conpd0523

As the core part of civil air defense engineering, the construction quality of concrete structures is highly concerned.

The concrete structure of civil air defense engineering has the characteristics of high protection level, large structural size, and dense reinforcement, which puts forward higher requirements for concrete materials, mix design, construction technology, and other aspects.

This poses a severe challenge to the quality control of concrete structure construction.

Strengthening the quality control of concrete structure construction in civil air defense engineering is an important guarantee for ensuring the quality, safety, and functional performance of civil air defense engineering.

Elephant Foot Ferrule

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Concrete, as an indispensable material in modern architecture, its strength is one of the key indicators for measuring building quality.

Ensuring accurate testing of concrete strength is of great significance for ensuring the safety, stability, and durability of engineering structures.

Spherical Head Anchor

As a convenient and efficient concrete strength testing technology, the accuracy of the rebound method’s testing results directly affects the evaluation and acceptance of engineering quality.

Therefore, the importance of in-depth analysis of the accuracy of rebound method in detecting concrete strength not only helps to improve the reliability of detection technology, but also provides strong guarantees for quality control of construction projects.

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During the production process, it is inevitable that there may be over mixing of additives due to issues with the weighing system.

The so-called weighing system problem may be due to the fact that the feeding butterfly valve of the additive is not closed before weighing, resulting in the additive directly leaking into the mixer; It may also be due to leakage from butterfly valves or additive scales; It may also be due to significant errors during weighing.

Edge Lift Anchor

Due to the severe segregation of concrete caused by excessive addition of high-efficiency water reducing agents, it is easy to detect during on-site inspection, and therefore will not be discussed here.

Efficient retarders, due to their minimal water reducing effect, are difficult to detect in actual production as excessive mixing does not cause significant concrete collapse and severe segregation.

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A certain project is located in the severe cold zone of northwest China.

Due to the special nature of the project, tight schedule, and heavy workload, it needs to be constructed all year round, and a large amount of concrete pouring operations need to be carried out normally in winter.

Currently, research on concrete construction in cold regions both domestically and internationally is mostly focused on raw materials, mix proportions, and insulation, temperature measurement, and curing, with relatively little research on other aspects of the entire construction process.

However, this project has strict requirements for the performance of concrete, and the raw materials and mix proportions cannot be changed arbitrarily.

It also needs to have frost resistance and durability.

Conventional winter construction measures are difficult to meet the needs, so special research is needed.

Swift Lift Clutches

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① The raw material testing is qualified, and the machinery and equipment meet the construction requirements.

Precast Round Ferrule

② Clean the sprayed surface and set control concrete thickness standards every 2 meters.

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As temperatures continue to drop, many areas in northern China have entered the winter construction phase.

For construction projects, winter concrete construction is an unavoidable challenge.

Halfen Channel

Low temperature environment not only directly affects the setting and hardening of concrete, but also may lead to a decrease in its strength, durability, and even serious quality accidents.

Therefore, as the “guardian angel” of engineering quality, supervisors must firmly grasp the key points of winter construction control to prevent problems before they occur.

This article will systematically sort out the core of supervision and control for concrete winter construction, helping you ensure a smooth winter for your project.

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Large volume concrete, due to its large cross-sectional size and concentrated release of hydration heat, is prone to cracking caused by temperature stress, directly affecting structural strength and durability.

Halfen Channel

Based on the “Construction Standard for Large Volume Concrete” (GB 50496) and practical engineering experience, the core requirements for material selection, mix design, construction technology, and maintenance control are now improved as follows to ensure construction quality.

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During the concrete construction of water conservancy projects, quality problems such as honeycombing, cracks, unevenness, local detachment, and exposed reinforcement often occur on the surface of the concrete, posing a huge threat and hidden danger to the overall quality and safety of the project.

Rebar Wheel Spacers

And the existence of these problems is often due to the influence of various uncertain factors in the actual production and construction application process.

By effectively applying concrete testing technology, the problems and defects can be discovered in the first time, which is beneficial for relevant personnel to discover and take effective measures to prevent and solve them in a timely manner.

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The internal exchange journal materials on local engineering cost, judicial appraisal, engineering law, and engineering audit in Yunnan Province are mainly written by technical personnel with many years of frontline work experience.

They are all summaries of practical work experience, and most of the attached cases are actual engineering cases that have occurred locally, which have good reference value.

Please contact me if you need to subscribe or participate.

Magnetic Thread Disc

We warmly welcome you.

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Beijing Fengzhu Engineering Technology Research Institute Co.

, Ltd.

(hereinafter referred to as “Fengzhu Research Institute”) was established in 2017 and is a technology enterprise specializing in research and practice of civil engineering and earthquake prevention and disaster reduction technology.

Precast Lifting Clutch

The core team of Fengzhu Research Institute is led by Comrade Yao Panfeng, with members possessing rich engineering practice experience and research foundation.

They have participated in the construction of major projects such as Tianjin 117 Building and China Zun (Director of Structural Design), creating comprehensive benefits of over 800 million yuan and leading the world in some fields, with 6 world or domestic records.

As of 2025, the company (including Comrade Yao Panfeng’s patent) has obtained over a hundred patent authorizations, including more than 40 invention patents.

Fengzhu Research Institute has established cooperative relationships with several top domestic research, design, and construction units, and has strong influence in this field (see Introduction of Beijing Fengzhu Engineering Technology Research Institute Co.

, Ltd.

).

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