Characterization of lightweight aggregates manufactured from washing aggregate sludge and fly ash

González-Corrochano, Beatríz; Alonso-Azcárate, Jacinto; Rodas, M.

doi:10.1016/j.resconrec.2009.04.008

Cited by 103 publications

(59 citation statements)

References 34 publications

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“…15 and ( ) relative c represents the volume ratio between bulk material and matrix material within the cylinder and is calculated in the same way as the relative density, relative , in Eq. 1: ( ) bulk relative c matrix (19) Where bulk is the bulk density and matrix is the matrix density. Eq.…”

Section: Calculations To Describe the Relation Between Solid Strengthmentioning

confidence: 99%

Mechanical properties of lightweight aggregates

Bernhardt

Tellesbø²,

Justnes

et al. 2013

Journal of the European Ceramic Society

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Lightweight aggregates (LWA) were successfully produced both in a pilot-scale rotary kiln and in a laboratory chamber furnace. The mechanical properties of LWA were investigated in detail applying the European standard crushing resistance test (CR-test) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 2 stresses in the centre of the pellet and the strength was observed to increase exponentially with decreasing sample size. The relationship between the CR-and spc-test has been established facilitating "translation" of strength data between the two different test methods.

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Section: Calculations To Describe the Relation Between Solid Strengthmentioning

confidence: 99%

Mechanical properties of lightweight aggregates

Bernhardt

Tellesbø²,

Justnes

et al. 2013

Journal of the European Ceramic Society

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“…Different types of raw materials of natural and artificial origin are used for the production of lightweight aggregates (LWA) [1][2][3][4][5]. The chemical composition of the raw material determines the bloating (expansion) behaviour and the properties of the product [6].…”

Section: Introductionmentioning

confidence: 99%

The effect of additives on the properties of lightweight aggregates produced from clay

Bernhardt

Justnes

Tellesbø³

et al. 2014

Cement and Concrete Composites

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In an attempt to improve the properties, lightweight aggregates were produced from clay with the addition of Na 2 CO 3 , SiO 2 , Fe 2 O 3 , and Fe in quantities between 2 and 10 wt% and examined with respect to strength, density and expansion behaviour. The additives were mixed into dry clay powder, water was added and pellets were formed by hand and fired at 1120°C in a chamber furnace. Particle densities of the products ranged from 0.31-0.57 g/cm 3 , porosities from 78-89% and the solid strength from 0,54-1,58 MPa. The addition of Na 2 CO 3 proved to decrease the viscosity of the glass phase at the surface of the pellets but resulted in a 2 reduced expansion, irregular shape and pellets sticking together. SiO 2 addition did not give any major change in properties. The addition of Fe 2 O 3 increased the pore size in the centre of the pellets, however with insignificant change in strength and density. Adding 5 wt% metallic iron powder led to LWA pellets with increased porosity, reduced density, larger pores and low mechanical strength and could be an useful additive in applications where low density is more important than strength.

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“…Arti ficial LW As can be formed by rapid heating at high temperatures of materials that have the ability to expand. Their origin can be: (i) nat ural sources such as volcanic rocks [2,3] and/or sedimentary rocks [4] and (ii) thermal treatment of waste materials and/or industrial by-products, such as mining wastes [5,6] and fly ash [7][8][9].…”

Section: Introductionmentioning

confidence: 99%