Three metakaolins are evaluated for use as supplementary cementitious materials in cement-based systems. The vary mineralogical composition and fabrication (traditional flash calcination), but quite similar their surface area (16–19 m2/g), composition. Performance of metakaolin mixtures will be compared to two control (standard concrete foundation C40/50 high performance C60/75). In this study,...

A solution polymerization method has been used to synthesize a polyacrylic-type superabsorbent polymer (SAP). The influence of various influential factors, such as the temperature, neutralization degree, cross-linking agent, and initiator, on water absorption capacity SAP investigated. results show that can display non-monotonic behavior depending synthesis conditions. also change according pH,...

AIM The aim of the present review was to systematically assess the dental literature in terms of soft tissue grafting techniques. The focused question was: is one method superior over others for augmentation and stability of the augmented soft tissue in terms of increasing the width of keratinized tissue (part 1) and gain in soft tissue volume (part 2). METHODS A Medline search was performed ...

OBJECTIVE To compare various graft materials in the rabbit model, including autologous cartilage, dermal tissue, fat, and AlloDerm (a cadaver-derived material). METHODS Twenty-five New Zealand white rabbits were used. Equally sized autogenous (fat, fascia, cartilage, and dermal) grafts and AlloDerm were implanted into subcutaneous dorsal pockets on the rabbits. Animals were killed 1, 2, 3, an...

The influence of water-to-cement mass ratio (w/c) on early-age properties of cementbased materials is investigated using a variety of experimental techniques. Properties that are critical to the early-age performance of these materials are tested, including heat release, semiadiabatic temperature, setting time, autogenous deformation, and strength development. Measurements of these properties u...

Introduction: Gold standard for alveolar cleft bone grafting is autogenous bone. Advantage of adding the growth factors to the bone is established, so adding PRF to the autogenous bone may have beneficial effects. Methods:  Platelet-rich plasma admixed with autogenous bone and as a biologic membrane over the bone grafted alveolar cleft was used. Results:  Autogenous bone in all (four cases...

This study explores the effects of interactions among Na 2 O content, metakaolin content and activator modulus on compressive strength autogenous shrinkage alkali-activated slag–metakaolin (AASM) materials. The Box–Behnken RSM design was used to create an experimental scheme, establish a model, optimize mix proportions. Fourier transform infrared spectroscopy, scanning electron microscopy, Merc...

In an attempt to increase sustainability of construction materials, both ground granulated blast-furnace slag (GGBS) and, less popular, copper (CS) can be used in alkali-activated composites. However, such composites are often more susceptible cracking, triggered by the self-desiccation processes. The addition superabsorbent polymers (SAP) may enable internal curing concrete and prevent excessi...

Implants shorten reconstruction, reduce trauma for the patients, are, in principle, of unlimited availability and can be given definable qualities that outnumber those of biological transplants. Lots of sometimes exotic materials have already been suggested for facial surgery and most of them have turned out to be unsuitable in the short or long term, because they did not satisfactorily fulfil ...

Unidirectional dewetting enables the production of large-area thin films with high efficiency at low cost. Herein, we report homogeneous unidirectional dewetting on large-area microdroplet arrays via gravity-induced deformation in droplets combined with alternating lyophilic/lyophobic patterns. This process allows the scaled-up deposition of thin films, including organic semiconductors and tran...