Cementitious backfill with high sulfur content Physical, chemical, and mineralogical characterization

Benzaazoua, Mostafa; Ouellet, J.; Servant, Stéphane; Newman, P.W.G.; Verburg, Rens

doi:10.1016/s0008-8846(99)00023-x

Cited by 147 publications

(47 citation statements)

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“…stopes (Hassani, Archibald, 1998;Benzaazoua et al 1999). A few studies regarding the physico-chemical and mineralogical characteristics of CPB ingredients (i.e.…”

mentioning

confidence: 99%

One-Dimensional Consolidation Parameters Of Cemented Paste Backfills / Parametry Jednowymiarowej Konsolidacji Podsadzki W Postaci Cementowej Pasty

Yilmaz¹

2012

Gospodarka Surowcami Mineralnymi - Mineral Resources Management

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“…stopes (Hassani, Archibald, 1998;Benzaazoua et al 1999). A few studies regarding the physico-chemical and mineralogical characteristics of CPB ingredients (i.e.…”

mentioning

confidence: 99%

One-Dimensional Consolidation Parameters Of Cemented Paste Backfills / Parametry Jednowymiarowej Konsolidacji Podsadzki W Postaci Cementowej Pasty

Yilmaz¹

2012

Gospodarka Surowcami Mineralnymi - Mineral Resources Management

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“…Therefore, the utilization of mine tailings for backfilling underground voids is a better way of disposing of these solid wastes. The main benefits of the backfilling technology are as follows: (1) providing a structural support for mining areas, thus creating a safe working environment; (2) minimizing surface subsidence; and (3) reducing the costs of tailing disposal and rehabilitation [7][8][9]. Hence, underground backfilling leads to harmless ground conditions inside the mines and improves their operational safety.…”

Section: Introductionmentioning

confidence: 99%

Pore Structure Evolution and Its Effect on Strength Development of Sulfate-Containing Cemented Paste Backfill

2017

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Abstract:In this study, the effects of the initial sulfate content on the properties of cemented paste backfill (CPB) made from coarse tailings has been investigated via mercury intrusion porosimetry. The combined effects of the sulfate content and curing time on the total porosity, pore size distribution, and unconfined compressive strength of the produced material were discussed. It was found that the specimens with an initial sulfate content of 5000 and 35,000 ppm exhibited higher unconfined compressive strength, while the resulting fine porous structures characterized by pore radii of 10-400 and 1-10 µm significantly improved the mechanical properties of the CPB. In addition, an increase in the curing time decreased the overall pore volume in the radius range of 1-400 µm but increased the pore volume at pore radii less than 1 µm.

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“…The lead-zinc tailings are often rich in pyrite and contain toxic metals such as arsenic (As), cadmium (Cd), lead (Pb), zinc (Zn), and copper (Cu). The oxidation of pyrite in presence of water and oxygen generates acidity and facilitates the release of toxic metals contained in the tailings [4,5]. The finer the granularity of tailings is, the lower the water permeability is, the harder the drainage consolidation is, and the easier the spill of the storage tailings dam is [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Calcined Hard Kaolin Dosage on the Strength Development of CPB of Fine Tailings with Sulphide

Zheng

Guo

Zhao

2017

Advances in Materials Science and Engineering

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This study presents the effect of calcined hard kaolin (CHK) as replacement (15-50 wt.%) to Portland cement (PC) on the strength development of cemented paste backfill (CPB) of fine tailings containing sulphide. PC is used as binder at 20 wt.% dosage. The results show that CPB sample containing 30 wt.% CHK replacements produces the desired strength and durability (i.e., 26.1% increase in strength over the curing period between 28 d and 360 d). CPB without CHK does not produce the desired strength and durability (i.e., 32.8% losses in strength over the curing period between 90 d and 360 d). The quantity of expansive gypsum of CPB containing 30 wt.% CHK is obviously less than that of CPB without CHK. The porosity of the fine pore for pore diameter < 0.3 m is obviously higher in CPB containing 30 wt.% CHK than in CPB without CHK, regardless of curing time. It can be concluded that CHK can be suitably exploited for CPB of fine tailings with sulphide to improve the strength and stability in short and long terms.

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Cementitious backfill with high sulfur content Physical, chemical, and mineralogical characterization

Cited by 147 publications

References 1 publication

One-Dimensional Consolidation Parameters Of Cemented Paste Backfills / Parametry Jednowymiarowej Konsolidacji Podsadzki W Postaci Cementowej Pasty

One-Dimensional Consolidation Parameters Of Cemented Paste Backfills / Parametry Jednowymiarowej Konsolidacji Podsadzki W Postaci Cementowej Pasty

Pore Structure Evolution and Its Effect on Strength Development of Sulfate-Containing Cemented Paste Backfill

Effect of Calcined Hard Kaolin Dosage on the Strength Development of CPB of Fine Tailings with Sulphide

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