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Development and Characterization of Lime-Based Mortars Modified with Graphene Nanoplatelets.
Adam Pivák1, Milena Pavlíková1, Martina Záleská1
1Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic.
Materials (Basel, Switzerland)
|October 26, 2024
Summary
Graphene nanoplatelets enhance lime-based mortars for cultural heritage conservation. These additives improve mechanical strength and durability while maintaining essential properties like porosity and water vapor transmission.
Area of Science:
- Materials Science
- Civil Engineering
- Conservation Science
Background:
- Traditional Portland cement mortars are incompatible with historic lime-based structures.
- Lime-based mortars offer better compatibility but have lower mechanical strength.
- There is a need for durable and compatible repair materials for cultural heritage.
Purpose of the Study:
- To develop enhanced lime-based mortars using graphene nanoplatelets (GNs).
- To investigate the effect of GNs on calcium lime (CL) and hydraulic lime (HL) mortars.
- To assess the suitability of GNs as a reinforcement for heritage conservation materials.
Main Methods:
- Preparation of CL and HL mortars with varying GNs dosages (0.1%, 0.3%, 0.5%).
- Mechanical testing to evaluate strength enhancement.
- Analysis of physical properties including porosity, water absorption, and drying rates.
Main Results:
- GNs significantly increased the mechanical strength of both CL and HL mortars.
- CL mortars showed enhanced heat transport with GNs, while other properties remained similar.
- HL mortars with GNs exhibited reduced porosity and altered pore size distribution.
Conclusions:
- Graphene nanoplatelets are a promising additive for reinforcing and functionalizing lime-based composites.
- The improved mechanical resistance and maintained properties of GNs-modified mortars are beneficial for building material requirements.
- This approach can potentially extend the lifespan of building constructions, particularly in heritage conservation.
Keywords:
drying rategraphene nanoplateletshydrated limehydraulic limenanoadditivestrength enhancementstructural characteristicsMore Related Videos
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