The Use of Industrial Wastes as Filler in Concrete/Mortar: A Critical Review

Odimegwu, Temple Chimuanya; Zakaria, Ideris; Abood, Manal Mohsen; Ibearugbulem, O. M.

doi:10.36478/jeasci.2018.5987.5996

Cited by 3 publications

(4 citation statements)

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“…On the other hand, the combined use of GCH with fibres increases the capillary water absorption of mortars, by about 15% in the case of RCF. Results obtained by capillary water absorption confirm those found by the mechanical tests, in fact, the addition of GCH [32], VCF and RCF alone [13] helps to refine the microstructure of mortars. On the contrary, the addition of GNP is useful to decrease the water absorption, since GNP (being hydrophobic) acts as a barrier for water ingress [18,35], even if it is slightly detrimental to the compressive strength.…”

Section: Capillary Water Absorptionsupporting

confidence: 79%

“…Mortars manufactured with both GNP and GCH register a total water absorption, that is, about 8% and 17% lower than that of REF, respectively. GCH mortar is also the one that absorbs the least compared to all other mortars, confirming that GCH increases the durability of mortars by filling the mortars' pores [32]. Also, the addition of fibres slightly reduces the water absorption of mortars, regardless of whether they are VCF or RCF.…”

Section: Capillary Water Absorptionmentioning

confidence: 60%

“…In order to maximise the fineness and ensure the best dispersion inside the mortar mixes, UFS and GCH were ground in a ball mill for 60 min and then sieved at 75 µm. It is reported that the smaller the filler particle size, probably the better the durability of the final material because better refinement of the pore structure can be attained [32].…”

Section: Methodsmentioning

confidence: 99%

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Gasification Char and Used Foundry Sand as Alternative Fillers to Graphene Nanoplatelets for Electrically Conductive Mortars with and without Virgin/Recycled Carbon Fibres

et al. 2020

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Structural health monitoring to assess the safety, durability and performance of structures can be performed by non-destructive methods such as the measurement of impedance in self-sensing cement-based elements. Cement-based materials, like mortars and concretes, generally have high electrical resistivity but the addition of carbon-based fillers and fibres decreases their electrical resistivity and thus enhances their self-sensing capabilities. In this study, two waste carbon-based fillers, namely, used foundry sand and gasification char were compared to commercial graphene nanoplatelets and used to produce self-sensing cement mortars, both with and without recycled or virgin carbon fibres. The mortars were tested in terms of their mechanical and electrical properties as well as their propensity to capillary water absorption. The results demonstrate that gasification char alone is the best carbonaceous waste for decreasing the electrical resistivity (−42%) and water absorption (−17%) of mortars, while their compressive strength remains unaltered. Moreover, although there is a slight reduction in compressive strength and an increase in water suction when gasification char is coupled with fibres, the combination of fillers and fibres has a synergistic effect in decreasing mortars’ electrical resistivity, especially when recycled carbon fibres are used (−80%).

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Section: Capillary Water Absorptionsupporting

confidence: 79%

Section: Capillary Water Absorptionmentioning

confidence: 60%

Section: Methodsmentioning

confidence: 99%

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Gasification Char and Used Foundry Sand as Alternative Fillers to Graphene Nanoplatelets for Electrically Conductive Mortars with and without Virgin/Recycled Carbon Fibres

et al. 2020

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“…Many different researchers investigated two types of by product waste: industrial and agricultural waste as a partial replacement of cement or aggregate (sand and gravel) in order to utilize in mortar and concrete. Several industrial by products were used as filler in concrete and mortar to investigate the filler effect of pozzolanic material which have added knowledge on filler effect in some cementations materials in terms of differentiating filler effect and pozzolanic effect 1,2 . Fillers are sourced naturally or processed from industrial and construction wastes.…”

Section: Introductionmentioning

confidence: 99%

The utilization of walnut shells as a partial replacement of sand in mortar mixes

Abdulwahid

Abdullah

2020

Structural Concrete

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The effect of walnut shells on different properties of mortar was investigated through several experimental tests. The investigated properties include dry density, thermal conductivity, compressive and flexural strengths. Percentage replacements of the walnut shells to sand ratio were 5, 10, and 15%. The walnut shells used in this study were treated by soaking in boiling water for two periods: 1/2 hr and 1 hr. All mortar mixes have same proportion of 1:3:0.7 by weight for cement, sand, and water, respectively. The test results showed that the use of 15% walnut shells treated for 1/2 hr lead to decrease of the density and thermal conductivity of mortar by 15 and 31%, respectively. On the contrary, the compressive and flexural strengths of mortar were decreased by 17 and 25%, respectively, in comparison to the control mortar after 28 days of moist curing. This study leads to a conclusion that by soaking the walnut shells in boiling water for 1/2 hr enhanced the behavior of mortar compared to the un‐soaked ones. This results in achieving an acceptable strength, good thermal insulator, and environmentally friendly mortar.

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Cement stone, modified by chemical water treatment sludge

Красиникова

Stepanov

Makarov

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Chemical treatment of municipal and industrial wastewater is becoming increasingly common in the world, resulting in sludge formation. But only a small fraction of the waste is disposed of. Therefore, the issue of the potential use of these wastes in making construction materials is vital. This paper examines the possible use of multi-tonnage industrial waste, in particular, sludge of chemical water treatment (SHVO) produced by combined heat and power plants in cement systems. Sludge of chemical water treatment is a pasty mass unstable in moisture. For this purpose it is advisable to pre-dry this waste until it becomes a fixed-mass, and then grind it. The impact of SHVO on the technological properties of cement paste and strength properties of cement stone was studied. The article shows that the introduction of SHVO into cement paste increases its water demand. The joint effect of naphthalene formaldehyde and polyester carboxylate-based sludge with additives was studied. Their efficiency depends on the way they are produced. The use of sludge with superplasticizers reduces binding agent consumption by 7.5% without loss of strength properties and reduces porosity of cement stone. It was established that the introduction of SHVO into cement systems changes the physiography of newgrowths.

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The Use of Industrial Wastes as Filler in Concrete/Mortar: A Critical Review

Cited by 3 publications

References 0 publications

Gasification Char and Used Foundry Sand as Alternative Fillers to Graphene Nanoplatelets for Electrically Conductive Mortars with and without Virgin/Recycled Carbon Fibres

Gasification Char and Used Foundry Sand as Alternative Fillers to Graphene Nanoplatelets for Electrically Conductive Mortars with and without Virgin/Recycled Carbon Fibres

The utilization of walnut shells as a partial replacement of sand in mortar mixes

Cement stone, modified by chemical water treatment sludge

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