Estimation of the cementitious properties of various industrial by-products for applications requiring low mechanical strength

Peyronnard, Olivier; Benzaazoua, Mostafa

doi:10.1016/j.resconrec.2011.08.008

Cited by 42 publications

(15 citation statements)

References 51 publications

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“…2), with temperatures of 500-900°C and retention times of 2-5 h. As a result of the foregoing, the chemical composition of activated paper sludge (APS) varies, as shown in Table 3. The majority silica, alumina and calcium oxide content may range from 11-44%, 8-29% and 4-54%, respectively [15,18,40,[55][56][57][58][59][60][61][62][63][64][65][66]. This variability of oxides in paper sludge wastes is directly related to the limestone/kaolinite ratio and the percentage of recycled paper used as raw material in the process.…”

Section: Activation and Mineralogical Modificationsmentioning

confidence: 99%

Paper sludge, an environmentally sound alternative source of MK-based cementitious materials. A review

Frías

Rodríguez

Rojas

2015

Construction and Building Materials

111

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Section: Activation and Mineralogical Modificationsmentioning

confidence: 99%

Paper sludge, an environmentally sound alternative source of MK-based cementitious materials. A review

Frías

Rodríguez

Rojas

2015

Construction and Building Materials

111

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“…GGBS presents primarily cementitious behaviour (latent hydraulic activity) but it may also show some minimal pozzolanic features (reaction with CH) [6][7][8]. Reactivity of GGBS requires, however, an alkaline activator to raise pH in the vicinity of the slag.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of internal curing by superabsorbent polymers (SAP) in PC-GGBS mortars

Almeida

Klemm

2018

Cement and Concrete Composites

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This paper evaluates the effect of superabsorbent polymers (SAP) on hydration and microstructure of PC-GGBS mortars. Development of autogenous shrinkage, microstructural characteristics (MIP/SEM) and compressive strength were analysed during the first 90 days. Four levels of Portland cement (PC) replacement by GGBS (0%, 25%, 50% and 75%) and two types of SAP with different water absorption capacities were considered. The results proved the efficiency of internal curing by SAPs in PC-GGBS systems due to significant reduction in autogenous shrinkage, especially for higher contents of GGBS. SAP facilitates GGBS hydration activated by portlandite; its products can be deposited into the nano pores leading to a small relative expansion of the hardened bulk volume. This process is initiated during the second week and it lasts until the sixth week. Despite increased total porosity, compressive strength of SAPs modified mortars is comparable to the reference samples for low GGBS contents in advanced ages.

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“…Slags from extracting metal processes are conventionally considered as waste materials (Nazari and Sanjayan, 2015). In construction, copper slag (CS) is used in fillings, embankments, drainage, ballast, as aggregates in mortars, concrete (Thomas and Gupta, 2013;Mithun and Narasimhan, 2015) and asphalt mixtures (Hassan and Al-Jabri, 2011), as abrasive material (Kambham et al, 2007), as a cement substitute (Shi and Qian, 2000;Moura and Coutinho, 2004;Zain et al, 2004;Al-Jabri et al, 2006;Moura et al, 2007;Taha et al, 2007;Sánchez de Rojas et al, 2008;Brindha et al, 2010;Chew and Bharati, 2010;Brindha and Nagan, 2011;Najimi et al, 2011;Peyronnard and Benzaazoua, 2011), as raw material in the manufacture of Portland cement (PC) (Ariño and Mobasher, 1999;Chockalingam et al, 2013;García Medina et al, 2006;Gorai et al, 2003;Kosmatka et al, 2003) and also as binders in the manufacture of alkali-activated (AA) cements Malolepszy, 1989, 1994;Shi et al, 2008;Iacobescu et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Use of ancient copper slags in Portland cement and alkali activated cement matrices

Nazer

Payá

Borrachero

et al. 2016

Journal of Environmental Management

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Some Chilean copper slag dumps from the nineteenth century still remain, without a proposed use that encourages recycling and reduces environmental impact. In this paper, the copper slag abandoned in landfills is proposed as a new building material. The slags studied were taken from Playa Negra and Púquios dumps, both located in the region of Atacama in northern Chile. Pozzolanic activity in lime and Portland cement systems, as well as the alkali activation in pastes with copper slag cured at different temperatures, was studied. The reactivity of the slag was measured using thermogravimetric analysis (TGA), scanning electron microscopy (SEM), X-ray diffraction (XRD), electrical conductivity and pH in aqueous suspension and Fourier Transform Infrared Spectroscopy (FTIR). Furthermore, copper slag-Portland cement mortars with the substitution of 25% (by weight) of cement by copper slag and alkali-activated slag mortars cured at 20 and 65 °C were made, to determine the compressive strength. The results indicate that the ancient copper slags studied have interesting binding properties for the construction sector.

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Estimation of the cementitious properties of various industrial by-products for applications requiring low mechanical strength

Cited by 42 publications

References 51 publications

Paper sludge, an environmentally sound alternative source of MK-based cementitious materials. A review

Paper sludge, an environmentally sound alternative source of MK-based cementitious materials. A review

Efficiency of internal curing by superabsorbent polymers (SAP) in PC-GGBS mortars

Use of ancient copper slags in Portland cement and alkali activated cement matrices

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