Effects of Shrinkage Reducing Admixture (SRA) on the Tensile Behavior of Strain-Hardening Cement Composite (SHCC)

Abstract:

This research investigates the influence of shrinkage reducing admixture (SRA) on the tensile behavior of strain-hardening cement composite (SHCC). SHCC materials with specified compressive strength of 50MPa were mixed and tested. All SHCC mixes with different dosage of shrinkage reducing admixtures were reinforced with 2.2 % polyvinyl alcohol (PVA) fibers at the volume fraction. A special SRA, i.e. strontium (Sr)-based SRA, used in this study was based on a phase change material (PCM) that has the ability to absorb or release the hydration heat of cement composite. This paper focuses on the tensile behavior and cracking characteristics of SHCC materials under direct tension. The effect of a special SRA on the fresh properties, such as flow and air content, and hardened properties of SHCC materials was investigated. Test results showed that SRA reduces the air content of SHCC material. The SRA can also improve the tensile strength of SHCC material.

• Periodical: Applied Mechanics and Materials (Volume 372)
• Pages: 203-206
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.372.203
• Online since: August 2013
• Authors: Seung Ju Han, Hye Ran Kim, Hyun Do Yun
• Keywords: Direct Tensile Behavior, Shrinkage Reducing Admixture (SRA), Strain-Hardening Cement Composite (SHCC)

References

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