Perforated clay bricks

FERNANDO · Post by **FERNANDO** » Sun Aug 31, 2008 11:02 pm -1100

Dear WUFI users,

I am trying to model a wall made of two layers of fired clay masonry. The problem is that bricks are not solid but perforated; I mean that around 50% of the volume of the piece is empty (air holes).

I am not sure on how to define the properties of this layer, in particular the hygric properties. Any suggestions?

Thank you in advance,

Best regards

Fernando Domínguez Muñoz
University of Málaga (Spain)

Christian Bludau · Tue Sep 02, 2008 9:23 pm -1100

Hello Fernando,
we usually use an overall value for the bricks, the properties of the bricks are measured in the direction, in which they are build in into the construction. I can send you some material properties for clay bricks if you send me your email-address.
Best regards,
Christian

FERNANDO · Post by **FERNANDO** » Wed Sep 03, 2008 1:14 am -1100

Dear Christian,

my e-mail is fdmfernando@yahoo.es

Thanks

Best regards,

Fernando.

C. Furtaw · Post by **C. Furtaw** » Tue Feb 03, 2009 8:38 am -1100

Christian,
Would you please send me that list also.
My email address is cefpe@comcast.net.
Incidently most bricks are 75% solid to meet the ASTM specs.
C. Furtaw

M. Orosz · Post by **M. Orosz** » Sat May 12, 2012 1:34 am -1100

Dear Christian,

Please send that list to me as well, if it is possible.
My email address: mate.orosz@gmail.com

Thank you!

Christian Bludau · Sun May 13, 2012 7:04 pm -1100

Hello,
this posting is not up to date any more.
We have some clay bricks with holes in the database now. See in the Fraunhofer Source the materials called "aerated clay bricks". There are also two in the Masea Source: "Aerated Clay Brick and Insulation Brick"
Christian

james bertram · Post by **james bertram** » Thu Aug 07, 2014 5:53 pm -1100

Good morning - I'm modelling cavity masonry (two leaves of masonry with a central cavity).

Typical Australian masonry is extruded - for this "Solid Brick, extruded" (Fraunhofer Material Database) appears the best option. However, differences for data I can find include:

Dimension - "Solid Brick, extruded" = 240mmm and 400mm wide, local bricks are (mm) 90Wx290Lx162H and (mm) 110Wx230Lx76H. Is it ok to use a reduced width dimension?

Density - "Solid Brick, extruded" = 1650 kg/m3, local bricks are 90mm = 1460 kg/m3 and 110mm = 1260 kg/m3 - not sure how what to do, lower local densities suggests more void space and less clay?

A-value - "Solid Brick, extruded" = horizontal 0.24, only local info is "Initial rate of absorption" (kg/m2/min - presume this is horizontal at face) 90mm <1.8, 110mm <1.4 and "Cold water absorption" (%) 90mm <12, 110mm<11. No sure how/if I can to convert/translate kg/m2/min to kg/m2.sqrt sec?

Thermal conductivity - "Solid Brick, extruded" = 0.6, seems the same as local "typical" data.

Thank you.

Perforated clay bricks

Perforated clay bricks

WUFI data on perforated clay bricks