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POLYMER MODIFIED SETTING BED MORTAR

Thick Mortar Setting Bed for Natural and Manufactured Paving Units
Standard (SB-04) and Color (SB-05)

SUPERIOR ADHESION. EXCELLENT DURABILITY.

SPEC MIX® Polymer Modified Setting Bed (PMSBM) is specifically engineered as a thick mortar setting bed for natural and manufactured paving units. This product contains a unique blend of polymers and other performance enhancing admixtures, allowing it to meet ANSI and ASTM requirements.

SPEC MIX PMSBM can be used as a thick fortified bedding mortar for residential and commercial paving unit applications as well as a joint grouting material between horizontal pavers. It can also be used as a polymer modified dry pack setting bed material in interior and exterior installations allowing light to heavy traffic.

SPEC MIX PMSBM is produced under strict manufacturing standards supported by complete quality control measures. A digital printout displaying the proper proportions per batch may be kept as a permanent record.

Each product is 100% dry, preblended in 80 lb. or 3,000 bags, eliminating the need to measure and add liquid admixtures on site which in turn ensures quality control while increasing jobsite productivity—EVERY JOB!

PRODUCT FEATURES

• Contains a unique blend pf polymers and other performance enhancing admixtures, allowing it to meet ANSI and ASTM requirements
• Can be used as a thick fortified bedding mortar for residential and commercial paving unit applications as well as a joint grouting material between horizontal pavers
• Can also be used as a polymer modified dry pack setting bed material in interior and exterior installations allowing light to heavy traffic
• Produced under strict manufacturing standards supported by complete quality control measures
• Each pack is 100% dry, preblended in 80 lb (1360.7 kb) bags, eliminating the need to measure and add raw materials and liquid admixtures on site

AVAILABLE IN COLOR

LEARN MORE HERE

PMSBM Typical Physical Properties (laboratory prepared)
Compression Strength (ASTM C 109)
1 Day2,000 PSI (13.7 MPa)
3 Days3,000 PSI (20.6 MPa)
7 Days4,000 PSI (27.5 MPa)
28 Days4,500 PSI (31 MPa)
Air Content5%
Water Retention88%
Set Times (ASTM C 403)
Initial Set4 hrs, 30 min
Final Set6 hrs, 45 min
Water Absorption
ANSI A118.7.3.7< 5%
ASTM C 413< 2%
Flexural Strength (ANSI A118.7.3.7)
28-Day> 1,000 PSI (6.8 MPa)
Bond Strength (ASTM C 1583 - *modified)
7-Day> 520 PSI (3.6 MPa)
Shrinkage (ASTM C 157)
7 Day Cure< 0.1%

 

PMSBM Estimated Yields (Approximate)
Bed Depth80 lb (36.2 kg) bag3,000 lb (1,360.7 kg) bag
1 in (25 mm)8 ft² (0.74 m²)300 ft² (28 m²)
2 in (50mm)4 ft² (0.37 m²)150 ft² (14 m²)
3 in (75 mm)2-2/3 ft²(0.25 m²)100 ft²(9.3 m²)
4 in (100 mm)2 ft² (0.19 m²)75 ft² (6.9 m²)

 

SPEC MIX Polymer Modified Setting Bed Mortar Installation/Application

Wet Thick & Fortified Setting Bed
When using SPEC MIX PMSBM as a thick fortified bedding material, use only rigid base diaphragms and over reinforced slab on grade concrete. Do not install over compacted aggregate. The substrate must be clean and porous. Dry and hot concrete slabs should be surface dampened. Do not allow water to puddle. Do not use PMSBM for vertical applications. Allow bed material to cure 24 hours before allowing light traffic and 14 days for heavy traffic.

Polymer Modified Dry Pack
When using SPEC MIX PMSBM as a zero slump consistency (dry pack) bedding material, the use of reinforcing wire mesh is recommended when placing. Place setting bed mortars following ANSI standards and local building codes at depths consistent with the Architect/Engineer’s requirements for the project’s flooring system.

SPEC MIX PMSBM is available in coarse and fine aggregate formulations to accommodate any application requirement. A sample of the proposed product will be provided by the manufacturer for architectural approval and testing, if required. Preparation of a sample panel with all materials and masonry systems employed in the final project is imperative. Retain the mock-up or field sample through the completion of the project.

Clean masonry flooring only with a national proprietary cleaning agent (following the manufacturer’s instructions) or potable water. SPEC MIX products are custom packaged to the specification. They must be kept dry, covered and protected from weather and other damage.


Sizes and Equipment

SPEC MIX PMSBM is available in 80 lb (36.2 kg) packages for easy hand loading or in 3,000 lb (1,360.7 kg) reusable bulk bags to be used with the various SPEC MIX silo systems. When using the silo system, once the bulk bags of mortar are delivered to the project site, the portable silo is loaded with a job site forklift and the product is dispensed into a mechanical batch mixer.


SPEC MIX Polymer Modified Setting Bed Mortar Mixing Instructions

WEAR IMPERVIOUS GLOVES, such as nitrile.
1. Mixing is best accomplished by using a mechanical mixer to ensure optimal workability and performance.
2. When application is dry pack, use clean, potable water; add enough water to create a zero slump, dry pack consistency. Product should retain shape when compressed by hand.
3. When application is thick fortified mortar bed, use clean, potable water; add the amount of water consistent with optimum workability which provides adequate water to satisfy the initial rate of absorption of the paving units and substrate.
4. Mixing times are four to five minutes when using a mechanical batch mixer and should be held consistent from batch to batch.
5. Maintain the same mixing procedures to maintain consistency throughout the project.
6. Hand mix PMSBM only with written approval by the specifier who should outline procedures.
7. Use PMSBM within 2.5 hours after initial mixing.
8. Retemper PMSBM only when mixing water is lost due to evaporation.