FRC with polymer-cement matrices

The mechanics of FRC composites is very much dependent on the strength of the matrix, its modulus of elasticity and the fibre-matrix bond. Modification of these characteristics can be particularly useful for optimizing the efficiency of the fibres. A drastic change in the matrix properties can be achieved by combining the matrix with polymers, in various forms. Some attempts have been made to explore this approach, and there are some promising results, but the full potential of this combination is far from being realized. 

Combinations with polymers can be obtained by impregnation of the hardened composite (polymer impregnated concrete - PIC) or with a polymer latex which is added during mixing (latex modified cement - LMC) [137]. Both types of polymer incorporation would be expected to increase the matrix strength and the fibre-matrix bond. However, their influence on the other matrix properties is quite different. In PIC, the matrix has a higher modulus of elasticity and becomes more brittle, while in LMC the matrix will be more ductile with a lower modulus of elasticity. 

Naaman, Strain hardening and deflection hardening fiber reinforced cement composites , in A.E. Naaman and H.W. Reinhardt (eds) Fourth International Workshop on High Performance Fiber Reinforced Cement Composites (HPFRCC 4), RILEM Publications, Bagneux, France, 2003, pp. 95-113. 

JCI-DFRCC Committee, DRFRCC terminology and application concepts , J. Advanced Conors Technology. 1, 2003, 335-340. 

Mishra and H.C. Wu, Matrix design for pseudo-hardening fibre reinforced cementitious composites . Mater. Struct 28,1995, 586-595. 

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The different types of high performance systems will than be treated separately, based on classification in terms of the performance and the strategy to achieve it, to include the following topics monofibre systems with normal strength matrix, monofibre systems with high strength matrix, hybrid FRC, slip hardening fibres and FRC with polymer-cement matrices. 

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