Concrete Lifting FAQs

General Concrete Lifting Questions

• What kind of applications can concrete raising equipment be used for?
• What is concrete raising?
  
• What kind of material can a I pump?

How to Become a Concrete Raising Contractor

• How can I learn to raise sunken concrete?
• What do I need to start a concrete raising business?
• How can I expand my business to include concrete lifting?
• Do you offer franchises?
• Do you offer financing?

Sidewalks

  Driveways

Patios

Commercial Entrances

Industrial Concrete Raising

Industrial Void Filing

Curb & Gutter
City Streets

Highway Projects

City Sidewalks

Bock Wall Core Filling

Bridge Approach
Void Filling

Shotcrete Application

What is Concrete Raising?
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, raising concrete 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.  There are two types of concrete lifting, polyurethane and traditional mudjacking.

What kind of material can I pump?

Polyurethane concrete lifting uses material specifically designed to fill voids and raise concrete.  Available for purchase directly from HMI, the reaction of this two part material expands with enough force to fill voids and raise concrete. 

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

All HMI 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.

How can I learn to raise sunken concrete?
HMI offers 2 Day Training Seminars that focus on teaching you what you need to know to successfully run a concrete lifting business.  Explore the different options you have in equipment, learn business operation best practices, and get the marketing guidance you need to start your concrete raising business.

Mudjacking
Material loading area, storage, and equipment

Polyurethane Concrete Lifting
Indoor storage for totes/barrels
Dolly or pallet jack to move material

How can I expand my business to include concrete lifting?
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.

What if I have questions about my concrete lifting 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.

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.