According to Dr. Deborah Frank, associate professor of pediatrics at Boston University School of Medicine, "there are small but identifiable effects of prenatal cocaine-crack exposure on certain newborn outcomes, very similar to those associated with prenatal tobacco exposure.
The study focuses on the investigation of the effect of healing agent when incorporated into the mortar matrix and the evaluation of the recovery of liquid tightness after cracking and exposure to two different healing regimes (water immersion and wet-dry cycles) through water permeability tests.
LWSCCs exhibited superior fire resistance in terms of residual strength showing formation of no major cracking (only visible hairline cracks)/spalling after exposure to elevated temperatures of up to 900 °C for a duration of 1.5 h.
The capacity of the material will be investigated to completely or partially re-seal the cracks, as a function of its composition, maximum crack width and exposure conditions.
Three experimental soil columns were used to observe crack formation by exposure to the weather and to measure the flow through them caused by artificial rainfall.
In part 1 investigation has focused on the capacity of the material to completely or partially re-seal the cracks, as a function of its composition, maximum crack width and exposure conditions.
Over time, the iron became strongly corroded and both the FeS film and the metallic iron grains began to crack leading to exposure of bare metallic iron to the solution.
It is almost impossible to produce crack-free concrete and, therefore, codes of concrete structural design (such as ACI 318 [ACI 318, Building Code Requirements for Structural Concrete, American Concrete Institute: Farmington Hills, MI, USA]) take cracking into account and relate permissible crack widths to exposure conditions.
Due to external load, the RC slab was partly cracked before the exposure to seawater.
As the thickness of TGO increases during exposure, cracks form in the TBC around imperfections at the interface.
