Effect of fibers on expansion of concrete with a large amount of high f-CaO fly ash

• Published in: Cement and concrete research Vol. 33; no. 10; pp. 1549 - 1552
• Main Authors: Chen, Bing, Liu, Juanyu
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Ltd 01.10.2003; Elsevier Science
• Subjects: Applied sciences; Buildings. Public works; CaO; Cement; Cement concrete constituents; Cements; Composition (specifications, compliance criterid, standards, certification, control, patents, etc.); Concretes. Mortars. Grouts; Exact sciences and technology; Expansion; Fiber; Fly ash; General (composition, classification, performance, standards, patents, etc.); Materials; Other special applications (sand concrete, roller compacted concrete, heavy concrete, architectural concrete, etc.); CaO; Fly ash; Expansion; Cement; Fiber; Lime; Elastic modulus; Formulation; Cement paste; Concrete; Volume expansion; Experimental study
• ISSN: 0008-8846; 1873-3948
• DOI: 10.1016/S0008-8846(03)00098-X

The effects of different types of fibers on expansion of cement paste, in which a large amount of high content of f-CaO fly ash (HFA) was added, were investigated and the way to prevent cement paste with HFA from expansion was proposed. The results showed that the effects of different fibers on expansion of cement paste are related to the properties of fibers. Carbon fiber and alkali-resistant glass fiber, which have high elastic modulus, can effectively restrain the expansion, while nylon fiber with low elastic modulus has no restraint effect on the expansion. In addition, the restraint effect of alkali-resistant glass fiber increases with the increase of fiber content.