A method of measuring length changes in building materials in model extreme conditions and a device for implementing this method

摘要

ufeffvynu00e1lez relates to method of measuring length changes of construction materials in which samples of building materials dry for at least seven days at a temperature of 100 to 115 degrees and after cooling down to 18 to 24 degrees c is placed in the space with no humidity and constant temperature. this will keep until the samples constant with temperature in space and then bezkontaktnu011b optically measured their linear dimensions.after repeatedly to increase the humidity of 5 to 20%, and regularly bezkontaktnu011b optically measured their length dimensions at an interval of at least one day to stabilise their length until the humidity in a climatic chamber 95%.furthermore, relates to the device for the implementation of this mode, which contains the climate chamber in which is located the basic plate (31) with the boot rastrem (29) for samples of building materials, which is mostovu00e1 structure (1). on the cross arm (19) is located in (23) to which is attached a scanning head (24) with a laser sensor (25).mostovu00e1 structure (1) is formed by a pair of parallel kluznu00fdch line (8) and a separate kluznu00fdm direction (9). a pair of parallel kluznu00fdch line (8) is equipped with a device for linear displacement, comprising a linear trapu00e9zovu00fdm direction (10).the bridge is connected to a pair of parallel kluznu00fdch line (8) with flanges (15) and a trolley (16) and a separate kluznu00fdm guidance (9) on the other hand, using the kluznu00e9ho lock (17) and a remote block (18). a laser sensor (25) is connected with a measuring unit connected with the processing unit.