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Mechanically compacted from the same furnace fume — every agglomerate stays free-flowing at 600–680 kg/m³ bulk density, so you get lower shipping cost per ton than undensified, with far less dust on site. SiO₂ 85%–95%, all grades meet ASTM C1240, produced under ISO 9001 / 14001 / 45001 certified system, shipped from stock.
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600–680 kg/m³
Bulk density
compacted, free-flowing
Less
Dust on handling
vs undensified
Lower
Freight cost per ton
vs undensified
7 days
Ex-stock lead time
Qingdao / Xingang
600–680
kg/m³ BULK DENSITY
DENSIFIED — compacted agglomerates
Particles fused into free-flowing clumps → high bulk density, low dust, cheap to ship. Modern high-shear mixers re-disperse them fully.
UNDENSIFIED — free-flowing spheres
Each particle separate — peak reactivity, but bulky and dusty. Choose undensified only when the last % of activity matters.
Mechanical agglomeration raises bulk density to 600–680 kg/m³ — roughly double the as-produced figure, so far more tons fit in every container.
Lower freight cost per ton shippedAgglomerated granules stay locked together during handling and discharge — minimal airborne dust versus loose undensified powder.
Safer, cleaner batching environmentFree-flowing compacted granules move smoothly through screw feeders and pneumatic lines — no bridging, no clogging at the silo.
Fits standard ready-mix plantsThe workhorse grade for bulk commercial concrete, where tonnage and freight outweigh the last percent of pozzolanic activity.
Best $/MPa at scaleThe industry default grade for bulk pours. Compacted form cuts freight per m³ of concrete; 28d activity ≥108% drives strength at scale.
Purer silica = denser C-S-H matrix. Cuts chloride diffusion roughly 10× versus plain OPC — ports, jetties, offshore decks.
Free-flowing granules improve pumpability and cut rebound. The cost/logistics balance most tunnel campaigns settle on.
LOI ≤2.0% means fewer impurities at 1,600 °C and above. Mullite forms in situ — standard for steel ladles and kiln linings.
Compacted flow suits automated batching; sub-micron packing improves early demould strength and surface finish.
Improves workability of lean permeable mixes while keeping the open gradation — popular in sponge-city paving.
Not sure which dose fits your mix design?
Tell us the target strength, cement type and admixture system — our engineer returns a starting mix proportion, free.
Five flexible packing solutions for densified silica fume — from palletized 25kg bags to 1000kg jumbo bags — all engineered for safe container shipping and easy site handling.
25kg soluble paper bags, 42 per pallet — space-saving, forklift-friendly and fast to load into containers.
Pallets secured with stretch film for safe loading, unloading and long-distance ocean shipping.
25kg moisture-proof kraft paper bags with inner PE liner — easy to carry, ideal for construction sites.
500–1000kg plastic woven bags, 2 per pallet, with or without bottom discharge spout — built for bulk handling.
Your own logo, bag design and marking — professional OEM service to build your brand worldwide.
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+86 13109355617Email Address
ewende@microsilica-si.comIf your project is high-volume ready-mix, precast or shotcrete where freight and handling dominate, densified silica fume wins on landed cost — same ASTM C1240 strength gain at roughly half the shipping volume. Choose undensified only when peak pozzolanic activity (C80+, grouting, specialty refractory) is the deciding factor.
Yes — modern high-shear and twin-shaft mixers break the agglomerates within the normal mixing cycle, delivering the same 28-day strength gain as undensified. For very low water-cement-ratio mixes, allow a slightly longer dispersion time or use a polycarboxylate admixture.
At 600–680 kg/m³, densified fits about 2× the tonnage in the same 20' container — so freight per ton drops roughly 30–50% depending on route. On long hauls (Middle East, South America) the saving often outweighs the small activity premium.
Densified granules are already low-dust by nature. Our 25 kg bags use anti-static PE-lined paper, and the TDS includes a low-dust rip-and-pour procedure. For sensitive plants, ask about the low-dust bag variant — identical chemistry, surface-treated.
Our standard densified line is 85D–95D. For 96%+/99% purity we supply undensified (96U/99U) or a custom densified blend — tell us your target SiO₂, LOI and PSD and our engineer drafts the spec.
Yes — semi-densified 350–450 kg/m³, produced by mechanical aeration rather than compression, preserving about 90% of particle dispersion at ~35% less volume than undensified. Popular where freight per m³ is high but activity still matters.
More questions? Send us your specs and our engineer will reply within 24 hours.
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