting

confidence: 61%

Waste Foundry sand Mineralogical Characterisation: The Impact of Cast Alloy, Casting Temperature and Molding Additive on the Nature Waste Foundry Sand

Nyembwe¹,

Makhatha²,

Mageza³

2017

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“…The effects are pronounced for those mixtures utilizing the reactive siliceous aggregate. This may be attributed to the additional silica content coming from the foundry sand waste [22].…”

Section: Alkali Silica Reactivitymentioning

confidence: 99%

Investigation into the Heat of Hydration and Alkali Silica Reactivity of Sustainable Ultrahigh Strength Concrete with Foundry Sand

Aguayo

Torres

Talamini

et al. 2017

Advances in Materials Science and Engineering

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This study presents the hydration reactivity and alkali silica reaction (ASR) of ultrahigh strength concrete (UHSC) that has been made more sustainable by using spent foundry sand. Spent foundry sand not only is sustainable but has supplementary cementitious material (SCM) characteristics. Two series of UHSC mixtures were prepared using a nonreactive and reactive sand (in terms of ASR) to investigate both the impact of a more reactive aggregate and the use of spent foundry sand. Conduction calorimetry was used to monitor the heat of hydration maintained under isothermal conditions, while ASR was investigated using the accelerated mortar bar test (AMBT). Additionally, the compressive strengths were measured for both series of mixtures at 7, 14, and 28 days to confirm high strength requirements. The compressive strengths ranged from 85 MPa (12,345 psi) to 181.78 MPa (26,365 psi). This result demonstrates that a UHSC mixture was produced. The calorimetry results revealed a slight acceleration in the heat of hydration flow curve compared to the control from both aggregates indicating increased hydration reactivity from the addition of foundry waste. The combination of foundry sand and reactive sand was found to increase ASR reactivity with increasing additions of foundry sand up to 30% replacement.

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“…Production of ordinary Portland cement (OPC) as the most common cement used in concrete and mortar is accountable for contribution of 5%-7% of total global CO 2 emission. 2, 18 Moreover, the exothermic reaction of converting di-calcium silicate into tri-calcium silicate when slag is exposed to high temperature provides extra heat for clinker formation, thus making the process even more efficient. 2-4 To reduce the CO 2 emission from OPC production in mortars and cements, a large body of research has been conducted on the introduction of alternative sources of materials for clinker production with less overall CO 2 emission or on the substitution of OPC with other materials.…”

Section: Introductionmentioning

confidence: 99%

Vitrified and nonvitrified municipal solid wastes as ordinary Portland cement (OPC) and sand substitution in mortars

Sharifikolouei

Canonico²,

Salvo

et al. 2019

Int J Applied Ceramic Tech

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This work aims to evaluate the potential suitability of nonvitrified and vitrified bottom ashes to serve as substitute materials for both OPC and sand in mortars on an industrial scale. Three bottom ashes were selected as OPC substitutes: one was vitrified inside the incinerator plant (W1-C), one was carbonated under ambient conditions for 3 months (W2-C), and part of the carbonated bottom ash was further washed with Ca(OH)2 (W2-W-C). Composition and phases of the bottom ash sources were assessed by XRF and XRD, respectively. Thereafter, mortars were prepared by replacing 10, 20 or 30 wt% of OPC with these bottom ashes. It was shown that even though Ca(OH) 2 washing step (W2-W-C) led to an increment of the compressive strength in final mortars compared to the use of W2-C, it failed to reach the mechanical performance of OPC. On the contrary, the use of vitrified bottom ashes (W1-C) could lead to obtaining compressive strength comparable to that of standard mortar if added up to 10 wt%. Regarding the sand substitution, vitrified bottom ashes could reach suitable compressive strength when replacing 20 wt% of standard sand. The alkali aggregate reaction test confirmed the neutrality of substitution material added up to 50 wt%.

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Sustainable use of industrial-waste as partial replacement of fine aggregate for preparation of concrete – A review

Cited by 211 publications

References 42 publications

Waste Foundry sand Mineralogical Characterisation: The Impact of Cast Alloy, Casting Temperature and Molding Additive on the Nature Waste Foundry Sand

Waste Foundry sand Mineralogical Characterisation: The Impact of Cast Alloy, Casting Temperature and Molding Additive on the Nature Waste Foundry Sand

Investigation into the Heat of Hydration and Alkali Silica Reactivity of Sustainable Ultrahigh Strength Concrete with Foundry Sand

Vitrified and nonvitrified municipal solid wastes as ordinary Portland cement (OPC) and sand substitution in mortars

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