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Computers and Concrete
  Volume 7, Number 1, February 2010, pages 53-62
DOI: http://dx.doi.org/10.12989/cac.2010.7.1.053
 


Performance characteristics of dredged silt and high-performance lightweight aggregate concrete
H.Y. Wang, Y.N. Sheen and M.F. Hung

 
Abstract     [Full Text]
    Dredged silt from reservoirs in southern Taiwan was sintered to make lightweight aggregates (LWA), which were then used to produce high-performance lightweight aggregate concrete (HPLWC). The HPLWC was manufactured using different amounts of mixing water (140, 150, and 160 kg/m3) and LWA of different particle densities (700, 1100, and 1500 kg/m3) at different W/b ratios (0.28, 0.32, and 0.4). Results show that the lightweight aggregates of dredged silt taken in southern Taiwan perform better than the general lightweight aggregates. In addition, the HPLWC possessed high workability with a slump of 230-270 mm, and a slump flow of 450-610 mm, high compressive strength of over 40 MPa after 28 days of curing, good strength efficiency of cement exceeding 0.1MPa/kg/m3, low thermal conductivity of 0.4-0.8 kcal/mhoC, shrinkage of less than 4.8
 
Key Words
    dredged silt; high-performance lightweight aggregate concrete (HPLWC); workability; durability.
 
Address
H.Y. Wang and Y.N. Sheen: Dept. of Civil Engineering, National Kaohsiung University of Applied Sciences,Kaohsiung, Taiwan, R.O.C.
M.F. Hung: Dept. of Civil Engineering, De-Lin Institute of Technology, Taipei, Taiwan, R.O.C.
 

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