Climate conditions (such as freeze-thaw cycles) may cause freeze-thaw damage, which needs to be prevented by optimizing mix proportions (such as adjusting aggregate gradation) or adding antifreeze agents.
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precast-tech
precast-tech
Why does concrete need maintenance? Summary of 15 years of concrete industry experience!
When pouring concrete, the skilled workers followed the specifications for operation, and the vibration was done very solidly, and the surface was also applied very neatly.
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The Effect of Granite Waste Content on the Performance of Concrete with Different Strength Grades
According to the report of the World Business Council for Sustainable Development (WBCSD), the world’s annual concrete production exceeds 25 billion tons, with a huge demand.
Fine aggregates can reduce cement content by 10% to 15% through gradation optimization, while ensuring the dimensional stability of concrete.
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Precautions for Construction of Commercial Concrete
Thank you very much for using our company’s commercial concrete for your project.
Our company attaches great importance to your project, strictly organizing production in accordance with relevant regulations and requirements, from the design and control of raw materials entering the factory, mix proportions, to the control of concrete leaving the factory.
However, concrete is often affected by various factors during delivery and use.
If effective measures are not taken during construction and maintenance, it may cause quality problems.
Therefore, our company proposes the following suggestions for concrete construction:.
Research on Quality Control Points of Mechanized Sand Concrete
Tang Kaijing and others studied basalt mechanism sand, river sand, and quartz mechanism sand, and found that different rock types of mechanism sand have a significant impact on the workability of C50 concrete.
Differences in morphology and gradation are the reasons for the decrease in workability.
Donza et al.
conducted a comparative study on the workability of limestone, granite, dolomite mechanism sand, and natural sand concrete, and found that the chemical mineral composition, rock type, bulk density, and internal structure of the mechanism sand parent rock are the main factors affecting the performance of mechanism sand.
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Common problems and prevention measures for autumn construction of concrete
The climate characteristics of autumn show significant changes in temperature, humidity, and wind speed (daily average temperature of 5-20 ℃, temperature difference between day and night of 8-15 ℃, relative humidity of 40% -80%), which directly affects the concrete from mixing, pouring, curing to hardening and forming.
According to the “Winter Construction Regulations for Building Engineering” (JGJ/T104-2011), concrete quality problems caused by climate factors in autumn account for more than 35% of the total annual amount, with particularly prominent issues such as cracks, insufficient strength, and surface defects.
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Types and characteristics of concrete cracks in bridge engineering
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Phenomenon: Cracks that settle due to bleeding or shrinkage of concrete within 1-3 hours after pouring.
The settlement crack cracks along the direction of the main reinforcement on the surface of the beam and slab, and the crack extends as deep as the surface of the reinforcement.
Plastic shrinkage cracks produce irregular diagonal cracks above the steel bars.
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Engineering construction | Rights protection methods for verifying concrete strength when cracks, component deformations, and other issues
In the field of engineering construction, concrete is the main load-bearing material, and its strength grade is directly related to structural safety and service life.
According to the “Code for Design of Concrete Structures” (GB/T50010-2010), different engineering parts have strict requirements for concrete strength.
For ordinary homebuyers, when they discover quality problems such as cracks and component deformation in their houses, they can learn about the strength of the concrete through the following methods.
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How to do well in autumn concrete construction in 2025? The complete guide is here!
The climate characteristics of autumn are distinct, with large temperature differences between day and night, frequent fluctuations in air humidity (some areas are rainy in the early stage and dry in the later stage), and gradually decreasing temperatures.
These factors will have a significant impact on the mixing, transportation, pouring, and curing of concrete, which can easily cause problems such as cracks, slow strength growth, and decreased structural durability.
Therefore, in autumn concrete construction, it is necessary to focus on the four core points of “temperature control, moisture retention, crack prevention, and strength promotion”, and pay special attention to the following precautions:.
How to pay value-added tax for cement processing concrete business?
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