Does adding water affect the strength of concrete when pouring concrete?

Adding water to the concrete mixture will seriously affect the mechanical properties, long-term properties and durability of concrete, which is extremely harmful to the quality of concrete and must be strictly prohibited.

1. Add water to change the original mix ratio of concrete: the mix ratio of commercial concrete is determined by trial matching, and the influencing factors of the construction site have been considered, and the original mix ratio is changed after adding water on site, resulting in a larger water-cement ratio and a decrease in concrete strength; On the basis of a reasonable water-cement ratio, the strength is reduced by 10MPa for each increase

2. After adding water, the concrete forms a weak point: the commercial concrete is stirred unevenly after adding water on site, resulting in a floating slurry, resulting in the formation of a weak layer of concrete and uneven strength, which ultimately affects the overall strength of the concrete;

3. After adding water, the compactness of the concrete is reduced, resulting in the decrease of the self-waterproof ability of the concrete, especially when the water is added before the initial setting of the concrete after pouring.

It will definitely affect the strength of the concrete.

Target. After adding water, the concrete strength is reduced. An important indicator that determines the strength of concrete is the water-glue ratio of concrete.

After adding water, the water-glue ratio of concrete increases, and the strength of concrete decreases.

Hope mine is helpful to you.

Adding a small amount of water has little effect on the strength of concrete, but adding a large amount of water will seriously change the water-cement ratio of concrete, making the strength plummet. Causing concrete segregation.

Of course, it has affected, first, the water-cement ratio has been changed, so that the concrete deviates from the predetermined design strength; The second is to change the workability of the designed concrete, which is likely to lead to segregation and water leakage.

Summary. The increase of water-cement ratio reduces the strength of concrete, but in the actual project, it is often necessary to add water to it, especially when driving cast-in-place piles, in order to make good blanking, water is generally mixed into it.

In the process of commercial concrete pouring construction, the phenomenon of adding water does often occur, mainly reflected in the pouring process of large-area cast-in-situ slab, which directly affects the concrete water-cement ratio, and even segregation, and also affects the strength growth of concrete, the appearance of common quality problems such as surface irregular cracks. Therefore, it is strictly forbidden to add water in the concrete construction process, and to control the collapse of the concrete, before entering the mold, it is strictly forbidden to add water in the closing process; The construction process can only be broken and reduced, and the side station strength can be strengthened.

What are the dangers of adding too much water to concrete.

Wait a minute, dear.

Hello, the harm of adding too much water to concrete is as follows: adding water not only resists or increases the water drainage channel in the process of hardening the concrete, reduces the strength of the concrete, and more seriously, it will lead to the formation of a weak layer in the concrete of Muhe, which increases the possibility of cracks in the concrete.

The increase of water-cement ratio reduces the strength of concrete, but in the actual project, it is often necessary to add water to it, especially when driving cast-in-place piles, in order to make good blanking, water is generally mixed into it. In the process of commercial concrete pouring construction, the phenomenon of adding water does often occur, mainly bright and tan, which is reflected in the pouring process of large-area cast-in-situ slab, this practice directly affects the concrete water-cement ratio, and even segregation, but also affects the strength growth of concrete, the appearance of surface irregular cracks and other quality common problems. Therefore, it is strictly forbidden to add water in the concrete construction process, and to control the collapse of the concrete, before entering the mold, it is strictly forbidden to add water in the closing process; The construction process can only be broken and reduced, and the side station strength can be strengthened.

Concrete cannot be added with water.

After adding water, the concrete forms a weak point, and the commercial concrete is stirred unevenly after adding water on the spot, resulting in the formation of a weak layer of concrete, and the strength is uneven, which ultimately affects the overall strength of the concrete.

The addition of water will change the original mix ratio of the concrete. The commercial concrete mix ratio is determined by trial matching, and the influencing factors of the construction site have been considered, and the original mix ratio is changed after adding water to the site, resulting in a larger water-cement ratio and a decrease in concrete strength.

In addition, the concrete compactness is reduced after water is added, resulting in the reduction of the self-waterproof ability of the concrete, especially when water is added before the initial setting after the concrete is poured.

When commercial concrete is pumped and poured, workers often add water to the concrete for easy operation. Sometimes the high temperature in summer, or the long waiting time of the tanker, causes the workability of the concrete to be reduced, and workers will also add water to the concrete. These cases of adding water to the concrete without permission are not allowed, which will affect the quality of concrete construction.

Is it OK to add water to concrete? Why does the builder add water?

Is it OK to add water to concrete? Why does the builder add water? Do you mean adding water during the pouring process or after pouring?

It is generally not allowed to add water in the pouring process, because it will reduce the grade of concrete, disturb the concrete mix ratio, water-cement ratio, and reduce the concrete strength. However, in the actual construction, when the concrete collapse is too small (too thick and not easy to pour), the workers are bright wax for the convenience of adding water to facilitate the construction. Be careful to control the amount of water you add, never add a lot of water!

The formal practice is to add a water reducer to the concrete, so that the concrete slump increases to achieve the purpose of easy construction. [Tips: If the supervisor or the owner is demanding, pay attention to avoid when adding water] After pouring, water is generally poured on the surface of the formed concrete.

This is a curing process, and there are the following provisions in the specification: The concrete should be covered and moisturized within 12 hours after the concrete is poured (the concrete can be watered and cured, and the soil curing liquid or cover must be taken within 12 hours in summer) The time of concrete watering and curing: for the concrete mixed with Portland cement, ordinary Portland cement or slag Portland cement, not less than 7 days; For concrete mixed with retarding admixtures or impermeability requirements, not less than 14 days.

The number of watering times should be able to keep the concrete in a moist state; The cured concrete should be covered with plastic sheeting, and all exposed surfaces should be tightly covered, and condensation should be kept in the plastic sheeting.

Concrete cannot be added at will, but some workers may add water to the concrete for convenience when operating. For example, during the construction of high temperature in summer, workers will add water to the concrete, which is more common, so what are the consequences of adding water without permission?

1. What is the impact of adding water to concrete?

1. If you add water to the water concrete without permission, it will destroy the original ratio, because if the concrete has been configured before, the seepage ridge can be used directly. Adding water without permission will destroy the original ratio, resulting in a relatively large ratio of water and lime, so the strength of the concrete will be greatly reduced, which will seriously affect the quality of construction.

2. After adding water, the concrete will form a weak surface, and if the water is added and stirred on site is not uniform, a part of it will form a weak layer, and the strength will be unbalanced, which will affect the overall strength and not meet the requirements.

3. After adding water, the density will be reduced, and its waterproof performance will also be affected. Especially before the concrete has set, the effect of adding water is even more serious.

2. If you want to add water, how should you do it?

1. If you have to add water, you must be able to deal with it according to the requirements of the ratio, and while adding water, you must stir it evenly so that it will not lead to the problem of floating slurry in the concrete.

2. Before adding water, you need to get the consent of the site manager, if it is a concrete tanker, it must be mixed at high speed for a few minutes, so that the internal mixing is even, and then it can be used on site.

3. There are some grades of concrete that can be added with water, such as Dongyu C10 model or C15 model can be added with water, but you should also pay attention to the appropriate amount, otherwise it will affect the strength of the concrete, so do not add excessive water, to be moderate.

4. When adding water, we can also add other admixtures to adjust the viscosity of the concrete, which can ensure that the strength of the concrete reaches a certain standard and does not affect the construction requirements of the site.

Summary: If you add water privately, it will have a great impact on the strength of the concrete, but if you have to add water, then it must also meet the standards, and it is the most fundamental principle not to affect the strength of the concrete.

1. The factors affecting the strength of concrete include water-cement ratio, aggregate, additives, curing temperature and age.

2. The water-cement ratio is the most important factor that determines the strength of concrete. Cement is a cementing component in concrete, and its strength directly affects the strength of concrete. Under the condition of the same mix ratio, the higher the strength of the cement, the higher the strength of the concrete.

When the same cement (same variety and strength) is used, the strength of the concrete is mainly determined by the water-cement ratio; In the case that the concrete can be fully compacted, the larger the water-cement ratio, the more pores in the cement stone, the lower the strength, and the smaller the adhesion with the aggregate, the lower the strength of the concrete. Conversely, the smaller the water-cement ratio, the higher the strength of the concrete. After adding water to concrete, the water-cement ratio increases, and the strength will decrease.

Concrete that is too dry and adding water will affect the strength of the concrete.

The strength of concrete is related to the water-cement ratio, and the water-cement ratio refers to the ratio of the weight of water in the concrete to the weight of cement. If the concrete is too dry, the water-cement ratio is low, and the moisture in the concrete is insufficient, which will lead to a decrease in the strength of the concrete. At this time, if too much water is added, it will lead to a high water-cement ratio, and too much water in the concrete will lead to a decrease in the strength of the concrete, and it will also affect the durability and impermeability of the concrete.

Therefore, in the process of concrete construction, the water-cement ratio of concrete should be controlled to avoid the concrete being too dry or too wet, so as to ensure the strength and durability of the concrete. If it is necessary to add water to the concrete, it should be added according to a certain proportion and method of tung socks to avoid adverse effects on the strength and quality of the concrete.

The role of making concrete:

1. Building structure.

Concrete is one of the commonly used materials in building structures, which can be used to make building structures such as walls, columns, beams, etc., to support and carry the weight of buildings.

2. Roads and bridges.

Concrete can be used to make roads and bridges to carry the weight of vehicles and pedestrians, and at the same time has good durability and compressive properties.

3. Water conservancy projects.

Concrete can be used to make dams, reservoirs, canals and other water conservancy projects to ensure the storage and utilization of water resources.

4. Environmental protection engineering.

Concrete can be used to make environmental protection projects, such as landfills, wastewater treatment ponds, etc., to protect the environment and human health.

5. Decoration engineering.

Concrete can be used to make decorative works, such as garden landscapes, sculptures, etc., to beautify the environment and enhance the image of the city. <>

Concrete is an important material, and it is used in our daily life, such as floors, walls or when building houses. Can I add water when using concrete hailstones? What happens if I add water?

1. What is the impact of adding water to concrete?

1. Concrete can not be added at will, if water is added during on-site construction, it will lead to uneven surface phenomenon and will produce floating slurry. If the concrete is added with water, the strength will not meet the requirements, which will affect the overall use effect of the concrete.

2. Because the ratio of concrete will be changed after adding water, if the on-site construction is made of commercial concrete, that is to say, it has been blended, and it is not possible to add water. This kind of concrete has been configured in strict accordance with the proportion, if the water is added later, it will affect the effect of construction, such as after watering, its cement and lime ratio will become larger, the strength will be reduced, and the waterproof ability will also decrease.

2. Under what circumstances can water be added?

Because of the long-term transportation of some commercial concrete, coupled with the hot weather, a large amount of water will be lost at this time, and then water can be added appropriately to adjust the proportion of concrete. However, it is not possible to add water without permission, and the following requirements need to be met.

1. If water can be added, it must be treated in strict accordance with the ratio, and it needs to be stirred by professional equipment, so that the added water can be stirred evenly.

2. If it is to add water at the construction site, it needs to be agreed by the on-site staff, and the concrete mixer truck can be used to run at high speed for a few minutes before it can be mixed evenly.

3. If you use concrete with the number C10 or C15, you can add water, but you must also ensure that the strength meets the requirements, and you can not add excessive water, in order to ensure that its strength is not affected, you can also add admixtures.

Summary: Under normal circumstances, the concrete is successfully mixed with water during on-site construction, and can be used directly, but if the ratio of cement, sand and water is not correct, water can be added appropriately in this case, but the quality of concrete must be guaranteed.

We all know the role of concrete, our buildings and highways and other aspects will use concrete, we are not very professional do not know that concrete can not be added again after mixing, why is this? What are the effects of adding water to concrete? I'm going to give you an analysis today.

After the concrete is stirred, the phenomenon of incomplete mixing will occur after adding water again; In this way, it is easy to produce floating slurry, so that the concrete forms a weak layer, resulting in the situation of uneven strength, and in serious cases, it will affect the strength of the whole concrete project; And the density will also be reduced, and the waterproof function is not as good as the macro.

If you have to add water, how to solve it.

1. In the case of adding water, it is necessary to cover the requirements of the installation ratio of the skin, and stirring should be carried out at the same time as adding water, so as to avoid the floating slurry as much as possible.

2. If it is a concrete tanker, it should be stirred evenly inside before it can be used for construction.

3. When encountering C10 and C15 types of concrete, water can be added, but you should also pay attention to the amount, if you add too much water, it will also affect the strength of the concrete.

4. When adding water, some admixtures can be added, which can increase the viscosity of the concrete and ensure that the strength of the concrete does not affect the requirements of construction and use.

What is the process of making concrete.

1. Adjust the proportion of sand, cement and water according to the requirements. Concrete is mainly composed of water, sand and cement.

2. Mixing, mixing after the configuration is completed, now most of them are on-site mixing or mixing plant mixing after being transported to the site by a mixer truck before construction, and the time and sequence should be paid attention to in the process of mixing.

3. After the construction of concrete is completed, it is necessary to carry out maintenance, and the maintenance of different cavity methods will have an impact on the concrete, and the more common maintenance methods are steam curing, dry and wet heat curing, etc., depending on the specific environmental conditions.

The above is for you to sort out what is the impact of concrete after adding water, if it is not a last resort, it is best not to add water twice, and the concrete should be constructed as soon as possible after the mixing is completed, otherwise the water is easy to evaporate, resulting in hardening.