Current themes in cement research

Black, Leon; Purnell, Phil; Hill, J.

doi:10.1179/174367510x12714358363805

Cited by 10 publications

(4 citation statements)

References 86 publications

(165 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…13 The induced membrane, for example (Figure 3B), is one of the methods used to increase the density of the vasculature surrounding the defect site and has been reported to successfully repair large segmental defects up to 20 cm. 73 For this technique, a polymethyl methacrylate cement block is placed on the bone defect and is surrounded with the adjacent soft tissues.…”

Section: Current Surgical Approaches To Vascularized Bone Repairmentioning

confidence: 99%

Vascularization in Bone Tissue Engineering Constructs

et al. 2015

View full text Add to dashboard Cite

Vascularization of large bone grafts is one of the main challenges of bone tissue engineering (BTE), and has held back the clinical translation of engineered bone constructs for two decades so far. The ultimate goal of vascularized BTE constructs is to provide a bone environment rich in functional vascular networks to achieve efficient osseointegration and accelerate restoration of function after implantation. To attain both structural and vascular integration of the grafts, a large number of biomaterials, cells, and biological cues have been evaluated. This review will present biological considerations for bone function restoration, contemporary approaches for clinical salvage of large bone defects and their limitations, state-of-the-art research on the development of vascularized bone constructs, and perspectives on evaluating and implementing novel BTE grafts in clinical practice. Success will depend on achieving full graft integration at multiple hierarchical levels, both between the individual graft components as well as between the implanted constructs and their surrounding host tissues. The paradigm of vascularized tissue constructs could not only revolutionize the progress of bone tissue engineering, but could also be readily applied to other fields in regenerative medicine for the development of new innovative vascularized tissue designs.

show abstract

Section: Current Surgical Approaches To Vascularized Bone Repairmentioning

confidence: 99%

Vascularization in Bone Tissue Engineering Constructs

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Raman spectroscopy is a powerful technique based on light-matter interaction that can successfully complement more consolidated techniques such as XRD analysis. It is a completely non-destructive technique that does not require sample preparation, and allows mapping the distribution of cement hydrates produced over different curing periods 28,34,50 . It should be noted that these techniques were not used in previous studies dealing with investigations of the hydration process of cementitious matrices containing CBN.…”

Section: Resultsmentioning

confidence: 99%

Microstructural Investigation of the Effects of Carbon Black Nanoparticles on Hydration Mechanisms, Mechanical and Piezoresistive Properties of Cement Mortars

et al. 2021

View full text Add to dashboard Cite

Carbon-black nanoparticles (CBN) have been incorporated into cement-based materials for improvement of mechanical or self-sensing properties. There is no previous research focused on the microstructural evaluation of effects of CBN on both parameters. In this work, mortars containing different CBN contents were produced, cured for 28 days, and subjected to electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy. Tests for determination of compressive strength, modulus of elasticity and piezoresistivity response were developed. SEM indicated that lower CBN contents refined the cementitious matrix, while higher contents increased the volume of voids. XRD and Raman spectroscopy indicated hydration improvements for CBN contents between 0.375% and 3%. The best mechanical improvements were provided by concentrations of CBN up to 3%. CBN contents of 5% and 6% provided the best sensing properties. The optimal concentration was found to be 5% of CBN, since it provided excellent piezoresistivity, without significant mechanical properties loss.

show abstract

“…The nucleation effect of TiO 2 could modify the pozzolanic performance and hydration process in the concrete in the early stage, resulting in the hydration products being closely embedded in fly ash particles. In the later stage, fly ash particles would participate in the secondary hydration reaction, − ,, more C-S-H gels was formed, and the fly ash particles would lose their original spherical shape due to the reaction. For FC1, there was still some pore structures on the surface, but for FC2, no pore structure existed on the surface and the surface became very smooth and dense with the increased addition of fly ash.…”

Section: Results and Discussionmentioning

confidence: 99%

Solidification and Leaching Behaviors of V and As in a Spent Catalyst-Containing Concrete

et al. 2020

View full text Add to dashboard Cite

With the comprehensive promotion of ultralow emissions and world-class energy consumption standards, the disposal of the spent SCR (selective catalytic reduction of NO x with NH3) catalyst and fly ash has become a new challenge for coal power plants. In this study, a new method of simultaneous utilization of the spent SCR catalyst and fly ash in concrete preparation was developed. The working performance and heavy metal leaching characteristics of concrete prepared by replacing some cement with the spent SCR catalyst/fly ash were investigated. Results suggested that the addition of fly ash could improve the deterioration of concrete fluidity caused by the addition of the spent SCR catalyst. Better working performance was evidenced at 5% of the spent SCR catalyst and less than 10% of fly ash addition. When more than 10% of the spent SCR catalyst was added into concrete, the compressive strength and impermeability of the concrete were significantly worsened, but those could be improved by adding fly ash due to its pozzolanic activity. Leaching characteristics showed that the solidification efficiency of V and As could reach more than 96 and 97%, respectively, which mainly comes from the generation of C-S-H gels by the hydration reaction of cement in the concrete curing process. Results revealed that the method proposed in this study can achieve high-efficiency solidification of heavy metals in spent SCR catalysts. In general, the simultaneous utilization of the spent SCR catalyst and fly ash to replace some parts of the cement for preparing concrete is a promising method for harmless disposal of spent SCR catalysts.

show abstract

Current themes in cement research

Cited by 10 publications

References 86 publications

Vascularization in Bone Tissue Engineering Constructs

Vascularization in Bone Tissue Engineering Constructs

Microstructural Investigation of the Effects of Carbon Black Nanoparticles on Hydration Mechanisms, Mechanical and Piezoresistive Properties of Cement Mortars

Solidification and Leaching Behaviors of V and As in a Spent Catalyst-Containing Concrete

Contact Info

Product

Resources

About