Abstract: The invention relates to a capacitive sensor system comprising sensor electronics and a sensor portion (1) consisting of a synthetic construction material which comprises a sensor electrode (3; 22) and to a method for the production and use of said sensor system.

Abstract: The invention describes an electrical component (10) which at least comprises a section (12) configured as a sensor (sensor section) made of concrete and which contains electrically conductive aggregates (22) which are present in a region (24) near the surface of at least one outer surface (20) of the section (12) in a higher spatial density than in the remaining section (12). In addition, a method for its production and a use of the component (10) are described.

Abstract: The invention relates to a formwork element for a formwork system for concrete building purposes, in particular for integration into a construction plane of the formwork system, having a box-like supporting body (1, 2) facing away from the concrete, having an upper side (6) facing the concrete in use, having a recess (3) in the upper side (6) for the fastening of concrete-facing forming means (11; 11?; 35) which can be fastened on/in the recess (3), having a vacuum-permeable spacer (14; 17) having a plurality of passage openings (16), and having connection devices (7, 8, 9) for applying a vacuum, wherein a plurality of forming means (35) can be reversibly fastened by means of vacuum at the top side (6). The invention also relates to a formwork system having such a formwork element and a concrete component which has been created with the formwork element or the formwork system.