How to lay another layer of cement mortar on a smooth concrete floor so that it will not loosen?

In the polishedCement slabsA layer of concrete mortar is laid on it, how to do it so that it is not easy to loosen, and the length of the pipe is longer. In fact, there are many situations like thisAnyone who has ever done engineering construction will encounter it. In fact, there are many such conditions in rural areas, like the original cement prefabricated panels.

The ground is leveled, the roof is made of noodles, and the cement slab is made of terrazzo.

These are all similar to the situation that the subject is talking about. If you want to lay bricks and concrete mortar firmly and not easy to fall, Xiao Yang will talk about these problems with everyone.

The thickness of the concrete mortar paved: those who pay attention to the observation are likely to understand that if the concrete mortar is paved with a thin layer on the original cement slab, the 1 cm and 2 cm cement slab that is wiped off will be beautiful at first, but after a long time, cracks and fall off piece by piece. The main problem is that the concrete mortar is too thin, and the combination between the original wooden floor and the concrete mortar is insufficient.

The proportion of concrete mortar: this is important, concrete is originally a binder, and of course it can't be pasted if there is less concrete, not to mention a smooth cement floor.

The concrete mortar that was laid again was originally concrete mortar, not concrete.

The concrete stones are large, and there is no gravel to account for more concrete, and under normal circumstances, the proportion is 10% more concrete (if the manpower itself mixes, the concrete is placed in a large amount). The smooth cement board must be produced and processed: the smooth cement board, if a layer of concrete is added, the new concrete and wooden floor have no bite force at all.

After the cement board is done, it is long and the double layer is clearly organized, and if it is often hung on the top, it is easy to fall down.

Be sure to dig in the old floor or crush the log floor to make the concrete mortar fit more firmly with the floor. The concrete mortar paved is not overhanging: the concrete mortar paved only needs to be a pedestrian, it is 2 3 cm.

If the object is often overloaded, it is useless to excavate and/or break the cement slab. The key is that it is too thin, the concrete mortar is independent of itself, but the structural force is not strong, the pressure difference on one side, a little heavy goods, the cement slab will be destroyed and broken! I don't know if everyone is aware of thisThat is, the concrete floor will be polished very smooth after a period of time.

The other is that many good friends want to make a layer of cement grout on this very smooth concrete floor.

Lay another layer of cement mortar on the smooth cement floor, you can add a little anti-solidifying agent or add a little more cement.

The thickness of the cement mortar should be thicker, and you need to step on it with your foot, and then you don't have to worry about it, just let the wind solidify.

After spreading, it is best to apply plastic wrap, and then prick a few small holes, and then irradiate the sun for about 3 to 4 hours, and it can become particularly hard.

Laying a layer of cement mortar on a smooth cement slab, how to do it so that it will not loosen, and the pipe will take a little longer. In fact, there are really many such situations, and anyone who has ever done construction will encounter them. In fact, there are many such phenomena in the countryside, just like the original prefabricated slab leveling, the roof as a surface, the cement slab as terrazzo, etc., are similar to the situation mentioned by the subject.

If you want to lay bricks and cement mortar firmly and will not fall, Xiao Zhao will talk about this topic with everyone.

1. The thickness of the cement mortar paved: those who pay attention to the observation may know that if the cement mortar is paved with a thin layer on the original cement board, the cement board that is wiped out like this is 1 cm and 2 cm, which looks good at first, and after a long time, cracks and falls off piece by piece. The main problem is that the cement mortar is too thin, and the binding force between the original floor and the cement mortar is not enough.

2. The proportion of cement mortar:This is the key, the cement itself is the adhesive, and the cement will not be pasted if there is less, let alone the smooth cement floor. The re-paved cement mortar is originally cement mortar, not concrete, the concrete stone is large, and there is no sand to account for more cement, so 10% more cement should be added to the normal proportion (if you mix it manually, the cement will be more).

3. The smooth cement board must be processedSmooth cement slabs, when adding a layer of concrete, the new concrete and the floor do not bite at all. After making a cement slab, after a long time, the two layers are clearly layered, and if it is often too heavy on it, it is easy to fall off.

It is necessary to excavate or break the original floor in the old floor to make the cement mortar fit more firmly with the floor.

4. Whether the cement mortar is too heavyAs long as the cement mortar is pedestrian, it is 2 3 cm. If the weight is often excessive, it is useless to just dig and shatter the cement slab.

The key is that it is too thin, the cement mortar is independent of itself, but the structural force is not strong, the pressure difference of the single layer, a little heavy cargo, the cement board will be damaged and crushed! If the goods are too heavy, they must be fixed on the old cement slab, and then the steel wire mesh must be pulled on the steel bar. And it is not possible to use cement mortar, it is concrete, and the thickness shall not be less than six centimeters.

5. Before laying cement mortar, rinse the old cement board with waterThe old cement slab has been used for a long time, and there are a lot of dust and impurities, which are obstacles to the bonding of cement mortar. The purpose of washing with water is twofold, one is to wash away dust and impurities with water, and the other is that water is the starter agent for cement solidification, which can make the cement board bond more effectively.

In the self-built houses in rural areas, there are really a lot of cement mortar plasters, especially the first floor of rural houses, which are plastered with cement, which is economical, affordable and durable. However, indoors, there are generally no steel bars or steel wires, but the cement slab is excavated. Outdoor is different, it is necessary to use steel mesh weaving, but also to use steel bars (expansion screws) to fix, in the steel wire mesh, concrete to be more than 6 cm, in order to better make the cement mortar bonded together.

If you want to lay another layer of cement mortar on the smooth cement floor and it will not loosen, then the smooth cement board must be processed and the proportion of cement mortar is also critical, and 10% more cement should be added to the normal proportion. Before laying cement mortar, the old cement slab should be rinsed with water, so that it will not loosen.

The way to lay another layer of cement mortar on the smooth cement floor is to first chisel and mill the smooth ground to make it not so flat, so that it can be combined better; After the ground has been treated, it should be washed with water; Finally, the cement mortar should not be too thin.

The so-called cement mortar is combined with the original base layer, for example, we apply cement mortar on the wall, or make a layer of cement mortar protective layer on the ground, and our cement mortar will not appear hollow after completion.

1. If it is short-term, it needs to take effect immediately, and you can sprinkle some petroleum jelly lubricant and other oils on the ground; If you want to do it for a long time, you can do floor paint first, or you can use an electric polisher to polish it with water, and finally grind it with a layer of wax.

2. The cement floor is the ground paved with cement mixed concrete, which is more wear-resistant, but not beautiful enough.

3. The use of self-leveling, epoxy paint, a small area and the floor of the *** is almost the same.

Self-leveling: Self-leveling is a solvent-free, self-leveling, dense particle high-build epoxy floor coating. Self-leveling solves six major problems in floor installation. It is a kind of ground construction technology, it is a liquid substance mixed with water, after pouring into the ground, this substance can flow according to the unevenness of the ground, and automatically level the ground.

The application of self-leveling technology is first of all an innovation, the floor material in the liquid state will flow automatically after spreading to the ground, of course, this flow is not arbitrary, the liquid will automatically find the low-lying area on the ground and fill it, and finally the whole ground will flow into a mirror-like flat after static, condensation and solidification. The whole process does not rely on manual scraping.

First analyze the reasons:

1.The water-cement ratio is too large: that is, the amount of water in the mixed concrete is large, which leads to water leakage on the concrete surface and reduces the strength of the concrete surface.

2.Unreasonable gradation of sand and gravel and high mud content: Unreasonable gradation of aggregate and too fine soil and sand can easily lead to sand on the ground, affecting the early hydration of cement and the coagulation of concrete.

3.Excessive vibration during construction: exacerbates water leakage on the concrete surface, resulting in low concrete surface strength.

4.Improper maintenance: failure to maintain in time or insufficient maintenance, exposure to the sun or strong wind leads to a large amount of water loss on the surface of the concrete, and the surface is not fully hydrated, resulting in low strength.

5.Other reasons: poor grasp of calendering time, work on the concrete surface before reaching a certain strength, and freezing of the concrete surface under low temperature.

If you still want to have the effect you want, it is recommended that you add another layer of 5cm thick concrete, the quality of the concrete should be controlled, and after the concrete is poured, sprinkle a layer of cement ash on the concrete surface and then smooth it, there will be that effect!

The cement floor sand may be constructed when the temperature is frozen in winter, and the cement is frozen, and the second is that the mortar ratio is wrong (too much sand, and the cement is less) The solution is not to re-apply a layer of cement mortar, or dig out the original ground, and then wipe it again to become smooth.

When your cement floor is first poured, the cement is less, and the slurry cannot be collected, and the original pulp surface is like this.

If the area is relatively large, there is no way. Unless the floor is redone, or tiled.

The cement floor sand is mainly because of the use of less cement or the use of inferior cement, you can try to clean the ground, sprinkle water and then mix the cement with water to mix it thinner, evenly poured on the floor, can be combined with the ground for the second time, to prevent sand but will not be very light.

Dig a number of pits on the original ground (play the role of cement anchoring), clean the ground with water, apply a layer of cement paste, flatten, and dry it, I have done it.

The most important thing is that you did not do a good job of ground maintenance at the beginning, so you will splash the cement floor with water a few times now. For example, after splashing it for the first time, let the ground dry slowly and splash some water, anyway, you can't let the ground dry, and splash it for two days in a row. After two days of splashing, sprinkle dry cement on the ground, not too thin, but since it is sprinkled, you don't think about how thick it is.

Also remember to splash water again before sprinkling cement. Well, just sprinkle the dry cement and smooth the ground. After the cement is dry, it can be used for two days after sprinkling water and curing it like before.

The ground is absolutely smooth and smooth.

There is too little cement, and the tofu slag project is like this.

The cement should not be too thin, as this will lead to insufficient adhesion between the original floor and the cement. The proportion of cement should be accurate and good, and the smooth cement board must be processed.

The proportion of cement mortar is the key, the cement itself is the adhesive, and the cement cannot be pasted naturally without cement, let alone a smooth cement floor. The re-paved cement mortar is originally cement mortar, not concrete, the concrete stone is large, and there is no sand to account for more cement, so 10% more cement should be added to the normal proportion.

1. Spray the surface with an interface agent;

2. Brush one with cement + 801 glue;

An interface agent is an adhesive, which is generally made of vinyl acetate-ethylene. It is usually used on concrete surfaces because the concrete surface is too smooth. By using this product, the surface of the base layer can be roughened, the adhesion to the base layer can be increased, and the plastering layer can be avoided from hollowing out.

Interface agent is a general term for a class of treatment agents for the treatment of the surface of a certain object, which is widely used in industrial production, construction, military and other fields.

1. Spray the surface with an interface agent;

2. Brush one with cement + 801 glue;

Of course, you have to check the smooth surface to see if it is water resistant.

Use a good quality concrete interface treatment agent to do interface treatment, I can provide it.

LZ can go to the building materials market to buy something called interface agent, and ask the store for the construction method!!

If the cement floor needs to be smooth immediately, you can sprinkle a little petroleum jelly lubricant type oil on the ground, if it is to keep it smooth for a long time, you should first do floor paint, or use an electric polisher with water to polish, and then apply a layer of wax.

The reason for the sand on the cement floor: although most of the workers will be manually smoothed during the construction, the surface will form a floating slurry, and when the floor reaches a certain strength, the floating slurry on the surface will easily cause ash and sand, and it will crack for a long time.

The surface of the cement floor can be sprayed with ground hardener, and then polished, and the result will be very smooth and beautiful.