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EPO HARDENER -B45 (Natural)

EPOHARDENER CEMENT BASED HARDENER WITH QUARTZ ADDITIVE FOR CONCRETE SURFACES

Product description

Cement based powder mix with quartz additive, containing modified polymers. Ready for application concrete surface hardener to be applied  as powder onto freshly laid concrete surfaces to be used for heavy vehicle and motor truck traffic.

The product conforms to the requirements of AZS 039-2000 (TS 11140-1993), GOST 10181-76, GOST 28013-98, and TS AZS 31 43498-05-2005 standards.

Fields of Application

This surface hardener may be applied in the following areas:

indoor and outdoor areas, on horizontal surfaces;

floorings of industrial facilities;

hangars and mechanical shops;

garages and car parking areas;

concrete roads;

storage facilities;

loading and unloading areas.

Advantages

easily spread onto freshly laid flooring concrete surfaces;

creates a monolithic layer with concrete when forming a uniform surface and absorbing water contained in the spread flooring concrete due to modified polymers and quartz sand of specific fineness in its composition;

the surface strewn with this product is 3-4 times harder compared to the standard concrete surfaces;

resistant to frost, hot weather, and salts contained in the rain waters;

Application procedures

Preparation of the surface. At least one day before laying  fresh concrete onto existing concrete surface the latter should be thoroughly saturated with water, however there should be no free water left on the surface. should be strewn onto the freshly-laid concrete surface. Prior to application the floor formwork should be arranged in square sections, cracks control intervals should be defined, and concrete should be laid in accordance with these rules. To prevent formation of cracks in the concrete, the intervening gaps approximately 1 cm wide should be left open along the perimeter of the provided square sections, and foam plastic panels should be places in these gaps. After the concrete is load the foam plastic panels should be removed, and the gaps should be filled with elastic joint filling mixture. This will allow free expanding of the concrete without cracks.

To provide even edges of the freshly laid concrete the formwork should be cleaned and lubricated with formwork (mould) oil before each application. When laying the concrete the formwork should have the same height with the concrete layer. Installation of reinforcement elements between formwork structures will protect elastic joint filling mixture used to prevent continuous movement of the freshly laid concrete, which in its turn will increase the useful life of the joint filling mixture.

Structure. The metal structure size should not exceed the borders of the formwork. When assembling the structures from ready cut-and-bent reinforcement elements they should be laid one over another and distributed across the surface. To prevent formation of cracks on the concrete due to heavy loads the expansion gaps should be provided. Because of movement in horizontal or any other direction the intermediate structures should not exceed the borders of the formwork and should be attached to the formwork.

Primer. To increase the adhesive force between old concrete and the fresh concrete layer when laying monolithic concrete, epoxide (resin) based adhesives or  primers increasing adhesive force should be applied onto the rough surface of the old concrete before pouring fresh concrete.

Pouring of concrete. Primarily, the formwork should be places in accordance with the guide screeds. Prior to starting concrete pouring procedure the required number of Epohardener sacks should be placed near the formwork. The thickness of the laid concrete should be 7 cm maximum, the water/cement proportion should be at least 0.45, and the concrete grade should be S 25 or higher. When pouring the concrete into the square-sectioned formwork the concrete should be tampered using vibrator tool. Before water occurs on the concrete surface the surface should be finished using screed or wooden trowel, the water from the surface should be removed using long wooden trowel.

The composition of concrete or the screed floor subject to the Epohardener application should be prepared in accordance with the loads and soil conditions in the area of application. The surface hardener increases resistance of the concrete top layer to weathering and impacts, but does not impose any influence on the concrete strength, therefore any failures resulting in occurrence of cracks on the concrete surface may cause the same problems in the concrete surface hardener.

The required amount of the concrete surface hardener for the operation should be available at the work site.

Before the concrete surface hardener application the lower guide screed edges should be V-cut to form approximately 5х5 mm triangle cutouts along the gaps. The cut areas should be filled with the Epohardener mixed with a small amount of water. This procedure prevents spalling of the edges under loads. In order to prevent segregation of the additive substances in the composition of the concrete surface hardener during application the product should be strewn thickly. The application process may differ depending on the actual ambient or weather conditions.

The strewing works may be started once the concrete hardening has reached such degree when walking on its surface leaves maximum 0.5-1.0 cm deep footprints.

The product should not be strewn by portions. As far as possible the surface should be strewn equally and screeded using an appropriate tool.

In case the product is applied by portions,  all extra amounts of the product should be immediately removed and the surface should be screeded.

The first step of the procedure is to strew 2/3 of the total product amount planned for application onto the concrete surface and to screed it with a float trowel.

Once the applied product has changed its color absorbing water from the concrete it should be finished using special equipment (concrete helicopter) in order to facilitate bonding between the surface hardener and the concrete. Then the rest of the product should be strewn onto the concrete surface similar to the above step, and the specified  procedures should be repeated.

Prior to finishing the surface with the help of the concrete helicopter, extra amounts of the product strewn earlier onto the concrete surface should be removed with a brush.

After the first step finishing, the second step finishing is performed with concrete grinder blades. Grinding is performed till the required glazing degree is achieved..

The hardener application period may vary depending on the quality and grade of the concrete used and on the ambient conditions. In warm weather this period is shorter, while in cold weather it is increased. Prior to application pay attention to the hardening period of the concrete.

Recommendations. At the time of Epohardener product application  the ambient and soil temperatures should be between +50C and +300C. The process of the surface hardening should be controlled by qualified specialists. Application of the concrete surface hardener increases resistance of the surface to wear and impacts, but does not impose any influence on its mechanical strength. On this reason the concrete subject to the surface hardener application should be prepared taking into consideration all the possible effects. When applying Epohardener the thickness of the freshly laid concrete should be at least 7 cm, the water/cement proportion should be at least 0.45, and the concrete used should be grade S 25 or higher. After use all hand tools and devices should be cleaned with water. After hardening the epohardener product can be removed from the surface by mechanical means only.

Technical specifications

Color

Red, grey, green

Composition of the product

Powder mix containing modified polymer, cement based, includes quartz sand and additive substances

Strength limits:

compression

 

75-80 N/mm2

Abrasive strength:

By Bohme method

By Capon method

 

6-8 g/cm3/50 mm2/2nd class

67 mm3 (at 100 turns)

Packing

25 kg sacks made of 2- or 3-layer craft paper and 1 layer of polyethylene

Consumption

Depending on the purpose and traffic load the product consumption may be within 4-8 kg/m2. In case a light color is selected the minimum consumption shall be 7 kg/m2.

Shelf Life and Storage Method

The product can be stored during 12 months in original sacks in dry conditions.

Warnings

taking into consideration that the Epohardener product is a complex composition mixture, immediately rinse it with water in case of contact with skin or eyes;

do not add any substances not indicated in the application instructions;

parameters indicated above have been received on the basis of laboratory tests conducted in the ambient conditions of +230C±20C temperature and 50% + 5% humidity. Depending on the actual ambient conditions these parameters are subject to change.

Warranty and technical support

information indicated in technical specifications is based on scientific and experimental data;

EPO company is responsible for the product quality only;

with the exception of cases of works executed under the supervision of the company specialists, EPO company shall not be liable for any problems occuring due to improper use of the product by other persons;

the company reserves the right to make changes in its product in consequence of scientific-and-technical development;

for technical support and/or more information please do not hesitate to contact the EPO company!

Last Updated (Friday, 14 October 2016 06:15)