Mapei Mapegrout T40

Technical Characteristics

Mapegrout T40 is a premixed powdered mortar composed of cement, graded aggregates and special additives manufactured from a formula developed in the MAPEI Research Laboratories.

When mixed with water Mapegrout T40 forms an easy to apply thixotropic mortar that can be applied without slumping even in substantial thicknesses on vertical surfaces without formwork.

When fully cured, Mapegrout T40:

• has moderate flexural and compressive strength;
• has a modulus of elasticity, thermal expansion coefficient and permeability coefficient similar to that of medium quality concrete;
• is waterproof
• has excellent adhesion to existing concrete surfaces provided they are saturated with water and reinforcing bars are first treated with Mapefer or Mapefer 1K.

If Mapegrout T40 is prepared by only adding water, it must be cured under damp conditions in order to guarantee that the product’s expansive properties develop completely and correctly. However, it is not very easy to guarantee that these conditions are created on site. Therefore, to guarantee that the expansive properties of Mapegrout T40 take place when drying in the open air, 0.25% of Mapecure SRA, a special additive which has the property of reducing both plastic and hydraulic shrinkage, may be used to great advantage by adding it to the mix. Mapecure SRA has a very important role to play, in guaranteeing better curing of mortar. Also, when mixed with Mapegrout T40, it may be considered a technologically advanced system, in that the additive has the capacity of slowing down evaporation of the water and of promoting the development of hydration reactions. Mapecure SRA behaves like an internal curing agent and, thanks to its interaction with some of the main components which make up the cement, it helps to reduce shrinkage by between 20% and 50% compared with the standard values of the product without the additive. This will obviously lead to a reduced risk of cracking. Mapegrout T40 meets the requirements defined by EN 1504-9 (“Products and systems for the protection and repair of concrete structures - Definitions, requirements, quality control and evaluation of conformity - General principles for the use of products and systems”) and the minimum requirements claimed by EN 1504-3 (“Structural and non structural repair”) for structural mortars of class R3.

Mapegrout T40 meets the requirements of AS/NZS 4020:2005. (Eurofins| ams Report Reference No.1609354).

Application procedure

The mortar can be applied with a trowel or gauging trowel without formwork even on vertical surfaces or ceilings in maximum thicknesses of 30 to 35 mm per layer.

Mapegrout T40 can also be spray applied, using Turbosol or Putzmeister type equipment, excluding continuous mixing machines

Reinforcing bars must be previously treated with Mapefer or Mapefer 1K before applying the Mapegrout T40. Where necessary, apply a second layer of Mapegrout T40 before the previous layer has finished setting (within 4 hours at +23°C).

After completing repair work, the surfaces may be skimmed with Monofinish, Mapefinish, Planitop 200 or with an elastic skimming product such as Mapelastic or Mapelastic Guard.

Coloured Elastocolor Paint may then be applied to create a protective finish

• Degraded building façade in need of repair
• Spray application of Mapegrout T40
• Finishing of Mapegrout T40
• Repairing a balcony with Mapegrout T40

Cleaning

Mortar that has not yet hardened can be removed from tools with water. After setting, cleaning is very difficult and can only be done mechanically.