4Nemkumar B, Sylvie D. Carbon and steel microfiber reinforced cement based composites for thin repairs [J]. Journal of Materials in Civil Engineering, 1994,6( 1 ) : 88 - 99.
5Sun W, Chen H S, Luo X, et al. The effect of hybrid fibers and expansive agent on the shrinkage and permeability of high-performance concrete [ J ]. Cement and Concrete Composites, 2001,31(4) : 595- 601.
6Xu G, Magnani S, Hannant D J. Durability of hybrid polypropylene glass fiber cement corrugated sheets [J]. Cement and Concrete Composites, 1998,20 ( 1 ) : 79 - 84.
7Banthia N, Sappakittipakorn M. Toughness enhancement in steel fiber reinforced concrete through fiber hybridization[J]. Cement and Concrete Research, 2007, 37(9) : 1366 - 1372.
8Qian C x, Stroeven P. Development of hybrid polypropylene-steel fiber reinforced concrete [J]. Cement and Concrete Research, 2000,30( 1 ) : 63 -69.
9Chen B, Liu J Y. Contribution of hybrid fibers on the properties of the high-strength lightweight concrete having good workability [J]. Cement and Concrete Research, 2005,35(5) : 913-917.
10American Society of Testing and Materials. ASTM C1018 Standard test method for flexural toughness and first-crack strength of fiber reinfored concrete (using beam with third-point loading ) [S]. Philadelphia USA:ASTM, 1998:506-513.
