OTREC RR-13-01
SKU: 51628462591

OTREC RR-13-01

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Description

OTREC RR-13-01This Phase II investigation of the durability of new concrete containing recycled concrete aggregates (RCA) sought to corroborate Phase I results for a study of alkali silica reactivity (ASR), investigate ASR mitigation methods, gather long term outdoor placement data, and survey transportation agencies about their RCA perceptions and usage. Findings show the ASTM coefficient of variation limits do not apply when incorporating RCA. We recommend

This Phase II investigation of the durability of new concrete containing recycled concrete aggregates (RCA) sought to corroborate Phase I results for a study of alkali-silica reactivity (ASR), investigate ASR mitigation methods, gather long-term outdoor placement data, and survey transportation agencies about their RCA perceptions and usage. Findings show the ASTM coefficient of variation limits do not apply when incorporating RCA. We recommend further testing to establish new standards.
The survey showed sustainability was important to most agencies; 54% had guidance for RCA use in new concrete, but only 15% reported strong federal guidance; 77% had concerns about ASR reaction; the biggest barriers to RCA use were quality issues, lack of standards, and unclear test guidance; the biggest RCA source concerns were shrinkage, ASR and residual chlorides. Data sought on RCA sources were condition at removal from service, reason for removal, whether the original structure needed repairs, and material age.

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SKU: 51628462591

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Verified Purchase
Amazon Customer
Whiting, US
★★★★★ 5
Very practical for the price.
Color: Black
Very practical for the price.
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Reviewed in the United States on May 25, 2026
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Christmas Gift
Phoenix, US
★★★★★ 3
Wobbly
Color: Grey
Wobbly and the metal bars keep coming off. Be aware. I’ve tripped over them. Be careful.
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Reviewed in the United States on April 21, 2026
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Robert A. Bertsche
Massapequa, US
★★★★★ 5
Essay to assemble
Color: Grey
Very nice. Did the job the way I wanted.
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Reviewed in the United States on April 28, 2026
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Jeni & Mark
Fort Morgan, US
★★★★★ 4
Good for a quick backdrop
This works well for what I needed – a simple background for my kids’ online school. It’s lightweight and very easy to put together, and it stands up fine without needing to mount anything. The color is listed as black, but it’s more of a dark gray in person. Not a huge deal, just something to be aware of. It’s not super heavy duty, but it does the job for privacy and as a video backdrop. Overall, a good, portable divider that’s quick to set up and works well for light use.
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Reviewed in the United States on February 21, 2026
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Michael G.
Omaha, US
★★★★★ 5
Works well!
Color: Grey
Works great!
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Reviewed in the United States on May 4, 2026

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