Influence of nucleation seeding on the performance of carbonated MgO formulations

Dũng, Nguyễn Tiến; Unluer, Cise

doi:10.1016/j.cemconcomp.2017.07.005

Cited by 60 publications

(38 citation statements)

References 29 publications

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“…50 hours). These findings were in line with the results reported by earlier studies [21,23], where the role of seeds in accelerating the hydration reaction in different systems was reported.…”

Section: Isothermal Calorimetrysupporting

confidence: 93%

Performance of MgO and MgO–SiO2 systems containing seeds under different curing conditions

Singh

Sonat

Yang

et al. 2020

Cement and Concrete Composites

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This study investigated the strength and microstructural development of MgO and MgO-microsilica (MS) systems under sealed and carbonated conditions. The influence of hydromagnesite seeds on the performance of each system was also evaluated. The hydration mechanisms were studied via isothermal calorimetry. A correlation between the strength development and formation of different phases was established. XRD, TG/DTG, FTIR and SEM were used for the identification and quantification of different hydrate and carbonate phases. MgO systems relied on the conversion of brucite into carbonate phases for their strength development, whereas M-S-H was the main source of strength in MgO-MS systems. The effect of seeding was evident in MgO-MS systems, where the extra space provided by the seeds increased the rate and degree of hydration. The formation of M-S-H was responsible for strength development and denser microstructures, which could be further improved via the increased utilization of unreacted MgO and MS.

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Section: Isothermal Calorimetrysupporting

confidence: 93%

Performance of MgO and MgO–SiO2 systems containing seeds under different curing conditions

Singh

Sonat

Yang

et al. 2020

Cement and Concrete Composites

Self Cite

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“…Previous studies [24][25][26] Fig. 9 shows the effect of 1% and 2% seed addition into the AAS mortar with and without the use of NC.…”

Section: Time-dependent Rheological Propertiesmentioning

confidence: 97%

“…The SEM image of hydromagnesite (Fig. 2(b)) demonstrated these seeds as spherical agglomerations with a diameter of ~1-7 µm, composed of ~0.5 µm diameter disks [24]. Fine aggregates with a maximum particle size of 1.18 mm was used in a saturated surface dry (SSD) condition to formulate the AAS mortars.…”

Section: Raw Materials and Sample Preparationmentioning

confidence: 99%

“…Furthermore, nucleation seeds (i.e. hydromagnesite) were also included to improve the rheological and mechanical properties of AAS [24,25]. Accordingly, previous research [26] has shown that the use of seeds can provide additional nucleation sites for the increased precipitation of hydrate phases, thereby enhancing the rate and degree of the hydration reaction.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the properties of alkali-activated slag mixes involving the use of nanoclay and nucleation seeds for 3D printing

Panda

Ruan

Unluer

et al. 2020

Composites Part B: Engineering

135

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This study investigated the properties of alkali activated slag (AAS) binders formulated for extrusion-based 3D printing. The fresh properties of AAS mixes were tailored through the use of nanoclay (NC) and nucleation seeds. The printability criteria employed were the ease of extrusion (extrudability) and the stability of the layered structure (buildability). Introduction of 0.4% NC in AAS mixes led to improved thixotropic properties due to the flocculation effect, which accounted for the extrudability and shape fidelity of the binder. Inclusion of 2% hydromagnesite seeds in this mix design provided additional nucleation sites for the increased precipitation of hydrate phases, resulting in denser microstructures. This enhanced the hydration reaction and improved the structural build-up rate necessary for large-scale 3D printing. The developed AAS mix containing 0.4% NC and 2% hydromagnesite seeds was used in the printing of an actual 3D structure to demonstrate its feasibility to be used in 3D printing applications.

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“…The decomposition of HMCs not only changes the initially dense microstructure but also results in the loss of structural integrity, thereby leading to a reduction in sample performance. previous studies (Dung & Unluer, 2016, 2017c.…”

Section: Designmentioning

confidence: 66%

Improving the strength and microstructure of reactive magnesia based concrete blocks

Pu¹

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Influence of nucleation seeding on the performance of carbonated MgO formulations

Cited by 60 publications

References 29 publications

Performance of MgO and MgO–SiO2 systems containing seeds under different curing conditions

Performance of MgO and MgO–SiO2 systems containing seeds under different curing conditions

Investigation of the properties of alkali-activated slag mixes involving the use of nanoclay and nucleation seeds for 3D printing

Improving the strength and microstructure of reactive magnesia based concrete blocks

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