Construction Precast Development
Precast News From China
precast-tech
Recently, as the cutterhead of the No.
625 shield machine of China Railway Equipment slowly broke through the wall, the left line of the section from Jinjilu Station to Jianshe Yilu West Station of Hangzhou Metro Line 15, which was constructed by China Railway First Bureau, was accurately connected, and thus the double track tunnel of this section was successfully connected.
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Due to its low tensile strength, concrete floors can be cracked by the tensile stress generated during thermal expansion and contraction.
And seam cutting is the use of manual intervention to cut horizontal and vertical seams to guide and control the location and direction of concrete cracking.
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In construction engineering, the crack resistance of large volume concrete has always been a pain point in the industry – once cracks appear, they not only affect the aesthetic appearance of the structure, but may also weaken the bearing capacity, reduce durability, and even cause safety hazards.
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13 sets of typical cases of special construction plans for hazardous projects (3D color images), including Bailey beam high formwork, steel structure, large-span high suspended structure formwork platform, aluminum alloy formwork support, cast-in-place box girder, tower crane installation and removal, corridor suspended ceiling curtain wall hoisting, hydraulic climbing formwork, steel mesh frame, bridge jacking, foundation pit support, earthwork excavation, cantilever scaffolding, cable tower and other special constructions.
They play a key role in eliminating major accident hazards in construction and preventing major safety risks in engineering construction, and are provided for learning and reference.
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Concrete used for hydraulic structures such as dams, water gates, pump stations, embankments, bridges, culverts, etc.
is called hydraulic concrete.
The reasonable design of hydraulic concrete and strict control of its construction quality are important guarantees for the engineering quality of hydraulic structures, which are related to the safe operation of the entire hydraulic structure.
Therefore, during the entire process of constructing hydraulic structures, the quality of concrete should be tracked and tested from beginning to end to ensure that the quality of concrete used for hydraulic construction meets design requirements, is stable, and has minimal fluctuations.
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On March 6th, the national cement market experienced a major decline, with prices mainly concentrated in Zhejiang province.
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It is continuously updated every day.
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Those who study engineering, especially civil engineering related majors, as well as those engaged in civil engineering project design, construction, supervision, and budgeting, inevitably have to deal with the word “tong” frequently.
Speaking of the word ‘concrete’, it’s a bit awkward.
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According to the Announcement of the Ministry of Finance and the State Administration of Taxation on the Connection of Value added Tax Preferential Policies after the Implementation of the Value added Tax Law, starting from January 1, 2026, general taxpayers who sell self-produced commodity concrete made of cement as raw material cannot choose to use the simplified tax calculation method for taxation, and can only apply a tax rate of 13%.
The introduction of the new policy has attracted widespread attention in the industry.
The following is a summary of research feedback on some concrete enterprises in Central China.
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The particle size of stones directly affects the strength, workability, and compactness of concrete.
It is not necessarily better to have larger or smaller stones.
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