Production of geopolymeric binder from blended waste concrete powder and fly ash

Ahmari, Saeed; Ren, Xiaoyan; Toufigh, Vahab; Zhang, Lianyang

doi:10.1016/j.conbuildmat.2012.04.044

Cited by 300 publications

(98 citation statements)

References 48 publications

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“…This can be ascribed to the formation of a geopolymer gel created during dissolution of the FA glassy phase [28]. It is notable that the quartz and mullite peaks were still present but with reduced intensity, after NaOH activation.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 98%

New synthesis method for the production of coal fly ash-based foamed geopolymers

Böke

Birch

Nyale

et al. 2015

Construction and Building Materials

102

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Section: X-ray Diffraction (Xrd)mentioning

confidence: 98%

New synthesis method for the production of coal fly ash-based foamed geopolymers

Böke

Birch

Nyale

et al. 2015

Construction and Building Materials

102

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“…Increased water absorption with the increased pressure causes higher amounts of NaOH solution is squeezed out [17]. In such conditions, the geopolymerization reaction blocked so geopolymer gel formed slightly and then produce a high porosity of the geopolymer matrix.…”

Section: B Effect Of Si/al Ratio To Water Absorptionmentioning

confidence: 99%

The Effect of Si/Al Ratio to Compressive Strength and Water Absorption of Ferronickel Slag-based Geopolymer

Mustofa

Pintowantoro

2017

IJPS

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Abstract Geopolymer material is inorganic polymers that are generally synthesized from aluminosilicate materials, such as ferronickel slag. In this study, synthesis of geopolymer material using NaOH 7 molar and Na2SiO3 solutions with different Si/Al ratio to make paste. Paste is molded in a metal mold with dimensions of 5x5x5 cm 3 , then released from the mold and heated in an oven at 80 °C for 24 hours. The specimens that have been heated further left at room temperature for 28 days and then tested for compressive strengthand water absorption. The results indicate a trend compressive strength increases and water absorption decreases with increasing the Si/Al ratio. The optimum condition is obtained when Si/Al ratio is 3.5. Keywordsferronikelslag, inorganic polymer, aluminosilicate material.

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“…A Philips XL30 ESEM-TMP FEI scanning electron microscope was used for an identification of individual phases and their levels at 100× magnification. A scanning electron microscopy (SEM) was used in BSE (backscattered electrons) mode at a low pressure (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) and at an accelerating voltage of 30 kV. Figure 1 illustrates the heat evolution.…”

Section: Measurement Methodsmentioning

confidence: 99%

“…Ahmari et al [19] developed a geopolymer based binder using the RCP, together with fly ash. As a source of silicon and calcium, the RCP, at a maximum quantity of 50 wt%, contributes to a solid bond between the new aggregate and the binder, resulting in a greater compressive strength of the geopolymer, which is in the form of a poly-sialate-disiloxo, and therefore forms a stronger bond than a geopolymer created using fly ash alone.…”

Section: The Rcb As a Bindermentioning

confidence: 99%

Properties and Microstructure of Cement Paste Including Recycled Concrete Powder

Topič¹,

Prošek²

2017

Acta Polytech

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Abstract. The disposal and further recycling of concrete is being investigated worldwide, because the issue of complete recycling has not yet been fully resolved. A fundamental difficulty faced by researchers is the reuse of the recycled concrete fines which are very small (< 1 mm). Currently, full recycling of such waste fine fractions is highly energy intensive and resulting in production of CO 2 . Because of this, the only recycling methods that can be considered as sustainable and environmentally friendly are those which involve recycled concrete powder (RCP) in its raw form. This article investigates the performance of RCP with the grain size < 0.25 mm as a potential binder replacement, and also as a microfiller in cement-based composites. Here, the RCP properties are assessed, including how mechanical properties and the microstructure are influenced by increasing the amount of the RCP in a cement paste (≤ 25 wt%).

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Production of geopolymeric binder from blended waste concrete powder and fly ash

Cited by 300 publications

References 48 publications

New synthesis method for the production of coal fly ash-based foamed geopolymers

New synthesis method for the production of coal fly ash-based foamed geopolymers

The Effect of Si/Al Ratio to Compressive Strength and Water Absorption of Ferronickel Slag-based Geopolymer

Properties and Microstructure of Cement Paste Including Recycled Concrete Powder

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