Trinity Lightweight combines industry leading experience and technical expertise with excellent logistics capabilities and industry partnerships to provide solutions for such problems as coastal erosion, soft compressible soils, concrete durability and much more.
Trinity Expanded Shale & Clay produces Riverlite® in Erwinville, LA, Livingston, AL and Proctor, AK. Companies in the construction, concrete, geotechnical engineering, and filtration industries benefit from our ability to provide solutions that reduce costs and increase their profits.
Riverlite’s unique properties include low unit weight, high angle of internal friction, low thermal conductivity and high fire resistance.
The key to Riverlite’s success is its raw material: unique clay deposits are mined, then processed using the rotary kiln method developed almost a hundred years ago. The clay is heated to approximately 2000 degrees Fahrenheit. During this stage of production, computers monitor the calcination of the raw material. The result of this process is a structural grade, lightweight aggregate which is then crushed, graded and stored in stockpiles.
Trinity's lightweight aggregates are used in a variety of concrete products including concrete masonry units and structural lightweight concrete for buildings and highway bridge decks. Other applications include precast / prestressed concrete, skid-resistant asphalt paving, geotechnical fill, and specialty products such as adhered manufactured stone masonry veneers. The aggregates are also integrated with organic matter to create living soils for horticulture uses, and used as part of manufactured media for self-contained storm water systems.
Riverlite® expanded clay lightweight aggregate is produced to comply with the requirements of ASTM C330, Standard Specification for Lightweight Aggregates for Structural Concrete and ASTM C 331, Standard Specification for Lightweight Aggregates for Concrete Masonry Units. Its low unit weight permits the production of very low density concrete which incorporates low cost natural aggregates in combination with Riverlite®. In concrete masonry, the result is lightweight concrete masonry units with superior strength, texture, fire resistance, thermal performance and acoustical properties.
Riverlite® is a registered trademark of Trinity Lightweight, a Trinity Industries, Inc. company.
Fact : Expanded shale clay and slate (ESCS) lightweight aggregate produces safe, economical asphalt surface treatment.
Trinity Lightweight is a leading supplier of expanded shale and clay aggregates for asphalt surface treatments (chip seals). Trinity's technical sales staff has decades of experience in successful lightweight chip seal applications. When bonded to asphalt, Trinity Lightweight aggregate chip seal creates a significantly improved asphalt surface treatment that is safer, more economical and longer lasting than ordinary aggregates. Wet or dry, lightweight chip seal road surfaces provide superior skid resistance throughout its service life. Lightweight aggregate does not polish as it wears. Because of its low density there are trucking and handling cost advantages to the contractor, and damage to vehicle windshields headlights, and paint caused by "flying" stones is virtually eliminated with structural lightweight aggregate.
Fact : ESCS lightweight aggregate produces structural lightweight concrete that is durable when exposed to freezing and thawing cycles.
Trinity Lightweight can provide concrete producers in northern regions with data from independent laboratories demonstrating lightweight concrete's durability in cyclic freezing and /thawing conditions. In addition, the Expanded Shale,Clay & Slate Institute (ESCSI) has decades of performance records on lightweight concrete from the Treat Island, Maine outdoor exposure facility operated by the U.S. Army Corps of Engineers, where test prisms are installed at mid-tide level on a rack and are exposed to repeated cycles of wetting and drying and to about 100 cycles of freezing and thawing per year.
Fact : ESCS lightweight aggregate saves money in many geotechnical fill projects.
Lightweight aggregates are approximately half the density of ordinary fill materials. This property, coupled with a consistently high angle of internal friction (phi angle), reduces lateral earth pressures on retaining walls and bulkheads by more than half. Lightweight aggregate has been effectively used to solve numerous geotechnical engineering problems and to convert unstable soft soil into usable land. Lightweight fill also provides permanent, non-degradable insulation around thermally sensitive elements and beneath heated tanks. Trinity Lightweight has supplied lightweight aggregate for many successful geotechnical projects.
Fact : ESCS lightweight aggregate is used to produce structural lightweight concrete masonry units.
There is a reason that high performance lightweight concrete masonry made with expanded shale clay or slate lightweight aggregate is widely used in schools, big box retail buildings and other projects. In a sustainable environment, the quality and economy of lightweight concrete masonry walls makes it the material of choice by building designers and mason contractors in many parts of the country today. Lightweight units meet and exceed ASTM C 90 requirements for load-bearing units while reducing mason fatigue and enhancing productivity, thereby reducing wall costs.
Fact : ESCS lightweight fine aggregate can be used to provide internal curing for high performance normal weight concrete.
Prewetted expanded shale, clay or slate lightweight aggregate is a simple and practical way of supplying additional curing water throughout the concrete mixture. This is done by replacing some of the normal weight concrete sand with an equal volume of prewetted ESCS fine aggregate. Internal curing improves the properties of hardened concrete, reducing shrinkage and cracking, and increasing durability and service life. Trinity Lightweight has been an industry leader in the implementation of internal curing.