期刊
CEMENT & CONCRETE COMPOSITES
卷 80, 期 -, 页码 175-189出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2017.03.007
关键词
Limestone filler; Self-consolidating concrete; Calcium mono-carboaluminate; Compressive strength; Durability
资金
- Ministry of Transportation of Ontario Highway Infrastructure Innovations Funding Programme
This paper describes a laboratory program to investigate the influence of cement and limestone filler (LF) particle size on the hardened properties and durability performance of steam cured self-consolidating concrete. In addition, the interplay between cement type and LF particle size was investigated. CSA (Canadian Standards Association) Type GU (General Use) and HE (High Early-strength) cements were used with 5% silica fume (SF) [1]. The water-to-cement ratio was 0.34. LF with two nominal particle sizes of 17 gm and 3 gm, which correspond to Blaine fineness of 475 and 1125 m(2)/kg, respectively, were used. In addition to fresh concrete properties, hardened properties including compressive strength, elastic modulus, ultrasonic pulse velocity and density were measured at 12 h and 16 h, and at 3, 7 and 28 days. Indicators of durability performance including rapid chloride permeability testing (RCPT), sulfate resistance, linear shrinkage, salt scaling resistance and freeze-thaw resistance were evaluated. The results showed that LF improved the 12 and 16-h strength with no influence on later age strength (i.e., 3-28 days). The linear shrinkage and RCPT decreased with the addition of LE This reduction was linked to the production of calcium mono-carboaluminate. LF did not impact the sulfate resistance, salt scaling resistance or freeze-thaw resistance of concrete. (C) 2017 Elsevier Ltd. All rights reserved.
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