| Author |
Message |
Wayne Yancey
Senior Member
Username: wayne_yancey
Post Number: 914
Registered: 01-2008
| | Posted on Friday, February 07, 2020 - 10:56 am: |    |
Good morning from the RAINY PNW.
I am looking for a specification for autoclaved aerated concrete unit masonry for a project in Dubai.
I cobbled one together from the Avitru MasterSpec Section 042200 - Concrete Unit Masonry.
Thanks,
Wayne |
E.A. (Unregistered Guest)
Unregistered guest
| | Posted on Friday, February 07, 2020 - 04:19 pm: | |
Wayne,
I have no experience with it myself, but Hebel USA has a guide spec on their website. Check out the technical downloads page; https://www.hebel-usa.com/en/content/technical_manual_1795.php
Also, the International Masonry Institute has a tech brief on AAC masonry units if you haven't run across it yet: http://imiweb.org/wp-content/uploads/2015/10/01.02-AAC-MASONRY-UNITS.pdf. It notes that IMI has a guide spec, but I couldn't quickly locate it. |
Michael Chusid, RA FCSI CCS
Senior Member
Username: michael_chusid
Post Number: 512
Registered: 10-2003
| | Posted on Friday, February 07, 2020 - 07:08 pm: | |
I was part of the team that tried to commercialize AAC in US in 1990s. See my 1990 article about the material at http://www.chusid.com/blog/ildingproduct.guru/2011/05/best-building-material-you-couldnt-buy.html, or search Chusid + AAC for more info.
I don't have a current spec, but will gladly share whatever I know with you.
Be cautious about using a CMU spec as a basis - the two products have almost nothing in common.
The hebel spec Wayne posted is an ok beginning, but I suggest you ask client which suppliers they are working with. For example, Hebel says their product is made with quartz (a fancy way of saying silica sand), but other manufacturers use coal combustion products and get good results.
http://www.thewhiteblocks.com is in Oman
Are you sure client is using blocks? AAC is also made as reinforced panels.
Internal and exterior finishes sections need to be considered.
If block, is it loadbearing or infil?
Have fun. I love the material.
Michael Chusid, RA FCSI CCS 1-818-219-4937
www.chusid.com www.buildingproduct.guru |
Jerome J. Lazar, CCS, CDT, CSI, SCIP
Senior Member
Username: lazarcitec
Post Number: 2081
Registered: 05-2003
| | Posted on Saturday, February 08, 2020 - 08:14 am: | |
I sent Wayne the Section I created the same day his request was posted. AAC Block is used by some Architects. My first experience with AAC was in Abu Dhabi ten years ago, but it is being used on residential and commercial projects in SFL. Eons ago there was a FL fabricator, Ytong, but they went belly up. |
Jerome J. Lazar, CCS, CDT, CSI, SCIP
Senior Member
Username: lazarcitec
Post Number: 2082
Registered: 05-2003
| | Posted on Saturday, February 08, 2020 - 08:29 am: | |
Michael, AAC is seldom used for Exterior application in SFL, Stucco won't bond to the very smooth surface, but as a shaft wall it seems to be economical. |
Mark Gilligan SE,
Senior Member
Username: mark_gilligan
Post Number: 922
Registered: 10-2007
| | Posted on Saturday, February 08, 2020 - 05:09 pm: | |
Is the structural engineer specifying this product? What does your structural engineer have to say? |
Dave Metzger
Senior Member
Username: davemetzger
Post Number: 762
Registered: 07-2001
| | Posted on Sunday, February 09, 2020 - 01:01 pm: | |
We used AAC for interior partitions for a commercial project many years ago. For installation, need to coordinate with routing the AAC for conduit, and with plastering the AAC. |
Edward J Dueppen, RA, CSI, CCS, LEED AP
Senior Member
Username: edueppen
Post Number: 59
Registered: 08-2013
| | Posted on Monday, February 10, 2020 - 09:01 am: | |
Wayne - I have one I wrote a number of years ago. Drop me a message at edueppen at kahlerslater.com if you are interested. |
Wayne Yancey
Senior Member
Username: wayne_yancey
Post Number: 915
Registered: 01-2008
| | Posted on Monday, February 10, 2020 - 11:26 am: | |
Thank you all you came to my aid. I learned a lot. Never to late.
Mark, the end use is interior partitions, finished with a plaster. I did not require a SE.
Edward. Dropping you a message soon.
Wayne
Thanks again |
Brian E. Trimble, CDT
Senior Member
Username: brian_e_trimble_cdt
Post Number: 118
Registered: 08-2005
| | Posted on Monday, February 10, 2020 - 12:30 pm: | |
Mark and others, AAC is a structural material. The design of AAC structures is found in TMS 402/602 Building Code Requirements for Masonry Structures. It has also been used in structural applications around the world and here in the U.S. including the Evansville State Hospital. |
Michael Chusid, RA FCSI CCS
Senior Member
Username: michael_chusid
Post Number: 513
Registered: 10-2003
| | Posted on Monday, February 10, 2020 - 09:21 pm: | |
Brian:
Does TMS 402/602 apply to AAC used as precast reinforced concrete members, such as floor or roof decks?
Michael Chusid, RA FCSI CCS 1-818-219-4937
www.chusid.com www.buildingproduct.guru |
Brian E. Trimble, CDT
Senior Member
Username: brian_e_trimble_cdt
Post Number: 119
Registered: 08-2005
| | Posted on Tuesday, February 11, 2020 - 11:53 am: | |
Michael,
I don't believe so. The AAC Chapter in TMS 402 is for units laid in thin bed mortar. The units can be rather large (4'x4'), but I don't think it would cover floors or roofs. |
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