What is the difference between the pre laying and wet laying methods in waterproofing membranes

1. The nature is different: pre-paving is to pave the waterproof membrane in advance, and in the tunnel waterproof construction, pre-paving is to pave the waterproof membrane first. Wet laying is to lay the waterproofing membrane when the base surface is wet, and it is not necessary to require the base surface to be dry.

2. Different characteristics: wet paving is the adhesive used in some waterproofing membranes, which can firmly bond the waterproofing membrane with the base layer on the wet base surface. Pre-paving has low requirements for the base surface, high degree of construction freedom, is not affected by weather changes, and can be constructed on the wet base surface.

3. Scope of application: Wet-laid waterproofing membrane is suitable for waterproofing projects of basements and roofs of industrial and civil buildings. Pre-paving is suitable for basement floors and other parts suitable for empty paving.

Pre-paving is to lay the waterproof membrane in advance In the tunnel waterproof construction, pre-paving is to first pave the waterproof membrane and then pour the concrete Concrete can be firmly bonded with the membrane The construction of the waterproof membrane is generally required to be smooth and dry.

Wet laying is to lay the waterproofing membrane when the base surface is wet, and it is not necessary to require the base surface to be dry, which is for some waterproofing membranes, and the adhesive used in some waterproofing membranes can firmly bond the waterproofing membrane with the base layer on the wet base surface.

Wet paving is to pave the waterproof membrane under the condition that the base surface is wet, and it is not necessary to require the base surface to be dry, which is for some waterproofing membranes, and the adhesive used in some waterproofing membranes can firmly bond the waterproofing membrane with the base layer on the wet base surface Pre-paving is to lay the waterproofing membrane first, and then pour the concrete, the concrete can be firmly bonded with the membrane, and the construction of the waterproof membrane is generally required to be flat and dry on the base surface.

The reasons for the construction of indoor waterproofing membrane are as follows:

1. The air humidity is too high during construction;

2. The surface of the base layer is too bright;

3. The base of the wall is loose, dirty and damp.

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Outdoor: waterproof membrane, if it is an external anti-external pasting method, it should be paved first and then the façade. External defense and external sticking method, when the membrane begins to be laid, only a very low temporary protective wall (temporary protection, but also for the temporary foothold of the membrane), it is necessary to first construct the membrane of the plane, and then the membrane is from the plane to the façade of the temporary protective wall, and the stubble is thrown to the top of the temporary protective wall (similar to the roof parapet wall, using the empty paving method), and then the foothold cannot be thrown first, so the construction plane needs to be built first.

After the construction of the exterior wall is completed (generally at the same time, the temporary protection wall should be heightened to prevent the membrane from being damaged), and the membrane needs to be torn off and glued to the exterior wall. The roll is finally glued to the façade.

If it is an external defense and an internal sticker, it should be paved with the façade first, and then the plane. Before the membrane begins to be laid, it is necessary to make a permanent protective wall on the outside of the outer wall, and the height of the protective wall follows the height of the external wall, and the membrane needs to be fully glued to this permanent protective wall (because it does not need to be torn off).

It is mainly for the convenience of construction, cross construction, and does not affect the construction of flat coils. The roll is eventually glued to the protective wall.

Indoor: pave the façade first, and then pave the plane, the same as the outdoor exterior anti-interior sticking method, mainly for the convenience of construction. You have to pave the plane first and then the façade, so that the membrane will not be sparse by your stepping.

The above is a personal explanation. Those who disagree can**.

There is no such statement, and it is generally paved according to the situation of the construction surface, in the order of water flow from low to high.

When the hot melt method is used for the construction of the waterproofing membrane, the following processes can be carried out:

1. Clean up the base layer before construction, and determine that the dryness of the base layer meets the construction requirements;

2. Place the waterproof membrane in the direction of parallel to the ridge according to the slope of the roof, and loosen the roll;

3. Ignition: first unscrew the switch of the liquefied gas cylinder, then slowly unscrew the gun switch with the spray gun handle, and when you hear the hissing sound of the gas spray, ignite the flame, and then adjust the switch to make the flame blue. The igniter should stand behind the side of the sprinkler to avoid being burned by the flames;

4. Roll roll rolling: first turn the end up about 1m long, melt the hot melt adhesive on the bottom surface with a long blowtorch, quickly paste and fix it on the base layer, and then re-harvest the rest into a roll. The gun bearer stands on the paved coil, uses the flame of the long spray gun to aim at the angle between the coiled coil and the surface of the base layer, and slowly rolls forward while melting the hot melt glue, so that the roll is pasted on the base layer;

5. Lap joint treatment: After the membrane is paved, the lap joints of the adjacent two coils should be welded and glued with a short blowtorch, heated to the degree of overflowing hot melt viscose, and then evenly heated and wiped the edge of the joint with a flame and an iron trowel;

6. Seal the lap edge of the coil.

It's not the same. 1. Waterproof membrane dry start shooting and transportation shop: After the base is cleaned, the self-adhesive membrane construction method is applied to the base with a brushing base treatment agent and the node is strengthened.

Dry paving requirements: grassroots maintenance to the specified age; The surface of the base layer is smooth, dry, and cleaned, and the yin and yang corners are wiped into an arc.

2. Wet laying of waterproof membrane: After cleaning the base surface, stirring and paving cement slurry as a base treatment agent and binder after wetting the base layer, and then paving the construction method of the membrane.

Wet paving requirements: the surface of the base has been cleaned up, and basically flat, no obvious protruding parts, the base surface shall not have open water during construction, if there is a stagnant water part, it is necessary to carry out drainage before construction, all kinds of embedded structures, accessories have been installed, fixed firmly.

Hello, now I am here to answer the above questions for you. What does pre-paved waterproofing membrane mean, what is pre-paved waterproofing membrane, I believe many friends still don't know, now let's take a look! 1. One. <>

Hello, now I am here to answer the above questions for you. What does pre-paved waterproofing membrane mean, what is pre-paved waterproofing membrane, I believe many friends still don't know, now let's take a look!

1. Pre-paved waterproofing membrane in a general sense: waterproofing membrane laid before structural construction.

2. Broadly speaking, it can be a special coil or an ordinary coil.

3. "Pre-paved waterproofing membrane" specified in the specification: waterproof material that meets the technical requirements of the technical indicators of pre-paved waterproofing membrane in the standard of "Pre-paved and Wet-laid Waterproofing Membrane".

4. It refers to the waterproof membrane in which the structural concrete is directly poured on the waterproof membrane, and the self-adhesive layer of the membrane produces good adhesion with the concrete, so as to achieve the effect of pre-paving and anti-adhesive.

5. It includes two categories: polymer as the main body of the surface composite with a self-adhesive layer of coil and modified asphalt as the main body of polyester tire self-adhesive coil.

6. It is unscientific to define "pre-paved waterproofing membrane" as a type of waterproof material, and "pre-paved" is only a construction process, and the material standard should be a type of waterproof material with the same physical and chemical characteristics.

7. The characteristics of Chanchang Royal Products have low requirements for the base surface, high degree of construction freedom, and are not affected by weather changes, and can be constructed on the wet base surface.

It can greatly shorten the construction period, save costs, and the construction can be done by two construction methods: wet paving and pre-paving.

The wet paving method can achieve full adhesion with the base surface, and the pre-paving method can achieve full adhesion with the structure, reliable bonding, safety and environmental protection.

10. Scope of application: waterproofing projects of basements and roofs of industrial and civil buildings.

It is suitable for waterproofing subways, highways, railways, bridges and tunnels.

12, the construction method will be the base surface clean, the base can be wet, but can not have open water, wet paving method construction, dry base need to sprinkle water wet stream, dry paving method construction, can be directly on the dry base layer brush base treatment agent 2, the use of not less than ordinary silica cement to prepare polymer mortar, according to the weight ratio of 1:10 polymer masterbatch and cement dry stirring evenly after the water into a slurry, water-cement ratio, stirring with an electric mixer for 1 2min, mixing well and standing for 5 8min after standby.

The mixed polymerized amutop-resistant rock cement mortar is evenly scraped on the base layer with a scraper, and the pre-paved wet paved waterproof membrane is paved on the top while scraping the polymer mortar, and the exhaust rolls and sticks firmly.

The joints of the adjacent two coils are lap jointed, and the reserved isolation belt with the self-adhesive edge can be directly pasted during construction, and finally the edge is sealed with special sealing paste.

15. Precautions: The coil should be stored in a dry and ventilated environment.

Different categories and specifications of coils should be stacked separately, the storage temperature should not exceed 45, the stacking height of coils should not exceed five layers when they are stored horizontally, and they should be stacked in a single layer when they are stored vertically.

First of all, it is necessary to moisten, smooth and clean the base layer, and then start to wipe the cement, tear off the separator film of the waterproof membrane, and then laminate it with the cement by patting the surface of the membrane, and finally seal the butt mouth.

The process of self-adhesive wet laying of waterproof membrane is more troublesome, so let's take a look at this aspect together.

1. Construction process of wet-laid self-adhesive waterproof membrane.

First of all, it is necessary to moisten, smooth and clean the base layer, and then start to wipe the cement, tear off the separator film of the waterproof membrane, and then make the surface of the membrane by tapping the key to make it fit with the cement, and finally seal the butt mouth.

Second, what problems should be paid attention to in wet laying self-adhesive waterproofing membrane.

1. The first thing that needs to be paid attention to is the cleanliness of the surface, and at the same time, it is necessary to maintain the smoothness of the surface before construction.

2. Pay attention to the thickness of the cement when plastering, under normal circumstances, its thickness is about 20 mm, and it depends on the smoothness of the base layer.

3. When the rubber seal is on the interface, we must pay attention to the problem of sealing and butt joints, and the butt joints must be tightened.

Third, the advantages of waterproofing membrane.

1. Most families use polymer waterproof membrane, which is more convenient for construction, and the construction period is particularly short, which can help you save a lot of money.

2. The polymer waterproof membrane also has a good temperature resistance effect, which will not be affected by the change of temperature, and is also relatively environmentally friendly.

3. There is no need for maintenance in the later stage of using this kind of coil, so there is no need for any maintenance costs.

4. The production requirements of this coil are relatively high, and the layer thickness needs to be uniform, so it is not easy to cut corners, so there is no need to worry about this problem, but the price of this coil is still relatively high.

Hello dear! The advantage of the waterproofing membrane wet laying method is that the composite waterproofing system attaches the waterproof layer to the structure for a long time, and is suitable for waterproofing membranes bonded with post-pouring mixed pure soil or cement mortar mixture. It can melt and penetrate with cement concrete in the process of hydration reaction, so as to form an inseparable whole.

It can solve the problem that the waterproofing membrane can no longer be bonded to the wet substrate, and the advantages are very obvious compared with the traditional waterproofing membrane. The above is Henan asphalt waterproofing membrane manufacturers to give us a detailed explanation of the use of waterproofing membrane precautions, I hope it will be helpful to everyone. Pre-paving is to lay the membrane, in GB T23457 it can be seen that the pre-paving has the performance of repelling cherry blossoms and blind water, and the wet paving class corresponds to impermeability, from the test method, you will find that the test process of waterproof channeling is to lay the membrane first, then pour the concrete, and then test the specimen after forming.

Wet paving refers to paving in wet conditions, not when there is water. In other words, it is laid while the concrete is still wet during the curing period. Both are generally used in underground works, the difference is that paving before pouring concrete and paving after pouring concrete.