Research on the efflorescence test method of decorative render for out-wall
ZHANG Yinxiang
HUANG Tianyong
LI Yanling
Abstract：There are lots of defects on the efflorescence test method in the JC/T 1024-2007 "Decorative render & plaster for wall".The sample efflorescence could be well tested using the self-made water spray device.The sample efflorescence is much in fluenced by the spray time and the spray time should be more than 30min;the ambient humidity has little effect on efflorescence of render when under spraying,the drying system after spraying has great effect on efflorescence,the efflorescence by oven drying is more severe than by natural curing;the door of the drying oven should be open with about 15 °.The efflorescence is not significant whether the temperature is 50 ℃ or 70 ℃,but the sample color of the latter is changed obviously.It is indirectly certified that the main reason of the efflorescence is the carbonation of Ca(OH)2 from the hydrating of the cement.The test results provide direct evidence for the revision of JC/T 1024-2007,and also can be used for certain reference for relevant parties.
Keywords：decorative render for out-wallefflorescencetest method
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1-4 )