Influence of shrinkage-reducing agent and polypropylene fiber on shrinkage of ceramsite concrete. (20th January 2018)

• Record Type: Journal Article
• Authors: Gong, Jianqing; Zeng, Wei; Zhang, Wenjie
• Is Part Of: Construction & building materials. Volume 159(2018)
• Page Start: 155
• Page End: 163
• Publication Date: 2018-01-20
• Subjects: Shrinkage-reducing agent -- Polypropylene fiber -- Ceramsite concrete -- Self-shrinkage -- Drying shrinkage; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2017.10.064
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Investigation on both the self-shrinkage and drying shrinkage of CC. Combination of PPF and SRA to reduce shrinkage. Determination of the optimum mix proportion based on balancing shrinkage reduction and early excessive expansion exclusion. Abstract: This paper reports a study done on the impact of a shrinkage-reducing agent (SRA) and polypropylene fiber (PPF), individually and jointly, on ceramsite concrete (CC). The results indicate the following: (1) CC mixed with SRA alone, results in early micro-expansion increases as SRA content increases while self-shrinkage and drying shrinkage decreases. (2) CC mixed only PPF, results in early micro-expansion, self-shrinkage and drying shrinkage decreases as PPF content increases; amplitude decrease is large for early micro-expansion, but insignificant for self-shrinkage and drying-shrinkage, and shrinkage reduction is smaller compared to SRA. (3) If an SRA-PPF mix is added to CC, both contributed significantly to self-shrinkage, drying shrinkage, and reduction.