INSTALLATION:
						Ceramic,  Mosaic, Quarry, Paver,
						Slate, Marble and Granite

SPECIFICATION				MAPECEM
Fast–Curing Hydraulic Binder for Concrete Screeds

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DESCRIPTION:  An exceptional resin-based hydraulic binder containing distinctive chemical ingredients which, when mixed proportionately with graded aggregates and water hardens completely within the first 24 hours following the installation regardless of the thickness of the screed; promoting a shrinkage-free finished concrete topping with high mechanical strength even in the most unfavorable conditions.  When it is properly used, the residual moisture content after 24 hours is less than 2.5%.  MAPECEM is used like any ordinary PORTLAND cement mixed in a normal fashion with sand and aggregates properly graded and sized in relation to the dried thickness of the finished topping.

Specify for the construction of floating and bonded thick-bed concrete leveling coats suitable to cover old and new concrete floor surfaces when fast-drying, fast-curing floor preparation is needed for an almost immediate installation of wood, PVC, linoleum, ceramic tile or any type of floor covering material.

Specify for the construction of fast-curing interior concrete screed which can be open to foot traffic 3 to 4 hours after installation.

Specify for the construction of interior concrete slabs ready to accept most ceramic tile and natural stone installations after only 3to 4 hours.

Specify for the construction of concrete leveling screeds which will dry and cure completely in 24 hours, ready to receive wood parquet and resilient floor covering even when these are installed with standard water emulsion adhesives.

Specify for the construction of a reinforced floating concrete slab, 13/8” (35mm) thick or more over a cleavage membrane or cleavage plane.

Specify for the construction of bonded concrete screeds 3/8” (10mm) to 1 3/8” (35mm) thick. In this case, specify a MAPECEM/PLANICRETE 50 slurry bond coat.

Specify over well-supported, structurally solid plywood, presswood, chipboard, masonite, asbestos board, steel or similar dimensionally unstable substrates, install a polyethylene sheeting or tar paper cleavage membrane over the entire substrate and apply a MAPECEM wire mesh reinforced floating screed at least 1 3/8” (35mm) thick or thicker.

Specify for patching and repairs of interior or exterior concrete slabs in areas where minimum downtime is essential:  supermarkets, hospitals, air terminals, shopping malls etc.

Specify for the construction of concrete heating floors with built-in heating elements.

Specify as a good slurry adhesives for concrete when mixed proportionately 1:1 with PLANICRETE 50 latex additive.

	DO NOT specify MAPECEM with other cements, lime, plaster or other similar materials.

DO NOT specify MAPECEM for areas that will be subjected to deicing salt conditions.

DO NOT specify MAPECEM for patching or leveling concrete substrates requiring less than 3/8” (10 mm) correction.  For such work, specify LEVEL/PATCH, ULTRA/PLAN MB or GRANI/RAPID (see data sheets)

DO NOT  specify MAPECEM on substrates subject to hydrostatic pressure or where a moisture problem exists.  Specify an effective vapor barrier to screeding.

DO NOT specify MAPECEM for “ready mix” trucks or carrying long distances because of its short setting time.  MAPECEM must always be mixed on site.

When specifying MAPECEM in the Tile Selection selected – ceramic, mosaic, quarry, paver, slate, marble or granite – add appropriate articles or paragraphs under the applicable PART as indicated.

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PART 1 GENERAL

	REFERENCES

ANSI A108.1B – Installation of Ceramic Tile in a Cured Portland Cement Mortar Setting Bed with Dry-Set or Latex Portland Cement Mortar.

ASTM C-33 – Standard Specification for Concrete Aggregates

ANSI A137.1 – Specification for Ceramic Tile

The Tile Council of America (TCA) –Handbook for Ceramic Tile Installation	

SUBMITTALS

Product Data: Submit manufacturer’s technical information and installation instructions for materials required.

	QUALITY ASSURANCE
	
Provide tile, grout and setting materials from one source.  Additives, dry-set mortars, installation materials and grouts shall be from the same manufacturer.

	DELIVERY, STORAGE AND HANDLING
	
Deliver and store packaged materials in original containers with seals unbroken and labels intact until time of use.  Prevent damage or contamination to materials by water, freezing, foreign matter or other causes.

Deliver and store materials on site at least 24 hours before work begins.

Provide heated and dry storage facilities on site.

	PROJECT CONDITIONS

Maintain environmental conditions and protect work during and after installation to comply with referenced standards and manufacturer’s printed recommendations.

Vent temporary heaters to exterior to prevent damage to tilework from carbon dioxide build-up.

Maintain temperature at not less than 50 degrees F (10 degrees C) in tiled areas during installation and for 7 days after completion, unless higher temperatures are required by referenced installation standards or manufacturer’s  written instructions.

PART 2 PRODUCTS
 
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Select screed to be used and delete non-applicable method
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	MORTAR MATERIALS
	
[MORTAR SCREED:  MAPECEM, resin-based hydraulic binder, as manufactured by MAPEI CORPORATION.  Agreed conformity to ASTM C-33, and water.]
		
[CONCRETE SCREED:  MAPECEM, resin based hydraulic binder as manufactured by MAPEI CORPORATION.  Aggregate conforming to ASTM C-33, pea gravel and water.]
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When specifying MAPECEM  in performance specification, Call MAPEI CORPORATION’s Technical Service Department toll-free number for assistance with product characteristics.

When specifying MORTAR MATERIALS, refer to respective suggested mortar specifications- KERALASTIC, KERAPLY or PLANICRETE 50 with KERABOND dry-set mortar when specifying LATEX-PORTLAN  CEMENT MORTAR, ANSI A118.4 (see respective specification sheets).

When specifying GROUT MATERIALS, refer to respective suggested grout specification – ULTRA/COLOR sanded polymer-modified cementitious grout or KER 200 polymer-modified Portland cement tile grout or KER 800 unsanded polymer-modified Portland cement tile grout (ANSI A118.6), or KERAPOXY 100% Solids Epoxy Grout (ANSI A118.3). ).  Grout tiles according to grout instructions and ANSI A108.10 or A108.6 specifications.

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MIXES

Proportion and mix screed in accordance with manufacturer’s printed instructions.

PART 3 EXECUTION

INSPECTION

Verify substrate surface is ready to receive work of this Section.  Do not proceed with work until surfaces and conditions comply with manufacturer’s requirements.

INSTALLATION

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Select screed installation method and delete non-applicable method.
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Install [mud screed] [concrete screed] in accordance with manufacturer’s printed instructions and ANSI A108.1B.

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Select appropriate TCA method to be used and delete non-applicable methods (select from latest edition of TCA Handbook).
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[Floor Tile: Install in accordance with TCA method.  [F101], [F103], [F11], [F112], [F121], [F125], [F132], [F134], [F141].]

	[Refrigerator Room Tile:  Install in accordance with TCA method R612.]

	[Steam Room Tile:  Install in accordance with TCA method SR613.]

	[Shower receptor:  Install in accordance with TCA method [B414], [B415], {TR418]

	[Stair Tile:  Install in accordance with TCA method S151.]

[Thresholds, saddles, window stools:  Install in accordance with TCA method [WS610], [TH611].]

	Do not wet cure the fleshly applied screed.
	
When surface grinding is required, this may be done more easily when the screed has cured sufficiently to support the weight of the equipment but before it has reached a final cure.  Generally, the final polishing and grinding may be done about 1 hour after installation.
	
At the perimeter of the floor, around columns, pillars and elevated bases, leave at least a 3/8” (10mm) gap and fill in with cardboard, polystyrene, cork or any such compressible material.

Install control joints lengthwise and crosswise at regular intervals according to needs and/or specifications.

Install expansion and control joints in accordance with TCA method EJ171.

Grout joints shall be clean and free from standing water, dust and foreign substances.

Tile surfaces shall be clean and dry.	

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Specify FILED QUAITY CONTROL for the moisture content in the finished slab when specifying the resilient floor covering or water sensitive floor covering materials such as green marbles, marble agglomerates, wood, linoleum, etc.
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	[FIELD QUALITY CONTROL
	
Use a calcium carbide hygrometer to measure the moisture content of the screed.  Moisture content must not exceed 2.5% in screed before covering.] 

PROTECTION

Protect floors at least 24 hours or until the moisture content of the screed is less than 2.5% (maximum) before installing a reliant floor covering or surfacing materials.

Protect floors for ceramic tile installation, generally after 3-4 hours the screed is sufficiently dry to accept the installation of ceramic tiles.

A cured MAPECEM screed may become very dense.  Check the water absorption of the screed by the water droplet test method in order to choose the appropriate adhesive for bonding the floor covering material.  A very dense screed may require the use of a reactive adhesive for the installation of a water sensitive floor covering.

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When dealing with cement-based products, it should be noted that temperature and humidity during and after installation of tile affect final curing time, i.e., low temperatures (60 degrees and under) and high humidity (70% and above) will delay final cure time.
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For further information and assistance, contact:

				     MAPEI CORPORATION
				     1501 WALL STREET
				     GARLAND, TEXAS  75041 – 4046
				     1-800-992-6273