Abstract: A solar cell having a rear backing of a polyvinylfluoride foil is bonded by a mortar consisting of a finely divided neutral aggregate, a hydraulic cement and an aqueous dispersion of a polyacrylic acid derivative having a logarithmic decrement of torsional vibration damping with a maximum at a temperature below 0° C. to the surface of a building composed of concrete, to a porous glass or to a metal plate which is hung on a building.

Abstract: A solar cell having a rear backing of a polyvinylfluoride foil is bonded by a mortar consisting of a finely divided neutral aggregate, a hydraulic cement and an aqueous dispersion of a polyacrylic acid derivative having a logarithmic decrement of torsional vibration damping with a maximum at a temperature below 0° C. to the surface of a building composed of concrete, to a porous glass or to a metal plate which is hung on a building.

Abstract: A construction element for cladding of a structural surface which consists of a glass pane and a layer of bonding mortar on one side of the glass pane, which bonding mortar consists of a fine-particle neutral aggregate and cement and is gauged with an aqueous dispersion of a polyacrylic acid derivative, whereby the polyacrylic acid derivative has a logarithmic decrement determined in accordance to DIN 53445, which has a maximum at Celsius temperatures below 0.degree. C., and the bonding mortar is hardened on the glass pane with a deficiency of hydration water. The construction element is bonded to the surface to be cladded with the adhesive or by contact of the bonding mortar layer with setting concrete of the structure which is cladded with the element.

Abstract: A building element has a slab of concrete having a face, a sheet of glass juxtaposed with the face, and a layer of mortar between and bonded monolithically to the glass sheet and the slab face. The mortar consists essentially of a fine-particulate neutral aggregate, cement, and an aqueous dispersion of a polyacrylic-acid derivative having a logarithmic decrement according to DIN 53,445 which is at a maximum below 0.degree. C. The aqueous dispersion is in an amount insufficient to fully hydrate the cement. In addition the mortar layer has a thickness and a content of polyacrylic acid sufficient to permit differential thermal expansion of the slab and glass without cracking of the mortar layer.