Laboratory Evaluation of the Use of Cement-Treated Construction and Demolition Materials in Pavement Base and Subbase Applications

Mohammadinia, Alireza; Arulrajah, Arul; Sanjayan, Jay; Disfani, Mahdi M.; Bo, Myint Win; Darmawan, Stephen

doi:10.1061/(asce)mt.1943-5533.0001148

Cited by 176 publications

(35 citation statements)

References 24 publications

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“…Consequently, given their relatively poor initial engineering properties in some field situations, clays can benefit significantly from a well-designed soil improvement process (e.g., Horpibulsuk et al, 2003Horpibulsuk et al, , 2004Mohammadinia et al, 2014). Two commonly encountered clay minerals are montmorillonite and kaolinite, which can have low shear strengths, and which exhibit high swelling and low-to non-swelling behaviour, respectively (Horpibulsuk et al, 2011a(Horpibulsuk et al, , 2011b.…”

Section: Introductionmentioning

confidence: 99%

Strengthening montmorillonitic and kaolinitic clays using a calcium-based non-traditional additive: A micro-level study

Latifi

Meehan

Majid

et al. 2016

Applied Clay Science

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Section: Introductionmentioning

confidence: 99%

Strengthening montmorillonitic and kaolinitic clays using a calcium-based non-traditional additive: A micro-level study

Latifi

Meehan

Majid

et al. 2016

Applied Clay Science

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“…The XRD analysis was performed with a D/max-RB diffractometer using CuK a radiation (40 kV and 100 mA), at 4°/min ranging from10° to 70°. The main crystalline materials in the copper mine tailings were: quartz (SiO 2 ), albite (NaAlSi 3 O 8 ), Chlorite (Mg,Al) 6 (SiAl) 4 O 10 (OH) 8 and dolomite (CaMg(CO 3 ) 2 ) as shown in Figure 3. The Fourier transform infrared spectroscopy analysis was performed by Fourier Transform Infrared spectroscopy (Nicolet5DXC FT-IR) in the range of 400-4000 cm -1 .…”

Section: Methodsmentioning

confidence: 99%

“…So, cement production not only consumes a large amount of natural resources but also emits carbon dioxide, causing atmospheric pollution. The cement industry is responsible for 7% of the total emissions of carbon dioxide across the world [3][4][5]. China is the largest cement producer and consumer in the world, and facing air pollution [6].…”

Section: Introductionmentioning

confidence: 99%

Enhancement Experiment on Cementitious Activity of Copper Mine Tailings in Geopolymer System

Yu¹,

Zhang²,

Huang³

et al. 2017

Preprint

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Abstract:Copper mine tailings are the residual products after the purification of precious copper from copper ores, and their storage can create numerous environmental problems. Many researchers have used copper mine tailings for preparation of geopolymer. This paper studies the enhancement of the cementitious activity of copper mine tailings in geopolymer system. First, copper mine tailings are activated through a mechanical grinding activation. Afterward, the mechanically activated copper mine tailings are further processed through thermal activation and alkaline roasting activating. The cementitious activity index of copper mine tailings is characterized through the degree of concentration of alkali leaching silicon and aluminum. It was observed that the Si and Al alkali leaching concentration of mechanical activated tailings was increased by 26.03% and 93.33%, respectively. The concentration of Si and Al was increased by 54.19% and 119.92%, respectively. For alkaline roasting activating, roasting time, temperature and (C/N ratio) were evaluated through the orthogonal test, and the best condition was activation for 120 min at 600℃ with C/N ratio is 5:1. In this study, the SEM, XRD and IR analysis show that mechanically activation, thermal activation and alkaline roasting activating can improve the cementitious activity index of copper mine tailings.

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“…XRD analysis was performed with a D/max-RB diffractometer using CuK a radiation (40 kV and 100 mA), at 4 • /min ranging from 10 • to 70 • . The main crystalline materials in the copper mine tailings were quartz (SiO 2 ), albite (NaAlSi 3 O 8 ), Chlorite (Mg, Al) 6 (SiAl) 4 O 10 (OH) 8 and dolomite (CaMg(CO 3 ) 2 ) ( Figure 3). Fourier transform infra-red (FITR) spectroscopy analysis was performed by a FTIR system (Nicolet5DXC, Thermo Nicolet Corporation, Madison, WI, America) in the range of 400-4000 cm −1 .…”

Section: Methodsmentioning

confidence: 99%

“…Cement production not only consumes a large amount of natural resources but also emits carbon dioxide which causes atmospheric pollution. The cement industry is responsible for 7% of the total emissions of carbon dioxide across the world [3][4][5]. China is the largest cement producer and consumer across the world, and is also suffering from air pollution [6].…”

Section: Introductionmentioning

confidence: 99%

Enhancement Experiment on Cementitious Activity of Copper-Mine Tailings in a Geopolymer System

Zhang

Huang

et al. 2017

Fibers

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Abstract:Copper-mine tailings are the residual products after the extraction of precious copper metal from copper ores, and their storage can create numerous environmental problems. Many researchers have used copper-mine tailings for the preparation of geopolymers. This paper studies the enhancement of the cementitious activity of copper-mine tailings in geopolymer systems. First, copper-mine tailings are activated through mechanical grinding activation. Then, the mechanically activated copper-mine tailings are further processed through thermal activation and alkaline-roasting activation. The cementitious activity index of copper-mine tailings is characterized through the degree of leaching concentration of Si and Al. It was observed that the Si and Al leaching concentration of mechanically activated tailings was increased by 26.03% and 93.33%, respectively. The concentration of Si and Al was increased by 54.19% and 119.92%, respectively. For alkaline-roasting activation, roasting time, temperature and the mass ratio of copper-mine tailings to NaOH (C/N ratio) were evaluated through orthogonal tests, and the best condition for activation was 120 min at 600 • C with a C/N ratio of 5:1. In this study, scanning electron microscopy (SEM), X-ray diffraction (XRD) and infra-red (IR) analysis show that mechanical, thermal and alkaline-roasting activation could be used to improve the cementitious activity index of copper-mine tailings.

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Laboratory Evaluation of the Use of Cement-Treated Construction and Demolition Materials in Pavement Base and Subbase Applications

Cited by 176 publications

References 24 publications

Strengthening montmorillonitic and kaolinitic clays using a calcium-based non-traditional additive: A micro-level study

Strengthening montmorillonitic and kaolinitic clays using a calcium-based non-traditional additive: A micro-level study

Enhancement Experiment on Cementitious Activity of Copper Mine Tailings in Geopolymer System

Enhancement Experiment on Cementitious Activity of Copper-Mine Tailings in a Geopolymer System

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