Roads and Bridges - Drogi i Mosty
17, 3, 2018, 205-214

The effect of nano-CaCO3 on the mechanical properties and permeability of roller compacted concrete pavement (RCCP)

Shahab HasaniNasab Mail
Razi University, Faculty of Engineering, Department of Civil Engineering, Tagh Bostan, 67149, Kermanshah, Iran
Mohammad Hassan Jebur Mail
Razi University, Faculty of Engineering, Department of Civil Engineering, Tagh Bostan, 67149, Kermanshah, Iran
Hassan Sharafi Mail
Razi University, Faculty of Engineering, Department of Civil Engineering, Tagh Bostan, 67149, Kermanshah, Iran
Published: 2018-09-30

Abstract

The paper presents the investigations of the mechanical properties water absorption and porosity of the roller compacted concrete pavements (RCCP) with different amounts of nano-CaCO3. The nano-particles of CaCO3 were partially added to RCCP, and the mechanical properties of the specimens were measured. The results indicate that nano-CaCO3 can improve the compressive strength and the tensile splitting strength of RCCP. The nano-CaCO3 used up to 1% as a partial replacement for cement can accelerate the C-S-H gel formation at the early ages of hydration. This is due to increased crystalline Ca(OH)2 amount during the early ages of hydration. Increasing nano-CaCO3 content by more than 1% decreases the compressive and tensile splitting strength, and increases water absorption and permeability. The addition of CaCO3 nano-particles may increase C-S-H content, which improves the mechanical properties of concrete, fills the concrete pores, and decreases water absorption and permeable voids volume.

Keywords


mechanical properties, nano-CaCO₃, permeability, roller compacted concrete pavements.

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References


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The effect of nano-CaCO3 on the mechanical properties and permeability of roller compacted concrete pavement (RCCP)

  
HasaniNasab, Shahab; Jebur, Mohammad Hassan; Sharafi, Hassan. The effect of nano-CaCO3 on the mechanical properties and permeability of roller compacted concrete pavement (RCCP). Roads and Bridges - Drogi i Mosty, [S.l.], v. 17, n. 3, p. 205-214, sep. 2018. ISSN 2449-769X. Available at: <>. Date accessed: 19 Nov. 2018. doi:http://dx.doi.org/10.7409/rabdim.018.013.