Quiz 14 "The two faces of the one shower of komme concrete and precast concrete"

 Quiz 14 'The two faces of the one shower of komme concrete and precast concrete'

We invite you to the next quiz in the # EdukacjazBranżą TWO FACES, ONE FUTURE OF CELLULAR CONCRETE AND PREFABRICATION OF CONCRETE organized by the Concrete Producers and Builder Association

The first three people who send correct answers to the questions to the following address: b4f@buildercorp.pl, will receive advertising gadgets of SPB members.

Concrete prefabrication

Which type of cement should be used in the production of prefabricated prestressed bridge beams to obtain the guaranteed concrete strength (approx. 70-80% of the final strength) after approx. 20 hours from forming, so that the element is safely compressed (cut the ropes)?

a) CEM I 52.5N SR3 /

b) CEM III / B 42.5L-LH / SR / NA

 

Aerated concrete

Why is aerated concrete the material with one of the lowest content of natural radiation among building materials?