Title:
Autogenous Shrinkage of Concrete with Super-Absorbent Polymer
Author(s):
Fazhou Wang, Yufei Zhou, Bo Peng, Zhichao Liu, and Shuguang Hu
Publication:
Materials Journal
Volume:
106
Issue:
2
Appears on pages(s):
123-127
Keywords:
compressive strength; shrinkage; super-absorbent polymer.
DOI:
10.14359/56458
Date:
3/1/2009
Abstract:
The water-release process of prewetted super-absorbent polymer (SAP) particles in cement paste is illustrated by a cracking viewer and it is found that water entrained by SAP is almost exhausted after 7 days, producing many pores in the paste structure. Meanwhile, the effects of SAP dosages and entrained water on internal relative humidity (IRH), autogenous shrinkage (AS), and compressive strength of concrete are discussed. Results indicate that incorporation of SAP obviously delays IRH decline and mitigates AS at an early age; however, it negatively influences the pore structure of cement paste. Thus, the compressive strength of concrete decreases with a higher content of SAP or entrained water.