Mudjacking FAQs

What you have always wanted to know about mudjacking & HMI equipment.

General Mudjacking Questions

What kind of applications can mudjacking equipment be used for?
What is Mudjacking?
Can I pump pea gravel or aggregate?
What kind of material can a I pump?

How to Become a Mudjacking Contractor

How can I learn to mudjack sunken concrete?
What do I need to start a mudjacking business?
How can I expand my business to include mudjacking?
Do you offer franchises?
Do you offer financing?

Hydraulic Mudpumps Inc. Services

What if I have questions about my mudjacking equipment after it is purchased?
What if I have questions about equipment applications or pricing?
Can HMI mudjacking equipment be purchased and shipped internationally?
Why is HMI slabjacking equipment better then any other slabjacking manufacturer?

What kind of applications can mudjacking equipment be used for?

Residential

Sidewalks

Driveways

Patios

Commercial

Commercial Entrances

Industrial Concrete Raising

Industrial Void Filing

Municipal

Curb & Gutter
City Streets

Highway Projects

City Sidewalks

Specialty Applications

Bock Wall Core Filling

Bridge Approach
Void Filling

Shotcrete Application

For any questions about mudjacking equipment applications please contact HMI.

What is Mudjacking?
Also known as slabjacking or pressure grouting, mudjacking is the process of pumping material under a sunken slab of concrete to lift it. Other uses include joint stabilization or filling voids to support the weight of a concrete slab. On residential, commercial, and municipal levels, mudjakcing is a cost effective alternative to replacing concrete typically saving 30-50%. The best way to recycle concrete, mudjacking will avoid the cost of demolition, removal and landscaping.

Can I pump pea gravel or aggregate?
All of our slabjacking pumps are designed to pump a 3/8” minus pea gravel concrete. We recommend that the mix design be at least an 8 bag mix with 400 to 600 pounds of pea stone. This mix design can vary depending on the coarseness and shape of the pea stone and sand that is used.

What kind of material can I pump?
The term mudjacking comes from using topsoil mixed with cement (mud). However, topsoil has organic properties which will eventually break down which may cause the concrete slabs to resettle. The most readily available material though out the country is agricultural lime mixed with cement and water. Other slabjacking materials are pond sand, river sand, lime screenings, and fly ash.

How can I learn to mudjack sunken concrete?
Come to our Wisconsin facilities to train with one of our experienced mudjacking crews. Get on-the-job training that is needed from our vetran mudjacking crew leaders. Once you actually see mudjacking work being done, you can understand how a concrete slab reacts when mud is pumped underneath it.

What do I need to start a mudjacking business?
It takes 5 basic pieces of equipment to start a mudjacking business: a mud pump (grout pump), a paddle type material mixer, a drill, a hand held concrete saw along with a means to carry the equipment and material to the job site.

How can I expand my business to include mudjacking?
Mudjacking is a great add-on business to any existing contracting business. HMI can provide you with the equipment, training, and back-up to make any expansion successful.

Do you offer franchises?
HMI offers technical support, training at our facility, advertising consulting and services. HMI only sells equipment for the opportunity to start your own slabjacking business, but do not offer franchise opportunities.

Do you offer financing?
Financing to get your mudjacking business started is available through a third party institution.

What if I have questions about my equipment after it is purchased?
Technical support is available Monday-Friday from 7:00AM-5:00PM. HMI also supplies a detailed parts and service manual with each piece of mudjacking equipment.

What if I have questions about applications or pricing?
Support is available Monday-Friday from 7:00AM-5:00PM. We are staffed with people who have actual on the job experience with mudjacking. They can answer questions and solve issues with troublesome jobs or how to bid on a certain concrete raising or void filling project.

Can HMI equipment be purchased and shipped internationally?
Yes, we have shipped slabjacking equipment all over the world. Just call or email our Wisconsin office for more information at 1-800-626-2464 or info@mudpumps.com.

Why is HMI equipment better then any other slabjacking manufacturer?
HMI has been setting the standard for mudjacking since 1974. Not only do we manufacture the equipment, HMI uses and tests it on a daily basis. Perfecting the standard and innovating tomorrow’s advances.