Knowde Enhanced TDS
Identification & Functionality
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Advantages
- Reaches initial set in 60 to 90 minutes at 72°F (22°C) at maximum water level, 40 to 50 minutes at minimum water level
- Able to be finished earlier with better results when used as a horizontal patching mortar
- Extremely versatile, for fast turnaround, use for horizontal repairs or as a form and pour mortar to repair vertical columns and overhead beams.
- Contains migrating corrosion inhibitor for superior protection of structural rebar
- Superior flow and pumpability in form and pour applications
- Repairs from 0.50 inch (1.3 cm) to full depth
- Non-shrink with exceptional bond strength
- May be placed at temperatures down to 20°F (-6.7°C) if ACI 306 cold weather concreting standards are followed
- Resists freeze-thaw cycles and deicing chemicals.
- May be extended for economical placement at depths greater than 1.5 inches (4 cm)
Applications & Uses
- Markets
- Applications
- Application Area
- Compatible Substrates & Surfaces
- Uses
- Structural filling holes subject to heavy traffic including concrete decks, bridges and roadways
- Full-depth patching of horizontal concrete
- As a flowable and pumpable mortar for form & pour repairs to columns, spans, barriers, etc.
- Directions
For horizontal patching repairs at depths greater than 1.5 in (3.8 cm), an aggregate extension is required.
SURFACE PREPARATION:
Horizontal Repairs: Saw cut edges of area to be repaired to a minimum depth of one inch. Square cut sides for optimum performance and appearance. Do not cut the reinforcement.
Form & Pour Repairs: Erect forms around area to be repaired to a minimum depth of one inch. Remove all unsound concrete to be replaced along with all contaminants including dust, dirt, oil, grease and asphalt. Any exposed reinforcing steel should be cleaned to bright metal. Consult project engineer to determine if use of a bonding agent similar to Polyweld EPXCI is recommended. If a bonding agent is not specified, saturate prepared area with clean, potable water. Remove any puddles or standing water immediately before placing mortar so that concrete is in a saturated surface-dry (SSD) condition.
MIXING
Mortar Mixer: Use a paddle type mortar mixer equipped with rubber tipped blades for blending ChemSpeed 75 ES. Start the mortar mixer. Before beginning first batch, pre-wet the blades and bucket with clean water, then pour out the water. Pour 2 quarts (1.9 liters) of clean, potable water per bag into the mortar mixer first, then add ChemSpeed 75 ES and mix 3 to 5 minutes until mixture is thoroughly wetted out and uniform in texture. If needed, slowly add additional water (not to exceed 2.5 quarts or 2.4 liters in total) to achieve desired placement and finishing characteristics for horizontal patching.Single Bags: Single bags of ChemSpeed 75 ES may be mixed using a heavy duty ½” drill and paddle mixer.
For patches from 0.5 to 1 inch deep, ChemSpeed 75 ES may be used neat. For deeper repairs, add up to 30 pounds (13.6 kg) of clean, hard, SSD 3/8 inch (0.95 cm) pea gravel per bag to the mixing water prior to adding the ChemSpeed 75 ES. Mix mortar for 3 min-utes. Mortar should be uniform in texture with pea gravel evenly dispersed. Do not mix more mortar than can be placed and finished in 30 minutes.
APPLICATION:
The application range for ChemSpeed 75 ES is from 20° to 85°F (-7° to 29°C). Follow ACI recommended concreting practices for hot and cold weather.
Horizontal Repairs: After removing all standing water from the area to be patched, thoroughly scrub in a thin layer or bond coat onto the surface with a stiff bristled broom or brush. Do not dilute the bond coat. Do not apply more bond coat than can be covered with mortar before the bond coat dries. Do not re-temper the bond coat. After the bond coat, immediately place Chem-Speed 75 ES mortar into prepared area. Carefully tamp and compact mortar under reinforcing steel, into corners and around edges, filling voids and eliminating air pockets. ChemSpeed 75 ES should be placed at full depth rather than in lifts or layers. Screed to grade. ChemSpeed 75 ES is designed to have a float or broom texture.
Form & Pour: After removing all standing water from the repair area, ChemSpeed 75 ES may be placed into forms, ensuring all voids are completely filled. Gently tamp or vibrate form exterior for best results.
Curing: If ChemSpeed 75 ES will not be top-coated, wet cure for a minimum of 1 day followed by an appli-cation of a curing compound that meets ASTM C309 or ASTM C1315. ChemMasters produces a wide range of curing compounds and curing & sealing products that meet these specifications. If ChemSpeed 75 ES is to be top-coated with an epoxy or methyl methacrylate coating, allow ChemSpeed 75 ES to cure for 8 hours at 72°F (22°C) before priming or coating. If the ChemSpeed 75 ES is to be coated with a polyester or vinyl ester coating, allow 24 hours of cure at 72°F (22°C) prior to priming. Ensure that the ChemSpeed 75 ES is prepared per the coating surface preparation instructions prior to coating application. ChemMasters produces a wide range of polymer coatings and toppings for floors. Contact your ChemMasters’ representative for ad-ditional information.
Technical Details & Test Data
- Limitations
- At temperatures over 90°F (32°C), cool the mix-ing water and bags to extend working time. Cover with wet burlap after placement to cool surface until final set is achieved.
- In cold weather, below 50°F (10°C), warm the material and water to result in a 70°F (21°C) mixed temperature and preheat the area to be patched.
- Cover patches with insulating materials in cold ambient temperatures below 40°F (5°C).
- Do not featheredge. Minimum depth is 0.5” (1.3cm).
- Technical Data
Estimating Guide Yield per bag 0.42 ft3 (0.012 m3)
With 60% extension 0.60 ft3 (0.017 m3)
Test Formulation Material ChemSpeed 75 ES
Mixing Conditions 73°F @ 50% relative humidity
Batch Dates: September 2015 Water Addition Rate: 2.0 to 2.5 quarts per 50 lbs of ChemSpeed 75 ES
Curing: Air Cure, 50 % relative humidity @ 73°F
Where Extended: 50 lbs ChemSpeed 75 ES with 30 lbs 3/8” ssd pea gravel
Test Results (Plastic) ASTM C109
Flow@ 5 minutes: 102%
@ 15 minutes: 93%ASTM C1611
Slump Flow Extended23 in ASTM C191
Set Time (Vicat)Initial: 48 minutes
Final: 58 minutesTest Results (Chemical) AASHTO T105: Sulfate
Sulfate Content (SO3)
Sulfate Content (SO4)1.57%
1.88%ASTM C1218:
Water Soluble Chloride0.004% * Material extracted from cast cylinder cured 28 days before testing. Test Results (Hardened)
ASTM C109 Compressive Strength (psi)
Average of three 2 inch cubes1 day 7 day 28 day 6,420 9,880 13,110 Compressive Strength of Hydraulic Cement Mortars ASTM C157 Length Change (%)
Average of three 3x3x11 1/4” specimens
Compared to initial readings at 24 hours Air Cure
Length Change of Hardened Hydraulic Cement Mortar & Concrete1 day 7 day 28 day -0.018 -0.063 -0.116 ASTM C157 Length Change (%)
Average of three 3x3x11 1/4 “ specimens
Compared to initial readings at 3 hours Water Cure
Length Change of Hardened Hydraulic Cement Mortar & Concrete1 day 7 day 28 day 0.004 0.01 0.019 ASTM C348 Flexural Strength (psi)
Average of three 40 x 40 x 160 mm specimens1 day 7 day 28 day 1,044 1,557 1,638 Flexural Strength of Hydraulic Cement Mortars ASTM C469 Compressive Modulus of Elasticity (psi)
Average of three 4 x8” cylinders1 day 7 day 28 day 3.56 x 106 3.91 x 106 4.71 x 106 Static Modulus of Elasticity and Poisson’s Ratio of Concrete in Compression ASTM C496 Splitting Tensile Strength (psi)
Average of three 3 x 6” cylinders1 day 7 day 28 day 298 542 666 Splitting Tensile Strength of Cylindrical Concrete Specimens ASTM C39 Compressive Strength (psi)
Average of three 3 x 6” cylinders1 day 7 day 28 day 2,880 5,570 7,960 Compressive Strength of Cylindrical Concrete Specimens ASTM C531 Linear Shrinkage and
Coefficient of Thermal Expansion
Average of four 1 x 1 x 10” specimens7 day 28 day Coefficient of Thermal Expansion
-0.03% -0.04% 6.6 x 10-6 in/in/°F
Linear Shrinkage and Coefficient of Thermal Expansion of Chemical- Resistant Mortars, Grouts, Monolithic Surfacing,
and Polymer ConcretesASTM C666 Freeze Thaw Resistance : Procedure A
Average of three 3 x 3 x 11 1/4” specimens
Air cured until 28 days before testing. 300 cyclesDurability Factor Mass Loss Surface Condition
97.1 0.60% Slight scaling Resistance of Concrete to Rapid Freezing and Thawing ASTM C672 Salt Scaling (lbs/ft2)
Average of two 8 x 10 x 4” specimensScaling Loss @ 25 Cycles Scaling Loss @ 50 Cycles 0.0 lbs/ft2 Rating 0
No Scaling0.0 lbs/ft2 Rating 0
No ScalingScaling Resistance of Concrete Surfaces Exposed to deicing Chemicals ASTM C1583 Direct Bond Strength (psi) Average of three 2” diameter cores
Material applied at a 2” thickness over 4,500 psi sandblasted concrete1 day 7 day 28 day 156 215 363 Tensile Strength of Concrete Surfaces & the Bond Strength or Tensile Strength of Concrete Repair and Overlay Materials by Direct Tension (Pull-off Method) ASTM C1202 Rapid Chloride Permeability (coulombs)
Average of two 2x4” specimens28 day <800 Very Low Electrical Indication of Concrete’s Ability to
Resist Chloride Ion PenetrationASTM C882 Slant Shear Bond Strength (psi)
Average of three 3 x 6” specimens cast per ASTM C9281 day 7 day 28 day 2,218 3,354 3,408 Bond Strength; of Epoxy-Resin Systems Used
With Concrete by Slant ShearM-DOT Direct Shear Bonding Strength (psi)
Average of three bonded specimens
Bonded 1“ thick over 4 “ concrete cube1 day 7 day 28 day 227 310 401 Direct Shear Bonding Test
Packaging & Availability
- Packaging Type
- Packaging
Packaging Container lbs / kg Pallet Item# Moisture proof bags 50 / 22.7 60 F2035.50
Storage & Handling
- Storage
Cover unopened bags and store on pallet in a cool, dry area. Shelf life of properly stored material is 18 months from date of manufacture.