Our materials are designed for strength, durability, and a unique design touch, adapting perfectly to the needs of project implementers.
RESICEM 748 is a mono-component, selected quartz inert and polymer-based pre-packaged cement mortar.
It is thixotropic, fibre-reinforced and with shrinkage reducing admixtures.
It is resistant to sulphates.
RESICEM 748 is particularly suitable to restore concrete because it structurally adheres to it and it does not display shrinkage phenomena. It is a pre-mixed system that only requires water to be added as per the ratio shown on the sheet.
Mortar prepared with RESICEM 748 has the following features:
• excellent adhesion to supports, concrete and reinforcing rods;
• high mechanical resistance;
• it does not contain chlorides and iron elements which may eat into the metal armours of the concrete;
• resistant to sulphates;
• hand or plastering machine applicable, easy to prop up and fast to float-finish;
• applicable vertically with thicknesses from 0.5 to 3 cm;
• resistant to antifreeze salts;
| Property | Value |
|---|---|
| Compression strength (24 h) | 18–20 MPa |
| Compression strength (3 days) | 30–35 MPa |
| Compression strength (7 days) | 45–48 MPa |
| Compression strength (28 days) | 60–65 MPa |
| Bending strength (24 h) | 4 MPa |
| Bending strength (3 days) | 7 MPa |
| Bending strength (7 days) | 10 MPa |
| Bending strength (28 days) | 11 MPa |
| Elastic modulus | 28000 MPa |
| Adhesion to concrete (28 days) | > 2 MPa |
| Density | 2.10 kg/dm³ |
| Mix ratio (A + Water) | 100 + 16 |
Support preparation
The support must be healthy, compact, clean, oil and fat stain-free: remove corroded or decayed concrete through bush-hammering, sandblasting or other suitable method until you get to the intact support.
Metal armour at sight must be white metal sandblasted (SA2 – SA3 degree) and protected with RESICEM 715 carefully applied in two coats: if it is not possible to sand-blast, use metal brushes.
Preparation of the product and application
Firstly, pour ¾ of required water in the mixer o in the bucket and add RESICEM 748 when shaking:
mix at low speed to avoid excessive air intake for 3-4 minutes and then add the remaining water.
We do not recommend mixing by hand and partially using the package.
Let the mixture settle for a few minutes before application.
Abundantly wet the support. For better adhesion of new filling layers we recommend roller or brush
laying of RESIRIPRESA 902, acryl-cement cod shut casting on which, layer upon layer, RESICEM 748 mortar is applied.
Apply by hand or with plaster sprayer for the thickness required. Do not exceed 2 – 3 cm at a time and compact, smoothen and hand-float.
Notes
Application temperature from +5°C to + 35°C.
After applications during the summer season, keep surfaces wet for perfect curing of the filling material applied.
Keep the surface of the mortar applied wet for at least 24 hours.
Apply RESICEM 748 within 30 minutes from mixture; the product starts setting after approx.
5 hours. The product can be walked on after 18 hours and can be subject to mechanical stress after 3 days; full hardening occurs after 28 days.
Consumption
With a 25 kg bag, use 4 ℓ of water; approximately 13 ℓ of mortar can be obtained (yield of a bag)
from this mixture. Consumption for 1 cm thickness is about 19 kg/m2.
Packaging and storage
Available in packs of 5, 10 and 20 ℓ.
In original and closed packages, the product remains unchanged for at least 6 months if it is kept in
an environment with a temperature between 10 and 30 °C.
Do not expose containers to frost, heat sources and sunlight.
RESICEM 748 is used to:
• Restore concrete structures and reconstruct the concrete cover;
• structural reinforcement of masonry;
• settling superficial defects on horizontal and vertical structures;
• restoration of concrete in stacks, beams, plankings, bridge joints and railways and road viaducts;
• restoration of concrete in galleries, tanks, channels, bridges, dams, etc.;
• mending of prefab elements;
• packaging of structural screeds;
• packaging of plasters with high resistance to carbonation features.