| | | | | implemented like this. This is not painting! Brushes |
| Cementitious brushable, waterproofing slurries are of | | | | should be pressed firmly, slowly and consistently. The |
| general use. Hundreds of tons of these products are | | | | construction is going to face hydrostatic pressures! |
| used every day for waterproofing of basements, | | | | |
| reservoirs etc. | | | | 5) Inadequate consumption. This has to do with the |
| These products are also widely used for | | | | former mistake. You cannot do waterproofing with |
| waterproofing on the negative side. | | | | 1,5-2kg/m2 of cementitious products total consupmtion!. |
| Today we will see together 6 fatal mistakes that could | | | | Normally 2,5-5kg/m2 are needed depending on the |
| render these products more or less ineffective. | | | | hydrostatic head. |
| | | | | |
| Six fatal mistakes in the application of cementitious | | | | 6) Maybe the most severe fatal mistake is that |
| waterproofing slurries. | | | | these products are not cured properly. These products |
| | | | are so delicate and fragile that need a sedulous curing |
| | | | care! They need our help! Imagine the situation in |
| | | | Greece with 35oC and a breezing sun! It's a technical |
| | | | | crime to leave these products helpless! |
| | | | |
| 1) Deficient cleaning and preparation of the substrate. | | | | What to do? |
| These products need thorough and minute preparation | | | | |
| (please check the relative articles on this website). | | | | |
| | | | | |
| 2) Not thorough substrate wetting. Surfaces to be | | | | Firstly use an SBR on acrylic latex to increase water |
| treated should be satiated with water (avoid though | | | | retention in outdoor applications. |
| stagnant water). | | | | Secondly,make provision for the thorough curing of the |
| | | | | product for at least 24 hours. The best way to cure |
| 3) Wetting is also imperative between successive | | | | cementitious slurries is to provide them with a fine mist |
| layers. | | | | of water every 4-5 hours. |
| | | | | Take some care and your cementitious waterproofing |
| 4) Never exceed the recommended by the | | | | will reward you richly! |
| manufacturer water mixing proportions. The temptation | | | | |
| for the technicians is always great.A little more water | | | | |
| = much better workability. Though, more water means | | | | Chris Strogilis |
| porous, weak waterproofing layers prone to failure. | | | | |
| This treatment is a structural intervention and should be | | | | Civ. Eng. |