The temperature control measure and the corresponding norm have been applied in the actual construction. In the construction of past 2 years, nearly no crack appeared in the fast pouring concrete dam.Qiang SLiu M. Z.Zhu Z. Y.Fan J. M....
Freshly placed concrete exerts pressure on formwork during the placing operation. It is influenced by the rate of placing and the air temperature. For instance, if the concrete pouring rate is too slow, setting of concrete starts to take place. As a result, the concrete at the...
for the initial temperature at the interface between old and newly poured concrete.A quantitative relationship between the main parameters,such as density,specific heat capacity,element size and temperature,was obtained.This provides a theoretical basis to explain the empirical values and allows accurate...
1.3.1 The Variation of Temperature of Mass Concrete with Time Because of the large size, the variation of temperature in a mass concrete structure is shown in Figure 1.3; the placing temperature Tp is the concrete temperature just after pouring. If the concrete cannot be completely cooled, it...
(B) to reduce the temperature of the folded section of the concrete tensile stress, concrete pouring time to choose a day when the minimum temperature of pouring, the concrete strength to meet the design requirements of strength, according to the order of symmetry of tension, grouting. After ...
pipes are pre-installed into the pouring area and allow for complete control over the concrete elements’ temperature. Keeping the temperature gradient minimal in a mass element is key to achieving a durable concrete structure. How to Develop a Thermal Plan for your Project ...
In order to reduce the surface temperature of the concrete cracks, concrete slab foundation and expand the use of continuous casting method of slope-style thin pouring over each layer thickness control in less than 40cm in order to take full advantage of cooling the concrete level. 翻译结果2复...
Lastly, all the concrete mixture ingredients were mixed for five minutes before pouring into wooden molds with inner dimensions of (150 × 200 × 1100 mm) and compacted with an electrical vibrator. After twenty-four hours from the beams casting, all beams were de-molded and then cured in a...
When the temperature is within 200°C, the moisture in the concrete begins to evaporate gradually, but the steel fibre plays a bridging role in the interior of the concrete and prevents the development of cracks, so the temperature has little effect on the strength of the specimen. For the ...
• Concrete Pouring • Metal Processing • Food • Drug • Household, Industrial, Aerospace • Cold Chain Transportation • Car Market • Animal Husbandry • Supermarket SPECIFICATIONS K Type T Type J Type Temperature Unit...