Normal Setting, Polymer-Modified, Fiber-Reinforced, Structural Repair Mortar With Corrosion Inhibitors

Repairing new and old concretes.
A cement-based, microsilica and polymer-modified, fiber-reinforced restoration mortar with corrosion inhibitors.

High performance structural concrete repair.

Providing additional protection for steel reinforcements.

Maintenance & Repairing structural concrete & reinforcements

• Maintenance of industrial areas damaged by aggressive environment, acid rain, atmospheric pollution, etc.
• Repairing Structural concrete affected by corrosion of reinforcements in marine environments, bridges, harbours, dams, etc.
• Repair of concrete structures with carbonation process.
• Repairing concrete damaged by deicing-salts, freeze/thaw cycles, mechanical impacts, etc.
• Repairing Concrete affected by repeated loads.
• Repairing pre-fabricated concrete elements.

Waterproofing Cement-based Concrete Protective Coatings

NORMAL SETTING, POLYMER-MODIFIED, FIBER-REINFORCED, STRUCTURAL REPAIR MORTAR WITH CORROSION INHIBITORS

Description
MAXRITE 700 is a single component, cement-based, microsilica and polymer-modified, fiber- reinforced restoration mortar with corrosion inhibitors. It is specially designed for high performance structural concrete repair exposed to an aggressive environmental ambient and provides an additional protection of the steel reinforcements. Its long open time and thixotropy allow the repair of new and old concrete in a simple way, without the need for using any form work, applied manually or by mechanical means.

Application fields

• Maintenance of industrial areas damaged by aggressive environment, acid rain, atmospheric pollution, etc.
• Structural concrete repair affected by corrosion of reinforcements in marine environment, bridges, harbours, dams, etc
• Repair of concrete structures with carbonation process.
• Repair of damaged concrete by deicing-salts, freeze/thaw cycles, mechanical impacts, etc.
• Concrete repair affected by repeated loads.
• Repair of pre-fabricated concrete elements.

Advantages

• Corrosion inhibitors prevent corrosion against chlorides and aggressive corroding agents, extending considerably the service life of the structure.>
• Its open setting time allows the quick completation of the repair of large surfaces.
• Good chemical resistance in aggressive environmental ambient due to its microsilica content.
• Waterproof. Withstands freeze/thaw cycles.
• Offers high resistance to carbonation penetration.
• High adhesion to concrete and reinforcements. Does not require special primers. Loads are transmitted onto the repaired structure.
• High impact and mechanical strength. Long lasting repairs.
• Good thixotropy. Application in successive layers without slump or the need to use form work. Allows high thickness per layer.
• Easy workability and application. It can also be sprayed by wet method.
• Single component mortar. Only requires water for mixing and it is odourless, making it suitable for poor ventilated areas.

Application Instructions
Preparation of the surface
Remove all damaged and loose concrete in the repair area, clean cut the edges perpendicularly to a minimum depth of 5 mm. Expose all corroded reinforcement, removing all the concrete until the edges of the bars are not affected by rust. Remove concrete all around the reinforcement for an efficient cleaning and to surround it with a minimum thickness of at least 1 cm of MAXRITE 700.

Eliminate rust by wire brush, needle gun, sand or shot blasting, etc. For additional protection, an application of the oxide converter and protector MAXREST PASSIVE (Technical Bulletin Nº.: 12) can be used.

Prior to application of MAXRITE 700, dampen the exposed surface until saturated but do not leave free-standing water.


Mixing
MAXRITE 700 is mixed exclusively with clean water, free from contaminants, either manually or mechanically by low speed drill (400 – 600 ropm). One 25 kg bag or drum of MAXRITE 700 requires about 3,75 to 4,25 litres of water to achieve proper consistency of a repair mortar (16% ± 1%). For applications using pump or spray machines the mixing water can by increased up to 4,5 litres per bag. In any case these quantities are only indicative and should be checked depending on the desired consistency and the existing ambient conditions.


Application
For an optimum bonding prepare a slurry, mixing 5 parts of MAXRITE 700 with 1 part of water, mixing well until achieving a homogeneous consistency without any lumps. Apply the slurry using a MAXBRUSH type brush on the surface to be repaired and on the reinforcement bars, filling all voids and pores.

While the slurry is still fresh, start placing MAXRITE 700 with the consistency of a repair mortar and apply layers between 5 and 50 mm. thick. Place special attention in pressing with the trowel to prevent any air from being trapped. Mark the surface of each layer with the trowel to improve the adhesion of the following one, which can be placed after about 30 minutes. Shape the last layer as desired before the final hardening occurs.
Once the repair is finished it can be coated with cement-based coating MAXSEAL (Technical Bulletin Nº.: 01) or MAXSEAL FLEX (Technical Bulletin Nº.: 29), or acrylic-based coating MAXSHEEN (Technical Bulletin Nº.: 17) available in a wide range of colours.


Application Conditions
Do not apply below 5 °C or if lower substrate or ambient temperatures are expected during the 24 hours following the repair.

Curing
Under extreme conditions of wind or heat, lightly spray water over the repaired areas for at least an hour. It is also convenient to cover them during the first 24 hours if the temperature is above 30 ºC and the relative humidity is below 50%.

Cleaning
Tools and equipments should be cleaned immediately with water after use. Once it sets can only be removed by mechanical methods.

Consumption
Estimated consumption of MAXRITE 700 are approximately 1,85 kg/m² per mm. thickness. One 25 kg sack of MAXRITE 700 fills approximately 13,75 litres (0,54 l/ kg of product)

.Important Indications

If the slurry primer dries up, or the previous layer is completely set, apply a new slurry coat to continue the job. Do not use any MAXRITE 700 leftovers to prepare a new batch. Do not use mixing methods which cause violent mix and do not mix for prolonged periods. Do not use curing compounds on the repair. Do not exceed the thickness per layer in application. Do not exceed the amount of mixing water recommended. The setting time is measured at 20 ºC, higher temperatures reduce setting time and lower temperatures delay setting time. For any other application not specified in this technical bulletin consult our Technical Department.

Packaging
MAXRITE 700 is supplied in 25 kg. bags and drums.

Storage
Nine months in bags and twelve months in drums and cans, in their original unopened packaging, in a dry and covered place, protected from frost and humidity with temperature above 5 ºC.

Safety & health
MAXRITE 700 is non-toxic, but is an abrasive compound by its composition. Avoid eye and skin contact. Rubber gloves and safety goggles must be used during the application. In case of skin contact, wash affected areas with soap and water. In case of eye contact, rinse with clean water but do not rub. If irritation continues, seek medical attention. Safety Data Sheet of MAXRITE 700 is available by request. Disposal of the product and its empty packaging must be done according to national regulations by the final user.

Technical Data

Appearance and colour	Grey powder
Apparent density powder (kg/m3)	1,130 ± 50
Mixing water (% weight w/ prod.)	16 + 1
Pot life (minutes, 20 °C)	60
Apparent dry density (kg/m3)	2,140 ± 50
Setting time (minutes, a 20 °C) Beginning End	75 120
Flexural strength (MPa) 7 days 28 days	6,8 10,3
Compression resistance (MPa) 7 days 28 days	43,3 56,4
Capillarity (C) (g / dm2 min ½)	0,40
Dynamic modulus of elasticity (MPa)	30,000
Adhesion (MPa)	2,34

Tests, generally after 28 days
Mixing water: 15%

Guarantee
The information contained in this leaflet is based on our experience and technical knowledge, obtained through laboratory testing and from bibliographic material. DRIZORO reserves the right to introduce changes without prior price. Any use of this data beyond the purposes expressly specified in the leaflet will not be the Company´s responsibility unless authorised by us. The data shown on consumptions, measurement and yields are for guidance only and based on our experience. These data are subject to variation due to the specific atmospheric and jobsite conditions so reasonable variations from the data may be experienced. In order to know the real data, a test on the jobsite must be done, and it will be carried out under the client responsibility. We shall not accept responsibility exceeding the value of the purchased product. For any other doubt, consult our Technical Department.

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