GSSG - Graphene Solid State Group LLC

TruGraphene® Concrete: Performance & Durability Redefined

Breakthroughs by Graphene Solid State Group LLC (GSSG) and Rotger Research Foundation Inc. have enabled the integration of pristine, plasma-made TruGraphene® (derived from organic carbon feedstocks such as coconut husk and algae; oxygen content <0.1%) into portland-cement systems. TruGraphene® enhances hydration kinetics, densifies the interfacial transition zone (ITZ), and refines the pore network—delivering higher strength, tighter crack control, and superior durability for modern infrastructure.

How It Works: Material Mechanisms

Nucleation of C-S-H: Graphene flakes provide abundant sites for cement hydration, accelerating and refining C-S-H formation.
ITZ Densification: Reduces microvoids at aggregate/paste and steel/paste interfaces, improving bond and load transfer.
Pore Refinement: Shifts from capillary to gel-scale pores; increases tortuosity and decreases permeability.
Microcrack Bridging: Toughens the matrix, limiting crack initiation and growth under load.
Rheology & Cohesion: Higher yield stress at equal water content improves segregation resistance and edge stability.

Fresh Concrete & Field Performance

TruGraphene® improves cohesiveness and segregation resistance while requiring thoughtful admixture tuning for workability.

Slump Control: Apparent slump may decrease at constant water; meet target slump with PCE high-range water reducer (HRWR), not added water.
Air Management: Carbon surfaces raise AEA demand—sequence admixtures HRWR → TruGraphene® dispersion → AEA and verify at point of placement.
Bleed & Finish: Reduced bleed yields cleaner surfaces; begin curing promptly in hot/windy conditions.
Setting: Often slightly earlier initial set; align finishing window to field conditions.

Hardened Mechanical Properties

Compressive Strength: +10–30% at equal w/cm (mix-dependent).
Flexural & Split Tensile: +15–50% via crack-bridging and stronger ITZ (mix-dependent).
Elastic Modulus & Toughness: Modest E increase (+5–15%) and higher post-crack energy absorption.
Abrasion Resistance: Denser near-surface zone improves wear for slabs and pavements.

Durability & Transport Properties

Chloride Ingress: RCPT/migration typically ↓ 30–70%; surface resistivity ↑ (favorable durability KPI).
Sorption & Permeability: Lower capillary absorption improves service life in deicer/marine exposures.
Freeze–Thaw & Scaling: Tougher matrix supports performance; maintain proper entrained air—do not trade air for graphene.
Sulfate/Acid Resistance: Better mass retention when combined with appropriate SCMs.
Carbonation: Generally slower due to densification; verify in local trials.

Placement, Consolidation, Finishing & Curing

Consolidation: Higher cohesion reduces honeycombing at proper slump and vibration.
Finishing Window: May arrive earlier; avoid premature closing due to lower bleed.
Curing: Begin moist curing/curing compound promptly to lock in strength and durability gains.
Plastic-Shrinkage Control: Use fogging, wind breaks, and evaporation-rate checks in hot/dry conditions.

Reinforcement, Joints & Structural Behavior

Steel Bond/ITZ: Denser ITZ improves bond and crack control near bars; development and splice lengths still per ACI 318.
Crack Widths: Narrower service-level cracks enhance durability and aesthetics.
Joints: Joint spacing/design remains per code; improved matrix helps slabs meet those demands more reliably.
PT/UHPC Synergy: Strong gains in repair mortars, overlays, and UHPC-style mixes.

Specifications, Submittals & QA/QC

We specify TruGraphene® as pristine graphene dispersion with dosage reported as active carbon % of binder, including dispersion chemistry and sequencing.

Targets: Strength class & w/cm; slump; air %; durability indices (e.g., RCPT ≤ 1500 coul @ 28 d or surface resistivity ≥ 20–25 kΩ·cm).
Compatibility Plan: Foam-index/air-stability check with site cements/SCMs; pump-shear verification.
QC Methods: ASTM C143 (slump), C231/C173 (air), C1064 (temp), C138 (unit weight/yield), C39 (compressive), C78/C496 (flexural/split), C1202 or AASHTO T358 (RCPT/resistivity), C1585 (sorptivity).

Specialty Methods & Applications

SCC: Higher segregation resistance at target flow with HRWR/VMA tuning.
Shotcrete: Lower rebound, stronger early hold for overhead/repair.
Overlays & Repair Mortars: Greater toughness, bond, and chloride resistance.
Pavements & Marine: Enhanced wear and chloride defense for slabs, bridge decks, and coastal structures.

Environmental & Life-Cycle Benefits

Binder Optimization: Achieve target performance with lower paste for reduced embodied carbon per m³.
Service Life: Lower diffusivity and tighter cracks extend time to corrosion initiation.
Optional Smart Functions: At higher loadings or with conductive networks, enable self-sensing and low-voltage de-icing in specialty toppings.

Trial-Batch & Deployment Plan

Dose Matrix: Example 0.00 / 0.03 / 0.06 / 0.10% active carbon at target w/cm.
Sequencing: Water 70–80% → cement/SCMs/aggregates → PCE HRWR + TruGraphene® mother dispersion → balance water → AEA last.
Mixing: 60–90 seconds per yd³ after graphene addition; verify homogeneity.
Acceptance: Select the lowest-paste, spec-compliant dose meeting strength and durability targets.
Pre-Pour Meeting: Confirm pump line layout, consolidation plan, and curing/jointing strategy.

Key Numbers

Strength: +15–25% compressive; +25–40% flexural at equal w/cm (mix-dependent).
Durability: RCPT ≤ 1500 coul or ↓ 40–60% vs control; surface resistivity ≥ 20–25 kΩ·cm @ 28 d.
Workability: Maintain slump via HRWR; adjust AEA to hold 6.0% ± 1.5% for freeze–thaw exposures.
Optimization: Potential w/cm reduction of 0.02–0.05 at equal strength with paste trimming once rheology is tuned.

TruGraphene® transforms conventional concrete into a higher-performance, longer-lasting material system. By refining hydration, strengthening interfaces, and reducing transport pathways, it delivers measurable gains in strength, durability, and life-cycle value—without changing core construction practices. GSSG and Rotger Research Foundation Inc. provide turnkey specifications, trial-batch plans, and field QC integration to accelerate adoption on your next project.