36C24219B0058-0003006.pdf

Renovation of 9B for Surgery and Diagnostic Care Line Project No. 528A7-19-704

Department of Veterans Affairs – Syracuse VAMC 100% Specifications – 06/10/19

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SECTION 09 05 16

SUBSURFACE PREPARATION FOR FLOOR FINISHES

PART 1 - GENERAL

1.1 DESCRIPTION

This section specifies subsurface preparation requirements for areas to receive the installation of ALL flooring. This section includes removal of existing floor coverings, floor leveling and repair as required.

1.2 RELATED WORK

A. Section 07 92 00, JOINT SEALANTS.

B Section 09 65 19, RESILIENT TILE FLOORING Section 09 67 23.50, RESINOUS

(Epoxy Terrazzo) FLOORING (RES-5)

1.3 SUBMITTALS

A. Product Data:

1. Underlayment Primer

2. Cementitious Self-Leveling Underlayment

1.4 DELIVERY AND STORAGE

A. Deliver materials in containers with labels legible and intact and grade-seals unbroken.

B. Store material to prevent damage or contamination.

1.5 APPLICABLE PUBLICATIONS

A. Publications listed below form a part of this specification to the extent referenced. Publications are referenced in text by basic designation only.

B. American Society for Testing and Materials (ASTM):

D638-10

(2010) Test Method for Tensile Properties of Plastics

D4259-88

(2012)

Standard Practice for Abrading Concrete to alter the surface profile of the concrete and to remove foreign materials and weak surface laitance.

C109/C109M

-12

(2012)

Standard Test Method for Compressive Strength of

Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube

Specimens) Modified Air Cure Only

D7234-12

(2012)

Standard Test Method for Pull-Off Adhesion Strength of

Coatings on Concrete Using Portable Pull-Off Adhesion

Testers.

E96/E96M -

(2012)

Standard Test Methods for Water Vapor Transmission of

Materials

F710-11

(2011)

Standard Practice for Preparing Concrete Floors to

Receive Resilient Flooring

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F1869-11

(2011)

Standard Test Method for Measuring Moisture Vapor

Emission Rate of Concrete Subfloor Using Anhydrous

Calcium Chloride

F2170-11

(2011)

Standard Test Method for Determining Relative Humidity in

Concrete Floor Slabs Using in situ Probes

C348-08

(2008)

Standard Test Method for Flexural Strength of Hydraulic-

Cement Mortars

C191-13

(2013)

Standard Test Method for Time of Setting of Hydraulic

Cement by Vicat Needle

PART 2 - PRODUCTS

2.1 MOISTURE REMEDIATION COATING – NOT USED

2.2 CEMENTITIOUS SELF-LEVELING UNDERLAYMENT

A. System Descriptions:

1. High performance self-leveling underlayment resurfacer. Single component, self-leveling, cementitious material designed for easy application as an underlayment for all types of flooring materials.

It is used for substrate repair and leveling.

B. Products: Subject to compliance with applicable fire, health, environmental, and safety requirements for storage, handling, installation, and clean up. Gypsum-based products are unacceptable.

C. System Characteristics:

1. Wearing Surface: smooth

2. Thickness: Ranging from feathered edge to 1”, per application.

Applications greater than 1” require additional 3/8” aggregate to mix or as recommended by manufacturer.

D. Underlayment shall be calcium aluminate cement-based, containing

Portland cement. Gypsum-based products are unacceptable.

E. Compressive Strength: Minimum 4100 psi in 28 days in accordance with

ASTM C109/C109M.

F. Flexural Strength: Minimum 1000 psi in 28 days in accordance with ASTM

C348

G. Dry Time: Underlayment shall receive the application of floor coverings in 16 hours.

H. Primer: compatible and as recommended by manufacturer for use over intended substrate

I. System Components: Manufacturer's standard components that are compatible with each other and as follows:

1. Primer:

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a. Resin: copolymer

b. Formulation Description: single component ready to use.

c. Application Method: Squeegee and medium nap roller.

All puddles shall be removed, and material shall be allowed to dry, 1-2 hours at 70F/21C.

d. Number of Coats: (1) one.

2. Grout Resurfacing Base:

a. Formulation Description: Single component, cementitious self-leveling high-early and high-ultimate strength grout.

b. Application Method: colloidal mix pump, cam rake, spike roll.

1) Thickness of Coats: Per architectural scope, 1” lifts.

2) Number of Coats: More than one if needed.

c. Aggregates: for applications greater than 1inch, require additional 3/8” aggregate to mix.

2.3

PART 3 - EXECUTION

3.1 ENVIRONMENTAL REQUIREMENTS

A. Maintain ambient temperature of work areas at not less than 16 degree C

(60 degrees F), without interruption, for not less than 24 hours before testing and not less than three days after testing.

B. Maintain higher temperatures for a longer period of time where required by manufacturer's recommendation.

C. Do not install materials when the temperatures of the substrate or materials are not within 60-85 degrees F/ 16-30 degrees C.

3.2 SURFACE PREPARATION

A. Existing concrete slabs with existing floor coverings:

1. Conduct visual observation of existing floor covering for adhesion, water damage, alkaline deposits, and other defects.

2. Remove existing floor covering and adhesives. Comply with local, state and federal regulations and the RFCI Recommended Work

Practices for Removal of Resilient Floor Coverings, as applicable to the floor covering being removed.

Property Test Value

Compressive Strength

ASTM C109/C109M

2,200 psi @ 24 hrs

3,000 psi @ 7 days

Initial set time

Final Set time

ASTM C191

30-45 min.

1 to 1.5 hours

Bond Strength

ASTM D7234

100% bond to concrete failure

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B. Concrete shall meet the requirements of ASTM F710 and be sound, solid, clean, and free of all oil, grease, dirt, curing compounds, and any substance that might act as a bond-breaker before application. As required prepare slab by mechanical methods. No chemicals or solvents shall be used.

C. General: Prepare and clean substrates according to flooring manufacturer's written instructions for substrate indicated.

D. Prepare concrete substrates per ASTM D4259 as follows:

1. Dry abrasive blasting.

2. Wet abrasive blasting.

3. Vacuum-assisted abrasive blasting.

4. Centrifugal-shot abrasive blasting.

5. Comply with manufacturer's written instructions.

E. Repair damaged and deteriorated concrete according to flooring manufacturer's written recommendations.

F. Verify that concrete substrates are dry.

G. Prepare joints in accordance with Section 07 92 00, JOINT SEALANTS and material manufacturer’s instructions.

H. Tolerances: Subsurface shall meet the flatness and levelness tolerance recommended by the floor finish manufacturer. Tolerance shall also not to exceed 3/16” deviation in 10’. As required, install underlayment to achieve required tolerance.

I. Other Subsurface: For all other subsurface conditions, such as wood or metal, contact the floor finish or underlayment manufacturer, as appropriate, for proper preparation practices.

3.3 MOISTURE REMEDIATION COATING: NOT USED

3.4 CEMENTITOUS UNDERLAYMENT:

A. Install cementitious self-leveling underlayment as required to correct surface defects, floor flatness or levelness corrections to meet the tolerance requirements as detailed in the specifications, provide a smooth surface for the installation of floor covering.

B. Mix and apply in accordance with manufacturer's instructions. Apply self-leveling underlayment without cold joints. The entire floor shall be continuous.

3.5 PROTECTION

A. Prior to the installation of the finish flooring, the surface of the underlayment should be protected from abuse by other trades by the use

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3.6 FIELD QUALITY CONTROL

A. Where specified, field sampling of products shall be conducted by a qualified, independent testing facility.

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