G&W-URH

Product Description

G&W–URH is an ultra rapid hardening and shrinkage compensating cement mortar for concrete roads, bridge deck surfaces and joint edge emergency repairs.

Application

1. Concrete Roads
2. Bridge Decks
3. Joint Edges
4. Harbor Floors

1. Mixing equipment: Hand mixer, electrical power mixer.
2. Gauge: Scales.
3. Application equipment: Recommended hopper (when pouring), trowel.

1. When circumstance require it can withstand traffic after 3 hours
2. High adhesion with existing concrete.
3. High durability and weatherability material for civil construction.
4. Low temperature workability >41°F

Test Results

Test Methods : ASTM C 1439, ASTM C 109, ASTM C 579, ASTM E 154, ASTM C 157
ASTM D 968, ASTM D 3980

Test Item	Test Result
Bond Strength (N / cm2)	3 hours	6 hours	24 hours
	157	172	221
Compressive Strength (N / cm2)	3 hours	6 hours	24 hours
	1,750	2,710	2,850
Bending Strength (N / cm2)	3 hours	6 hours	24 hours
	600	690	1,200
Absorption Ratio (%)	1 hour	5 hours	24 hours
	0.23	0.25	0.26
Permeability Ratio (%)	0.4
Coefficient of Thermal Permeability ( /¡É)	15.5 ×10-6
Drying Shrinkage Ratio (%)	0.03
Abrasion Resistance Ratio (%)	0.5
Abrasion Resistance Ratio (%)	No Effect

Mixing Ratio

RE-URH Mortar
Type A	Type B
1 kg	0.16~0.20kg

Directions

1. Measure 1 lb of Type A and .095-.105 lb of Type B in each container.
2. The amount of Type B may vary depending on temperature and humidity.
3. Mix Type A and B sufficiently and apply as soon as possible.
4. Dampen concrete surface with water or Type B before application to ensure that concrete does not wick away moisture from mortar mixture in hotter weather.

1. A sufficient curing is required under the temperature below 50°F.
2. In case of any condensation on surface, dry the surface using heater, fan, air compressor or portable burner.
3. In case of hot-weather concreting on dried surface, spray the refined water or liquid to prevent the mortar from being rapidly dried.
4. Limit the amount of mixed material at normal temperature that which can be applied within 30 minutes.
5. Do not use if powder hardens or liquid freezes.
6. No application shall be allowed at the temperature below 31°F and over 95°F.
7. As the viscosity varies depending on temperature and humidity, keep agitating to prevent the aggregate from being segregated in a low viscosity, and add Type B within a mixing ratio allowable before agitating the material in a high viscosity.
8. Protect the surface from external impact and arrange not to be exposed to rain or direct sunlight at least for 3 hours after application.
9. When being used as expansion joint material, protect with vinyl or cloth.
10. Take into consideration that temperature of environment affects open time and strength in application.

1. Refer to instruction on storage of powder or liquid-type material for further details. If problems persists, contact the manufacturer.

1. Those not instructed in specifications may follow standard concrete specifications.
2. In the event of any discrepancies between the specification and work environment, consult the manufacturer or designer before application.