Cement modification of subgrade has been widely practiced for the past few decades.
Recently, cement has become a more economical binder to modify in-situ subgrade soil
since other binders, such as fly ash, have become less available and therefore their prices
have increased significantly. In addition, a much higher percentage of fly ash needs be
used, when compared with cement to achieve the same subgrade strength and stiffness. In
general, cement-modified subgrade is prone to develop shrinkage cracking, which can …