High-flow, high-strength, non-shrink grout

Meets Specifications

Corps of Engineers Specification for non-shrink grout:CRD-C 621 – Grades A, B, C

ASTM C-1107 – Grades A, B, C Specification for non-shrink grout

ASTM C-827 – Unitex Multi-Purpose Grout yielded a controlled positive expansion

Description

Unitex Multi-Purpose Grout is a non-shrink, non-corrosive, non-metallic grout. It is formulated as a cement based product with high quality raw materials. Unitex Multi-Purpose Grout offers pumpability, heat and thermal shock resistance and provides controlled, net positive expansion.

Purpose

Unitex Multi-Purpose Grout is designed for interior and exterior grouting of precast concrete components, structural column base plates, pump and machinery bases, anchoring bolts, rebars, dowels, bearing pads, keyway joints and crane rails. It finds applications in paper mills, oil refineries, food plants, chemical plants, sewage and water treatment plants etc.

Advantages

Test Results

1 day .02%

3 days .03%

14 days .08%

28 days .09%

Compressive Strength

Application

Surface Preparation:
Thoroughly clean all contact surfaces. Existing concrete should be strong and sound.  Surface should be roughened to insure bond.
Metal base plates should be clean and free of oil and other contaminants.
Maintain contact areas between 45°F (7°C) and 90°F (32°C) before grouting and during curing period. For hot and cold weather applications, contact refer to . Thoroughly wet concrete contact area 24 hours prior to grouting, keep wet and remove all surface water just prior to placement. If 24 hours is not possible, then saturate with water for at least 4 hours. Seal forms to prevent water or grout loss. On the placement side, provide an angle in the form high enough to assist in grouting and to maintain head pressure on the grout during the entire grouting process. Forms should be at least 1" (2.5 cm) higher than the bottom of the base plate.
Mixing:
A mechanical mixer with rotating blades like a mortar mixer is best.
Small quantities can be mixed with hand tools. When mixing less than a full bag, always first agitate the bag so that a representative sample is obtained. Place approximately 3/4 of the anticipated mix water into the mixer, add the grout mix, adding the minimum additional water necessary to achieve desired consistency. For hot weather conditions (greater than 85°F [29°C]) mix with cold water (approximately 40°F [4°C]). For cold weather conditions (less than 50°F [10°C]) mix with warm water (approximately 90°F [29°C]).
Water Requirements:
Desired Mix Water per 50 lb. (22.7 kg) Bag
Dry Pack 5 pints(2.4L)
Flowable 8 pints(3.8L)
Fluid 9 pints(4.2L)
Mix for a total of five minutes ensuring uniform consistency. For placements greater in depth than 3" (7.6 cm), 25 lbs. of washed pea gravel (3/8" [1 cm] maximum size) must be added to each 50 lb. bag of grout. The approximate working time (pot life) is 30 minutes. This will vary somewhat with ambient conditions.
Placement:
Grout should be placed preferably from one side of grout box to avoid entrapping air pockets. Grout should not be over-worked or over-watered causing segregation or bleeding. Vent holes should be provided where necessary. When possible, grout bolt holes first.
Placement and consolidation should be continuous for any one.
section of the grout. When nearby equipment causes vibration of the grout, such equipment should be shut down for a period of 24 hours.