MC-Bauchemie MC-Grout 300
A factory-blended, non-shrink cementitious precision grout from MC-Bauchemie for machine bases, anchor bolts and structural bearings where full contact and dependable load transfer decide the job.
What is it?
A ready-to-use, non-shrink cementitious precision grout supplied dry in bags, available in fluid and stiff consistencies. You add only clean water on site.
Where is it used?
Under machine base plates, structural columns, bridge and crane bearings, precast connections and around anchor bolts where a dense, void-free seat is essential.
Why use it?
It fills completely without settlement, develops high early and 28-day strength, and transfers load evenly across the full bearing area instead of a few high spots.
How is it applied?
Mix with the specified water in a forced-action mixer, then pour or pump from one side into a pre-soaked, formed cavity so the grout flows through and displaces air.
About MC-Bauchemie MC-Grout 300
MC-Grout 300 is MC-Bauchemie’s factory-blended precision grout, engineered for the moment when a machine, a bearing or a column has to sit on concrete and stay put under load. It arrives as a controlled dry blend of graded aggregates, cement and shrinkage-compensating additives, so the only variable left on site is the water you add. That matters on Indian projects where site-batched sand-cement grouts vary bag to bag and gang to gang. With MC-Grout 300 the mix design is already locked in, which is why consultants specify it for plant foundations, substation equipment, turbine and pump bases, and bridge bearing pads.
The grout is offered in two consistencies from the same family. The fluid grade self-levels under base plates through gaps of roughly 10 to 100 mm, seeking out every corner without vibration. The stiffer, form-and-pour grade handles deeper pours up to around 300 mm, which is where the 300 in the name comes from. Both share the defining trait of a precision grout: they do not shrink back as they cure. Ordinary grouts lose volume, pull away from the plate edge and leave the load resting on a shrinking island of contact. MC-Grout 300 holds its volume, so the bearing surface you pour is the bearing surface you keep.
The technical insight
The behaviour that separates a precision grout from ordinary mortar is what happens to volume during the first hours and days. Plastic-stage settlement and drying shrinkage both shrink a normal grout away from the plate it is meant to support, and the load then concentrates on whatever high points remain in contact. MC-Grout 300 counters this with a shrinkage-compensating system built into the factory blend, so the grout expands slightly against its confinement rather than pulling in. The result is positive, continuous contact under the full base plate. Grading is equally deliberate: the aggregate is sized and proportioned so the fluid grade flows freely at a low water demand, typically 13 to 15 percent by weight, roughly 3.25 to 4.0 litres per 25 kg bag. Keeping water low keeps the water-cement ratio down, which is what drives both the high early strength (on the order of 25 N/mm2 at one day) and the dense, low-permeability matrix that resists oil, water and freeze-thaw over the life of the foundation.
Where it is used
- Seating machine and equipment base plates on plant and factory foundations
- Grouting anchor bolts and holding-down bolt pockets
- Bedding bridge, crane and structural bearings for even load transfer
- Filling connections and joints in precast concrete construction
- Deeper form-and-pour void filling up to roughly 300 mm using the stiff grade
- Seating column bases, stanchions and steel structures onto concrete plinths
- Grouting pump, compressor and turbine foundations subject to dynamic load
- General repair pours where a dense, non-shrink cementitious fill is required
Key advantages
- Non-shrink behaviour keeps full plate contact instead of pulling away at the edges
- Factory-blended, so on-site variability is limited to the water you add
- High early strength allows faster load application and quicker commissioning
- Fluid grade self-levels under plates without vibration, reaching tight corners
- One product family covers both thin fluid pours and deeper form-and-pour work
- Dense, low-permeability matrix resists oil, water and weathering on exposed bases
- Only clean water and a mixer are needed; no epoxy metering or hot-work
- Consistent, specifiable strength for consultant-approved structural applications
Limitations & considerations
- Cementitious, not epoxy; for severe chemical attack or heavy vibration an epoxy grout is the correct choice
- Strength and flow depend on water dosage; over-watering to ease placing weakens the grout and can cause bleed
- Needs a formed, sealed cavity and pre-soaking of the substrate, which adds preparation time
- Must be poured from one side only to displace air; pouring from multiple points traps voids
- Placing and curing outside roughly 10 to 40 C requires hot- or cold-weather precautions
- Not intended as a thin skim, feather-edge or decorative topping; respect the minimum and maximum pour depths
Selection & best practice
Build a leak-tight formwork with a pour side and a head box, leaving 25 to 50 mm clearance so the grout can flow across and rise. Saturate the concrete substrate for several hours and remove standing water before you start, so the dry concrete does not rob the grout of its mixing water. Mix mechanically with a forced-action or slow-speed paddle mixer using the lower end of the water range first, adding the balance only up to the specified figure; never exceed it to make placing easier. Pour continuously from one side and let the grout push air ahead of it to the far side, keeping a head of grout in the box to maintain flow. Do not vibrate the fluid grade. As soon as the surface stiffens, cut back exposed edges and start wet curing with damp hessian and polythene, keeping the grout moist for the manufacturer’s recommended period so early strength develops without surface crazing.
Specifications
| Product type | Non-shrink cementitious precision grout (fluid and stiff grades) |
| Base | Factory-blended cement, graded aggregate and shrinkage-compensating additives |
| Compressive strength (28 days) | Greater than 50 to 60 N/mm2 (grade dependent) |
| Early strength | Approximately 25 N/mm2 at 1 day, 40 N/mm2 at 3 days |
| Flow (fluid grade) | Greater than 250 mm on flow table; self-levelling |
| Water demand | Approx. 13 to 15% by weight, about 3.25 to 4.0 litres per 25 kg bag |
| Application depth | Fluid 10 to 100 mm; stiff form-and-pour up to approx. 300 mm |
| Setting time (at 20 C) | Initial approx. 3 to 4 hours; final approx. 6 to 9 hours |
| Pack size | 25 kg bag |
Industry use cases
Manufacturing and process plant
Seating pump, compressor, motor and turbine base plates so dynamic loads transfer evenly and machinery holds alignment over its service life.
Power and substations
Grouting transformer, switchgear and generator foundations and their holding-down bolts where dependable, non-shrink support is critical.
Bridges and infrastructure
Bedding structural, crane and bridge bearings, giving uniform contact across the bearing area for correct load distribution.
Precast and steel structures
Filling precast connections and grouting steel column base plates and stanchions onto concrete plinths and pockets.
Industrial construction and repair
Deeper form-and-pour void filling and structural repair pours using the stiff grade where a dense, high-strength cementitious fill is specified.
Frequently asked questions
What is the difference between the fluid and stiff grades of MC-Grout 300?
How much water do I add per bag?
Is MC-Grout 300 a substitute for an epoxy grout?
What compressive strength does it reach?
Do I need to vibrate it during placing?
Does Space Arc supply MC-Grout 300 in Delhi NCR and pan-India?
How we position MC-Bauchemie MC-Grout 300
MC-Grout 300 sits in the everyday-workhorse tier of cementitious grouting: it covers the vast majority of machine bases, anchor bolts and bearing seats where a reliable, non-shrink, specifiable grout is needed. Within MC-Bauchemie’s own range, step up to the MC-DUR epoxy grout line when the foundation faces aggressive chemicals, high dynamic vibration or requires a thin, ultra-high-strength bed, and look at MC-Bauchemie’s mineral-based micro-concrete (Emcekrete family) when the job is structural concrete repair rather than plate seating. Across our other brands we can also offer equivalent free-flow cementitious grouts from Fosroc and Sika where a project specification names them. Speak to us if you are unsure whether cementitious or epoxy is the correct call for your load, gap and exposure.
Fosroc Conbextra GP2 — Specify the Fosroc option when the project or consultant has standardised on Conbextra GP2, or when you want a free-flow non-shrink grout from the Fosroc range already approved on the site.
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