How long does concrete last? How long does concrete last?

Generally speaking, the life of concrete is about 10 to 20 years, which can be said to be very long.

The life span of concrete is generally about 100 years, and this life is also very long. And at present, the quality of concrete on the market is getting better and better, and the life will be longer.

It has a long lifespan, and while it is matched with steel bars, the buildings it constructs can reach more than 80 years.

Thanks to the invitation, the life of concrete is mainly determined by the design and the environment in which it is used. The natural decomposition time of concrete is equivalent to weak weathering stone, in the process of use, the pavement concrete is finished in more than ten years, the concrete of housing construction projects has 50 years, 70 years, and the concrete life of our Three Gorges Project should be hundreds of years.

Usually the service life of concrete is 60 years.

Concrete has good durability, and can be stored for a very long time and is very durable under the premise of not having natural or man-made disasters, but in order to keep the concrete in a safe state, it is usually replaced once every 60 years.

As long as the concrete or mortar is in a good environment, that is, there is no corrosion, no freeze-thaw, no high temperature (above 100 °C) and so on the destructive factors of concrete mortar, the strength of concrete mortar will not be reduced, and can be used all the time. This is where concrete mortar is superior to organic and metal materials.

Concrete mortar coagulated by cement is an inorganic mineral material with good stability in itself. However, the concrete reinforced concrete structure of the actual engineering application is in the natural environment, and it will inevitably encounter many damaging factors, such as the bridges and wharves in the north will inevitably be frozen in winter, and the sea-crossing bridges and coastal wharves will inevitably be eroded by seawater (chlorine in seawater can penetrate into the concrete and cause steel rust), and the soil in some areas contains sulfates or acid rain will corrode the concrete, and so on.

In addition, concrete can also undergo internal self-expansion failure, such as alkali-aggregate reactions, delayed aluminite formation, and so on. If no measures are taken to prevent these damaging factors, the shortest life of concrete structures may only be more than ten years, or even a few years. Fortunately, the current concrete technology can effectively improve the resistance of concrete to external factors and prevent internal damage.

The latest standard GB T 50476-2008 "Code for Durability Design of Concrete Structures" is to design the structure and concrete according to the environment and possible damage factors of the concrete structure to ensure the service life of the concrete structure. Depending on the importance of the project, the design service life is not less than 50 years and 100 years.

Reinforced concrete does not have a lifespan of 500 years.

Regarding the life of reinforced concrete, it depends on which position you use it in, if it is like the reinforced concrete structure used in our high-rise buildings and the life is at least 50 years, generally speaking, the life of about 70 years is no problem. If the concrete is constructed on the surface, its life may be relatively short, such as the floor slab at the top of some high-rise buildings, reinforced concrete may be used, and after the wind and sun, its life will be greatly reduced, at best it is 50 years of life.

Reinforced concrete does not have a lifespan of 500 years, and the normal service life of a reinforced concrete house can reach 60 years, with brick-concrete structures.

There are several more years. Of course, because of the different uses, its life span is not absolute, and the specific needs to be determined according to the structure of the house.

Because some houses may be affected by the natural environment.

cracking, accelerated destructive force or erosion, weathering, will also affect the service life. In the later stage, if the method of maintenance and reinforcement can be adopted, some defects can be repaired, and the service life can be improved. However, if hidden dangers are found and not dealt with in time, there will be safety hazards in such a house.

Reinforced concrete structureand the difference between brick-concrete structures

1. Some high-rise buildings choose reinforced concrete, and some choose brick concrete, and the main difference between the two lies in the different load-bearing structures. If the former is chosen, it is built of reinforced concrete, which can meet the requirements of bearing tensile force, and is strong and durable, with good fire performance.

2. If you choose a brick-concrete structure, you can meet the load-bearing requirements by building wall columns. And the brick-concrete structure, a small part will choose reinforced concrete pouring, which should be regarded as a mixed structure. It is load-bearing by brick walls, which is suitable for the depth of the bay.

comparatively smaller house structure, and this structure, later load-bearing walls.

It must not be altered, and it is suitable for multi-storey or low-rise building forms.

3. The two also have different advantages and disadvantages, such as the cost of brick and concrete is smaller, but it cannot build high-rise buildings. Reinforced concrete can build high-rise buildings, but the cost is relatively large.

Judging from the current situation, the main structure is only a few decades old, and other places are discounted. Intuitively, the house will have to be repaired 20 years after it was built.

No, is there so much lifespan? This still depends on the quality, and the most important thing is the quality.

1.60 years for reinforced concrete structures and 50 years for brick-concrete structures.

2.The service life of a dwelling refers to the number of years that a dwelling can maintain normal use under physical wear and tear, and is determined by the structure and quality of the dwelling. The depreciation life of a dwelling refers to the number of years of transfer of the value of the dwelling, which is determined by the socio-economic conditions in the process of use, and is also called the economic lifespan.

The useful life of a dwelling is generally greater than the depreciation life.

The life span of brick-concrete structure is 50 years. The specific explanation is as follows.

1. Brick-concrete structure refers to the wall of the vertical load-bearing structure in the building. Brick-concrete structures are generally used in single-storey or low-rise houses, mainly relying on the mutual friction of bricks and the stiffness resistance of materials, of course, bricks can not be compared with concrete, but as long as appropriate structural measures are taken to resist the smaller ** is not much of a problem.

2. The brick-concrete structure is a kind of mixed structure, which is to use the brick wall to bear the load. The brick-concrete structure has strong chemical stability and atmospheric stability, is not easy to react with other chemicals, has stable durability, and is suitable for use in buildings with high requirements for service life.

3. The brick wall and the inner frame are mixed load-bearing, and the internal beams and columns are used instead of the wall load-bearing. The sound insulation effect of brick-concrete structure is medium, and the sound insulation effect of frame structure depends on the choice of partition material, the sound insulation effect of some advanced partition materials is better than that of brick-concrete structure, and the sound insulation effect of ordinary partition materials, such as cement hollow core slabs and the like, is worse than that of brick-concrete structure.

Hello dear! Generally speaking, the service life is between 30 and 50 years. The floor house is actually a prefabricated slab, which is a form of housing construction that is produced by the manufacturer and then directly transported to the site for construction, which can reduce the difficulty of construction.

But its seismic performance is not particularly good. Of course, this time is not absolute, some may be less than 30 years, mainly because it depends on the materials of construction, including its quality. The seismic performance of prefabricated floor slabs is relatively poor, and you can choose it when building a house in the countryside.

Hello pro-concrete takes about 6-10 hours for initial solidification and 28 days for complete solidification to grind the reeds. During this period, the concrete structure needs to be kept wet to avoid cracks. After initial solidification, the concrete surface can withstand weight, but it cannot be subjected to shock or vibration.

When fully solidified, the concrete will reach its maximum strength and can withstand the greater loads of the traces. Therefore, before the concrete structure is put into use, it needs to be fully cured and inspected to ensure that it is safe and reliable. <>

Commercial housing can not be guaranteed, the Internet often breaks the news that the walls of commercial housing fall off, cracking, and even with your hands can pinch a handful of concrete down, more cruel is that some walls are mixed with straw, linen, plastic nylon, straw mats, in short, in my opinion, the normal is generally in 30-40 years, abnormal years, in recent years, I often see some places bridge collapse, building collapse, highway doll pits, there are many reasons for this phenomenon, or commercial bribery in the middle of the link, kickbacks, These are caused by the developer's cost is too high or the contractor is pinched by the profit is too low or irresponsible some profiteers, the house has a foundation to build its own value is reliable, the quality will not be bad, commercial housing in addition to speculation, ** and high, the quality can not be guaranteed, even if Beijing, Shanghai and Guangzhou?

There should be no possibility of satisfying the theoretical value, because the product cannot meet the standard. But if you use it as waste, you can leave it behind for 10,000 years!