Uni Grouts GP 50

Uni Grouts GP 50 is a ready-mixed, non-shrink, nonmetallic, flowable, high-strength structural grout. Uni Grouts GP 50 contains a balanced blend of washed and graded silica sands, portland cement, flow improvement compounds, and a shrinkage compensating system which produces a volume stable structural grout.

Uni Grouts GP 50 produces high early and ultimate strengths without intermediate or latent shrinkage. Uni Grouts GP 50 remains stable without failure from compressive loading, impact, lateral thrusts, high heat or continuous vibration. Plastic settlement and shrinkage are prevented by the shrinkage compensated mix design. Low mixing water demand results in the hardened grout giving good freeze-thaw stability, low water absorption plus resistance to oil, sea water and mild alkali attack. The grout is chloride free, can be safely used in contact with steel and can be placed in section thicknesses of 10mm up to 100mm.

Engineering Grouts

Uni Grouts GP 50 Uses

Uni Grouts GP 50 is used where non-shrink, highstrength, structural, durable grout is required such as: precise machine bases, pump and equipment bases, structural columns, machine tools, compressors, and anchor bolts.

Uni Grouts GP 50 Advantages

  • Prepacked, In factory ensures consistency in supply requires addition of water to develop a free flow, non shrinking and high strength gaining grout.
  • Material shrinkage is offset by expansion during green condition and later on by maintain original volume.
  • Self leveling by nature.
  • Easy placement and filling of underbosses of machinery.
  • Non metallic and chloride free.

Uni Grouts GP 50 Typical Properties

General purpose, non-shrink, free flow cementitious grout

Compressive Strength (BS 1881 : Part 116,1983 & ASTM C 1107) @ w/p ratio 0.19 (flowable)
Flowable W/P=0.19
1 15 N/mm²
3 25 N/mm²
7 32 N/mm²
28 48 N/mm²

Note : Cubes cast were kept under resistant before testing to simulate site condition. Size of the cubes used 70.6mm x 70.6mm x 70.6mm tested at 300C.

Unrestrained expansion 1 to 4%
0 Consistency Life 20 minutes @ 30 C
3 Density 2100 kg/m
Initial Setting Time Approx. 5 hrs.
Flow on Flow Table 17 to 24 cms.

Instruction for Uni Grouts GP 50 Use

High Performance Polypropylene Fibers For Concrete & Mortar

Surface Preparation

Formwork should be erected and made grout-tight. The formwork must be designed with sufficient hydrostatic head to ensure grout flow into and across the grouting area. Saturate the grouting area with water, check for leaks, leave for 1 hour and then blow out any surplus water.


Pour 4.75 litres of clean water into the mixing vessel for each complete bag of Uni Grouts GP 50. Slowly add the Uni Grouts GP 50 to the water whilst continually mixing. Mechanical mixing is preferable using either a high torque slow speed drill with a Grout Stirrer or a grout mixer set on a slow speed. (High speed or colloidal mixing will cause thixotropy leading to loss of flow).


Grout should be placed within 20 minutes after start of mixing. Continuous placing is important, pouring from one side of the formwork until the grout appears at the opposite side of the grouting area. Do not disturb once grouting has been completed. GP Grout may be placed at temperatures between 5°C and 45°C. Uni Grouts GP 50 can be placed in thicknesses up to 100mm in a single pour when used as an under plate grout. For thicker sections it is necessary to fill out Uni Grouts GP 50 grout with well graded silt free aggregate to minimize heat buildup. Typically a 10mm aggregate is suitable. 50 - 100% aggregate weight of Uni Grouts GP 50 can be added. Any bolt pockets must be grouted prior to grouting between the substrate and the base plate.


Placed grout which is exposed should be cured in accordance with good concrete practice including water spray and spray applied curing membrane.

Tools Cleaning

Tools and equipment can be easily cleaned with a clean water.


Uni Grouts GP 50 grout is supplied in 25 kg single lined HDPE bags.


One bag (25 kg.) of Uni Grouts GP 50 will yield 13.7 litres at flowable consistency.

Shelf Life & Storage

Uni Grouts GP 50 has a shelf life of 6 months from date of manufacture when kept at a temperature between 5 0C to 45 0C and store in the original, unopened bags. All material shall be stored under cover in a manner that will prevent damage preferable on pallets and protected from excessive heat and moisture. Do not freeze.

Health & Safety

Uni Grouts GP 50 is alkaline when mixed with water and should not come into contact with skin or eyes. Avoid inhalation of dust during mixing and wear safety glasses, dust mask and gloves. If skin contact occurs wash thoroughly with clean water. Should eye contact occur rinse immediately with plenty of clean water and seek medical advice. Full health and safety data is given in Product Safety Data Sheet.

Quality Assurance

Universal Construction Chemicals is a firm of Assessed Capability. The company's quality system conforms to ISO 9001:2015 certified.