Abstract
An 18 year test programme has been completed on the tensile stress-strain performance of cement composites reinforced with two types of polypropylene fibrillated networks. Three storage conditions have been used —natural weathering storage inside in laboratory air, and under water storage. Some composites have been precracked before exposure and others left uncracked before testing. The parameters measured included the elastic modulus and cracking stress of the matrix, complete tensile stress-strain curves and crack distribution in the composite, and the effects of the different weathering conditions on the tensile strength, strain to failure and bond strength of the polypropylene reinforcement.
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