| Title |
Synthesis, properties, and application of rankinite in the production of CO2 cured concrete / |
| Translation of Title |
Rankinito sintezė, savybės ir panaudojimas CO2 aplinkoje kietėjančio betono gamyboje. |
| Authors |
Šmigelskytė, Agnė |
| Full Text |
|
| Pages |
108 |
| Keywords [eng] |
rankinite ; rankinite binder ; carbonation curing ; low-lime cement |
| Abstract [eng] |
In the doctoral dissertation rankinite – low-lime calcium silicate – synthesis and carbonation process was investigated and discussed. Rankinite can be used as an alternative binder with a synthesis temperature 200 °C lower than that of ordinary Portland cement clinker. The production of rankinite binder also requires 2 times less calcareous raw materials and ~20 % less fuel, which results in lower CO2 emissions, while the emitted gas can be sequestered in stable carbonates in the concrete structure during the hardening process. Due to these reasons rankinite binder is a suitable cementitious material for production of various concrete products, thus reducing the environmental impact of the cement production. After examining the synthesized binder and its carbonation hardening process, it was determined that the obtained material satisfies the essential requirements with regard to the currently existing state of the art technologies and can be characterized by the required physico-chemical and mechanical properties. Concrete with a compressive strength of ~45 MPa and high durability can be produced from rankinite binder and sand mixtures, after carbonating for relatively short time. Rankinite binder paste samples reached significantly high compressive strength values exceeding 100 MPa as a result of calcium carbonate formation and silica gel polymerization that leads to a denser microstructure and thus a higher compressive strength. |
| Dissertation Institution |
Kauno technologijos universitetas. |
| Type |
Doctoral thesis |
| Language |
English |
| Publication date |
2019 |
