Recycled Aggregate Concrete Patents: Top Companies & Trends 2026
A patent landscape analysis of recycled aggregate concrete and low-carbon cement technology: filing trends, leading companies, IPC composition, white space and key patents through 2026.
Filing growth = 2021 (122 records) → 2024 (179); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 1,574 records in scope (CR5), not the ranked leaders only.
What this landscape covers
This landscape tracks patent filings on recycled aggregate concrete and closely related cementitious binder claims, drawn from 1,574 records published between 2015 and the 2026 data cut-off. It combines a text search on recycled aggregate concrete with a claims-level search under the C04B ceramics-and-cement classification, so it captures both dedicated recycled-aggregate work and broader cement formulations that reference recycled or reclaimed aggregate in their claims. Publication lags filing by roughly 18 months, so the final one to two years of the trend understate real filing activity.
The technology sits at the intersection of waste valorisation and structural concrete performance: modifying recycled fine and coarse aggregate to offset the strength and durability losses that come from using demolition waste in place of virgin aggregate. The filer base spans cement majors, university research institutes and specialist recycled-materials firms, with a heavy concentration of activity in China alongside steady filing in the US, India, Europe and Korea.
Filing trends and technology composition
Two views of the same 1,574-record dataset: how filing volume has moved year over year, and how those records distribute across IPC subclasses. Because a single record can carry several IPC codes, the class shares below add up to well over 100% of the record total.
A decade of accelerating filing, with 2024 as the high point so far
Annual filings rose from 43 records in 2017 to a peak of 179 in 2024, including a 47% jump across the 2021-2024 span. The years after 2024 show fewer records only because publication has not caught up with filing yet, not because activity is cooling.
Publication lags filing by roughly 18 months, so 2025 onwards are still filling in. Growth rates on this page therefore end at 2024; running them to the last bar would understate the field.
C04B dominates; roads, structural components and waste disposal form the next tier
C04B (ceramics, cement and refractories) covers 86.6% of the 1,574 records, confirming this is fundamentally a cement-chemistry field. The next tier — shaping (B28B), mixing (B28C), pavements (E01C), structural components (E04C), solid waste disposal (B09B) and material testing (G01N) — each sit in the mid-single-digit percentages, marking the applied contexts where recycled-aggregate formulations get deployed rather than invented.
Shares are the percentage of the 1,574 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
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Try EurekaA representative filing and the most-cited prior art
Process for improving crack resistance of recycled aggregate concrete (Wuhan University, 2026)
A process for improving crack resistance of recycled aggregate concrete is provided. The process includes following steps: (1) soaking recycled fine aggregate in an organosilicon compound for modification, thereby obtaining modified fine aggregate; (2) soaking recycled coarse aggregate in a silica sol solution, then adding quicklime, thereby obtaining modified recycled coarse aggregate; and (3) mixing cement, carbide slag, fly ash and an additive with water until uniform, then sequentially adding the modified fine aggregate and the modified recycled coarse aggregate and mixing uniformly, finally performing later-stage curing to obtain the recycled aggregate concrete.Illustrates the current filing pattern: a multi-stage aggregate surface-modification process combined with a supplementary cementitious binder blend, rather than a single novel material.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5744078A | Accelerated processing of cement-bonded particleboard and fiberboard | 117 |
| 2 | US20120167802A1 | Temperature-Adjusted and Modified Recycled ASCON Composition for Reusing 100% of Waste ASCON for Road Pavemen… | 104 |
| 3 | US5936015A | Rubber-modified asphalt paving binder | 81 |
| 4 | US20070017418A1 | Magnesium cementitious composition | 71 |
| 5 | US20100058957A1 | Previous concrete comprising a geopolymerized pozzolanic ash binder | 68 |
| 6 | US5460649A | Fiber-reinforced rubber asphalt composition | 58 |
| 7 | CN102092993A | 一种再生骨料混凝土的纳米强化方法 | 51 |
| 8 | US20200331805A1 | Use of mineral fines to reduce clinker content of cementitious compositions | 49 |
| 9 | CN102786243A | 一种改性再生骨料和再生骨料高性能混凝土 | 48 |
| 10 | US6344081B1 | Concrete composition | 47 |
Citation counts favour older documents simply because they have had longer to accumulate citations inside this corpus; treat them as a marker of influence on the field's prior art, not of current commercial relevance.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
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Four read-outs from the dataset that matter more for a filing or freedom-to-operate decision than the raw counts alone.
No single filer dominates the field
The leading assignee holds 50 families, and the top 5 combined account for only 9.1% of the 1,574 records in scope. That is a low concentration for a decade-old field, meaning most of the claim space has been staked out by single-filing or low-volume entrants rather than locked up by a handful of majors.
Momentum is real, not an artefact of the trend chart
Filings rose from 122 records in 2021 to 179 in 2024, a sustained three-year climb rather than a single spike. Because publication lags filing by around 18 months, the apparent tail-off after 2024 reflects reporting delay, not a slowdown in actual filing activity.
Filing activity is heavily weighted toward China
China's receiving office accounts for 533 records, more than double the next largest office, the United States at 206. India (204), Europe (124), South Korea (122) and the WIPO PCT route (117) form a second tier, indicating this is a globally distributed but China-centred field.
The core chemistry sits in one class; applications spread outward
C04B (cement and refractories) covers 86.6% of the 1,574 records, confirming that innovation is concentrated in binder and aggregate chemistry itself. The mid-tier classes — pavements, structural components, mixing equipment, waste disposal and testing — show where that chemistry gets applied and tested, useful for scoping a freedom-to-operate search beyond the obvious class.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to low-carbon cement & concrete: recycled aggregate concrete patent landscape, with the prior art for and against each one.
Where to take this analysis
This landscape is a starting point for scoping filing strategy, freedom-to-operate review or competitive tracking in recycled aggregate concrete.
Run a freedom-to-operate check against the leading assignees
Cross-reference a specific formulation or process step against the claim scope of the ranked leaders before committing to a filing direction.
Open Eureka to search assignee claimsTrack the under-claimed adjacent branches
Waste disposal, material testing and polymer-modified binder classes each carry meaningful volume but no dominant filer — worth monitoring for new entrants.
Set up a watch in EurekaValidate a first-filing draft against prior art
Use the most-cited records here as a starting prior-art set before drafting claims on aggregate modification or binder substitution.
Draft and check claims in EurekaCommon questions about recycled aggregate concrete patents
This dataset contains 1,574 published records covering recycled aggregate concrete and closely related cementitious binder claims, spanning 2015 through the 2026 data cut-off. The assignee ranking counts the same 1,574 records across 100 ranked companies. Because families neutralise duplicate continuation and multi-jurisdiction filings, the family count is the more reliable measure of real invention volume than a raw document count would be.
The ranking spans 100 companies, led by a filer with 50 families, with the fifth-ranked company at 20 and the tenth at 17. The top 5 combined hold only 9.1% of all 1,574 records in scope, and the top 10 hold 14.7%, which is a low concentration for a field this active. That pattern points to a technology still being staked out by many independent filers rather than dominated by two or three incumbents.
Yes: filings rose from 43 records in 2017 to a peak of 179 in 2024, including a 47% increase between 2021 and 2024 alone. Because patent publication lags actual filing by roughly 18 months, the lower counts shown for 2025 and 2026 reflect that reporting delay rather than declining interest. Treat 2024 as the most recent year with a reasonably complete count.
China's receiving office leads with 533 records, more than the United States (206) and India (204) combined. Europe (124), South Korea (122) and the WIPO PCT route (117) form a meaningful second tier. This distribution suggests that while the technology is filed globally, the bulk of near-term commercial activity and competitive pressure originates in China.
IPC classes outside the core C04B cement chemistry — solid waste disposal (B09B, 3.4% of records), material testing (G01N, 3.4%) and polymer-modified binders (C08L, 3.4%) — carry meaningful volume without a dominant filer, unlike the crowded core chemistry class. These adjacent branches, particularly around waste-stream characterisation and testing protocols for recycled aggregate quality, look under-claimed relative to their applied importance and are worth a closer prior-art search before drafting new claims there.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.