Search

ABSTRACT In this study wood processing by-products were used by replacing natural sand for producing lightweight mortars. Manufacturers of wood products and furniture generate sawdust and pieces of side-cuts from [...]

Graphic abstract:

The main limitations connected to the traditional diagnostic techniques of imaging in orthodontics are that they offer a 2D representation of 3D structures. Given that facial harmony has become one of the main objectives of orthodontic treatment, the aim of the present study was to propose a 3D cephalometric evaluation of the soft tissues of the face. Carrying out the same 3D aesthetic analysis, at the beginning and end of clinical treatment, it is possible to collect information about the influence of orthodontic displacement on the proportions between the diverse areas of the profile.

In the present paper an investigation of mechanical behaviour and thermal conductivity of a lightweight building material containing either styrene butadiene rubber (SBR) or polyurethane (PU) waste particles is presented. Several mortar mixtures were prepared by replacing quartz sand with 0, 10 and 30% of either SBR or PU post-consumer plastics particles. The influence of rubber particle addition on fresh mortar behaviour, compressive and flexural strength of mortar as well as on mortar thermal conductivity was investigated. An optimization of mortar mixture proportions was carried out by adding a limestone powder as filler. The experimental investigation showed that the addition of rubber particles reduces both the material unit weight and the thermal conductivity. The thermal insulating effect of rubber particles indicates a promising potential for future developments. On the other hand, the addition of limestone powder produced higher thermal conductivity as well as higher compressive and flexural strength.