Chapter 10
Elasticity, Creep, and Shrinkage in Concrete
Elasticidade no Concreto
When a concrete specimen is subjected to moderate or high magnitude uniaxial compressive or tensile stresses, the resulting strain varies ...
Módulo de elasticidade dinâmico do concreto
Stress analysis in concrete structures prone to dynamic and impact loading employs the dynamic modulus, which is greater than the static modulus of ...
Fluência no concreto
When a loaded concrete member is subjected to constant stress that is sustained over time, the strain in the member increases, resulting in its ...
Fatores que afetam a fluência
In concrete mixes, the hardened cement paste primarily contributes to creep, while the aggregates in the mix restrain creep.
Aggregates with a high ...
Efeitos da Fluência
Reinforced concrete beams subjected to creep undergo increased deflection. This may result in further bending of the beam, widening existing cracks, and ...
Encolhimento no concreto
The loss of water or chemical reactions reduces the concrete's volume, a process known as shrinkage.
Practically, shrinkage in concrete is ...
Encolhimento de secagem
When hardened concrete is exposed to unsaturated air, the free water present in its capillaries evaporates out of the pores.
This causes the movement of ...
Encolhimento de carbonatação
In the presence of moisture, atmospheric carbon dioxide entering the concrete surface transforms into carbonic acid, which chemically reacts with the ...
Tipos de fissuras não estruturais no concreto
After placing concrete, water may rise to the top of the mix, settling the aggregates.
If reinforcements within the concrete obstruct this natural ...
Betonagem em massa
When large volumes of concrete are placed, if the temperature of the concrete on the surface and the interior region is different, thermal cracks may ...
Concretagem em clima quente
In dry and hot conditions, placing fresh concrete at high temperatures accelerates the setting and leads to rapid evaporation of water from the concrete, ...
Concretagem em clima frio
During cold weather, when freshly placed concrete starts to freeze before it sets, the water in the concrete converts to ice, resulting in its expansion.
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