Chapter 10
Elasticity, Creep, and Shrinkage in Concrete
混凝土中的弹性
When a concrete specimen is subjected to moderate or high magnitude uniaxial compressive or tensile stresses, the resulting strain varies ...
混凝土的动态弹性模量
Stress analysis in concrete structures prone to dynamic and impact loading employs the dynamic modulus, which is greater than the static modulus of ...
混凝土中的蠕变
When a loaded concrete member is subjected to constant stress that is sustained over time, the strain in the member increases, resulting in its ...
影响蠕变的因素
In concrete mixes, the hardened cement paste primarily contributes to creep, while the aggregates in the mix restrain creep.
Aggregates with a high ...
蠕变的效果
Reinforced concrete beams subjected to creep undergo increased deflection. This may result in further bending of the beam, widening existing cracks, and ...
混凝土中的收缩
The loss of water or chemical reactions reduces the concrete's volume, a process known as shrinkage.
Practically, shrinkage in concrete is ...
干燥收缩
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 ...
碳化收缩
In the presence of moisture, atmospheric carbon dioxide entering the concrete surface transforms into carbonic acid, which chemically reacts with the ...
混凝土中非结构性裂缝的类型
After placing concrete, water may rise to the top of the mix, settling the aggregates.
If reinforcements within the concrete obstruct this natural ...
大体积混凝土浇筑
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 ...
炎热天气混凝土浇筑
In dry and hot conditions, placing fresh concrete at high temperatures accelerates the setting and leads to rapid evaporation of water from the concrete, ...
寒冷天气混凝土浇筑
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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