Effect of Super-Absorbent Polymer on Shrinkage and Permeability of Self-Compacting Concrete (SCC)

Author(s): Caijun Shi, Jianhui Liu, Kuixi Lv, Xianwei Ma, Jian Zhang, Zemei Wu
Paper category: Conference
Book Title: 8th International RILEM Symposium on Self-Compacting Concrete - SCC 2016
Editor: Kamal H. Khayat
ISBN: 978-2-35158-156-8
e-ISBN: 978-2-35158-157-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 73-88
Total Pages: 16
Language: English

Abstract: This paper investigated the influences of super-absorbent polymer (SAP) on the workability, compressive strength, early autogenous shrinkage, dry shrinkage, water absorption, and chloride ion permeability of self-compacting concrete (SCC). Three SAPs with different particle sizes (30-75, 75-125, and 125-500 microns) and four dosages (0, 0.06%, 0.12%, and 0.18%), by mass of cement, were used. The results indicated that SAP had little effect on workability and compressive strength of SCC. The compressive strength slightly decreased with the increase of SAP particle size. The early-age autogenous shrinkage of SCC was reduced by using SAP. SAP with particle size of 75-125 μm could more efficiently mitigate early-age autogenous (3 d) shrinkage and drying shrinkage of SCC. The drying shrinkage of SCC was reduced when the SAP dosage was less than 0.12%. Otherwise, the drying shrinkage was increased. The water absorption of SCC gradually increased with the increase of SAP dosage. SCC with SAP particle size in the range of 30-75 μm had the lowest water absorption and chloride ion diffusion coefficient as well. Incorporation of SAP increased the chloride ion permeability of SCC at 56 d.

Online publication: 2016
Publication Type: full_text
Public price (Euros): 0.00