Waterproof Concrete

Waterproof Concrete

Waterproof Concrete

Waterproof concrete is normally an impermeable concrete. To obtain an impermeable concrete, a suitable particle size distribution curve must be generated and the capillary porosity should be reduced.

Measures to reduce the capillary porosity are as follows:

·     Reduction in w/c ratio

·     Additional sealing of the voids with pozzolanic reactive material The concrete curing process is another parameter affecting the water resistance.

Composition

Aggregate

·     Well graded particle-size distribution curve

·     Fines content of the aggregate kept low

·    Adjustment to the binder content is usually necessary to obtain a satisfactory fines content

Cement

·     Conformity with the minimum cement content according to EN-206

Additions

·     Use of pozzolanic or latent hydraulic additions

w/c ratio

·     Low w/c ratio to reduce the capillary porosity

Placing

·     A plastic to soft concrete is recommended to produce water proof concrete

·     Careful and correct compaction of the concrete is important

Curing

·     Immediate and thorough curing is essential