The present investigation shows new development on assembled permanent formwork using ultra high toughness cementitious composites with low permeability and high crack resistance. A bidirectional keel formwork is designed to act as surface cover to prevent corrosion of steel reinforcements for structures under aggressive environment. Main attention is focused on mechanical aspects of a reinforced concrete specimen made with permanent formwork in this article. The flexural behavior of specimen is measured with four-point bending test and experimental results are then presented. A method is proposed to predict the load capacity and displacement of specimen and theoretical prediction shows a coincidence with test results. Furthermore, a series of design details and suggestions are discussed. The results of this investigation show that specimen made by ultra high toughness cementitious composite assembled permanent formwork presents higher load-carrying capacity and more ductile behavior compared with reinforced concrete specimen.
AhmedSFUMihashiH (2007) A review on durability properties of strain hardening fiber-reinforced cementitious composites (SHFRCC). Cement and Concrete Composites29(5): 365–376.
2.
BenturADiamondSBerkeN (1997) Steel Corrosion in Concrete: Fundamentals and Civil Engineering Practice. London: E & FN Spon.
3.
JinQLeungCKYYuC (2013) Effective joining method for pseudo-ductile permanent formwork. Materials and Structures46(3): 345–360.
4.
LepechMDLiVC (2005) Durability and long term performance of engineered cementitious composites. In: Proceedings of International RILEM Workshop on High Performance Fiber Reinforced Cementitious Composites in Structural Applications, Honolulu, HI: RILEM Publications SARL, pp. 165–174.
5.
LepechMDLiVC (2006) Long term durability performance of engineered cementitious composites. Restoration of Buildings and Monuments12(2): 119–132.
6.
LeungCKYCaoQ (2010) Development of pseudo-ductile permanent formwork for durable concrete structures. Materials and Structures43(7): 993–1007.
7.
LiHXuS (2009) Tensile and flexural properties of ultra high toughness cementitious composite. Journal of Wuhan University of Technology: Materials Science Edition24(4): 677–683.
8.
LiHXuS (2011) Determination of energy consumption in the fracture plane of ultra high toughness cementitious composite with direct tension test. Engineering Fracture Mechanics78(9): 1895–1905.
9.
LiHLeungCKYXuS. (2009) Potential use of strain hardening ECC in permanent formwork with small scale flexural beams. Journal of Wuhan University of Technology: Materials Science Edition24(3): 482–487.
10.
LiVCLeungCKY (1992) Steady state and multiple cracking of Short random fiber composites. Journal of Engineering Mechanics188(11): 2246–2264.
MaalejMAhmedSFUParamasivamP (2002) Corrosion durability and structural response of functionally-graded concrete beams. Journal of Advanced Concrete Technology1(3): 307–316.
13.
SahmaranMLiVC (2008) Durability of mechanically loaded engineered cementitious composites under highly alkaline environment. Cement and Concrete Composites30(2): 72–81.
14.
SahmaranMLachemiMLiVC (2009) Assessing the durability of engineered cementitious composites under freezing and thawing cycles. Journal of ASTM International6(7): 1–13.
15.
SahmaranMLiMLiVC (2007) Transport properties of engineered cementitious composites under chloride exposure. ACI Materials Journal104(6): 604–611.
16.
TakewakaKYamaguchiTMaedaS (2003) Simulation models for deterioration of concrete structures due to chloride attack. Journal of Advanced Concrete Technology1(2): 139–146.
17.
WangKJansenDShahS. (1997) Permeability study of cracked concrete. Cement and Concrete Research27(3): 381–393.
18.
WangN (2011) Experimental research on bonding mechanical performance between ultra high toughness cementitious composites (UHTCC) and existing concrete. PhD Thesis, Dalian University of Technology, Dalian, China, 2011 (in Chinese).
19.
XuSCaiX (2010a) Experimental study and theoretical models on compressive properties of ultra high toughness cementitious composites. Journal of Materials in Civil Engineering22(10): 1067–1077.
20.
XuSCaiX (2010b) Mechanics behavior of ultra high toughness cementitious composites after freezing and thawing. Journal of Wuhan University of Technology: Materials Science Edition25(3): 509–514.
21.
XuSLiQ (2009) Theoretical analysis on bending behavior of functionally graded composite beam crack-controlled by ultrahigh toughness cementitious composites. Science in China Series E: Technological Sciences52(2): 363–378.
22.
XuSLiQ (2010) Basic Application of Ultra High Toughness Cementitious Composites in Advanced Engineering Structures. Beijing, China: China Science Press (in Chinese).
23.
XuSLiuZ (2010) Dry shrinkage and crack resistance properties of ultra high toughness cementitious composites. Journal of Hydraulic Engineering41(12): 1491–1496 (in Chinese).
24.
YangYLepechMDYangEH. (2009) Autogenous healing of engineered cementitious composites under wet-dry cycles. Cement and Concrete Research39(5): 382–390.
