Limitations of the slump test. The slump test is suitable for slumps of medium to low workability, slump in the range of 5 â 260 mm, the test fails to determine the difference in workability in stiff mixes which have zero slump, or for wet mixes that give a collapse slump. It is limited to concrete formed of aggregates of less than 38 mm (1.5 inch).
Plantar warts are caused by an infection with the human papillomavirus (HPV) in the outer layer of skin on the sole of your feet. There are more than 100 types of HPV, but only a few types are known to cause warts on your feet.lantar warts are caused by an infection with the human papillomavirus (HPV) in the outer layer of skin on the sole of your feet. There are more than 100 types of HPV, but only a few types are known to cause warts on your feet.
The HPV type 1 causes most plantar warts. The virus gains access to the skin through direct contact. It is presumed that inoculation of the skin occurs in places likely to be contaminated by others with plantar warts, like communal showers. Once infected by HPV, spontaneous resolution seems to depend on the development of immune lymphocytes that destroy the virus-infected cells. Vaccines are available to protect against certain types of genital viral infections, but there are no vaccines for the HPV types that cause plantar warts.