ABSTRACT
There are two fundamental distinctions between conventional-strength and high-strength concrete technology. First is the exchange in the relative strength and stiffness properties between paste and aggregate. On the low end of the strength spectrum, aggregate particles are bound by a weaker, more porous material. On the high end, aggregate particles are bound by a stronger, dense material. Going from conventional-strength to high-strength concrete technology is tantamount to turning a composite material inside out. The second distinction centers on the properties of the interfacial transition zone. Bond strength and degree of stiffness compatibility between binder and aggregate is critically important with high-strength concrete.
