Introduction

Spray‑applied geopolymer lining (SAPL) is Hinterland Group’s trenchless solution for restoring large‑diameter gravity pipelines and culverts across Florida with minimal surface disruption. SAPL is well‑suited to coastal/tidal conditions, corrosive wastewater environments, and high‑groundwater geologies common to the state, and is delivered by Hinterland’s in‑house crews as part of our PRIME program of Pipeline Rehabilitation, Repair/Replacement, Inspection, Maintenance, and Evaluation/Assessment. We reference industry guidance including ASTM F3706 for spray‑applied geopolymer linings, and tailor every design to local hydraulic and structural demands.

When SAPL is the right choice in Florida

Deteriorated corrugated metal pipe (CMP), reinforced concrete pipe (RCP), brick, or masonry culverts without feasible open‑cut options.
Corrosion from H₂S or chlorides (lift stations, force main discharges, coastal outfalls) where cementitious repairs have underperformed.
Infiltration/exfiltration, joint loss, or shape loss requiring a structural or semi‑structural liner built to engineered thickness.
Traffic‑sensitive corridors (FDOT roadways, airports, seaports, rail) where maintaining operations is critical.
High‑groundwater, sinkhole/karst, or tidal influence zones needing rapid, low‑risk installation.

Technical scope and design parameters

Diameter and shapes: typical SAPL delivery for man‑entry assets 24–120 in (round, elliptical/arch, box, horseshoe). Smaller or larger assets evaluated case‑by‑case via engineering review.
Host materials: CMP, RCP, brick/masonry, clay; compatible with most stormwater and sanitary gravity conveyance assets (culverts, trunk drains, interceptors, manholes, special structures).
Design methodology: wall‑thickness determined from load cases (soil cover, groundwater, live loads), host condition, ovality, and service environment; reference practices include ASTM F3706 for spray‑applied geopolymer lining.
Hydraulics: smooth finished surface reduces roughness and helps restore capacity; pre‑ and post‑CCTV verifies debris removal and final liner continuity.
QA/QC: surface prep verification, leak stoppage, build‑thickness checks, adhesion where specified, CCTV acceptance, and documentation suitable for municipal recordkeeping.
Work sequencing: in‑house bypass design/operation as needed, confined‑space controls, MOT planning, multi‑pass geopolymer application, finish/trowel as specified, cure and commission.

Florida SAPL quick facts

Attribute	Details
Diameter range (typical)	24–120 in (man‑entry), other sizes by engineering review
Asset types	Highway/airport culverts, storm drains, sanitary gravity mains, manholes, special structures
Host pipe materials	CMP, RCP, brick/masonry, clay
Environments	Coastal/tidal, high groundwater, corrosive wastewater, urban traffic corridors
Reference standard	ASTM F3706 (spray‑applied geopolymer lining)
Delivery support	In‑house bypass pumping, electrical integration, MOT planning
Acceptance	Documented thickness, continuity (CCTV), and specified QA records

Typical Florida use cases

DOT and county roadway culverts under HL‑93/traffic corridors (night or off‑peak work windows).
Airfield drainage and airside culverts where runway/taxiway closures must be minimized; see our Airports solutions.
Coastal stormwater outfalls and tidal backflow‑affected trunk mains.
Wastewater gravity interceptors and lift station structures experiencing H₂S corrosion.
Industrial campuses and ports requiring rapid return to service and limited laydown areas.

Why Hinterland for SAPL in Florida

All trenchless technologies performed in‑house (SAPL, CIPP, pipe bursting, sliplining), enabling objective method selection; see Pipe Rehabilitation.
Rapid mobilization across Florida with 24/7 emergency response and a 15‑minute callback commitment; in‑house bypass pumping and electrical crews streamline critical work; see Services.
Safety leadership with dedicated programs and OSHA‑certified instruction, enabling predictable schedules in constrained work zones.
Southeastern coverage supported by a secondary wetout facility in Morganton, NC for surge capacity and disaster response.

Delivery workflow

Condition assessment: debris removal and robotic CCTV; see Inspection.
Engineering/design: liner thickness and sequence based on loads, hydraulics, and host condition; reference ASTM F3706 and project specs.
Traffic/bypass planning: in‑house design for MOT and pumping to maintain service and operations.
Surface prep and leak stoppage: pressure wash, profiling, and chemical/structural water control as needed.
SAPL application and finishing: multi‑pass geopolymer placement to engineered thickness, finish/trowel, cure, and reinstatements.
Acceptance and turnover: thickness validation, CCTV, documentation, and maintenance recommendations; see Maintenance Plans.

Coverage and rapid response

Headquartered in Riviera Beach, we support municipalities, utilities, and private owners statewide—from Miami‑Dade, Broward, and Palm Beach through the Treasure Coast, Orlando, Tampa Bay, Southwest Florida, Jacksonville/First Coast, and the Panhandle—with planned projects and emergency mobilizations.

Start a SAPL assessment

Need to evaluate a culvert or large‑diameter gravity asset for SAPL? Request a site walk, CCTV review, and preliminary design recommendations via our Contact us page. We can also compare SAPL versus CIPP, sliplining, or pipe bursting to select the most cost‑effective, lowest‑risk option for your asset and schedule.

SAPL / spray‑applied geopolymer lining – Florida