CSA Binder (CSA cement clinker)

CSA Binder is a hydraulic binder based on calcium sulphoaluminate, rather than calcium
aluminates which are the basis of Calcium Aluminates Cement or calcium silicates which
are the basis of Portland Cement. The difference gives CSA Binder properties particularly
suited to formulators of products such as self-leveling or self-smoothing compounds, rapid
hardening screeds, tile adhesives, non-shrink grouts, rapid setting and special mortars.

CSA Binder is used in formulated products either as a hydraulic binder by itself or with the
addition of calcium sulphates or in combination with Portland cement. The setting time is
quicker than that of Portland cement, and it also has a rapid strength development. CSA
BINDER does not release free lime during hydration thus eliminates the major cause of
efflorescence.

CSA Binder is manufactured under a strict quality assurance systems GB/T 19001-2000
(i.e. ISO9001:2000) and GB/T 24001-1996 (i.e. ISO 14001:1996)) which accommodates
the technical requirements of building chemistry formulators.

CSA Binder is normally supplied in one-ton bag which include a moister resistant barrier.
However, in common with all hydraulic binders CSA Binder must be kept from moisture,
and can retain its properties for up to six months when properly stored.

The properties of CSA Binder conform to the standards of the manufacturer and to the
Chinese relevant standards.

Properties

Hydraulic Properties

The characteristics of CSA Binder have been tested in accordance with the Chinese
standards: GB20472-2006.

Setting time determined at 20℃, using Vicat needle according to GB/T 1346-2001.
Mechanical strength at 20℃, 95% relative humidity according to GB20472-2006 .
Specification Limit:

  Ages          1 day 3 days 7 days
    Item        Flexural  Strength (Mpa)
CSA-72.5     > 6.0 > 8.0 > 9.0
CSA-82.5    > 7.0 > 9.0 > 10.0
CSA-92.5   > 8.0 > 10.0 > 11.0
               Compressive  Strength (Mpa)
CSA-72.5   > 50.0 > 65.0 > 75.0
CSA-82.5   > 50.0 > 75.0 > 85.0
CSA-92.5   > 60.0 > 85.0 > 95.0

Initial Setting time > 10 Min Final Setting time < 350 Min
Additional information
(This information is given for reference only.)
Mineral composition
C=CaO, A=Al2O3, S=SiO2 , F=Fe2O3, S =SO3
?Principal mineral phase: calcium sulphoaluminate C4 A3 S

?Secondary phases: C2S, C4AF

Reactivity with Portland cement

CSA Binder may be used in combination with other mineral products, for example
Portland cement, calcium sulphates and fillers, or with organics such as polymers in latex
foam or in redispersiblefoam.

Depending on the type of mixes and technology employed, CSA Binder can be used to
obtain and control various properties.

The behavior of Portland cement is vary variable. In general, acceleration of set increases
progressively with the addition of CSA Binder. The amount of CSA Binder needed to
obtain a specific setting time varies considerably depending on the origin of the Portland
cement and performance can be modified with the use of additives.

The strength development of CSA Binder/Portland cement and/or Calcium Sulphates
depend on the nature of the Portland cement and/or Calcium Sulphates used. In general
these mixes will develop mechanical strength at a very early stage (several hours). With
some type of Portland cements and in formulated products containing additives which
control the setting and hydration, the long term properties is similar to those of the original
Portland cement, however it is necessary to check the behavior of each Portland cement
used.

The characteristics of Portland cement to be considered are:
C3A content
Mineral admixture type and content
Type of Calcium Sulphate used
Additives will also influence the properties of these mixes:
Setting time
Rheology
Mechanical performance

Chemical Analysis Data

The chemical analysis of CSA Binder has been determined according to the following:
GB/T 176-1996 Methods of chemical analysis for cement
Main Constituents (%)
Fineness
Specific Surface Area: according to standard GB/T 8074-2008:
Usual range: 360~430 m2/kg, Specification limit: >360 m2/kg;
Usual range: 450~500 m2/kg, Specification limit: >450 m2/kg.

Applications

These properties are applied to obtain a wide range of products:
Fast setting cements
Rapid hardening mortars
Tile adhesives
Self-leveling compounds
Non-shrink grouts
Water stopping mortars
etc.

With a careful selection of the constituents (OPC, calcium sulphates, additives), it is
possible to create mixes with a range of different hydraulic properties:
Adjustable setting time
Rheology adapted to the application
High early strength
High long term strength
Shrinkage compensation

Use of Additives

CSA Binder may be used in combination with chemical additives such as:
polymers, either in latex form or redispersible powder form
Defoamers
Retarders
Accelerators
Plasticizers/superplasticizers
Rheology modifiers
Fibers,etc

Specification
Limit        SiO2    Al2O3    Fe2O3  CaO      MgO   TiO2     SO3
CSA-72.5 ≤ 10.5 ≥ 34.0 1.5-3.5 41.5-43.5 ≤ 3.5 1.0-2.0 7.5-9.5
CSA-82.5 ≤ 8.5 ≥ 35.0 1.5-3.5 40.5-42.5 ≤ 3.5 1.0-2.0 8.0-10.0
CSA-92.5 ≤ 7.0 ≥ 36.0 1.5-2.5 40.0-41.5 ≤ 3.5 1.0-2.0 8.5-11.0

 For more informations, please contact: csacement(at)