Related Experiment Video
Updated: Jan 13, 2026

Sandy Soil Improvement through Microbially Induced Calcite Precipitation MICP by Immersion
Published on: September 12, 2019
Development of Passive Fire Protection Materials Based on Calcium Magnesium Phosphate Cements and Perlite
Georgiana-Florina Badea1, Alina-Ioana Badanoiu1,2, Georgeta Voicu1,2
1Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology Politehnica Bucharest, 1-7 Gh. Polizu, 011061 Bucharest, Romania.
Calcium magnesium phosphate cements (CMPCs) offer fire protection for steel. These novel cements, derived from treated dolomite and fly ash, demonstrated significant thermal resistance when applied to steel plates.
Area of Science:
- Materials Science
- Civil Engineering
- Chemical Engineering
Background:
- Calcium magnesium phosphate cements (CMPCs) are advanced materials with potential applications in construction.
- Dolomite and fly ash are abundant industrial byproducts that can be utilized as precursors for cementitious materials.
Purpose of the Study:
- To investigate the synthesis and properties of CMPCs derived from thermally treated dolomite and fly ash.
- To evaluate the fire resistance performance of CMPCs when applied to steel substrates.
Main Methods:
- Dolomite was thermally treated alone or with fly ash at 750 °C and 1200 °C.
- CMPCs were prepared by mixing precursors with KH2PO4 solution and borax.
- Setting time, compressive strength, XRD analysis, and fire resistance tests were conducted.
- Material compatibility with steel was assessed using SEM.
Main Results:
- Thermal treatment of dolomite produced MgO and CaCO3, while higher temperatures with fly ash formed calcium aluminum silicates and calcium magnesium silicates.
- CMPCs exhibited varying setting times and compressive strengths depending on precursor composition and thermal treatment.
- CMPC pastes and composites with perlite showed good fire resistance, significantly slowing the temperature increase of steel plates exposed to flame for up to 60 minutes.
- SEM analysis confirmed the compatibility of CMPCs with the steel substrate.
Conclusions:
- CMPCs synthesized from thermally treated dolomite and fly ash show promise as fire-protective coatings for steel structures.
- The developed CMPCs offer a viable solution for enhancing the fire safety of steel elements in buildings and infrastructure.
- Further research can optimize CMPC formulations for enhanced performance and broader application in fire protection.
More Related Videos
11:14Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
Published on: February 21, 2017
08:29Multi-material Ceramic-Based Components – Additive Manufacturing of Black-and-white Zirconia Components by Thermoplastic 3D-Printing (CerAM - T3DP)
Published on: January 7, 2019
Related Concept Videos
Pozzolans
Fly ash is...
Masonry in Cold and Hot Weather Conditions
Other key practices include keeping masonry units...
Thermal Insulation in Masonry Walls
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh....
Types of Cement II
Strength and Heat of Hydration
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
Efflorescence in Masonry
While initial efflorescence is common post-construction and can be cleaned with water and a brush, in certain instances, efflorescence can reappear and gradually diminish over time as salts are leached out...