Abstract: An expanding insert (4) for rail spikes is bent from a bar material and has two first and second limbs (40, 41) which are connected to one another via a first bend (43) and extend at least approximately parallel to one another, and a third limb (42) connected via a second bend (44) to the second limb (41). The first limb (40) and the second limb (41) are located in a common first plane (E1) and the third limb is located in a second plane (E2) which is substantially perpendicular to the first plane.
Abstract: The invention relates to a method and sealing agent for sealing cracks in concrete crossties of a railway rail, in particular in concrete crossties of a ballastless track, wherein the cracks have a width equal to or less than 1 mm. According to the invention, a mixture of an epoxy resin binder with quartz sand is used, wherein the quartz sand has a grain size of 0.1 mm to 1 mm.