Many people believe that stone powder in sand is harmful to concrete, so they try their best to remove it.
Little do they know, a moderate amount of stone powder can also have a positive effect.
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Month: September 2025
Why does concrete produce color difference? Its causes and corresponding treatment methods
The concrete industry has undergone decades of development, and the mix design and production process have become relatively mature.
However, the current quality control of concrete still faces core difficulties – the quality of raw materials is uneven and fluctuates frequently.
If the mix ratio is not adjusted in a timely and accurate manner, it is easy to cause various quality problems.
For example, concrete mixtures are often blocked due to poor aggregate wrapping, segregation, bleeding, or excessive loss of slump over time; Fluctuations in raw materials may also result in substandard strength or large strength dispersion of concrete test blocks, leading to substandard engineering quality.
With the increasing efforts in environmental control, unstable raw material quality has become a norm in the industry.
Therefore, understanding the current status of raw materials, adapting production processes to fluctuations in raw materials, and improving concrete quality are of great practical significance.
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Application of Sodium Gluconate in Concrete
Sodium gluconate is mainly used as an efficient retarder in concrete, which can delay the setting time of concrete, improve workability, and have a small impact on strength development.
It is one of the commonly used chemical additives in concrete engineering.
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C30 concrete cost revealed: material cost as low as 260 yuan per cubic meter? Construction must see!
Do you often have headaches about calculating the cost of concrete on construction sites? Especially for the most commonly used C30 concrete, how is the material cost calculated? Today, I will use the most straightforward way to thoroughly dismantle the material cost of ordinary C30 concrete, allowing you to go from “fuzzy estimation” to “precise control”! This article will show you step-by-step calculations, combined with real data and practical skills, to help you save money and worry.
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The technical leader gave 100% positive feedback on the construction plan for large volume concrete (template)
This series is based on a super large super high-rise and complex project, and has selected 28 high-quality construction plans for the project to share with everyone.
All the plans are illustrated with detailed and exciting content.
We hope everyone likes them.
This article is the third one.
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Nanotechnology reshapes concrete admixtures, ushering in a silent revolution in the construction industry
In the laboratory of Sichuan Provincial Highway Planning, Survey and Design Institute, researchers have successfully combined graphene oxide with nano chitosan to develop a rebound reducing sprayed concrete admixture suitable for high and low temperatures.
This material can form a barrier layer at the interface of concrete, reducing the internal porosity of concrete by 15-20%, effectively preventing the invasion of harmful substances such as moisture and chloride ions.
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Can concrete engineering still be done like this? Smooth as a mirror, it’s so beautiful!
At the construction site of the Yangtze River Diversion Project, a stunning achievement has been born! The concrete pouring of the main structure of the drainage channel for the civil construction and metal structure mechanical and electrical installation of the first bid of the Yangtze River Diversion Project has been successfully completed.
Its surface is bright and visible, like a huge “mirror”!.
The Chinese concrete industry is facing a majority of bankruptcies
In the first half of 2025, the concrete industry in Zhejiang Province has delivered a mixed answer under the dual pressure of policy dividends and market winter.
Despite steady progress in the province’s economy, with a year-on-year increase of 5.
8% in regional gross domestic product and a total output value of over 553 billion yuan in the construction industry, the concrete industry is deeply mired in a quagmire of low operating rates, frequent price wars, and a wave of corporate bankruptcies.
According to industry statistics, the number of concrete enterprises in the province decreased by 11.
16% in the first half of the year compared to the same period last year.
Among them, 72 enterprises were forced to withdraw from the market due to business difficulties, and the industry reshuffle accelerated.
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Engineering Structures: Design, Manufacturing, and Performance of Prestressed Reinforced 3D Printed Concrete Composite Floors
With the development of intelligent construction technology, 3D concrete printing (3DCP) has gradually moved from landscape art to structural engineering due to its advantages of automation, template free, and flexible forming.
The common forms of 3D printing structures currently include reinforced masonry structures, permanent formwork structures, and prestressed concrete segmental assembly structures.
However, traditional permanent formwork structures have a large self weight, while prestressed assembly structures suffer from insufficient bearing capacity.
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Concrete segregation first aid method – can be done in just 2 minutes!
Concrete segregation not only affects construction, but also affects the uniformity of concrete.
If segregation occurs during the use of a concrete mixer, it can become very troublesome.
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