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5 A certain highway railway overpass (20 meter reinforced concrete T-beam, 35 meter prestressed concrete T-beam).
Month: October 2025
Handling of issues such as honeycomb, rough surface, exposed reinforcement, cracks, and missing corners
During the structural construction process, the project department often discovers varying degrees of quality problems on the construction site, including slag inclusion in construction joints (floor slabs), exposed steel bars, concrete honeycombs, rough surfaces, missing edges and corners, floor cracks, and uneven door and window openings.
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Winter low temperature, key points for hydraulic concrete construction
Due to time constraints, many projects need to be constructed in winter, and the construction technology of winter hydraulic concrete is very important.
Winter construction should pay attention to issues such as pouring, transportation, and curing of concrete.
This article proposes preventive measures for common quality problems in concrete construction during winter.
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The common quality problem of “salt precipitation” in concrete engineering
The phenomenon of “salt precipitation” refers to the migration of soluble salts and alkali substances from the interior of concrete to the surface with water after hardening.
After the water evaporates, white flocculent or powdery residues are left on the surface.
These residues are mainly calcium carbonate (CaCO3), and may also be sodium sulfate, potassium salt, etc.
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Pre mixed concrete green building material certification: 2025 enterprise application practical guide (from policy to testing
In the current era where the “dual carbon” goal is driving the deep transformation of the construction industry, ready mixed concrete, as the “cornerstone material” of engineering construction (accounting for more than 60% of building consumables), has long bid farewell to the era of “only focusing on strength, without considering environmental protection”.
This article compares the latest policy requirements and breaks down the key points of the entire process of green certification for ready mixed concrete, helping enterprises avoid application errors and obtain certificates efficiently.
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How to design the concrete mix proportion for highway bridges and culverts
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The concrete mix proportion should be determined based on the design reference period and environmental conditions of the structure, according to the requirements of raw material quality, design strength grade, durability, construction technology, etc.
, referring to the “Code for Design of Ordinary Concrete Mix Proportion” (JGJ 55-2011) and the “Technical Specification for Construction of Highway Bridges and Culverts” (JTG/T 3650-2020), through calculation, trial mixing, adjustment and other steps.
The crack resistance performance of key component concrete mix proportions should be optimized and verified by trial pouring.
When the design has higher requirements for the durability index of concrete, its mix proportion should be determined separately through research.
When using statistical data of the same type of concrete to calculate and determine the standard deviation of concrete, for concrete of C30 and below, if the calculated strength standard deviation is less than 3.
0 MPa, the standard deviation used for calculating the formulated strength should be taken as 3.
0 MPa.
When there is no statistical data to calculate the standard deviation of concrete strength, the following table can be used for selection.
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Policy Interpretation | Understanding the “Management Measures for Pre mixed Concrete Production Enterprises in Hohhot City (Trial)” with
The drafting of the “Measures” is mainly based on the “Construction Law of the People’s Republic of China”, “Regulations on Qualification Management of Construction Enterprises” (Order No.
22 of the Ministry of Construction), “Regulations on Energy Conservation and Green Building Development of Civil Buildings in Inner Mongolia Autonomous Region”, “Regulations on Quality Management of Construction Projects in Hohhot City”, “Measures for Promoting the Development of New Wall Materials in Inner Mongolia Autonomous Region” and “Qualification Standards for Construction Enterprises”.
Combined with the actual situation of our city, targeted improvements and enhancements are made to the management of ready mixed concrete production enterprises.
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Report Preview | Cui Yuansheng – Future Cement and Concrete – Annual Technological Progress and Prospects
On July 30, 2025, the General Office of the State Council issued the “Work Plan for Accelerating the Construction of a Dual Control System for Carbon Emissions”.
Implement a dual control system for carbon emissions, including intensity control and total quantity control.
The cement industry has achieved a peak in total carbon emissions, but meeting carbon neutrality requirements for carbon intensity is still a long way to go.
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Losing nearly 50 million! Another listed concrete company’s performance release
On the evening of October 28th, Sifang New Materials released its third quarter report for 2025.
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