CAS Composite Anode Systems (CAS) focuses on rehabilitating and maintaining concrete structures endangered by the corrosion of the steel reinforcement. CAS has an extensive knowledge base in the material science of building materials, innovative alumo-silicate based cements and binders, steel corrosion in concrete, and the beneficial use of carbon-quantum dots in building materials.

CAS attaches great importance to the sustainability of the by CAS proposed and employed technologies:

- minimize traffic disturbances and impediments
- create minimum traffic in applying the technologies
- use of sustainable materials and products
- create minimum, preferentially 0-waste by applying the technologies
- prolong service time of concrete structures at low costs with high reliability.

CAS developed a series of technologies that are within the scope of the above specifications:

The CAST^Q Composite Quantum Anode System for the cathodic corrosion protection (CP) of steel in concrete:

The CAST^Q Composite Quantum Anode System consists of the electrically conductive CAST^Q Composite-Quantum-Anode paint and the QAP 60 Quantum Anode Primer, forming a durable composite matrix with the concrete subsurface. The CAST^Q Composite-Quantum-Anode-System is formed by applying the QAP 60 Quantum Anode Primer and, subsequently, the Composite-Quantum-Anode Paint on the concrete surface. Doping of the CAST^Q Composite-Quantum-Anode paint and the QAP 60 Quantum Anode Primer with Carbon Quantum Dots proved to be highly beneficial for CP performance and the polarization of the reinforcing steel.

·25 years Composite Microcapillary Matrix

The Embedded Zinc Anode (EZ-Anode) System for the galvanic corrosion protection of steel in concrete:

The EZ-Anode System is a galvanic zinc anode embedded into a solid alumo-silicate based QEZAC electrolyte, applied to the concrete surface. The QEZAC binder is a shrinkage-controlled geopolymeric binder containing admixed Carbon Quantum Dots (CQDs) formulated for Embedding Zinc Anode cement. The admixed Carbon Quantum Dots (CQDs) specifically increase the galvanic activity of the EZ-anode, as well as adhesion strength and ionic conductivity due to their versatile surface and superior electron transfer capability. The QEZAC binder is preferentially applied like a fine putty to uncoated concrete surfaces. It forms a matrix with excellent adhesion to concrete surfaces characterized by a volumetric porosity of > 35 %, high ionic conductivity, and high durability.

As proved by LIPS (laser-induced plasma spectroscopy), the chlorides migrate towards the EZ-anode. They are chemically immobilized in the QEZAC binder matrix as Simonkolleite (zinc-hydroxo-chloride). This natural mineral leads to a one-directional diffusion/migration of the chlorides and results in an efficient galvanic chloride extraction of the concrete overlay.

 Evaluation of Ion Migration by LIPS

Carbon Quantum Dots (CQD’s) as admixture for electrochemical concrete rehabilitation systems.

CAS developed a proprietary technology for synthesizing Carbon Quantum Dots (CQDs) with a mean diameter of 3 nm. The admixed Carbon Quantum Dots (CQDs) specifically increase the activity of anodes (galvanic and impressed current), increase the ionic conductivity of the concrete matrix, increase the polarizability of the reinforcing steel, and increase adhesion strength due to their versatile surface and superior electron transfer capability.

Tectoalumosilicate (TASC) binder as an ionically conductive and acid resistant (pH -0,5) glue and concrete liner

MACROCELL SENSOR for the online monitoring and automated control of CP installations

 EFFECT OF CATHODIC PROTECTION ON MACROCELL CURRENTS

 TDS Macrocell Sensor

 Macrocell Data-Converter