Advances in Civil Engineering / 2018 / Article / Tab 1

Research Article

Utilization of Electroplating Sludge as Subgrade Backfill Materials: Mechanical and Environmental Risk Evaluation

Table 1

Physical characteristics and chemical composition of sludge, fly ash, and cement.

SludgeCoal fly ashPortland cement

Physical characteristics
Moisture (%)70200.5
Density (g/cm3)1.052.93.18
pH4.810.3613
Specific gravity (g/cm3)2.652.343.13
Specific surface area (cm2/g)340034133550

Chemical composition (%)
Cu23.17
Fe2.122.952.34
Al0.4315.463.07
Ca25.293.5347.0
Si0.425.249.4
S1.160.691.08
Zn2.53-
Pb1.03-
Mg0.400.50
Cr2.5
Mn1.62
Rh23.22
V12.93
Sr2.6
Ti0.40
Na3.19
K0.42
Cl0.005

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