The current paper reports the results of a research on the transport of chemical injection products in relatively small mortar/brick combinations. Since no easy to perform test method for small combined specimens, giving results within a short time, was available, a special test method was developed.
The effect of the interface between brick and mortar on the transport of the products was studied by the application of several injection products and creams. The tested products include pore filling and water repellent products and products in water as well as in organic solvent.
The obtained results show clear differences in spreading and effectiveness in the different substrates and between products in organic solvent and water based ones, as well as between creams and liquid products. The results show that water based products can easily be transported through the mortar joint, differently from what occurs with products in an organic solvent. This is the consequence of the different transport mechanisms of water based products and products in organic solvent in water filled pores.