Frequently Asked Questions

We have compiled a list of some of our most frequently asked questions about polymer concrete and Armorock as a company, in hopes of providing you with a quick resource for your questions. If you have additional questions, please feel free to contact us.

Polymer concrete has 5 ingredients:
    1. Resin
    2. Sand
    3. Aggregate
    4. FRP Rebar
    5. Pigment
  • In lieu of using cement as our binder, or “glue”, we are using resin to make the structure impervious to sewer gases. Our sand and aggregate used in the structures are also corrosion proof, as is FRP rebar.
    Polymer Concrete has been manufactured since the 1960’s, mostly in Europe. The most common polymer concrete structure prior to Armorock coming to market has been large diameter sewer interceptor pipe. The material has been in use in the USA in a variety of environments since the 1980’s.
    The product up to this point has been used mostly in pipe application. Also, up to this point, polymer concrete has been too expensive to be considered on everyday structures. Armorock’s focus and initiative was to bring the price point down on polymer concrete that it was a viable option for all collection system manholes and structures requiring corrosion protection. We’ve done that through a variety of innovations. Also, we just really like to market and tell people about our solution, so we are much more aggressive than previous manufacturer’s have been.

    Currently, there is no ASTM for polymer concrete structures. We pull from ASTM D 6783 for rigid polymer concrete pipe, as well as ASTM C478 for precast concrete manholes. Mix design comes from ASTM D6783, and loading baseline criteria from ASTM C478 (traffic rated loading). Currently, to help inspire customer confidence, as well as improve our systems, we are ISO 9001:2015 certified to help keep us in line with our own standard operating procedures and ensure we’re providing the customer a uniform product. You can download our latest specification section straight from the website.

    Our roots are in the concrete space, with our ownership group having history as a precaster in the Mountain West who has been in the underground construction business manufacturing a wide variety of concrete products since 1956. We’ve brought some of our expertise over to polymer concrete to assist in all that we are creating. Making thousands of structures over the last decade in polymer concrete has only added to our knowledge base.confidence, as well as improve our systems, we are ISO 9001:2018 certified to help keep us in line with our own standard operating procedures and ensure we’re providing the customer a uniform product. You can download our latest specification section straight from the website.

    Yes, we do! As the worldwide leader in polymer concrete by a wide margin, we know a thing or two about the material. We’ve been manufacturing polymer concrete manholes and structures since 2007, and are continually improving our process. Our background is from precast concrete and being a producer in this space since 1956.

    Nothing. The product comes to the jobsite prefabricated to be corrosion proof.

    Armorock provides a corrosion proof warranty. We insure that the polymer concrete manholes and structures will be resistant to sewer gases and corrosive environments for 50 years from installation. Our warranty is more than a piece of paper. It has hard backing and is not dependent on a human application of a product. Armorock’s material is corrosion proof throughout the structure.

    Armorock polymer concrete manholes and structures are certified to carry both H-20, HS-20 and HL-93 Traffic Rated loads, out of the box! No specific bedding requirements or loading slabs (on top or on bottom) required. They are a rigid and structural product.

    Ballast slabs and support slabs are not needed in general application. However, if dealing with a high groundwater table, then calculations can be reviewed if a ballast slab helps anchor the polymer structure. If needed based on the geotechnical report and groundwater, we will do it.

    Polymer concrete weighs approximately 140 pounds per cubic foot. Traditional concrete weighs approximately 150 pounds per cubic foot. The reason our product weighs less overall than traditional manholes is that we utilize a different design due to our high strengths.

    You would put a new lateral line into an Armorock polymer concrete structure the same way you do traditional concrete. Call your local coring company, or use a wetsaw fitted with a diamond blade to core it yourself in the field. Anything that you do to work with traditional concrete in the field, you do can do with polymer concrete.

    STEEL REBAR CORRODES. That’s why we utilize FRP rebar reinforcement (GOVERNED BY ACI 440 CODE) rather than steel like traditional concrete. Another reason being is that polymer has a higher rate of expansion that steel, so we use fiberglass rebar that expands and contracts at relatively the same rate as the polymer. It eliminates a potential problem area.

    More than one. Owners need not to worry about sole specification on bidding, as competitive bidding is achieved every day with polymer concrete. With that being said, Armorock produces more polymer concrete structures than anyone in the world and the USA by a wide margin.

    We have third party testing done to prove our mix design is made out of corrosion proof material. Testing was done in accordance with the California Green Book Standard of Engineering. Results are readily available as requested. We also consistently test our product and all ingredients following ISO 9001:2018 guidelines so that we are providing the same quality and corrosion proof material that you’ve come to expect from Armorock.

    No. Polymer concrete structures are rigid and carry structure on their own. The same cannot be said for fiberglass structures, as they recommend ballast slabs and load disbursement material to assist the structure carrying traffic rated loads.

    No secrets. Many contractors utilize their same estimate for installing a concrete storm drain manhole. The idea with polymer concrete, is set the manhole, stack it, backfill, and move on. It is a much quicker installation than any other manhole products currently available.

    Armorock is looking at an aggressive growth schedule, and as the market dictates, more facilities will be brought online to meet the growing demand. Currently, all material is fabricated in Las Vegas, Nevada, Dallas, Texas, and Tampa, Florida area. Other plants will become operational to meet demand.

    We’ll get you as many Armorock polymer concrete structures as quickly as you need them. We are here and happy to be of assistance in providing you sustainable corrosion proof infrastructure. Call your local sales manager ASAP and we’ll get you taken care of!

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    We’re here to help and answer any question you might have. We look forward to hearing from you.