Cement-treated base (CTB) has provided economical, long-lasting pavement foundations for over seventy years. These structure have combined soil and/or aggregate with cement and water which is then compacted to high density.
The advantages of cement soil stabilization are many:
- Cement stabilization increases base material strength and stiffness, which reduces deflections due to traffic loads. This delays surface distress such as fatigue cracking and extends pavement structure life.
- Cement stabilization provides uniform, strong support, which results in reduced stresses to the sub-grade. Testing indicates a thinner cement-stabilized layer can reduce stresses more effectively than a thicker unstabilized layer of aggregate. This reduces sub-grade failure, pothole formation, and rough pavement surfaces.
- Cement stabilized bases have greater moisture resistance to keep water out; this maintains higher strength for the structure.
- Cement stabilization reduces the potential for pumping of sub-grade fines. 5. Cement stabilized base spreads loads and reduces sub-grade stress.
CTB is a cemented, rigid material that distributes load over a larger area due to its slab-like characteristics and high beam strength. CTB is practically impervious; it resists freezing/thawing cycles, rain or high ground water tables and spring weather damage. CTB continues to gain strength with age, even under traffic loading.