Soil-Cement Frequently Asked Questions

  • Because there is no noticeable color change, how can I tell how deep my roadway materials were treated with cement?

  • For base material, is there a cost advantage in using a cement-treated base over an unbound graded aggregate base?

  • How does cement slurry compare with lime slurry?

  • How exactly does a pugmill work to blend materials together for CTB?

  • How soon can a newly constructed cement-stabilized roadway base—whether a cement-treated base (CTB) or a full-depth reclamation (FDR) base—be opened to traffic?

  • Is it less expensive to rehabilitate an entire roadway through FDR using cement rather than removing and replacing the roadway?

  • Is there a general "rule of thumb" about how much water to use in soil-cement?

  • Is there a test procedure to determine how much portland cement to use for a given FDR pavement project?

  • I've heard that improperly constructed soil-cement bases have a tendency to crack due to shrinkage. Is there a process that can be used to help minimize this problem?

  • Should the acceptance criteria of completed soil-cement be based on compressive or flexural strength test results of in-place cores or beams?

  • What are the different types of soil-cement materials?

  • What is micro-cracking (or pre-cracking) of cement-treated bases?

  • Which product is better—portland cement or hydrated lime—in stabilizing clay soils?