16 Questions
What is one of the main weaknesses of concrete?
Resistance to tensile forces
What is used to overcome the weaknesses of concrete in resisting tensile forces?
Reinforcing bars of steel
What property of concrete makes it brittle in nature?
Weakness in resisting tensile forces
In the case of prestressed concrete, what is used to overcome the weaknesses?
High strength steel wires
What has given expression to man's imagination and sense of elegance in concrete structures?
The utility and elegance of concrete structures
What presents challenges for the construction engineer regarding concrete structures?
Study of the conditions and assessment of efficiency
What is the primary focus of the study mentioned in the text?
The causes of short-lived structuring of contemporary buildings
During which period did the reinforced concrete structures become successfully implemented in housing and community construction in Bulgaria?
First three-four decades of the 20th century
What does the service life of structures refer to?
The load or deformation level at which irreversible failures of the bearing structure may occur
Which country enforced the mass usage of prefabricated steel reinforced concrete constructions in the Eastern block after World War II?
Russia
What is the main focus of the expanded framework mentioned in the text?
Design fields
What is the theoretical time period known as for the life expectancy of structures?
Service life of structures
What is the primary requirement enforced by modern new functions for the structures, as mentioned in the text?
Knowledge of different technological methods of reconstruction
What does planned obsolescence refer to according to the text?
Economic reality and part of an expanded framework
What is the main focus of the literature cited in relation to short-lived structuring?
Experimental recommendations
What are some requirements for the construction engineers, based on the text?
Knowledge of different technological methods and understanding load-bearing capacity
Learn about the useful properties of Portland cement based concrete, such as ease of formability, rigidity on setting and curing, and resistance to compressive forces. Understand its weaknesses in resistance to tensile forces, flexural tension, and shear.
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