SECTION 04810 - UNIT MASONRY ASSEMBLIES

PART 1 – GENERAL

1.1 SUMMARY

E. For LEED Projects – see Division 1 Section ‘LEED Requirements Summary’ for recommendations and requirements for recycled content, regional materials, FSC certified formwork, low-emitting concrete finishes and LEED submittal requirements for all concrete materials

1.2 SUBMITTALS

F. Submittals for Environmental Performance:

1. Provide data indicating the percentage of post-industrial pozzolan (i.e. fly ash) cement substitution as a percentage of the full product composite by weight.

2. Provide data indicating the percentage of post-industrial and post-consumer recycled content aggregate in all unit masonry products.

3. Provide data indicating effective composite insulating values for all concrete units wall assemblies, including values for aerated concrete masonry units and insulated cores.

4. Provide product data for all mortar products indicating the percentage of post-industrial cement substitution as a percentage of the full mortar composition by weight.

5. Provide product data indicating the percentage of post-consumer recycled steel content in each type of steel reinforcement as a percentage by weight.

6. Provide product data stating the location where all unit masonry products were manufactured and where the raw materials were harvested, extracted or recovered.

7. Provide MSDS product information data showing that concrete adhesives, paints and coatings meet any environmental performance goals including low emitting, low volatile organic compound products (VOC).

PART 2 – PRODUCTS

2.3 CONCRETE MASONRY UNITS CMUS

B. Integral Water Repellent

Consider low solvent water repellent coatings for reduced toxicity and low emitting Volatile Organic Compounds (VOC).

Available Products:

1. American Formulating & Manufacturing

2. Conspec

3 Curecrete Distribution, Inc

4. Degussa Building Systems

5. Envirosafe Manufacturing Corporation

6. Palmer Industries, Inc.

7. Seal-Krete, Inc.

8. Weather-Bos International

C. Concrete Masonry Units: [ASTMC90] [UBCStandard21-4].

5. Consider lightweight or aerated concrete masonry units to decrease resource depletion, reduce transportation energy impact, and increase concrete unit masonry wall insulation values.

Available Manufacturers:

1. ACCOA Aerated Concrete Corporation

2. E-Crete

3. SafeCredt AAC

4. Texas Contec, Inc.

6 Consider specialty concrete masonry units with forms that minimize thermal bridging and provide integral core insulation systems.

Available Manufacturers:

1. Omni Block, Inc.

2. IMSI Block

2.7 MORTAR AND GROUT MATERIALS

B. Masonry Cement

Consider high percentages of cement substitution with post-industrial waste products such as coal fly ash (30%).

C. Mortar Pigments

Consider the use of natural clay or mineral based pigments.

Available Products:

1. Davis Colors.

2. Recycled Glass Powder Concrete Colorant

3. EnvironOxide Pigments

D. Colored Cement Product

2. Consider the use of natural clay or mineral based pigments.

E. Aggregate Mortar

3. Consider the highest percentage of recycled aggregate for all mortar mixes.

2.11 MISCELLANEOUS MASONRY ACCESSORIES

D. Weep/Vent Products

2. Cellular plastic Weep/Vent

Consider weep vents made with a high percent of recycled content.

Available Products:

Archovations Inc.

3. Mesh Weep/Vent

Consider mesh weep products that are made with a high percentage of recycled content

Available Products:

Mortar Net USA, Ltd.; Mortar Net Weep Vents.

2.12 INSULATION

Consider specialized concrete masonry units that are manufactured to work with insulation foam inserts to improve the thermal performance of wall construction.

Consider specification of loose-fill board insulation such as Polyisocyanurate and Expanded Polystyrene that does not use ozone-depleting blowing agents such as HCFC’s in their manufacturing. Consider products that do not use fire-retardant chemicals such as brominated flame retardants (HCBD). Also consider insulation products that are made with some recycled material content.