Construction Precast Development
Precast News From China
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Roller compacted concrete (RCC) adopts thin-layer continuous pouring and vibration compaction, which has the advantages of fast construction speed and low cost.
Mastering the mix design, compaction process, and quality inspection is the key to projects such as concrete face rockfill dams.
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The construction process of concrete pouring includes preparation before pouring, material placement in the warehouse, leveling and vibration, and curing.
Mastering the key points of each link is the key to ensuring the quality of concrete.
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Concrete mixing and transportation are the bridge connecting production and pouring.
Master the allowable deviation of ingredient weighing, feeding method, transportation equipment and scheme selection to ensure the quality of concrete.
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Common quality problems in concrete engineering include surface damage, cracks, structural leakage, and structural instability.
Mastering the corresponding reinforcement methods is an important aspect of engineering maintenance and risk mitigation reinforcement.
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Core features of commercial concrete enterprises: centralized industrial production at designated locations, on-demand production based on orders, no inventory backlog of finished products, integrated production and distribution, single raw materials (cement/sand/fly ash/additives), tanker transportation and distribution, general taxpayers can choose simple tax calculation of 3%, and production and sales data are highly matched with energy consumption.
Different from pure manufacturing and pure construction industries, commercial mixed use enterprises belong to a composite format of building materials production+transportation and distribution, with no product backlog, no finished product inventory, and strong correlation between output and electricity consumption/raw material consumption.
They are a key industry monitored by tax big data.
This article systematically reviews the entire process of business, internal control, financial accounting, project customer accounting, tax and fee system, voucher attachments, and financial and tax risk avoidance plans for commercial mixing enterprises, adapting to various financial and tax service scenarios for commercial mixing plants.
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Cement: Expired (more than 3 months) or clumped cement cannot be used.
When purchasing cement, one should request a cement certificate from the seller.
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This tax reform is not simply a 10% increase in costs.
General taxable items may actually experience a decrease in tax burden due to an increase in input deductions, while simple taxable items are the true cost pressure zone.
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Recently, “Six Networks” has become a high-frequency buzzword in the economic field that continues to gain popularity.
At the beginning of the 15th Five Year Plan period, the Politburo meeting of the Communist Party of China Central Committee clearly proposed to strengthen the planning and construction of water networks, new power grids, computing power grids, new generation communication networks, urban underground pipelines, logistics networks, and promote the commencement of major engineering projects with mature conditions.
This adjustment marks the comprehensive opening of a new round of systematic and networked new infrastructure in China.
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TBM excavation is a commonly used construction technique for water conservancy tunnels.
The excavation and lining processes are closely connected, and the working space is limited.
The efficiency, quality, and safety control requirements for synchronous lining construction are extremely high.
Synchronous lining can achieve parallel operation of tunnel excavation and concrete lining, effectively compressing the total construction period and improving construction continuity.
This article combines engineering practice to summarize the construction process, process points, quality control, and on-site management experience of synchronous lining concrete in TBM sections.
It also outlines the construction difficulties and countermeasures, which can provide reference and guidance for similar TBM synchronous lining projects in water conservancy tunnels.
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Among concrete admixtures, water reducing agents are an important type.
Water reducing agents have been widely used in concrete preparation, and the dosage has always been a difficult point in the use of water reducing agents.
This article combines the factors that affect the performance of water reducers and the mechanism of action of water reducers to study the determination method of the optimal dosage of concrete water reducers, in order to achieve the maximum performance of water reducers.
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