MEGEL AG-200 — Medium Aerogel Granules for Insulating Concrete

Overview

MEGEL AG-200 is the medium-granule specification within the MEGEL silica aerogel granule range — supercritically dried silica aerogel produced in 1.5–3 mm granule format for integration as the dominant aggregate in lightweight thermal-insulating concrete. The particle size is selected to match the coarse-fine intermediate gradation typical of cellular concrete and insulating screed formulations, and the bulk density (70–90 kg/m³) is the lightest in the AG range — minimising the structural dead-load contribution of an aerogel-concrete element.

AG-200 sits at the technical sweet spot for structural-grade insulating concrete: granules large enough to disperse uniformly through 1.5–2 m³ concrete-mixer batches without floating to the surface, small enough to pump through standard concrete-pumping equipment without aggregate-blockage failure, and dense enough to settle reproducibly in placed concrete without segregation. The resulting cured concrete has a density-to-thermal-resistance ratio that is the dominant cost-performance driver in commercial floor-slab and roof-deck thermal-break applications.

The hydrophobic surface treatment is particularly important in concrete applications — alkaline cement-water solution (pH 12–13) would degrade unprotected aerogel. AG-200's silylated surface remains chemically stable through the cement hydration cycle, preserving granule integrity in the cured concrete matrix and the corresponding thermal-conductivity benefit over the full service life of the structure.

Technical Specifications

Applications

Insulating Concrete Floor Slabs

AG-200 at 25–35% volume loading in cellular floor-slab concrete produces a thermal-insulating layer between structural floor and finish wear-coat — typical concrete density 400–600 kg/m³, thermal conductivity 0.080–0.110 W/(m·K), compressive strength 1.5–2.5 MPa. Used as the thermal break in ground-floor slabs to reduce ground-coupled heat loss, in radiant-heated floor systems to direct heat upward into the room rather than downward into the substrate, and in apartment inter-floor slabs to reduce footfall sound transmission.

Roof Deck Thermal Break Concrete

AG-200 30–40% volume in lightweight roof-deck concrete provides a thermal break layer between structural roof deck and exterior membrane — typical density 500–700 kg/m³, λ 0.090–0.120 W/(m·K), compressive strength 2.0–3.0 MPa. Replaces conventional thermal-break detailing using foam insulation plus structural concrete, simplifying construction sequence and providing a single material layer with both structural and thermal performance.

Sandwich Panel Core for Modular Buildings

Modular construction sandwich panel cores use AG-200 at 30–50% volume in cellular concrete cores — between structural-grade outer concrete skins or between fibre-cement boards. The lightweight cored panel achieves thermal conductivity below 0.10 W/(m·K) at a panel thickness of 80–120 mm — competitive against pre-fab steel-stud-and-mineral-wool sandwich systems for modular building applications, with structural fire-resistance equivalent to concrete (not subject to combustion or melting failure modes of foam-cored panels).

Insulating Geopolymer Concrete

AG-200 is compatible with alkali-activated geopolymer concrete systems for fire-protective construction, blast-resistant building cores, and refractory backup insulation. The geopolymer-aerogel concrete combines pH-stable matrix with aerogel thermal performance — used in industrial fire-rated wall partition systems for refineries, chemical plants, and cement-industry equipment housing.

Packaging & Storage

AG-200 is supplied in two standard package formats:

• 15 kg PE-lined paper bag — pilot-scale concrete mix testing, small-batch insulating screed applications
• 1 m³ FIBC (~70–90 kg net) — production ready-mix concrete plants, sandwich panel manufacturers

MOQ is 200 kg; 40' container loads typically 10–14 m³ of FIBC product depending on density. Bulk handling via closed-system pneumatic transfer at <0.3 bar pressure is the recommended industrial protocol — higher pressures degrade granule integrity.

Store dry, below 40°C. The hydrophobic surface treatment maintains performance under high-humidity storage typical of construction-site batch plant operations. Granule format is robust under standard concrete-plant aggregate handling; some fines can be expected after extended transfer but do not compromise the thermal performance of the cured concrete.

P100 respirator and eye protection during bag-opening operations. Shelf life is 24 months in original packaging; no thermal performance degradation after this period but documentation traceability may expire.

Related Products

• MEGEL® Silica Aerogel — parent hub
• MEGEL AG-100 — fine granule (0.5–1.5 mm) for plaster
• MEGEL AG-300 — coarse granule (3–5 mm) for construction board core
• MEGEL AP-300 — coarse powder alternative for high-volume mortar
• MEGEL AC-300 — pre-formulated PU aerogel coating slurry for industrial spray