precast-tech

On the one hand, the main purpose of watering and curing concrete is to maintain sufficient moisture on the surface of the concrete structure within the specified time, which is the basis of cement hydration reaction.

On the other hand, only by controlling the external conditions of watering and curing concrete can it be conducive to temperature control and avoid the occurrence of cracks.

In the specific process of concrete watering and curing, operators often have a misunderstanding of the purpose of concrete watering and curing, and only understand it as a prescribed operation, without much value to the concrete structure itself.

Before watering and curing concrete, construction personnel should be organized together to learn the process and principles of concrete watering and curing, clarify the purpose of concrete watering and curing, increase the attention of construction personnel to concrete watering and curing, and guide specific behaviors in concrete watering and curing work, thus achieving the improvement of the quality of concrete watering and curing work.

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*Disclaimer: The content contained in this official account is for reference only.

Readers should not simply accept the information of official account instead of their own independent judgment, but should make decisions and bear risks independently.

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This official account will not bear any responsibility for any loss caused by the use of the content contained in this account.

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The concrete pavement of the airport is directly related to the safety of aircraft takeoff and landing and the safety of vehicle passage within the airport area, and has extremely high requirements for structural strength, durability, and construction quality.

During the construction and long-term operation process, various types of cracks and diseases are easily generated on the pavement due to the influence of loads, temperature changes, foundation conditions, construction processes, and environmental factors.

If not treated in a timely manner, they will continue to expand and deteriorate, causing secondary problems such as water seepage and erosion, base detachment, and panel fragmentation, laying hidden safety hazards for operation.

The main causes of pavement cracks are internal structural factors and external environmental load factors.

Large area concrete hydration temperature difference and shrinkage deformation can also induce early cracking.

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This article combines the actual operation and maintenance of airport runway, sorts out the formation mechanism of various typical cracks, proposes targeted technical solutions for source prevention and disease repair, and introduces the application advantages of special grouting materials in combination with daily maintenance conditions, providing practical reference for the maintenance and treatment of airport concrete pavement.

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Pre mixed concrete, as an indispensable material in modern construction, has the advantages of high production efficiency, stable quality, and convenient construction.

It is concrete that is pre mixed in a mixing plant with cement, sand and gravel, water, additives, and admixtures according to a certain mix ratio, and then transported to the construction site for direct use.

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However, due to the complexity of raw material quality, mix design, production process, transportation, and construction, the quality of ready mixed concrete is prone to fluctuations, such as unstable slump, large strength dispersion, and the occurrence of segregation and bleeding.

These problems not only affect the construction performance of concrete, but also reduce the quality and durability of concrete structures.

Therefore, it is of great practical significance to study the causes of quality fluctuations in ready mixed concrete and take effective and precise control measures.

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In the construction of concrete structures, common tests include strength under 28 standard curing conditions, critical strength during winter construction, strength of test blocks under the same conditions, demoulding strength test blocks, and even 7-day strength test blocks.

Precast Lifting Clutch

What is the significance and purpose of these tests?.

The main reinforcement, negative reinforcement, or hoop reinforcement in reinforced concrete structures are exposed on the surface of the concrete.

Precast Round Ferrule

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The concrete mix ratio is the core of concrete production and control, and many technical personnel have invested a lot of effort in research.

Many people have also summarized unique design methods based on their own experience.

However, there are also people who only know the table and mistakenly believe that the mix ratio is just a few simple combinations of numbers, trying to use a set of mix ratios to deal with all situations, only making slight adjustments during production, resulting in frequent problems.

In production, people often inquire about specific values such as cement dosage, mix ratio, sand ratio, etc.

for C30 concrete.

However, these questions are difficult to answer accurately when there is a lack of information on raw material details, construction sites, pouring methods, engineering characteristics, and environmental factors.

Randomly determining the mix ratio is no different from guessing blindly or based on experience.

Steel Chamfer

I believe that concrete mix proportions are not simply numerical stacking, but rather the process of various raw materials working together and complementing each other’s advantages to achieve the expected design goals.

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On April 28th, the Ministry of Industry and Information Technology issued Announcement No.

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9 of 2026.

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Therefore, this article selects C30 and C50 strength grades of concrete widely used in engineering, and studies the influence of mud content (0%~7%) of machine-made sand on their properties through experiments, in order to provide reference for the practical application of machine-made sand.

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With the development of modern building structures towards high-rise and large-span directions, C80 and above high-grade concrete has gradually become the core material for super high-rise buildings, large-span bridges, and marine engineering due to its excellent mechanical properties and durability.

However, the characteristics of high dosage of cementitious materials and low water cement ratio (usually ≤ 0.

30) lead to a significant increase in the viscosity of concrete, causing construction problems such as high pumping resistance, difficulty in compacting, and susceptibility to honeycomb and rough surfaces, which seriously restrict its engineering application effect.

Especially in complex structural construction, high viscosity concrete is prone to pipe blockage, delamination, and even affects structural homogeneity and long-term durability, becoming a bottleneck restricting the development of high-strength concrete technology.

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