Products | Manufactured Products | ArmorCem^TM VRH Rapid Hardening Hydraulic Cement

Concrete, Load Bearing Elements and Rehabilitation 02450, 02950, 03930

Click here to download the PDF file (129 Kb)

1. Product Name
ArmorCem^TM VRH Rapid Hardening Hydraulic Cement.
Colors: Classic Gray or Sandstone

2. Manufacturer
Mineral Resource Technologies, Inc.
2700 Research Forest Drive
Suite 150
The Woodlands, TX 77381
Ph: (281) 362-1060
Ph: (800) 615-1100
Fax: (281) 362-0370

3. Product Description

BASIC USE
MRT® has scientifically formulated, tested, and currently manufactures ArmorCem^TM VRH Rapid Hardening Hydraulic Cement to produce rapid setting concrete mix when constructing or repairing con-crete structures or surfaces which must be put into service immediately. For spe-cific rapid hardening concrete mix propor-tions, contact MRT Technical Representa-tives.

COMPOSITION & MATERIALS
ArmorCem^TM VRH Rapid Hardening Hydraulic Cement is a patented blend of ingredients including high quality, specially selected minerals of silica, alumina, cal-cium, special clays and other pro-prietary compounds. In excess of eighty percent (80%) of the total in-gredients are derived from recycled coal fly ash. These ingredients are accurately measured, combined and blended at MRT’s manufacturing facilities using rigid quality control conditions.

PACKAGE SIZES
25 kg (55 lb) and 42 kg (92.6 lb) plastic bags and 22.7 kg (50 lb) pails.

YIELD
A 25 kg (55 lb) bag of ArmorCem^TM VRH will yield over 1 cu. ft. of rapid setting con-crete mortar when mixed with the proper proportions of Concrete (ASTM C 33) sand, aggregates, and water as prescribed in the mixing instructions.

PHYSICAL/CHEMICAL PROPERTIES
When mixed appropriately, ArmorCem^TM VRH yields the following test results when tested in accordance with the applicable ASTM Test Methods.

PREPARATION Prepare the area to be patched by squaring up the area (with no out-side corners). Do not attempt to fill an area greater than can be finished in 20 minutes. Steel placement must comply with ACI 345R and have at least 2 Inches of concrete above the steel. All surfaces that will receive the ArmorCemTM VRH mix shall be clean and free of foreign matter (dirt, loose concrete, debris, oils, grease, paints, sealers, etc.). The application surface must be saturated with water prior to receiving the mixture to ensure a good bond. Do not leave standing water on the surface.

MIXING

Note 1: MRT recommends that a ma-chine be used to mix ArmorCem^TM VRH Rapid Hardening Hydraulic Ce-ment.

Note 2: ArmorCem^TM VRH Rapid Hardening Hydraulic Cement is to be used without the addition of any addi-tives, lime or other brands or types of cement.

Note 3: If the environmental tem-perature is 23°C (73°F), the setting time of ArmorCem^TM VRH is approxi-mately 20 minutes. In hot or cold weather, the setting time will be de-creased or increased respectively (see Limitations Section). Trial batches should be made to deter-mine the exact setting time for the conditions present. Contact your MRT representative for best con-crete mix designs for attaining specifications.

Step 1: Add the amount of water required to the mixer. Add the water, and then add the stone. Step 2: Add the cement to the mixer, begin mixing and mix for two minutes and slowly add the sand. Note: Do not adjust the mix water until after the mortar has mixed for four (4) full minutes. The mix will look dry at first and will become wetter after the first three minutes of mixing. Step 3: If the mix is still too dry, spar-ingly add a little water and mix for a full minute prior to adding more water. Repeat this step if necessary. Step 4: Some adjustment may be required in water amount needed due to varying aggregate moisture contents.

For specific high strength concrete mix designs, call (800) 615–1100 for bridge, freeway or airport concrete and fast track paving mixes.

Step 5: After mixing, spread the wet mixture across the area to be filled, placing the material from one side to the other. Vibrate the mix into place with a concrete vibrator. When the area is filled, power screed off the area to a flat surface. Float it one time; broom finish the area. Edge if desired or specified.

Step 6: Apply high quality commercial membrane curing compound with a sprayer immediately after finishing.

CURING
During the first 24 hours after place-ment, the concrete mixture should be kept covered with plastic or damp to prevent excessive loss of water.

As recommended by the American Concrete Institute, if environmental conditions are below 40°F (4°C) or expected to drop below 32°F (0°C) within 2 hours of placement, one should observe cold weather precau-tions, or if environmental conditions are above 85°F (29°C) during mixing and placement, cool water should be used to lengthen the set time, observing hot weather precautions.

LIMITATIONS

1. Walk-on time is about 60 minutes in normal weather conditions. Drive on time is 2 to three hours depending on concrete mix design.
2. Engineering requirements and envi-ronmental conditions must be consid-ered to assure proper performance of the product.
3. ArmorCem^TM VRH Rapid Hardening Hydraulic Cement should be mixed with clean fine and coarse aggregates meet-ing the requirements of ASTM C 33.
4. As with all cement products, ArmorCem^TM VRH Rapid Hardening Hydraulic Cement is produced from naturally occurring minerals, and varia-tions in color may occur. Also, varia-tions in sand will affect color. Color samples of the mixture should be tested for color conformity prior to use on a project.

SAFETY
Hydraulic Cements can cause injury to eyes and skin. Avoid eye contact or prolonged contact with the skin. MRT recommends using tight fitting goggles, rubber gloves, and protec-tive clothing to cover arms and legs adequately. In case of eye contact, flush with clean water for a minimum of fifteen (15) minutes and consult a physician immediately. Wash skin thoroughly after use. Only use with adequate ventilation and use of an approved respirator is recommended. Keep out of the reach of children and pets.
Material Safety Data Sheets (MSDS) are available upon request at the contact information listed in Section 2.

6. Availability
ArmorCem^TM VRH Rapid Hardening Hydraulic Cement is available through-out the United States through dealers and distributors of MRT Products. Con-tact MRT as listed in Item 2 for a dis-tributor in your area.

7. Warranty
No one is authorized to make any modifications or additions to this war-ranty. Mineral Resource Technologies, Inc. (MRT®) warrants that Ar-morCem^TM VRH Rapid Hardening Hydraulic Cement shall be in accor-dance with ASTM Cement Specifica-tions for Rapid Hardening Type VRH. MRT makes no warranty or represen-tation, either expressed or implied, with respect to this product, and disclaims any implied Warranty of Merchantabil-ity of fitness for a particular purpose. As MRT has no control over the other ingredients mixed with this product or the final application, MRT does not and cannot warrant the finished work. IN NO EVENT SHALL MRT BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, OR INCIDENTIAL DAMAGES ARIS-ING OUT OF THE USE OF THIS PRODUCT, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAM-AGES. IN NO CASE SHALL MRT’S LIABILITY EXCEED THE PURCHASE PRICE OF THIS PRODUCT.

8. Maintenance None Required 9. Technical Services MRT maintains technical field repre-sentatives and a fully staffed Technol-ogy Center. For assistance contact MRT at (800) 615-1100. Información Técnica y una copia de este Documento de Información esta disponible en Español. Por favor llamar a MRT al 800 615-1100 para conseguir esta información. Revised: November 9, 2006