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    SECTION 04100

    MORTAR

   PART 1 - GENERAL

   1.01 SECTION INCLUDES

    A. Mortar and grout for masonry.

   1.02 RELATED WORK

    A. Section 01400 - Quality Control.

    B. Section 01410 - Testing Laboratory Services: Testing laboratory.

    C. Section 04270 - Glass Unit Masonry.

    D. Section 04300 - Unit Masonry System: Installation of mortar and grout.

    E. Section 08130 - Stainless Steel Doors and Frames: Grouting steel door frames.

   1.03 REFERENCES

    A. ASTM C94 - Ready-Mixed Concrete.

    B. ASTM C144 - Aggregate for Masonry Mortar.

    C. ASTM C150 - Portland Cement.

    D. ASTM C207 - Hydrated Lime for Masonry Purposes.

    E. ASTM C270 - Mortar for Unit Masonry.

    F. ASTM C387 - Packaged, Dry, Combined Materials, for Mortar and Concrete.

    G. ASTM C404 - Aggregates for Masonry Grout.

    H. ASTM C476 - Grout for Masonry.

    I. ASTM C780 - Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry.

    J. ASTM C1019 - Method of Sampling and Testing Grout.

    K. IMIAC - International Masonry Industry All-Weather Council: Recommended Practices and Guide Specifications for Cold Weather Masonry Construction.

    SUBMITTALS

    A. Submit product data under provisions of Section 01300.

    B. Submit test reports under provisions of Section 01400 and 01410.

    C. Submit test reports on mortar indicating conformance to ASTM C270 and C780.

    D. Submit test reports on grout indicating conformance to ASTM C476 and C1019.

    E. Submit manufacturer's certificate under provisions of Section 01300 that products meet or exceed specified requirements.

    F. Submit mortar materials under provisions of Section 01300.

   1.05 DELIVERY, STORAGE, AND HANDLING

    A. Deliver products to site under provisions of Section 01600.

    B. Store and protect products under provisions of Section 01600.

    C. Maintain packaged materials clean, dry, and protected against dampness, freezing, and foreign matter.

   1.06 ENVIRONMENTAL REQUIREMENTS

    A. Maintain materials and surrounding air temperatures to minimum 50 degrees F (10 degrees C) prior to, during, and 48 hours after completion of masonry work.

   1.07 MIX TESTS

    A. Test mortar [and grout] in accordance with Section 01400.

    B. Testing of Mortar Mix: In accordance with ASTM C780.

    C. Testing of Grout Mix: In accordance with ASTM C1019.

   - PRODUCTS

   2.01 PREMIX MORTAR

    A. Do not use premix mortar on this Project.

   2.02 MATERIALS

   Portland Cement: ASTM C150, Type I gray for concrete unit masonry and for glass unit masonry.

    B. Masonry Cement: Will not be permitted.

    C. Mortar Aggregate: ASTM C144, standard masonry type. Grading and color suitable for type of masonry, one source for entire project.

    D. Hydrated Lime: ASTM C207, Type S.

    E. Grout Aggregate: ASTM C404.

    F. Grout Fine Aggregate: Sand; 50 percent by volume.

    G. Water: Clean and potable.

   2.03 ADMIXTURES

    A. Antifreeze: Antifreeze admixtures will not be permitted.

    B. Water Repellent: Liquid type; Dry Block manufactured by W. R. Grace & Co., Cambridge, MA.

    C. Accelerator: Accelerator may be used only with approval of Engineer.

    D. Retardant: Retardant admixtures may be used only with approval of Engineer.

   2.04 MORTAR MIXES

    A. Mortar for Load Bearing Walls and Partitions: ASTM C270, Type S utilizing the Proportion Method to achieve 1800 psi strength.

    B. Mortar for Non-load Bearing Walls and Partitions: ASTM C270, Type S utilizing the Proportion Method to achieve 1800 psi strength.

    C. Mortar for Reinforced Masonry: ASTM C270, Type S utilizing the Proportion Method to achieve 1800 psi strength.

    D. Stain Resistant Pointing Mortar: One part Portland cement, 1/8 part hydrated lime, and two parts graded (80 mesh) aggregate, proportioned by volume. Add aluminum tristearate, calcium stearate, or ammonium stearate equal to 2 percent of Portland cement by weight.

   2.05 MORTAR MIXING

    A. Thoroughly mix mortar ingredients in quantities needed for immediate use in accordance with ASTM C270.

    B. Add admixtures when approved in accordance with manufacturer's instructions. Provide uniformity of mix and coloration.

    C. Do not use anti-freeze compounds to lower the freezing point of mortar.

    D. If water is lost by evaporation, retemper only within two hours of mixing.

    E. Use mortar within two hours after mixing at temperatures of 80 degrees F (26 degrees C), or two-and-one-half hours at temperatures under 50 degrees F (10 degrees C).

    F. Prehydrate tuckpointing mortar by thoroughly mixing ingredients dry then mixing again adding only enough water to produce a damp, unworkable mix which will retain its form when pressed into a ball. After keeping mortar in this dampened condition for one to two hours, add sufficient water to bring it to proper consistency, that is somewhat drier than conventional mortar.

   2.06 GROUT MIXES

    A. Bond Beams: 3000 psi strength at 28 days; mixed in accordance with ASTM C476 fine grout.

    B. Engineered Masonry: 3000 psi strength at 28 days; mixed in accordance with ASTM C476 fine grout.

   2.07 GROUT MIXING

    A. Thoroughly mix mortar ingredients in quantities needed for immediate use in accordance with ASTM C476 fine grout.

    B. Add admixtures in accordance with manufacturer's instructions. Provide uniformity of mix.

    C. Do not use anti-freeze compounds to lower the freezing point of grout.

   PART 3 - EXECUTION

   3.01 EXAMINATION

    A. Request inspection of spaces to be grouted.

   3.02 PREPARATION

    A. Plug clean out holes with block masonry units to prevent leakage of grout materials. Brace masonry for wet grout pressure.

   3.03 INSTALLATION

    A. Install mortar and grout to requirements of the specific masonry Sections.

    B. Work grout into masonry cores and cavities to eliminate voids.

    C. Do not displace reinforcement while placing grout.

    D. Remove grout spaces of excess mortar.

    END OF SECTION