| GENERAL DESCRIPTION |
| CLICK HERE. |
| An Allied brochure on Foamed Concrete is Available for Downloading in .pdf Form - |
| Recent News |
| 1. For 3 consecutive years (2009 - 2011) Allied Foam Tech has been awarded by USCA as the best chemical machinery & equipment manufacturer in Montgomeryville, Pennsylvania. |
| 2. With specific cement compositions, foamed cement with Allied foam products can reach extremely low densities (2-3 pcf or 30-50 kg/m3) with insulative "R" values of 3.0 - 4.0. The material is non-flammable and does not generate smoke upon firing. |
| 3. In early September, 2009 Allied Foam Tech became the only foam company with its products specified by the City of Ann Arbor, Michigan to all contractors as the performance standard for foamed concrete (Reference ITB-4046). |
Foamed concrete or lightweight concrete derived from Allied's aqueous foams are suitable for both precast and cast-in-placeapplications. Some of the highly insulative cementitious foams at densities 48 kg/m3(3 pcf) to 645 kg/m3(40 pcf) or higher can be used as block fills, lightweight roof deck and void-fill materials. Good strength characteristics with reduced weight make lightweight concrete based on Allied's aqueous foams suitable for structural and semi-structural applications such as lightweight partitions, wall and floor panels, and lightweight blocks. Cementitious foams derived from Allied's premium systems are suitable for thin layer coating applications where specific performance criteria are required.
Foamed concrete and foamed cement made with Allied's foam have very fine pore structure, unlike that made with conventional proteinaceous and surfactant foams. The pore structure of Allied's foams hardly show any sign of deterioration as the density of the foamed cement decreases to below 160 kg/m3 (10 pcf). At densities below 160 kg/m3, the pore texture of foamed cement derived from conventional foam agents becomes so coarse that most of them show severe structural collapse.
The dynamic nature of Allied foam systems allows different foam rheology to be incorporated into the host cement/concrete matrix to satisfy a wide range of slump loss requirements.
The inert nature of Allied foam systems makes them compatible with different kinds of aggregates, fillers, extenders, retarders, accelerators, colorants, hydraulic inorganics and many other additives.
HIGHLIGHTS ON ALLIED’S WORK WITH HIGHLY INSULATIVE CEMENTITIOUS FOAM (DEMSITY = 2 - 3 PCF OR 30 - 50 KG/M3)
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| . non-flammable, no smoke upon burning, no drying shrinkage, high "R" value (3.0 - 4.0) |
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3 pcf (50 kg/m3) cementitious foam trowelled vertically on plywood (2.3 inches thick)
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3 pcf (50 kg/m3) cementitious foam towelled vertically on brick surface (2.5 inches thick)
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| HIGHLIGHTS ON ALLIED’S WORK WITH FOAMED DECORATIVE STONES, BLOCKS AND FOAMED PANELS |
| (WE PROVIDE FOAM PRODUCTS, FOAM MACHINERY AND TECH SERVICE IN PROCESS & MIX DESIGNS) |
| Autoclaved aerated concrete (AAC) was introduced in Europe over half a century ago as a lightweight construction material. The key features AAC has over conventional foamed concrete are significantly better strength and lower shrinkage/cracking. However, most of the attempts over the last few decades to introduce AAC to the US either failed or hardly made any signifcant impact to the construction industry. The million of dollars of capital investment needed for the manufacture of AAC over the conventional precast plant is just one of the many reasons reported in the literature. |
| Freshly prepared decorative stone panels with low shrinkage and non-cracking features are shown below: |
| 3.6 feet x 2.6 feet (1.1 meters x 0.8 meters) |
| Total weight = 28 pounds or 12.7 kg. |
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| (the blue center block was acid-etched showing the blue decorative sand texture underneath) |
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| Dimensions of individual panel = 22" x 8" w. thickness of 0.25"-1.25" (0.56meter x 0.2meter w. thickness of 1.6cm-3.2cm) |
| (weight per panel = 3.5 pounds (1.6 kg.) |
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| Freshly prepared cement/aggregate bricks/blocks derived from Allied's specialty foams with high slump loss may even be extrudable and thus amenable for mass production. A freshly cast foam brick at 37 pcf (600 kg/m3) without using any mould is shown below: |
| Freshly Made Foam Cement Brick w. High Slump Loss (density = 37 pcf) | Extruded Foam Cement/Ltwt Aggregate Composite (density = 40 pcf, compressive strength = 660 psi (4.6 MPa)) | Instantly Demolded Cement/Ltwt Aggregate Composite (density = 31 pcf, compressive strength = 460 psi (3.2 MPa)) |
| (a mould-free cast) | (low pressure extrusion) | (demolded in < 1 minute) |
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| HIGHLIGHTS ON ALLIED’S WORK WITH GEOTECHNICAL ENGINEERING, LANDSCAPE ARCHITECTURE AND SLOPED ROOF DECK |
Composites with Allied’s premium foamed cement/high slump-loss/high strength 35 pcf foamed cement allows greater and simpler landscape architecture and roof deck designs not achievable by any conventional cellular concrete.
A. conventional cellular concrete - conventional 35 pcf LDCC (Low Density Cellular Concrete) with shaved expanded polystyrene blocks.
 Very limited slope negotiation for conventional cellular concrete – less than ½ inch drop per 10 feet span. |
| Geofoam/styrofoam blocks of various sizes/shapes are needed to create artificial slopes. |
| Labor intensive and slow process. |
B. New and flexible designs with Allied’s high slump-loss foamed cement
| Highly sloped landscape with > 1 feet drop per 10 feet span can easily be achieved. |
| The use of Geofoam/styrofoam blocks is significantly reduced or totally eliminated. |
| Labor savings and faster process. |
| High Slump Loss Foamed Cement/Lightweight Aggregate Composites with Low Shrinkage at a Dry Density of 35-50 pcf (565 - 806 kg/m3) | |
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| > 2.5 feet drop per 10 feet span (1V/4H) | Full Size Air Conditioner Pad From High Slump Loss/Low Shrinkage Foamed Cement Composite |
| (dry density = 35 pcf) | (dry density = 48 pcf) |
| Field Application of High Slump Loss Foamed Cement Composite on Sloped Geofoam - Harvard University NorthWest Laboratories Project - High Slump Loss Foamed Concrete (through Allied's Tech Service, Products & Machinery) - Completed in December, 2007. |
| The 210,000 square foot above-ground portion of the facility (another 260,000 square feet will be below ground) will also face Hammond and Gorham Streets, complemented by a landscape designed by Michael Van Valkenberg Associates. |
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| (Pre-project mockup work by Allied Foam Tech is shown below) |
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| Mixing & Pumping of High | Applying of High Slump Loss | Finished Foamed Cement Crown | Cross-section of |
| Slump Loss Foamed Cement | Foamed Cement on 1V/4H Slope | On Highly Sloped Geofoam | Landscape after ~ 1 year |
Highly sloped industrial and residential roofdecks or roofings become possible with Allied's high slump-loss foamed cement product and mix design.
Allied's stable foam with high slump loss can be applied directly on corrugated metal sheets of new or repaired roofs without foam dewatering and possible water leakage to the interior structure of the floors underneath while such problems have always been associated with conventional cellular concrete roof decks.
Using Allied’s 35pcf/10 pcf foamed cement composite as roof deck structure will achieve the right combination of thermal insulation and light weight like conventional cellular concrete/styrofoam blocks but with appreciable labor and time savings and the flexibility in roof deck designs with varied shapes and contours not achievable before.
Comparison of Roof Deck Composites from Allied's Foamed Cement Composite & Conventional Foamed Cement/Expanded Polystyrene Board Composite.
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| Allied's 35 pcf/10 pcf Foamed Cement Composite | Conventional 35 pcf Foamed Cement w. EPS Boards |
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| Georgetown University Sports Field, Washington D.C. |
| A unique roof deck project using Allied's foam products and foam generating equipment is shown by a recently renovated sports field on the |
| roof of an existing gymnasium - 120,000 square foot coverage with |
| foamed cement pumped 3 stories high and 500 feet across the field |
| (the weight limit, compressive, shear and other performance demand and its |
| intended use made the project one of its kind in the US roof deck industry.) |
| Completed field with artificial turf covering the foamed cement roofdeck |
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| Foam Sytem used in the above project - |
| AFT-450 series at 40 pcf (645 kg/m3) |
| Roof condition before | Roof preparation | Material Setup | Equipment Setup |
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| Pouring foam cement | Foam cement roofdeck | Turf application | Gym under the deck |
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| A BRIEF COMPARISON OF KEY PROPERTIES BETWEEN ALLIED'S FOAM/AGGREGATE COMPOSITE AND AAC IS GIVEN BELOW: |
| | Allied's Foam/Aggregate Composite | Autoclaved Aerated Concrete (AAC) |
| Compressive Strength(relative to conventional foamed concrete) | High | High |
| Shrinkage/Cracking (relative to conventional foamed concrete) | Low | Low |
| Water Absorption (relative to conventional foamed concrete) | Lowest in the industry |
High (see the figure on lower right)
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| Window for Concrete Processing Additives | Compatible w. various concrete additives, processing aids and pigmentation | Mostly incompatible due to its aggressive steam curing condition |
| Foam Density Available | From 5 pcf to > 90 pcf |
Mostly in the 30 to 50 pcf range (due to the limitation in its foaming process & steam curing efficiency)
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| Method of Production | Precast, cast-in-place & extrusion (with specific mix design & slump loss) | Precast only |
| Capital Investment | Similar to a conventional precast plant |
Millions of $ over a conventional precast plant
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Allied's stable foam products, low water/cement ratio with high range water reducer, and the synergistic use of various lightweight aggregates and other proprietary additives have allowed foamed concrete that matches the compressive strength of AAC with low shrinkage and crack-free. A recent client claims that the use of Allied's foam products allows their lightweight precast outperform all others in the market.
STRENGTH & WATER RESISTANCE PROFILE AT 30 - 60 PCF (480 - 970 Kg/M3) -Loadbearing (low rise), semi-structural & non-loadbearing. |
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| 28 DAYS STRENGTH PROFILE AT 55 - 80 PCF (890 - 1,290 Kg/M3) - loadbearing andsemi-structural. |
| (The following data are derived from mix designs that may have different slump loss characteristics from that at 30 - 60 pcf) |
| Density (Air Dry) | Compressive Strength |
| (pcf) | (Kg/M3) | (psi) | (MPa) |
| 56 | 900 | 1,200 | 8.2 |
| 65 | 1,040 | 1,480 | 10.2 |
| 69 | 1,110 | 1,700 | 11.7 |
| 74 | 1,190 | 2,300 | 15.9 |
| 76 | 1,240 | > 2,500 | > 17.2 |
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| COMPOSITES AT 10 - 20 PCF (160 - 320 Kg/M3) - non-loadbearing & insulative. |
| (WE PROVIDE FOAM PRODUCTS, FOAM MACHINERY AND TECH SERVICE IN PROCESS & MIX DESIGNS) |
| Even at densities as low as 10 pcf, the strength development of Allied's foam/lightweight aggregate composites allows <24 hours demolding time while still maintaining good handling characteristics (all three blocks shown below were demolded in 18-24 hours and were immediately saw-cut to proper size) |
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| 10 pcf (160 Kg/M3) 15 pcf (240 Kg/M3) 18 pcf (290 Kg/M3) |
| PANELS AND BLOCKS BASED ON ALLIED'S FOAM & LIGHTWEIGHT AGGREGATE MIXES |
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| 45 pcf 36 pcf 46 pcf | Cross Seection of Foam/Aggregate Panel |
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| Foam/Aggregate Blocks 35-45 pcf (565 - 726 Kg/M3) |
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PERFORMANCE |
| Some Performance Features of Concrete and Cement Incorporating Allied's Foam Systems: |
 Consistent and fine pore texture at different densities
Low water uptake
Hight early and 28 day compressive strengths
Good thermal and acoustic properties
Wide range of rheological, adhesive and thin-set properties |
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uniform & fine texture 
non-uniform & coarse texture
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