When a handful of short fibers are sprinkled into concrete, many people’s first reaction is whether it will make the concrete stronger like steel bars.
This understanding is somewhat similar, but not accurate.
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How to prevent pile breakage when pouring concrete underwater
1) During the process of pouring concrete, due to the detachment of the conduit, mud enters the conduit, causing the mud in the hole to suddenly and rapidly drop.
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【 Paper Recommendation 】 | Preparation and mechanical properties of low-carbon all coral seawater concrete based on coral micro powder
Against the backdrop of the strategy of building a maritime power and the “dual carbon” goal, the construction of islands and reefs in the South China Sea is facing challenges from the scarcity of ordinary sand and freshwater resources.
Although all coral seawater concrete (CASC) can be locally sourced, the large amount of cement used leads to high carbon emissions.
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Frequent occurrence of concrete construction problems in summer, efficient and worry free handling in this way
(1) Strictly control the pouring temperature of concrete, and the maximum pouring temperature of concrete should comply with the design specifications.
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Daily science popularization: What happens to concrete curing and cement? No one can answer it
The newly poured concrete may appear to be already formed on the surface, but stepping on it may quickly leave no deep marks.
Many people may think that it just goes from wet to dry, like mud drying hard.
Repeatedly sprinkling water, covering with damp cloth, and laying thin film on the construction site also appears to be preventing surface cracking.
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Causes of concrete surface scaling and peeling, and prevention and repair plans?
Gas accumulation in concrete, premature fading, lack of protection before setting, improper curing, etc.
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Understand Ultra High Performance Concrete (UHPC)
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The optimal time and control points for cutting joints in concrete pavement.
Why do concrete pavements need to be cut? When concrete solidifies, it will continue to shrink and generate stress.
Without actively reserving cutting joints to guide release, the road surface will randomly crack irregularly.
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The new national standard will be implemented in August, and the concrete admixture industry will face a “safety test”
The Safety Technical Specification for Concrete Admixtures (GB 46039-2025) will be officially implemented.
This is the first time that the country has issued special mandatory safety technical specifications for the field of additives – not recommended standards, but a bottom line that must be implemented.
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Concrete underwater 3D printing: hybrid design driving force mapping for enhanced performance
The gas permeability is measured using argon gas in rigid triaxial cells suitable for core diameters of 110 millimeters (L) and 65 millimeters (T).
Side sealing to enhance one-dimensional flow; The surface is overlaid and compressed onto the O-ring.
The test is conducted at 20 ° C.
The circuit is composed of a known upstream control volume as shown in Figure 3.
According to the permeability range of the sample, the volume can be selected from four types.
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