| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Chemical Shrinkage Model and Prediction for Early-age Slag-Cement Binder Systems |
| WU Lang1, PENG Lilin1, WANG Zele1, LI Hao1, LEI Bin2,*
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1 School of Civil Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, China 2 School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China |
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Abstract As a binary composite binder, slag-cement binder systems play a critical role in mitigating concrete volume deformation and enhancing crack resistance. In this work, an early-age chemical shrinkage model for slag-cementitious materials was developed based on the Parrot-Killoh hydration kinetics model, incorporating the volumetric changes of reactants and hydration products while accounting for the specific hydration cha-racteristics of slag. Comparative analysis with experimental data demonstrates that the proposed model can accurately predict the early-age chemical shrinkage behavior of slag-cement systems. The evolution of chemical shrinkage exhibits distinct staged characteristics over time and shows positive correlations with water-to-binder ratio, temperature, and specific surface area. This research provides a theoretical foundation for the engineering application of slag in cement-based materials.
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Published:
Online: 2026-04-16
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