Cement-Based Materials with Dolomite Additives

Cementitious systems incorporating dolomite—an abundant carbonate mineral composed of calcium magnesium carbonate—have attracted increasing attention as a route to enhance mechanical performance, durability and sustainability. Dolomite can act both as a reactive filler and a nucleation aid, modifying hydration kinetics and refining microstructure. In blended Portland cement, finely ground dolomite promotes the formation of carboaluminate phases and may retard initial setting through competitive adsorption on alite surfaces. In alkali-activated systems, dolomite contributes Ca2+ and Mg2+ ions that participate in geopolymerisation, yielding calcium-silicate-hydrate and magnesium-silicate-hydrate gels with improved toughness. Applications span high-strength precast elements, frost-resistant concrete and self-compacting mixtures, where dolomite enhances freeze-thaw resilience, optimises yield stress relationships and reduces reliance on clinker. Recent advances in microstructural characterisation have clarified in situ carbonate crystallisation and layered double hydroxide formation, underscoring dolomite’s dual role as both inert filler and chemically active component. Such insights support rational design of low-carbon binders and novel composite mortars with tailored performance profiles.

Research from Nature Portfolio

Recent studies have demonstrated that alkali activation of dolomite dust within emulsified-asphalt composites markedly boosts mechanical strength and toughness. By varying alkali concentration and emulsified-asphalt content, researchers achieved seven-day compressive strengths approaching 77 MPa and bending strengths over 28 MPa. Microstructural analyses via scanning electron microscopy and X-ray diffraction revealed the in situ formation of calcium carbonate clusters at the asphalt–skeleton interface, which expand contact area and improve demulsification and bonding. These findings introduce a strategy for high-toughness geopolymer-asphalt materials and underscore the importance of controlled carbonate precipitation in activated systems.

Research from all publishers

Investigations into fly-ash-based alkali-activated binders have shown that incorporating 10 % dolomite powder alongside tile waste accelerates early setting and enhances compressive strength without compromising workability. Microanalysis confirmed the presence of C–S–H, C–A–S–H and M–S–H gel phases. Parallel work on self-compacting mixtures has quantified how dolomite powder content and particle packing affect the yield stress relationship between paste and mortar, yielding an improved predictive model with sensitivity parameter n varying linearly with paste packing density. In Portland cement systems, finely tuned dosages (0.5–2.5 % by weight) of light-burned dolomite significantly increased flexural and compressive strength at all ages. Reaction of MgO to Mg(OH)2 and formation of hydrated calcium carboaluminate were identified as key mechanisms preventing deleterious phase transformations.

Cement-Based Materials with Dolomite Additives publication trend

The graph below shows the total number of articles in cement-based materials with dolomite additives across all publications each year (not limited to Nature Index journals).

Technical terms

Dolomite: A carbonate mineral (CaMg(CO3)2) used as a filler or reactive additive in cementitious systems.

Alkali activation: Chemical process where precursors (e.g., fly ash, dolomite) react with alkaline solutions to form cementitious gels.

Hydrotalcite-like phase: Layered double hydroxide comprising magnesium and aluminium, formed in hydrated cement matrices.

Self-compacting mortar: Highly flowable cementitious mixture that consolidates under its own weight without external vibration.

Compressive strength: Maximum axial load per unit area a material can withstand before failure under compression.

References

1. Enhanced mechanical properties of alkali-activated dolomite dust emulsified asphalt composites. Scientific Reports (2024).
2. Properties of flyash-dolomite powder-mangalore tile waste powder based alkali-activated binder cured in ambient condition. Emergent Materials (2024).
3. An Innovative Material with Strong Frost Resistance—Concrete Containing Dolomite Powder. Materials (2022).
4. Formation and evolution of the hydrotalcite-like phase during ageing of dolomite-cement mortars under various conditions. Acta Chimica Slovenica (2023).
5. Influence of Fineness Levels and Dosages of Light-Burned Dolomite on Portland Cement Performance. Materials (2022).
6. The Effects of Dolomite Powder Content and Type on the Yield Stress Relationship between Self-Compacting Mortar and Paste. Buildings (2024).