SAINT-GOBAIN PLACO

A computer implemented method for in-line, real-time monitoring of the time-temperature profile of a continuously produced gypsum board in a gypsum board manufacturing line. The method takes as input the signals of a series of infrared sensors placed at given distances along the gypsum board manufacturing line between the moulding stage and the cutting stage of the gypsum board manufacturing line, and further takes as input the speed of the continuously produced gypsum board on the gypsum board manufacturing line. The method provides as output a corrected time-temperature profile of the continuously produced gypsum board. The method includes converting the signals of the series of infrared sensors into a time-temperature profile based on the speed of the continuously produced gypsum board on the gypsum board manufacturing line; processing the time-temperature profile through a correlation model and/or a physical model P-M to calculate a corrected time-temperature profile.

A mixer and a method for the mixing of a cementitious slurry, configured to calculate the volume of the cementitious slurry in the mixer in order to produce an improved mixing process and/or an improved cementitious product. The mixer comprises a sensor to measure a parameter of the slurry in the mixer that is used to calculate the volume of slurry in the mixer.

The invention relates to plasterboard comprising a plaster core arranged between two cover sheets; wherein said plaster core comprises a matrix of gypsum crystals and air pores; wherein at least 90%, preferably at least 94%, more preferably at least 98%, of the air pores are connected by a constriction; and wherein the average neighbor coordination of the connected air pores is between 2 and 6, preferably between 3 and 5.

According to the present invention, there is provided an apparatus ( 100 ) for manufacturing a cementitious slurry comprising foam, the apparatus ( 100 ) comprising a mixing chamber ( 101 ) for mixing a cementitious material and water to form a cementitious slurry, a channel ( 103 ) fluidly connected to the mixing chamber ( 101 ) at a first end ( 111 ), the channel ( 103 ) for receiving a cementitious slurry from the mixing chamber ( 101 ). In the apparatus, the channel ( 103 ) extends from the first end ( 111 ) and terminates at at least one second end ( 112 ). The channel ( 103 ) comprises a first foam inlet ( 106 ) for introducing foam into the channel ( 103 ), wherein the apparatus ( 100 ) is configured, in use, to introduce foam through the first foam inlet ( 106 ) at a velocity 5.4 times or less the velocity of the cementitious slurry in the channel ( 103 ). A method using the apparatus is also described.

An instrument for determining the spreading capacity of a coating or a surface, including a plate on which a gripping system is secured, the tool including a measuring system configured to measure the coating to be spread, wherein the measuring system includes at least one force sensor for generating data relating to the average force applied on the instrument, the maximum force applied on the instrument and the duration, in order to provide a signal representative of the capacity of the coating to be spread or the surface to be spread.

An apparatus ( 100 ) for the production of a plaster slurry is described, the apparatus ( 100 ) comprising a mixer ( 102 ) for mixing at least plaster and water to form a plaster slurry, the mixer ( 102 ) comprising an outlet conduit ( 122 ), a foam generator ( 106 ) for mixing at least air, a foaming agent and water to produce a foam, the foam generator ( 106 ) in fluid communication with the mixer ( 102 ) via a fluid pathway ( 116 ) comprising a foam conduit ( 117 ); and a mass flow meter ( 124 ), wherein the mass flow meter ( 124 ) is configured to measure the density and mass flow rate of the foam within the foam conduit ( 117 ) or the plaster slurry within the outlet conduit ( 122 ). Additionally, a method of manufacturing a plaster slurry is described.

A demountable wall partition system includes a first and a second demountable partition panel each including a board and having a front surface and a rear surface, and a flange connection element. At least one panel mount bracket is connected to each board and protrudes from the rear surface and includes a first end flange extending in a first flange plane parallel with the rear surface of the board and a second end flange. The panels are arranged spaced apart with the rear surfaces facing each other such that the at least one panel mount bracket of the respective panel form at least one pair of aligned panel mount brackets, wherein said brackets are connected to each other by means of the flange connection element which is connected to the end flanges of the brackets such that the flange connection element is supported by the brackets.

Disclosed is a compound with the following formula (I): as well as the use thereof, in particular as a chelating agent of positively charged ions, or as a fluidizing agent for hydraulic compositions. Also disclosed is a hydraulic composition comprising a compound with formula (I), at least one hydraulic binder, at least one aggregate, and water.

There is provided an apparatus ( 100 ) for manufacturing a cementitious slurry comprising foam, the apparatus ( 100 ) comprising: a mixing chamber ( 101 ) for mixing a cementitious material and water to form a cementitious slurry, a channel ( 103 ) fluidly connected to the mixing chamber ( 101 ) at a first end ( 111 ), the channel ( 103 ) for receiving the cementitious slurry from the mixing chamber ( 101 ), the channel ( 103 ) extending from the first end ( 111 ) and terminating at a second end ( 112 ); the channel ( 103 ) comprising a foam inlet ( 106 ) for introducing foam into the channel ( 103 ); wherein the channel ( 103 ) comprises a mixing cross section, the mixing cross section comprising a first dimension and a second dimension; the first dimension perpendicular to the second dimension; the first dimension being longer than the second dimension; wherein the foam inlet ( 106 ) is configured to introduce foam into the channel ( 103 ) in a direction generally parallel to the second dimension. A channel ( 103 ) for a cementitious slurry and a method are also provided.

According to the present invention, there is provided an apparatus ( 100 ) for manufacturing a cementitious slurry comprising foam, the apparatus comprising: a mixing chamber ( 101 ) for mixing a cementitious material and water to form a cementitious slurry, a channel ( 103 ) fluidly connected to the mixing chamber ( 101 ) at a first end ( 111 ), the channel ( 103 ) for receiving a cementitious slurry from the mixing chamber ( 101 ). In the apparatus ( 100 ), the channel ( 103 ) extends from the first end ( 111 ) and terminates at at least one second end ( 112 ). The channel ( 103 ) comprises a first foam inlet ( 106 ) for introducing foam into the channel ( 103 ). The channel ( 103 ) further comprises a second foam inlet for introducing foam into the channel ( 103 ). The first foam inlet ( 106 ) and the second foam inlet are offset along the length of the channel ( 103 ). A method using the apparatus ( 100 ) is also described.