Abstract: The invention relates to a device for measuring the electrode potential of the reinforcement in underwater concrete. The device is of the type comprising a reference electrode placed against the facing of the concrete and a voltmeter connected to the reference electrode and to the reinforcement. The reference electrode is disposed in a bell suitable for pressing in watertight manner against a facing of the concrete, thereby delimiting an enclosure. The device further includes means for injecting compressed air into the enclosure and means for enabling the water imprisoned therein to escape.
Type:
Grant
Filed:
April 25, 1991
Date of Patent:
May 11, 1993
Assignee:
L'Etat Francais represente par le Laboratoire Central des Ponts, et Chaussees
Inventors:
Patrick Deeds, Gilbert Grimaldi, Andre Raharinavo
Abstract: The invention relates to an insulating and structural masonry block comprising a sealed envelope of parallelepipic shape in which layers of light, dry aggregate are superposed, separated by a geotextile band placed in accordion like layers. Within the envelope is drawn a pressure lower than ambient pressure.
Type:
Grant
Filed:
February 23, 1990
Date of Patent:
May 26, 1992
Assignee:
Etat Francais, represente par le: Laboratoire Central Des Ponts et Chaussees