What Is Grouting?
Grout is usually a mixture of cement, sand, and water or chemicals that are used to fill gaps. They are used in repairing concrete cracks, filling seams and gaps in tiles, gaps for sealing and waterproofing, and for soil stabilization.
It is also used to give additional strength to the foundations of load-bearing structures. The grating is basically a process of injecting a pumpable material into a structure to change its physical properties.
Resins are also sometimes used as grout materials. The grating is commonly used to fill cracks and voids in soil or rock.
Also, it is used to strengthen the soil and make it impermeable. Cracks are used in a variety of applications such as water repair, stopping in submerged structures such as canals, tunnels, etc., filling seams between tiles and stabilizing the soil.
Here we have given information about the type of grouts used in the repair of cracks.
Advantages of Grouting Include:
- This can be done on almost any ground condition.
- It does not induce vibration and can be controlled to avoid structural damage.
- Improvement in-ground structures can be measured.
- Very useful for limited space and low headroom applications.
- Used for slab jacking that lifts or levels the deformed foundation.
- It can be installed adjacent to existing walls.
- Can be used to control seepage, groundwater flow, and hazardous waste materials Process and its types.
Types of Materials Are Used for Grouting:
- Cement Grouting: Cement Grouting is the injection under pressure of cement or grout to fill voids or fractures in the soil, rock unit or concrete structure. Cement Grouting is a process by which cement is injected under pressure to fill fractures and voids in concrete structures.
- Chemical Grouting: Chemical grouting transforms granular soils into sandstone-like masses by filling the voids with a low viscosity, non-particulate grout. The chemical grout is injected under pressure through the ports. The grout permeates the soil and hardens, creating a sandstone-like mass.
- Bentonite Grouting: Bentonite Grout is a specially formulated sodium bentonite. It can be used for drilled hole abandonment, water well grout, sealing monitoring well casing or as a geothermal grout.
- Resin Grouting: Traditional grout is made from a cement based mix. It’s not waterproof and actually absorbs water when it becomes wet. It also absorbs stains easily, as anyone who has scrubbed grout will attest to. Epoxy grout on the other hand, is made of epoxy resins combined with a filler powder.
- Bituminous Grouting: Hot Bitumen Grouting is a special type of grouting where melted bitumen is used as grouting material. When hot bitumen is injected into medium saturated with water, it cools quickly at the interface, and turns from its fluid state to a highly viscous, tenaciously sticky, elasto-plastic state.
Type of Grouting
1. G1 Grouting
This type of grout is generally for steel structures, towers, ships, small pumps, and all non-vibrating machinery, but the precise application of the grout type to any location will be according to the relevant drawing.
The grout shall be a non-shrinking, free-flow cementless grout with a minimum compressive strength at least equal to the foundation concrete, but not less than 30 N / mm2 in 7 days and 40 N / mm2 in 28 days. Will be less than
2. G2 Grouting
This type of grout will be used, in general, in prefabricated concrete structures, compressors, and other heavy equipment subject to vibration and for column bearing plates of heavy structures.
The grout will be a proprietary non-compressible cemented high strength grout, e.g., FOSROC’s Conbextra GP2 ‘, Sikka and MC-Beauchemie Emcekrete or likewise approved by the EIC. Specific locations for the application will be shown in the diagram.
The minimum compressive strength of grout will be 50 N / mm2 in 7 days and 60 N / mm2 in 28 days.
The flexible strength of grout should exceed 9 N / mm2 in 28 days.
Experiment of Grouting
- Joints for grouting bearings, machine foundations, column joints in precast construction, etc.
- For grout anchors in concrete
- To grout cavities, gaps, and in concrete Usage
Characteristics of Grouting
- Not flammable, non-toxic
- Shrinkage compensated
- Process and its Specification
- Substrate preparation
- Able Adjustable Fixture
- Very good flow characteristics
- Excellent Bond to Concrete
- No segment or bleeding
- High final strengths
- Easy to use (ready to mix powder)
- Easy to mix, only add water
- Initial expansion by gas generation
- Impact and vibration resistant
Mixture of Grouting
For flowable: water : powder = 0.14 to 0.16 by weight (4.2 L to 4.8 liters of water per 30 kg bag).
For Por able: Water : powder = 0.12 to 0.14 by weight (3.6 L to 4.2 liters of water per 30 kg bag).
Mixing Time: – Minimum 3 minutes
Mixing Tools of Grouting
Mix the grout powder in the correct proportions with water with a low speed (maximum 500 rpm) electric drill so as not to put too much air.
Pour about 80 to 90% of the required water into the mixing drum, and then add the balance water.
Depending on the desired stability and flow properties, the mixing ratio can be adjusted. Do not use a solid tilt mixer.
Types of Grout for Ceramic Tile
There are four basic types of grout:
- Unsanded Grout:
- Finely Sanded Grout:
- Quarry TypeGrout:
- Epoxy Grout:
This is used for wall tiles where the grout joint is less than 1/8” wide.
Finely Sanded Grout
This is used for floor tiles where the joints are 1/8” to 3/8” wide.
- This is the same as finely sanded grout for ceramic tiles except that a coarser grade of sand is used.
- The quarry-type grout is used for joints that are 3/8” wide to 1/2” wide such as those used with Saltillo tiles.
- This consists of an epoxy resin and hardener.
- Epoxy grout for ceramic tile is highly resistant to stains and chemicals and has a tremendous bonding strength.
- It is ideal for countertops and other areas susceptible to stains.