Permeable infrastructure

Permeable Infrastructure for Pedestrian Routes

Stone and recycled rubber composite. Poured in place. Specified as a calibrated pedestrian paving system for civil and architectural environments.

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Flexus AP surface macro sample (alternate)

System snapshot

TypePermeable elastic surface

UsePedestrian routes

CompositionStone + recycled SBR

BinderUV stable aromatic polyurethane

SeriesCP (civil) / AP (architectural)

Lifts1.50" / 2.00" / 2.50"

Between Loose Aggregate and Rigid Pavement

Category definition

More stable than gravel
More forgiving than concrete
Fully permeable surface system
Pedestrian‑scaled infrastructure

Flexus defines a new category of permeable pedestrian infrastructure.

What it is

Blend50% specialty aggregate / 50% recycled SBR

BinderUV stable aromatic polyurethane

PlacementPoured‑in‑place, single lift

FinishSeamless, stone‑forward

BaseOpen‑graded aggregate subbase

UsePedestrian routes only

CP series

Civil Pavement

For municipalities, parks, and cost‑controlled public projects. Neutral blends. Standardized execution. Performance‑first.

CP-150CP-200CP-250

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AP series

Architectural Pavement

For campuses, gardens, and design‑led environments. Curated stone blends. Intentional palette. Elevated finish control.

AP-150AP-200AP-250

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Lift Options

Lift	Thickness	Primary use	Design intent
150	1.5″	Light‑duty pedestrian paths	Visual integration
200	2.0″	Primary circulation routes	Standard performance
250	2.5″	Higher pedestrian volume	Increased resilience

All lifts share the same system architecture. Thickness calibrates structural intent.

Performance & testing

ASTM C501 abrasion resistance — completed ASTM F1551 permeability — completed ASTM E303 slip resistance — completed ASTM D2859 water absorption — completed ASTM G154 UV exposure — completed EPA Method 1311 & 1312 (TCLP/SPLP) — in progress RCRA Metals (Including Hg) — in progress Submittals available — upon request

Design target permeability ≥ 50 in/hr (typical target). Confirmed values are available in the ASTM F1551 permeability report.

Pedestrian accessibility System intended for ADA-aligned pedestrian routes. Project-specific submittals available.

Binder system UV stabolized aromatic polyurethane specified for UV stability and long-term color control.

Specification posture Specified as a complete system: base, lift, edge restraint, and finish control.

We provide a consolidated submittal package for live projects (mix intent, installation guidelines, details, and testing status). Request the spec pack from Resources.

System

Base

Open‑graded aggregate substructure designed to support permeability and drainage.

Surface

Stone + recycled SBR composite placed in a single calibrated lift.

Edge condition

Hard restraint required. Details available in the spec pack.

Designed for specification. Not a decorative overlay.