15313Materials for High Strength Concrete

Usually, the materials used for normal-strength concrete can be used to make high-strength concrete. However, for the aggregate to be used, it is better to choose a high-strength concrete if possible. The composition of high-strength concrete is different from normal-strength concrete. The maximum size of the aggregate is usually limited to 20 mm. The cement content is high (400 to 600 kg/m3). The limitation on the maximum aggregate size is to reduce the strength of the transition zone and to get a more homogeneous material. The higher cement content results from the limited maximum aggregate size and the need for workability under the smaller w/c ratio condition.

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