UTBILDNINGSMATERIAL CONDRY - IdéTrading

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Testing and consultants for building and refractory materials
4. Water Absorption
The water absorption was tested on the plates made of Grovebetong supplied by Webers AB,
Goteborg. The samples were cure according to the Swedish standard. The 28 days cube compressive
strength is 40 MPa .The plates were coated with Florosil (Fl), Creom (Cr), and Condry (CON) two
times at the interval of 12 hours (1 day). These plates were put over wet sand bed in a box, the water
was poured so much so that the bottom of the samples were only in contact with the wet sand. The
aim is that the water penetration will only be through the capillary suction. The plates were weighed at
particular intervals. The weights reported are when it has reached saturation point. It means there was
no further absorption. Water absorption is calculated in weight percent. The samples were dried to
constant weight after the test and the weight change was calculated.
Table 2, Water absorption in weight percent with respect to weight at room
temperature, and vapor transmission in kg / hr/m 2
Betong type
Wt change Abs Wt%
g
RT DWT RT DW
t
Vapor exposure
g
Tim
e
hr
Area
cm 2
g/cm 2 /h
r
kg/m 2 /h
r
N 49 70 3.89 5.89 54 4 154 0.0876 0.876
FL 34 37 2.8 3.27 34 4 154 0.055 0.556
CR 28 37 2.17 2.89 21 4 154 0.0396 0.396
CON 11 17 0.89 1.38 9 4 154 0.0146 0.146
RT-Room temperature, DWt-Dry weight, Abs- absorption, g-gram
5. Water Vapor Transport Test
The samples after drying were sealed over a steel pot filled with eater, with the coated surface
downwards. The area of the pot was of 14 cm diameter. The area exposed is Π r 2 ; 3.14X7x7= 154
square cm. It was heated, the steam transported through the coated surface. The t4est was done for 4
hours. The samples were weighed, the weight change is determined and the vapor transmission is
calculated. The results are reported in vapor transmission per square meter per hour.
kg/hr/m 2 = 10x g/hr/cm 2
KARL GUSTAVSGATAN 22B, Tel.+46 31-454920
S-411 25 GOTHENBURG, SWEDEN Org. nr: 5562375435
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