Construction Precast Development
Precast News From China
The performance of concrete is closely related to environmental temperature, and sudden cooling, as a typical extreme temperature change condition, can have a negative impact on the workability, strength, and durability of concrete by changing the hydration of cement and causing volumetric stress imbalance.
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With the continuous development of materials science, the application field of concrete is becoming more and more extensive.
Regardless of which field of concrete it is used in, the key to its mix design is to target the workability, mechanical properties, and durability of concrete, select suitable raw materials, optimize mix parameters, and achieve the design requirements.
Starting from the inherent requirements of mix proportion design, this article explores the direction of mix proportion adjustment under the influence of different factors, which has practical guiding significance for the design and production of concrete.
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In the evolution of the construction industry, precast concrete components, as a revolutionary building technology, are gradually changing traditional building models.
It not only improves building quality and construction efficiency, but also provides strong support for achieving building industrialization and sustainable development.
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[Introduction] Two different density grades of aggregates are used to prepare concrete with a density grade of 4300kg/m3.
It is advisable to use a volumetric sand ratio and design the mix proportion according to the volumetric method.
The calculated mix proportion has a good correlation with the actual mix proportion.
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High performance concrete is a type of concrete that significantly improves various performance indicators on the basis of ordinary concrete.
It is made using modern concrete technology such as low water cement ratio, high water reducing polycarboxylate superplasticizer, and large amount of ultra-fine mineral admixture.
Its main technical indicators are excellent durability, high compressive strength, good impermeability, corrosion resistance, frost resistance, and inhibition of concrete alkali aggregate reaction.
Its concrete mixture has excellent workability (and ease of use), strong applicability, and is also an economical and environmentally friendly concrete.
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The daily work of concrete technicians cannot be separated from communication, just like communication between departments, reporting work to leaders, conducting technical briefings with the construction site, and negotiating control of the construction process.
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These tasks require laboratory technicians to have good communication and expression skills.
Good communication skills can sometimes achieve twice the result with half the effort, but improper communication can also be detrimental to work and even affect collaboration between departments and external parties.
Improving communication and coordination skills should be a part of the abilities that concrete technicians need to enhance.
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In renovation and reinforcement projects, it is common to encounter the situation of adding new floor slabs.
Below are the detailed drawings of the connection between the newly added floor slabs and the newly added cantilever slabs in concrete structures.
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All resources provided by the regulatory think tank are collected online or for non-commercial exchange and learning purposes!.
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Construction personnel must undergo safety education upon entering the site, and can only enter the construction site after passing the assessment;.