Chemical stability of cementitious materials based on metakaolin

Palomo, A.; Blanco-Varela, María Teresa; Granizo, M. L.; Puertas, Francisca; Vázquez, T.; Grutzeck, Michael W.

doi:10.1016/s0008-8846(99)00074-5

Cited by 560 publications

(298 citation statements)

References 5 publications

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“… The absorption bands at approximately 1650 and 3450 cm -1 are due to the stretching vibrations and deformation vibrations of OH and H-O-H groups from water molecules [60].…”

Section: Mass Lossmentioning

confidence: 99%

Resistance of geopolymer and Portland cement based systems to silage effluent attack

Aiken

Sha

Kwasny

et al. 2017

Cement and Concrete Research

108

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Abstract:Traditional Portland cement (PC) concrete has been used for many years in the agricultural industry for the construction of silos and silage effluent storage facilities. However, the acidic nature of the silage effluent produced by silage has led to severe degradation of PC concrete which in turn has significant environmental and financial implications. This study compares the resistance of PC and geopolymer (GP) mortars and pastes to silage effluent over 12 months. The GP samples displayed increased resistance to silage effluent in terms of mass and strength loss. Analysis of microstructure suggests that the increased stability of the reaction products is the main factor behind increased silage effluent resistance when compared with PC. It was also found that pulverised fuel ash (PFA) and ground granulated blast furnace slag (GGBS) blends with a higher PFA content may offer increased long term silage effluent resistance due to the nature of the main binder gel produced in PFA dominant systems.

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“… The absorption bands at approximately 1650 and 3450 cm -1 are due to the stretching vibrations and deformation vibrations of OH and H-O-H groups from water molecules [60].…”

Section: Mass Lossmentioning

confidence: 99%

Resistance of geopolymer and Portland cement based systems to silage effluent attack

Aiken

Sha

Kwasny

et al. 2017

Cement and Concrete Research

108

View full text Add to dashboard Cite

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“…Alkaline activation of raw material composition with the concentrated NaOH solutions produced an amorphous material-a zeolitic precursor with excellent cementing properties in terms of mechanical strength (Palomo, 1999). The rate of chemical reactions was influenced by various parameters such as curing temperature, alkali concentration, initial solids content, etc.…”

Section: Introductionmentioning

confidence: 99%

Influence of the carbonate-free clay calcination temperature and curing conditions on the properties of alkali-activated mortar

Būmanis

Bajāre

Korjakins

2014

Proceedings of the International Conference „Innovative Materials, Structures and Technologies”

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Abstract. Alkali-activated materials (AAMs) are one of the most perspective alternatives to the traditional Portland cement based materials. AAMs could reduce the environmental pollution and greenhouse gas emission due to the lower heat consumption in production (up to 80% compared to the ordinary Portland cement). In the current research alkaliactivated mortar was developed from the locally available low-carbonate Illite clay. Experimental work consisted of Illite clay calcination at different temperatures and regimes (from 500-800°C) and incorporation of the obtained material into the mixture of alkali-activated mortar. Four curing regimes were applied to alkali-activated mortar. The results indicate that hardened mortar properties are mainly affected by curing temperature and regime and the compressive strength up to 28.8MPa could be achieved for the mortar samples aged 2 months.

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“…In the region of 775-650 cm -1 , the bands are due to symmetrical vibrations of tetrahedral groups (TO 4 ). The band at 558 cm -1 is correspond to double-ring linkage [15]. The peak at ~460 cm -1 is assigned to in-plane bending of Al-O and Si-O linkages [13].…”

Section: Resultsmentioning

confidence: 99%

The Effect of Curing Conditions on the Properties of Geopolymer Samples

Arioz¹,

Arıöz²,

Koçkar³

2013

IJCEA

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Abstract-Geopolymers or inorganic polymers are getting increasing attention due to being environmentally friendly and having great potential for applications in various industries. Geopolymers have three dimensional amorphous structure and can be synthesized from by products such as fly ash, blast furnace slag or geological materials such as kaolinite.In this experimental study F class fly ash was used as a raw material and geopolymer samples were synthesized by means of sodium silicate and 8 M sodium hydroxide solutions. These samples were cured at 80°C for three different durations (6h, 15h and 24h). Compressive strength tests were carried out at 7 and 28 days. The maximum compressive strength was found to be 40.35 MPa. The compressive strength values indicated that the curing conditions influenced the physical properties of geopolymer samples. As the curing duration increased, the compressive strengths increased.XRD and FTIR techniques were used to characterize the fly-ash based geopolymers. In FTIR spectra it has seen that geopolymerisation has been achieved successfully. The major fingerprint for the geopolymer has obtained. It was also observed that there was no significant effect of curing conditions on the microstructure of the samples. FTIR and XRD spectrums were nearly the same with increasing duration.

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Chemical stability of cementitious materials based on metakaolin

Cited by 560 publications

References 5 publications

Resistance of geopolymer and Portland cement based systems to silage effluent attack

Resistance of geopolymer and Portland cement based systems to silage effluent attack

Influence of the carbonate-free clay calcination temperature and curing conditions on the properties of alkali-activated mortar

The Effect of Curing Conditions on the Properties of Geopolymer Samples

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