SR-3 pre mixed concrete segregation regulator is an upgraded product of pre mixed concrete segregation regulator and concrete anti segregation agent.
Compared with the previous generation product, it has the following characteristics:.
precast-tech
precast technology developments
Typical case of innovation during the 14th Five Year Plan period: digital concrete design methods and applications
This case focuses on concrete design and performance control scenarios for infrastructure projects such as bridge engineering and road engineering.
Aiming at the pain points of relying on experience, low efficiency, and insufficient performance prediction in traditional concrete mix design, an integrated technical path covering multi performance prediction models, digital mix reverse design, and engineering adaptability verification has been constructed with “data-driven+digital modeling+engineering verification” as the core, realizing the transformation of concrete design from “experience trial mixing” to “digital calculation design”, and achieving the technical goals of predictable performance, optimized mix ratio, and verifiable results.
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New technology for construction sites in China! Concrete engineering is’ leak proof ‘!
Recently, the on-site observation and training meeting for improving the quality of municipal engineering construction, hosted by the China Construction Enterprise Management Association, was successfully held at the Wuhan Binjiang Core Area Underground Space Ring Road (Phase II) project undertaken by China Construction Third Engineering Bureau.
More than 200 industry representatives attended the meeting to observe and learn from multiple new technology applications of the project.
Among them, impermeable concrete innovatively applies structural self waterproofing technology: cement-based permeable crystalline waterproofing agent, which can achieve “watertight” concrete engineering through “self healing” of cracks.
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Let me talk to you about the “industrial MSG” of concrete – concrete admixtures, its magnificent three lives and three generations.
In the sleepless night, looking out at the high-rise building under construction outside the window, I remembered my more than ten years of struggling in the concrete and admixture industry.
From a naive youth who didn’t even know what “water reduction rate” was at first, to an old trick of “prescribing remedies” for construction sites now, I have witnessed too many changes.
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Complete analysis of concrete slump loss: seven major culprits and reduction measures
The matching of cement and pumping agent must be determined through adaptability testing to determine the optimal dosage.
The more air entraining and retarding components there are, the slower the slump “falls out”; Conversely, the faster.
Naphthalene based high-efficiency water reducing agents perform well below+5 ℃, but once heated up, the loss rate immediately doubles.
If the setting agent of hard gypsum or the early strength component C3A in cement exceeds the standard, it will cause the slump to change instantly.
The content of C3A should be locked in the range of 4% to 6%: if it is lower than 4%, it is necessary to reduce air entrainment and slow down condensation; If it exceeds 7%, it must be supplemented, otherwise false coagulation and rapid coagulation may occur at any time.
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Principle and usage method of concrete surface reinforcement agent
In order to save costs, modern concrete is mixed with a large amount of admixtures (fly ash or mineral powder), or there is no fly ash or mineral powder but too much admixture in cement.
After vibration, the surface of the concrete is prone to slurry floating, excessive surface floating slurry, water evaporation leaving holes, and excess water causing local water cement ratio to be too high, resulting in low surface strength of the concrete.
In addition, the surface strength of concrete cannot increase even at low temperatures.
The mixing plant uses C30 concrete, which has a rebound of 3-5 megapascals lower, and even lower.
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Analysis of aggregate gradation, surface condition, and mineral composition for concrete collapse?
Aggregate mud content, mud block content, adsorption water reducing agent, reducing free water content, and rapid slump loss.
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The issuance of special bonds worth 1159.9 billion yuan in the first quarter is expected to drive demand for 70 million cubic meters of
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Q1 special bond issuance of 1159.
9 billion yuan, a year-on-year increase of 20.
8%.
On April 16th, the national cement, sand and gravel, and concrete market trends
On April 16th, the national cement market fluctuated, with Jinan, Zibo, and Binzhou rising by 50 yuan/ton, and Wuhu, Chizhou, and Tongling falling by 30 yuan/ton.
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Flexible concrete puts seismic armor on houses
On April 14th, the reporter visited the Anhui Provincial Key Laboratory of Building Seismic Disaster Reduction and Green Operation and Maintenance, and observed a unique “hardcore” competition on site – the comparative test of high ductility concrete (HDC) reinforced rural house vibration table.
The experimental results showed that in the face of severe shaking from a nine degree earthquake, the unreinforced model collapsed instantly, while the houses reinforced with HDC strips only showed minor cracks, and the main structure remained strong.
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