In slabjacking can I use lime with the portland cement?
Grouts for restoring support to concrete pavement or floor panels by slabjacking usually contain four to five parts of fine sand or finely ground limestone and one part of portland cement with enough water for the consistency desired. Hydrated lime is often used instead of ground limestone. Flowability is one of the most important characteristics. Lime contributes to flowability. When sand is used the specifications may call for at least 30 percent to pass the number 200 sieve. Other specifications require ground limestone to have 100 percent passing the number 50 sieve and not less than 60 percent passing the number 200 sieve. If the mix is to be used for raising the slab it is usually made to a stiff consistency. If it is used primarily for filling voids it may be more fluid. Some specifications require a minimum strength for the grout mix. A common requirement is 300 psi although it may range from 150 to 3000 psi at seven days, as determined by compression tests on 6 by 12-inch cylinders.