040513 va - Masonry Mortaring ques 12.pdf
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- Solicitation number
- 36C25221B0012
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This pre-solicitation notice provides details for a construction project to replace an air handling unit at the Jesse Brown VA Medical Center in Chicago, Illinois. The project is set aside for Service-Disabled-Veteran-Owned Small Businesses and involves providing all tools, materials, components, labor and supervision to replace the failed S10C air handling unit that serves the Vascular, SCM and Urology areas of the facility. The contractor must also move air handling service for Urology to the S10B unit and provide any other required trades work. The solicitation will be issued on April 9, 2021 with bids due on June 8, 2021. The project value is estimated between $1,000,000 to $2,000,000. The pre-bid site visit will be detailed in the solicitation and the work must be completed within 291 calendar days of receiving a notice to proceed.
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100% Bid Documents S10C AHU Replacement
Jesse Brown VA Medical Center
Chicago, Illinois
VA Project No: 537-18-142
04 05 13 - 1/2
MASONRY MORTARING
VA Master Specifications 10-17
SECTION 04 05 13 - MASONRY MORTARING
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes:
1. Masonry mortar installed by masonry sections.
PART 2 - PRODUCTS
2.1 MATERIALS
A. Hydrated Lime: ASTM C207, Type S.
B. Aggregate for Masonry Mortar: ASTM C144 and as follows:
1. Light colored sand for mortar for laying face brick.
2. White plastering sand meeting sieve analysis for mortar joints for pointing except that 100 percent passes No. 8 sieve, and maximum 5 percent retained on No. 16 sieve.
3. Test sand for color value according to ASTM C40/C40M. Sand producing color darker than specified standard is unacceptable.
C. Masonry Cement: ASTM C91/C91M. Type N, S, Or M.
1. Use white masonry cement whenever white mortar is specified.
D. Pigments: ASTM C979/C979M; inorganic, inert, mineral pigments only, unaffected by atmospheric conditions, nonfading, alkali resistant, and water insoluble.
E. Water: Potable, free of substances that are detrimental to mortar, masonry, and metal.
2.2 MIXES
A. Masonry Mortar: ASTM C270, Type N.
1. Admixtures:
a. Do not use mortar admixtures, and color admixtures unless approved by Contracting Officer's Representative.
b. Do not use antifreeze compounds.
B. Colored Mortar:
1. Maintain uniform mortar color for exposed work, throughout.
2. Alteration Work Mortar Color: Match existing mortar.
100% Bid Documents S10C AHU Replacement
Jesse Brown VA Medical Center
Chicago, Illinois
VA Project No: 537-18-142
04 05 13 - 2/2
MASONRY MORTARING
VA Master Specifications 10-17
PART 3 - EXECUTION
3.1 PREPARATION
A. Examine and verify substrate suitability for product installation.
B. Protect existing construction and completed work from damage.
3.2 MIXING
A. Measure ingredients by volume using known capacity container.
B. Mix for 3 to 5 minutes in a mechanically operated mortar mixer.
C. Mix water with dry ingredients in sufficient amount to provide a workable mixture which will adhere to vertical surfaces of masonry units.
D. Mortar Stiffened Because of Water Loss Through Evaporation:
1. Re-temper by adding water to restore to proper consistency and workability.
2. Discard mortar reaching initial set or unused within two hours of mixing.
E. Pointing Mortar:
1. Mix dry ingredients with enough water to produce damp mixture of workable consistency retaining shape when formed into ball.
2. Allow mortar to stand in dampened condition for 60 to 90 minutes.
3. Add water to bring mortar to a workable consistency before use.
END OF SECTION 04 05 13
File details come from the government source that posted it. Updated .