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Characterisation of Rubber Concrete

It has been well studied in fracture physics that one way to help resist or slow the cracking process as described previously in a brittle material like concrete is to add soft reinforcement into the material. The theory is that those soft particles can reduce stress concentration at the vicinity of air voids or micro-cracks so as to prevent, or more precisely. [Pg.392]

It should be mentioned that this model may not be universally true for representing the thermal behaviour of rubber concrete. Other models such as parallel connection may also be appropriate. It may take a lengthy discussion to quantify the modelling applicability, but the point to be made here is that for rubber concrete, internal stress/pressure build-up, which could be developed in controlled concrete, may be mitigated because of the presence of rubber particles inside. [Pg.393]

Ej (rubber) has a typical value range between 1 MPa to 14 MPa, and so does E2 (concrete) having a typical value range between 24 GPa to 34 GPa. The coefficient of thermal expansion for rubber (oj) and concrete (02) is set to be the same. [Pg.394]

Based on what is discussed in this section, and the physics and engineering properties of rubber and concrete, the characteristics of rubber concrete may be deduced as  [Pg.395]

So far the observation and laboratory test results generally support the characteristics listed above. For example, 0.02% dry shrinkage, 0.6% failure strain, 20-50% reduction in the coefficient of thermal expansion [11] have been achieved. The increase of energy absorption is 20% or higher in comparison with controlled concrete [5]. [Pg.395]


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