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Polycarboxylate Superplasticizer-Modified Graphene Oxide: Dispersion and Performance Enhancement in Cement Paste
Haiming Zhang1, Xingyu Gan1, Zeyu Lu2
1Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China.
Nanomaterials (Basel, Switzerland)
|March 26, 2025
Summary
Polycarboxylate superplasticizer improves graphene oxide dispersion in cement paste. This enhances mechanical strength, reduces carbon emissions, and accelerates hydration for advanced cementitious materials.
Area of Science:
- Materials Science
- Nanotechnology
- Civil Engineering
Background:
- Graphene oxide (GO) enhances cement hydration but faces dispersion challenges due to Ca2+ complexation.
- Improving GO dispersibility is crucial for maximizing its reinforcing potential in cementitious composites.
Purpose of the Study:
- To enhance graphene oxide (GO) dispersion in cement paste using polycarboxylate (PC) superplasticizer.
- To investigate the impact of PC-modified GO (PC@GO) on cement paste rheology, carbon emissions, mechanical properties, and hydration.
- To evaluate PC@GO as a strategy for developing high-performance cementitious materials.
Main Methods:
- Graphene oxide (GO) was modified with polycarboxylate (PC) superplasticizer to create PC@GO.
- PC was divided into two parts: one for GO modification and the other as a water-reducing agent.
- The rheological, mechanical, hydration, and microstructural properties of cement paste containing PC@GO were analyzed.
Main Results:
- PC modification significantly improved GO dispersion in cement paste.
- Cement paste with PC@GO showed enhanced flexural (23.7%) and compressive (12.6%) strength after 7 days.
- Carbon-to-strength ratio decreased by 14.8%, hydration accelerated by 7.50%, and water absorption/porosity reduced by 35.2%/45.3%.
Conclusions:
- PC@GO effectively overcomes GO agglomeration issues in cement paste.
- The enhanced dispersion and properties of PC@GO lead to superior cementitious material performance.
- PC@GO is a promising additive for developing high-performance, sustainable cementitious materials.
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