Batimix Mortar 642

Description

BATIMIX Mortar 642 is a pre-packaged fast-setting mortar for repair applications. It is made from Portland cement, silica fume, carefully-graded sand, and selected additives such as set-accelerating, plasticizing, and shrinkage-compensating.

Main Purpose

BATIMIX Mortar 642 is a structural repair material for partial and full-depth repairs. It is recommended for the rehabilitation of concrete structures, which have to be ready-for-use within short periods of time. Typical applications include parking structures, ramps, garages, bridge decks, commercial floors, warehouses, and others.

Features

BATIMIX Mortar 642 has the following characteristics:

• Easy to use, suitable for both interior and exterior works
• Rapid setting for quick repairs (open for light foot traffic in less than 3 hours)
• High early compressive strength without added chlorides
• Reduced bleeding and segregation
• High degree of adhesion/bond to the repaired structure\
• Low water absorption, yet increased water vapor transmission

Properties

• Appearance : powder
• Bulk density : approx. 1.43
• Grain size : 0 to 2 mm (upon request, this product can be made with bigger maximum aggregate size)
• Length change of hardened mortar (ASTM C 157): - 0.09 %
• Compressive strength at 1 and 28 days (ASTM C 109): 38.4 and 46.8 MPa
• Bond strength by slant shear at 7 days (ASTM C 882): 17.5 MPa
• Pull-off strength against concrete at 28 days (EN 1015-12): 0.95 MPa
• Water permeability after 48 hours (EN 1015-21): 0.54 ml/cm²

Health and Safety

BATIMIX Mortar 642 contains a mixture of cement and silica fume that is irritating to the eyes and skin. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Wear suitable gloves. For further information, kindly refer to Material Safety Data Sheet.

Directions for Use

Substrate preparation: BATIMIX Mortar 642 must be applied on sound and thoroughly cleaned substrates free of oil, dust, loose particles, and paints. The traces of mould joints must be leveled. All surfaces should be saturated with water (SSD condition) prior to application.

Product preparation: A 25-kg bag of BATIMIX Mortar 642 should be mixed with 3.5 to 4.25 liters of clean water. The mixing should be done with a medium-speed mechanical mixer until obtaining a consistent homogenous material. The mixing time should not exceed 2 minutes, as the mortar may loose its workability very rapidly.

Application: Because of its fast setting characteristics, BATIMIX Mortar 642 can be placed under all temperature conditions. However, in warm weather, cold water can be used to cool mortar temperature. The product should be discharged from the mixer and placed immediately without any delay. Pumping is to be avoided because of the fast setting characteristics.

BATIMIX Mortar 642 must be thoroughly worked in the forms so that they are entirely filled and the reinforcing bars adequately surrounded. The average consumption rates vary from 14 to 18 kg / m² / cm, depending on the method of application and type of substrate. All placement and finishing operations should be completed within 10 minutes at 23 ºC from the time of contact of the powder mortar with water.

Protection and curing: Freshly deposited BATIMIX Mortar 642 must be protected from excessively hot or cold temperatures and maintained with minimum moisture loss. Curing should begin immediately after the finishing operations for a minimum of 3 days using absorptive mats which must be kept continuously wet. Alternately, appropriate sheet materials or curing compounds conforming to ASTM C 171 / C 309 can also used. Curing compounds can be purchased separately from Holderchem.

Specifications / Compliance with Standards

BATIMIX Mortar 642 is in conformity with all current requirements of ASTM C 928 Grade R3 for Standard specification for packaged, dry, rapid-hardening cementitious materials for concrete repairs.

Storage

BATIMIX Mortar 642 shelf life is six months from the production date if well stored in a closed dry place. Avoid freezing and excessive temperatures.

Packages

• 25 kg paper bag