Construction Chemistry

CIRCOSIL® - multifunctional lightweight filler

Cirkel has been serving the buidling industry for decades with innovative product ideas and individual solutions.

CIRCOSIL® is an innovative, multifunctional Calcium-Silicate-Hydrate for versatile uses in construction chemistry formulations.

CIRCOSIL® provides a meaningful contribution to the performance of construction products. CIRCOSIL® has a unique combination of functionalities, which CIRCOSIL®can fully develop in your formulation.

So that not only the chemistry is right, all construction substances used on construction sites are ideally designed in terms of grain composition. For this Cirkel provides customised grain qualities. Our spectrum ranges from 3mm siftings to specially finely prepared materials in the µm range.


CIRCOSIL® is

  • bright white
  • synthetic mineral light aggregate
  • available in defined grain bands specially for your use
  • can be combined with all common additives

CIRCOSIL® effects

  • good water retention based on defined pore volume
  • excellent integration in cement systems due to distinctive functional surfaces
  • high level stability due to microstructuring
  • support for an even cement hydration
  • improvement in workability
  • increased yield
  • no contraction
Dr. Dennis Lewing
Productmanager - Paint and Varnish
Dr. Dennis Lewing
Manfred Zeh
Application Technology
Manfred Zeh

CIRCOSIL® - General technical details

Chemical composition 5 CaO - 6 SiO2 - 5 H2O
CalciumSilikatHydrat
Porosity 1,4 cm3/g
SiO2 55,50 % CaO 33,50 % pH value
10
Al2O3 0,43 % MgO 0,33 % specific surface (BET) 65 m2/g
Fe2O3 0,11 % Na2O < 0,02 % glow loss 10,0 %
Mn < 0,001 % Cr < 0,001 % Standard grain classes CIRCOSIL® 0,1
CIRCOSIL® 0,5 
CIRCOSIL® 1,5 
CIRCOSIL®  Grobkorn
Mineral composition
Tobermorit 88 %
embedded SiO210 %


Brightness (CieL*a*b*) L* = 93
a* = 1,0
b* = 2,45

Technical application data

Water absorption 130 %
Bulk density 340 - 490 kg/m³
Grain compression strength
(according to DIN EN 13055-1)
14,6 KN
Volume stability
(according to DIN EN 13055-1)
0,03 %
Chemical stability
  • Stable against alkalines
  • Stable against organic solvents
  • From pH < 4: slow decomposition to amorphous silicic acid and calcium salt

Particle sizes

Topcut [mm]

D50 [mm]

Cumulated sieve passability value

CIRCOSIL® 0,1 0,3 0,06 Partikelgrößen Bauchemie
CIRCOSIL® 0,5 0,7 0,3
CIRCOSIL® 1,5 1,8 1,0
CIRCOSIL®  Grobkorn 4,2 2,5

Deliverable as

CIRCOSIL® 0,1 CIRCOSIL® 1,5
CIRCOSIL® 0,5
CIRCOSIL®  Grobkorn
Loose in silo truck Loose in silo truck Loose in silo truck
1,5 m3 Q-Bag
on disposable industrial pallet
  • Weight approx. 900 kg/Q-Bag
  • Measurement including pallet
    L x B x H: 100 cm x 120 cm x
    approx. 200 cm

1 m3 Big Bag
on disposable industrial pallet

  • Weight according to graining
    approx. 550 - 700 kg/Big Bag
  • Measurement including pallet
    L x B x H: 100 cm x 120 cm x
    approx. 150 cm
1 m3 Big Bag
on disposable industrial pallet
  • Weight approx. 400 kg/Big Bag
  • Measurement including pallet
    L x B x H: 100 cm x 120 cm x
    approx. 150 cm
Paper sacks
foiled on returnable EURO-pallet
  • Sacks of 25 kg, 975 kg/pallet
  • Measurement including pallet
    L x B x H: 80 cm x 120 cm x
    approx. 200 cm
Paper sacks
foiled on returnable EURO-pallet
  • Sacks of 25 kg, 825 kg/pallet
  • Measurement including pallet
    L x B x H: 80 cm x 120 cm x
    approx. 200 cm
Paper sacks
foiled on returnable EURO-pallet
  • Sacks of 20 kg, 600 kg/pallet
  • Measurement including pallet
    L x B x H: 80 cm x 120 cm x
    approx. 180 cm
Special packaging on request

Processing information

Filling Material/
Pigment area
Cirkel GmbH & Co. KG
Werk Emsdetten
Veltrup 22 A
48282 Emsdetten 
Tel.: +49 2572 9231-0
Fax: +49 2572 9231-159
VAT number DE 127 124 151
Bank account National-Bank Recklinghausen
BLZ 360 200 30
Kto-Nr. 690 201
BIC/SWIFT NBAGDE3EXXX
Company location
Cirkel GmbH & Co. KG 
Flaesheimer Str. 605 
45721 Haltern am See 
Kommanditgesellschaft 
(Reg.-Gericht Gelsenkirchen HRA 2888) 
Persönlich haftende Gesellschafterin: 
Cirkel Beteiligungsgesellschaft mbH Haltern 
(Reg.-Gericht Gelsenkirchen HRB 11178)
IBAN DE 59 360 200 30 0 000 690 201
Customs number 3288579
Statist. Commodity code 28 39 90 00

Construction chemistry Partner

Gesund bauen
Alafix
Ardex
Grigolin
Henkel
Kiesel
Meffert
quick mix
roth
schwenk
schwepa
uzia
weber

Registry data

Register data

Safety data sheet

Test certificates

Mit dem Absenden meiner Daten erkläre ich mich damit einverstanden, dass diese von Cirkel gespeichert und zu Zwecken der Kontaktaufnahme in Bezug auf meine Anfrage, der Eigenwerbung, Terminen und Informationen verwendet werden. Personenbezogene Daten, Privatadressen und E-Mail Adressen werden selbstverständlich vertraulich behandelt und nicht an Dritte weitergegeben.

with * marked fields are mandatory

Safety data sheet

Register data

Safety data sheet

Test certificates

Mit dem Absenden meiner Daten erkläre ich mich damit einverstanden, dass diese von Cirkel gespeichert und zu Zwecken der Kontaktaufnahme in Bezug auf meine Anfrage, der Eigenwerbung, Terminen und Informationen verwendet werden. Personenbezogene Daten, Privatadressen und E-Mail Adressen werden selbstverständlich vertraulich behandelt und nicht an Dritte weitergegeben.

with * marked fields are mandatory