A Method for Internal Curing Water Calculation of Concrete with Super Absorbent Polymer

The internal curing method is effective in reducing the self-desiccation of concrete, and the amount of internal curing water (IC water) is greatly important to the shrinkage and strength of concrete. A method for calculating IC water of concrete with and without mineral admixture has been developed...

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Bibliographic Details
Published in:Advances in civil engineering 2021, Vol.2021 (1)
Main Authors: Zhang, Shouqi, Lu, Zhenbao, Li, Yongxin, Ang, Yuan, Zhang, Kechao
Format: Article
Language:English
Subjects:
Absorbents
Calcium hydroxide
Cement
Cement hydration
Cement paste
Chemical reactions
Civil engineering
Compressive strength
Concrete mixing
Curing
Desiccation
Humidity
Image analysis
Mercury
Methods
Moisture content
Phase distribution
Polymers
Porosity
Relative humidity
Shrinkage
Slaked lime
Superabsorbent polymers
Water content
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Summary:The internal curing method is effective in reducing the self-desiccation of concrete, and the amount of internal curing water (IC water) is greatly important to the shrinkage and strength of concrete. A method for calculating IC water of concrete with and without mineral admixture has been developed. The method is derived from Powers’ model for the phase distribution of a hydrating cement paste. To verify the method, a series of autogenous shrinkage and compressive strength of concrete with and without super absorbent polymer (SAP) were evaluated compared with the method proposed previously. To explain the macro performance of hardened concrete, the nonevaporable water content and calcium hydroxide content measurement were utilized to evaluate the degree of hydration of cement pastes. And, mercury intrusion method and image analysis method were used to explore the pore structure in hardened cement pastes and air void characteristics in hardened concrete, respectively. Furthermore, the evolution process was also studied for the relative humidity inside the concrete.
ISSN:1687-8086
1687-8094
DOI:10.1155/2021/6645976