MasterFiber microfibers are F 70, a fibrillated product for shrinkage and temperature reinforcement; F 100, an enhanced fibrillated polypropylene product geared for shrinkage and temperature reinforcement; M 100, a high-tensile strength, high modulus of elasticity, ultra-thin monofilament homopolymer polypropylene product; plus, M 35 and M 70, monofilament polypropylene fibers engineered to reduce plastic shrinkage cracking
The researchers recommend internal curing as a convenient strategy to reduce shrinkage deformations and, consequently, shrinkage cracking
in fibre reinforced concrete, ACI Materials Journal 87(2): 138-148.
Shrinkage and restrained shrinkage cracking
of self-compacting concrete compared to conventionally vibrated concrete, Materials and Structures 42: 71-82.
It's dry - the use of plasterboard dry-lining inside the house instead of wet plaster can minimise drying-out shrinkage cracking
and it's quick to decorate.
Daly (1999) reported that restrained shrinkage-induced cracks cause 12% and 10-14% of deteriorations in the bridges in France and in Germany, respectively; in UK and Norway the shrinkage cracking
is one of the major causes of such defects.
The objectives of this study were 1) to analyze the direct relationship between shrinkage cracking
and transverse tensile characteristics in moisture saturated wood, and 2) to compare measured tensile strength with published data on the maximum shrinkage, compression yield, and relaxed compression yield stresses from the same wood species.
The role of creep to reduce induced tensile stress in restrained shrinkage has been recognised and included in methods to predict shrinkage cracking
Remember that shrinkage cracking
is cosmetic, and that the additional cost for reducing shrinkage cracking
is really only justified where appearances are critical.
Fiber reinforcement improves the performance of the concrete by protecting it from plastic shrinkage cracking
, or early cracking of the concrete in the green phase.
Concrete is subject to two types of shrinkage cracking