vi. architectural design - aercon aac design.pdfcertain fundamental principles. the first...

VI. Architectural Design

A. General Page VI-2

B. Design Flexibility Page VI-3

C. Compatibility Page VI-4

D. Moisture Behavior Page VI-5

E. Exterior Surface Treatment Page VI-10

F. Interior Surface Treatment Page VI-15

G. Acoustic Performance Page VI-18

Options available when using AERCON are limited only by the imagination.

An Architect’s responsibilitiesfor a commercial project canvary from the site developmentto the furniture selection.However, when an Architect isdeveloping a concept, the twomost critical considerations fora well designed commercialbuilding are the aesthetics andfunct ional i ty . A ta lentedArchitect combines both ofthese qualities to form anarchitectural statement vicari-ously through the building.When an Architect uses anAERCON system, a choice ismade to use one of the mostversatile and user friendlymaterials available in today’smarket. The options availableare limited only by anArchitect’s imagination andAERCON does the rest.

A. General

VI - Architectural Design

06/03 / VI-2

This well designed middle school complex combined the attributes of AERCON with metal trusses, columns and studs to achieve a project with both aesthetics and functionality.

An Architect’s first approach toa new system has to containcertain fundamental principles.The first requirement is designflexibility and the second iscompatibility with other build-ing systems. A building con-cept that is afforded a multi-tude of options in design flexi-bility will influence andenhance the building. For asystem to be effective and eco-nomical for an Owner andArchitect, AERCON should beintroduced during the earlyphases of a project to the par-ties concerned to capitalize onthe extensive AERCON productbenefits. Some of the manyarchitectural features that canbe created with AERCON prod-ucts are illustrated. Contact anAERCON Representative foradditional features.

B. Design Flexibility

06/03 / VI-3


An exterior covered walkway was selectedfor this elementary school constructed ofAERCON walls and floors. Other schoolspreferred interior corridors, which werealso constructed using AERCON products.

A majestic AERCON column accentuates the canopiedentrance to this warehouse facility.

An educational administration building constructed ofAERCON products incorporated a magnificent entryway,greeting visitors with an awe-inspiring stateliness.

AERCON wall panels were used to create the impressive parapet walls for thisretail/warehouse facility.

This unique corner porch arrangement for a college dor-mitory was achieved by angling the AERCON walls thatsupported a hollowcore floor system.

Besides the unique architec-tural features, the AERCONsystem is extremely com-patible with other buildingsystems and materials.Porte cocheres, entry ways,atriums and other desirablefeatures can be realized withunique styles and flairs.Various materials, such aslight gage metal, fiberglass,brick, concrete, wood andglass, can be combined withAERCON products. Manycreative designs can beachieved by combining thesematerials without any loss offunctionality.

C. Compatibility


06/03 / VI-4

This school facility combined AERCON non-load bearing wall panels with metal trusses, columns andstuds to achieve a functional and aesthetically pleasing project.

AERCON non-load bearing wall panels were used in conjunctionwith a prefabricated steel superstructure to create the building enve-lope for this church.

A durable brick façade and a resilient metal roof deck system wereintegrated with AERCON load bearing wall panels and roof panelsto produce this modern, attractive multi-classroom building.

AERCON load bearing wall panels supported long-spanwood trusses to provide a magnificent sanctuary andmeeting rooms for this church facility.

The unique exterior styling and features such as pilasters, gablewalls, metal roof deck and brick accent were accomplished usingAERCON block and roof panels.

Moisture from both external andinternal sources can causedamage to buildings.Therefore, moisture protectionis a primary consideration inbuilding design and detailing.External moisture sourcesinclude rain and water from thesoil. Moisture inside a building,usually in the form of humidity,can cause condensation on thesurface of any wall as well ascondensation inside the wallitself. Moist walls can allowmold to grow, cause surfacediscoloration and cause damageto plaster and wall finishes.Buildings with consistentlymoist walls and floors alsopromote an unhealthy environ-ment where mold and bacteriacan be present. The goal whenconsidering moisture protectiondetails is to avoid allowingmoisture, either from externalor internal sources, to damagethe building or make thebuilding uncomfortable.

While water in itself does notharm AAC products, it canresult in some short-term unde-sirable behaviors. Specifically,when the moisture content ofthe AAC is high, the thermalconductivity is increased,

resulting in lower thermalinsulation performance.Determining the various proper-ties of the building material isthe first consideration whenaddressing moisture protectionissues. When the propertiesinherently resist infiltration ofmoisture into the material, theconstruction details and coat-ings become much more sim-ple. However, when the materi-al has a high potential for mois-ture absorption or infiltration,the construction details becomemuch more significant.

AAC material does not haveinterconnected porosity, socapillary action breaks downquickly and moisture cannotcontinue “pulling” very deep intothe material. Only the materialnear the surface directly in con-tact with the water is affected.Since the absorption of waterinto the AAC is minimized,coating of the walls during thebuilding construction can bescheduled at any convenienttime or sequence. The interiorwalls and components of thebuilding may be completedwithout concern of damage dueto water migration through theAERCON material.

When AAC is manufactured,curing is achieved in a steam-filled, pressurized autoclave.During that process, the AACproduct is saturated with steamand moisture. At the end of theautoclaving process, the AACusually contains approximately30% (by weight) water. Thisinternal water dissipatesnaturally over time to stabilize atits long-term moisture contentof 4 to 8%.

During the typical initial drying-out process, two different ratesof water dissipation occur.First, while the internal moisturecontent of the AAC exceedsapproximately 18%, rapid diffu-sion of the internal moisturefrom the AAC is experienced.Ideally, vapor permeable coat-ings on wall surfaces and theinterior surface of roof panelsdo not impede this process and,depending on the time of con-struction, can be at levelsapproaching or below 18% bythe time the building is “dried-in”. When constructionschedules require the buildingto be completed and occupiedquickly, mechanical methodssuch as dehumidifiers becomedesirable for expediting this

D. Moisture Behavior

06/03 / VI-5


initial phase of drying. After theinternal moisture content of theAAC material drops belowapproximately 18%, the rate ofdiffusion is reduced. In mostcases, the continued rate ofdrying is low enough that anymoisture and humidityintroduced into the building canbe adequately removed by theair-handling system. The mois-ture radiating from the wallsbecomes insignificant andunnoticeable to the occupants.Due to this natural process ofwater diffusion, the wallsurfaces should not be coatedwith any type of vapor barriersince it would impede thediffusion of the excess moisturefrom the AAC material.

Overall, excessive moisturelevels in many buildingmaterials during the first fewmonths after construction iscommon. Proper design, detail-ing and construction practicescan very easily overcome thisissue and alleviate moistureproblems for the owner. In aneffort to expedite the process ofallowing the AAC material toattain its long-term equilibriummoisture content, the followingmeasures are recommended fordesign and construction.

First, specify and use interiorand exterior wall coatings thatrepel water but allow the AAC tobreathe. Specifically, coatingsthat allow vapor penetration, butnot moisture penetration arehighly recommended. If a vaporimpermeable waterproofing thatrestricts vapor flow through theexterior surface of a wall isapplied, such as in the case of abasement wall, moisture withinthe AAC can only be diffusedtoward the interior of the build-ing, thus increasing the timenecessary to achieve anequilibrium moisture content inthe wall. It is advised not to sealboth the interior and exteriorsurfaces of walls with any typeof vapor barrier such as dampproofing on the exterior surfaceand vinyl wallpaper on theinterior surface. If such acombination of two imperme-able systems are used, the inter-nal moisture is trapped and thesurface under the vapor barrierswill have a much greater possi-bility of allowing mildew to form.

Proper design of air handlingsystems is critical for anybuilding. It is recommended toalways pre-treat outside airbefore it enters the building.This outside air should then be

injected into the air conditioningsystem clean, dry and at aneutral temperature. It is alsonecessary to provide air-handling equipment that isproperly sized. Air-handlingequipment is usually sizedusing maximum building loads.Since this maximum loadusually only occurs during asmall percentage of the time,the system is “oversized”during much of the year causingit to only run for short, infre-quent cycles. Therefore, it isimportant that the air-handlingsystem not be “oversized” forthe maximum load design.

For buildings with suspendedceilings, the ultimate goal forpeak performance is to attainthe same quality of air aboveand below the suspendedceiling. The entire space shouldbe controlled to achieve acommon environment – interms of temperature, humidityand air circulation. Whennecessary or desired, fans maybe placed in the space above theceiling in order to increase theair circulation.

Finally, when using AERCONWall and Floor/Roof panelstogether, a very airtight


06/03 / VI-6

construction is achieved.Therefore, prior to enclosing thebuilding, sufficient time to allowthe solid AERCON material todry-out should be given, typical-ly a few months. The mostdesirable and cost efficientmethod is to allow the environ-ment to dry-out the buildingnaturally. As in normal design,the building’s supply air shouldbe controlled using dehumidi-fiers. The air conditionersshould control and re-circulatethe interior air only. Theyshould not be used as a mecha-nism to introduce make-up orsupply air into the building. Ifconstruction schedules requirequick occupancy, dehumidifiersmay be desirable during the firstyear of occupancy. These tem-porary dehumidifiers would takecare of the excess moisturebeing emitted from the walls

and roof systems.

In instances where the humiditylevels inside a building are highand the temperatures dropbelow the dewpoint, condensa-tion will form – regardless of thebuilding materials. As long asthe humidity and temperatureare properly controlled, thedewpoint temperature shouldnever be realized. Normal build-ing operating conditions are 75o

F and 60% relative humidity. Asshown on the following graph,75o F is well above the dewpointtemperature of 60o F for 60%relative humidity and condensa-tion formation should not occur.

All buildings must be protectedfrom the influence of externalmoisture sources. SinceAERCON demonstrates verygood moisture protection with-

out any additional treatments,the construction details canfocus on simplicity and aesthet-ics. The most common andeffective ways are to applywater-protecting brick façadesor stucco, paints or bituminouscoatings to the exterior surfaceof the walls and implementproper flashing and architectur-al details. Since most coatingssuch as stucco and plaster areapplied to a wetted surface andrequire water to cure, the inter-nal moisture content of the AACwall is not normally a concernand does not create bonding orperformance problems.

The selection of the exterior wallcoating is dependent on thedesired aesthetic look of the fin-ished building. Several choicesare readily available which willprovide the desired moisture

protection. Typicalselections includepainted stucco andbrick façades. Witheither system, properflashing and con-struction detailsshould be utilized.

06/03 / VI-7


DEWPOINT

0

20

40

60

80

100

120

30 40 50 60 70 80 90 100

Air Temperature ( o F)

100% RH

75% RH

50% RH

Dew

poin

t (

0 F)

Air Temperature ( 0F)

Various moisture-related properties of AAC are given in the following graphs.


06/03 / VI-8

Ref: RILEM Recommended Practice Autoclaved Aerated Concrete, Section 3.4

Ref: RILEM Recommended Practice Autoclaved Aerated Concrete, Section 3.4

Water Penetration into AAC

0.00

0.50

1.00

1.50

2.00

2.50

0 4 8 12 16 20 24

Time t (hrs)

Bcs=0.01

Penet=(Bcs)*(t 1/2 )

0.000.501.001.502.002.503.003.504.004.505.00

0 4 8 12 16 20 24

Time t (hrs)

aw = 4

Absorbed Water= (aw) * (t 1 / 2 )

Absorbed Water into AAC

Time t (hrs)

Abso

rbed W

ate

r(p

sf)

06/03 / VI-9


Typical absorption and desorption isotherm of AAC

0

2

4

6

8

10

12

14

0 20 40 60 80 100

Relative humidity (%)Relative humidity (%)

Rela

ted

wat

er c

onte

nt ∆

W/W

(%)


Various options for exteriorsurface treatments are avail-able including stucco, paint,and numerous façade materi-als. By changing features assimple as color schemes andwall textures, very attractiveand different appearances canbe achieved. Designing withcolors can change the face of abuilding, creating a special cor-porate image or adding thatpersonal touch. A broad spec-trum of textures can alsoenhance a building’s image.

The color of AERCON productsis natural white to grey-white.Due to the effects of storage,variations in raw materials andthe climate, slight variations inappearance may occur. Poresof different size at the surface

are an inherent characteristic ofautoclaved aerated concrete(AAC) and are not considereddefects in the quality of theproduct.

Coatings for AERCON productsare readily available in unlimit-ed color possibilities. They areeconomical to apply with abrush, sprayer or roller

E. Exterior Surface Treatment

06/03 / VI-10

Many options are available in finishing AERCON products, including stuc-co, paint, and numerous façade materials.

By changing features as simple as color schemes and wall textures, very attractive and different appearancescan be achieved.

depending on the particularapplication. Two types ofpatching mortar, specificallydesigned to be compatible withAAC, are currently available torepair damaged areas prior tocoating application. The sever-ity of the damage dictateswhich mortar should be used.

Painted StuccoExterior coatings manufacturedfor AAC are designed to bephysically compatible withAERCON products.Lightweight Portland cementstuccos comparable in strengthand density are recommendedto assure long-term bondingand crack resistance.Additionally, lightweight stuc-cos are polymer modified toprovide enhanced bonding andworkability. While lightweightstuccos are highly vapor per-meable and thereby assurerapid structural drying, they arealso completely hydrophobicand will not allow water pene-tration. AAC coatings are sub-ject to high thermal tension.Therefore any coatings usedmust have permanently highelasticity.

For AERCON block projects,exterior lightweight stucco isusually applied in a single coatat a minimum thickness of 5/16inch, following the manufactur-er’s recommendations. A tex-ture coat of 1/8 inch is thenapplied to the hardened sur-face. Lightweight stuccos areavailable in numerous texturesincluding a grooved, pebbledor typical sand finish variety.Once the textured stucco hasset, apply two coats of vaporpermeable masonry paint. Anypaint must be vapor permeableto allow moisture inside theblock to escape.

Panels with mortared joints

must be treated prior to theapplication of any surface coat-ing. The panel joints are coat-ed with a thin layer of acement-based compound.Embedded into the cement-based compound along thepanel joint is an alkaline resis-tant fiberglass mesh. Acement-based compoundbasecoat is applied over theentire surface at a minimumthickness of 1/8 to 3/16 inch.Immediately after the basecoatdries (normally within onehour), skip trowel a light tex-ture onto the basecoat. Oncethe textured basecoat has set,apply two coats of vapor per-meable masonry paint.

06/03 / VI-11


Exterior coatings manufactured for AAC are designed to be physicallycompatible with AERCON products.

PaintIf desired, paint can be directlyapplied to unmortared panelswhich have tongue and grooveprofiles and chamfered cor-ners. Paint used for this appli-cation must reliably seal theslight surface irregularities ofthe panels. For this purpose,acrylic coatings with a higherfilling capacity than is custom-ary with ordinary paints mustbe used. These polymericcoatings are typically applied intwo coats to achieve a mini-mum of 1 mm total thickness.

While paint can be directlyapplied to AERCON walls madeof blocks or mortared panels,extreme care in joint prepara-tion is required to achieve an

acceptable appearance. Thejoints in an AERCON mortaredwall are much thinner than inconventional masonry con-struction and therefore aremore likely to reveal minorimperfections. Even with theacrylic coatings noted above,joints may be visible. For appli-cations where appearance isnot a dominant consideration,such as industrial buildings orgarages, applying paint directlyto an AERCON wall can be aninexpensive and time-savingalternative. Any paint that isused must be vapor permeableto allow moisture inside theblock to escape.

FaçadesThe use of ventilated façades

as an exterior surface treat-ment is very appropriate from ahumidity and thermal point ofview. Therefore, variousfaçades such as wood shakes,brick, stone, metal siding, vinylsiding and cementitious panelscan be utilized. A furring stripsubstructure is advantageoussince it allows back ventilation.The furring strips are bestattached to AERCON using AACfasteners. Install all externalmaterials per the specific man-ufacturer’s recommendations.Typical waterproofing detailsincluding weep holes, flashing,lapping, connections andmembranes should be incorpo-rated in order to achieve thedesired weather tight construc-tion.

Joint TreatmentListed below are three basictypes of joints, classifiedaccording to application,requirements and orientation.In any case, the horizontal andvertical joints in AERCON wallsmust be weather tight.Suggested details are shown.Other options may be suitabledepending on the projectrequirements. All materialsmust be compatible with AAC.


06/03 / VI-12

Coatings for AERCON products are readily available in unlimited colorpossibilities.

• Type A – Non-movable water-proof joint

• Type B – Slightly movablewaterproof joint

• Type C – Expansion joint

At elastic wall joints, no coatingshould be applied. This may beachieved by covering suchareas with masking tape.Coating or spackling of the ver-tical joints in a horizontal wallpanel system is not recom-mended.

Ceramic TilesCeramic tiles are not suitableweather protection whenapplied directly on AERCONexterior walls because of thevaried thermal conductivity ofceramics as compared to AAC.In addition, the difference indiffusion-inhibiting propertiesof ceramic surfaces whichcause considerable tension,usually leads to loosening orcracking and finally to thedestruction of the ceramic sur-face.

06/03 / VI-13


Designing with colors can change the face of a building, creating a spe-cial corporate image or adding that personal touch.

JOINT TYPE A

1. ACRYLIC COMPOUND JOINT FILLER2. AERCON WALL PANELS3. EXTERIOR COATING SYSTEM

JOINT TYPE B

1. SUPPORT STRUCTURE2. AERCON WALL PANELS3. ELASTIC ACRYLIC SEALER4. POLYETHYLENE BACKER ROD5. FILLER MATERIAL6. EXTERIOR COATING SYSTEM

JOINT TYPE C

1. SUPPORT STRUCTURE2. AERCON WALL PANELS3. ELASTIC ACRYLIC SEALER4. POLYETHYLENE BACKER ROD5. FILLER MATERIAL6. EXTERIOR COATING SYSTEM

5

2

1

2

4

3

6

3/8"

3/8"

2

2

1

3

2

11

5

4

6

3

2

1/2"

3/4"


06/03 / VI-14

Colors & Textures


06/03 / VI-15

In addition to the energy sav-ings and healthy environmentthat AERCON provides, manydifferent interior effects can beachieved. Wall treatments canrange from smooth or texturedpaintable surfaces to wallpa-pers and tiles. Ceilings andwalls can be designed withattractive visible joints orsmooth surfaces. Differentmoods can be attained throughspecial lighting arrangementsand color schemes. In fact,with proper consideration,almost any conventional interi-or surface treatment can beused with AERCON.

PlasterInterior coatings manufacturedfor autoclaved aerated concrete(AAC) are designed to be phys-ically compatible with AERCONproducts. The properties ofboth skim coat plasters andlightweight interior plastersmust be similar to the AERCONmaterial. Bonding agents aretypically incorporated intothese products to provide max-imum adhesion and resiliency.Wall panels should be coatedwith a skim coat plaster toachieve a smooth finished sur-face. Over blocks, lightweight

interior plasters provide athicker coating to level andstraighten walls and provide abase for decorative interiorpaints and wall finishes.

Interior plaster applied to wallpanels should be a mineral-based compound. The plasteris usually applied in a singlecoat to a thickness of 3/32 to1/8 inch, following the manu-facturer’s recommendations.The surface is then finished toa smooth and even quality.

Interior plaster applied to blocksurfaces should be a gypsum-based compound. The gyp-sum-based plaster is usually

applied in a single pass toapproximately a 1/4 inch thick-ness, following the manufac-turer’s recommendations. Asecond veneer coat shouldthen be applied to smooth andeven the surface.

Depending on the size and com-plexity of a project, the typicalplaster products can be eithersprayed on or troweled on.

Gypsum BoardGypsum board may be appliedto AERCON exterior andinterior walls. One method ofattachment is to fastencommon gypsum board topressure treated furring strips

F. Interior Surface Treatment

Wall treatments can range from smooth or textured paintable surfaces to wallpapers and tiles.

that have been secured to thewall. The furring strips are bestattached to AERCON using AACfasteners. An alternative is tofasten the gypsum boarddirectly to the wall using acommercial adhesive andscrews. Consistent with stan-dard construction practice,moisture resistant gypsumboard is recommended in highhumidity regions such as bath-rooms and saunas.

Wall TileSurface preparation for ceram-ic wall tile applied to AERCONis only necessary when the wallsurface requires leveling. Whennecessary, a Portland cementor gypsum-based parge coatshould be applied to the sur-face prior to setting the ceram-ic tile. In moist areas, such asshower areas, only a Portlandcement parge coat should beused. The ceramic tile shouldthen be adhered to the pre-pared wall using either acement thin set mortar or anorganic adhesive. In moistareas, only a cement thin setmortar should be used.

PanelingWood, plastic, masonite and

composite paneling can all beinstalled using furring strips inthe same manner as suggestedfor gypsum board. Rough orfinished lumber can also beused to achieve a rustic look.

PaintWhile paint can be directlyapplied to AERCON walls madeof blocks or mortared panels,extreme care in joint prepara-tion is required to achieve anacceptable appearance. Thejoints in an AERCON mortaredwall are much thinner than inconventional masonry con-struction and therefore aremore likely to reveal minor

imperfections. Even withacrylic paint, which has a high-er filling capacity than ordinarypaint, joints may be visible. Forapplications where appearanceis not a dominant considera-

tion, such as industrial build-ings or garages, applying paintdirectly to an AERCON wall canbe an inexpensive and time-saving alternative. Any paintthat is used must be vapor per-meable to allow moistureinside the block to escape.

WallpaperWallpaper can be directlyadhered to an AERCON wall.


06/03 / VI-16

Where appearance is not a dominant consideration, applying paint directly to anAERCON panel wall can be an inexpensive and time saving alternative.

When necessary for leveling orsmoothing, a Portland cementor gypsum-based parge coatshould be applied to the sur-face prior to installation of thewallpaper. Just like other fin-ishes directly applied toAERCON, any wallpaper that isused must be vapor permeable.Vinyl wallpaper is not recom-mended due to its inability toallow moisture to diffuse fromthe AERCON material.

CeilingsTypical surface treatments forceilings are basically the sameas noted above for walls.Additionally, suspended ceil-ings can also be installed tocreate space for HVAC, plumb-

ing, ventilation, or other utilitycommodities, as well as provid-ing an attractive environment.Suspended grids for use withceiling panels made of gypsum,fiberglass, plastic, wood ormetal, can be fastened directlyinto an AERCON floor/roofpanel or into pressure treatedfurring strips fastened to theAERCON floor/roof system.

AccessoriesDécor enhancements such ascrown molding, chair rails, wallbase, wainscot, and trim workcan also be readily incorporat-ed. AERCON can be used forfireplace chimneys and as theback-up system for hearth fire-bricks. Whether a traditional

atmosphere is desired or aneccentric flair displayinguniqueness is preferred, anAERCON structure can be uti-lized to fit your needs.

FlooringAERCON floor panels canaccept floor coverings such ascarpet, vinyl sheet, vinyl compo-sition tile, ceramic tile, rubbertile, terrazzo, wood andlinoleum. The tongue-and-groove profile of AERCON floorpanels provides a method ofalignment for adjacent panels,resulting in a uniform surfacefor the flooring to be set on.Normally, a leveling topping isnot required, but one can beused if necessary or desired.

06/03 / VI-17


Interior coatings manufactured for AAC are designed to be physical-ly compatible with AERCON products.

When covering AERCON products with wallpaper, itmust be vapor permeable.


06/03 / VI-18

Noise control in buildings is ofgreat significance for the healthand well-being of the occu-pants, especially in multifamilydwellings, since they must pro-vide an environment that isrestful and relaxing. The build-ing envelope must also main-tain privacy for the occupant.Noise control is also an impor-tant factor in other types ofbuildings such as schools,hospitals, hotels and offices.AERCON provides a soundinsulation value of 7dB greaterthan other solid building mate-rials of the same weight persurface area. AERCON’s highsurface mass coupled with themechanical vibration energydamping within its porous

structure produces a construc-tion material with exceptionalsound insulation properties.

In addition to using a wallmaterial with superior soundinsulation properties, it isalways essential to constructthe wall in a manner that clos-es off air leaks and paths bywhich noise can go around orthrough the assembly.AERCON’s simple constructionmethods and details help toeliminate imperfections thatallow sound transmissionthrough the walls, thus provid-ing a final wall assembly whichoffers superior sound insula-tion characteristics for theoccupant.

Also, it should be noted that theresults of tests conducted withAERCON block wall construc-tion apply to AERCON rein-forced panels. This is due tothe fact that the concrete densi-ty of all AERCON products isthe same for a given StrengthClass.

The following examples showthe Sound Transmission Class(STC) rating for typicalAERCON wall constructionsaccording to ASTM E 90 andGerman Standard DIN 4109.

G. Acoustic Performance

1/8" LIGHTWEIGHT STUCCO

8" AERCON WALL

1 1/4" FURRED GYPSUMBOARD WITH SOUNDINSULATION

STC = 51AERCON WALL

(DIN 4109)

AERCON WALL(2) 6" WYTHES

1 1/2" BATTINSULATION


06/03 / VI-19

8" AERCON BLOCKWALL

1/2" LIGHTWEIGHTSTUCCO

1/4" GYPSUMPLASTER

4" AERCON PARTITIONWALL

1/4" CEMENTITIOUSPLASTER

STC = 44AERCON Blocks

(ASTM E 90)

STC = 36AERCON Interior Wall Partitions

(ASTM E 90)

BRICK FACADE

1 1/2" AIR SPACE

8" AERCON WALL

3/8" GYPSUMPLASTER

STC = 65AERCON Cavity Wall

(DIN 4109)

STC = 57AERCON Wall with Brick Façade

(DIN 4109)

Dry Density = 43 pcf. Dry Density = 25 pcf.

Dry Density = 29 pcf. Dry Density = 36 pcf.


06/03 / VI-20

AC2 AC4 AC64 in 32 34 37

6 in 37 39 42

8 in 40 42 45

10 in 42 44 47

12 in 45 47 50

AC2 AC4 AC64 in 34 36 38

6 in 38 40 43

8 in 41 43 46

10 in 43 45 48

12 in 45 48 51

AC2 AC4 AC64 in 34 36 39

6 in 38 40 43

8 in 41 44 46

10 in 43 45 48

12 in 46 48 51

Values are obtained from either test values or calculations.

Transmission of sound generatedfrom internal sources such asmachinery or equipment can besignificantly reduced by usingAERCON.

STC values for various thicknesses, Strength Classes and surface treatments


06/03 / VI-21

Sound absorption is a majorcharacteristic of the overallacoustic performance of a wall,floor or roof system. By usingAERCON assemblies, the trans-mission of sound generatedfrom internal sources such asmachinery or equipment can besignificantly reduced.

The following graph indicatesthe sound absorption of anuncoated / unpainted AERCONsurface. The excellent NoiseReduction Coefficient (NRC)for AERCON surfaces providesgreat sound absorption withoutany additional measures.

Sound Absorption

125 250 500 1000 2000 4000

0.08 0.10 0.12 0.15 0.20 0.22

f in Hz

SoundAbsorptionCoefficient

100 125 250 500 1000 2000 4000 6300

Soun

d Ab

sorp

tion

Coef

ficie

nt

Frequency (f), Hz

Noise Reduction Coefficient (NRC) = 0.15

0.4

0.3

0.2

0.1

0

SOUND ABSORPTION OF AN UNCOATED/UNPAINTED AERCON SURFACE

vi. architectural design - aercon aac design.pdfcertain fundamental principles. the first...

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