How to prevent cracking of foamed cement insulation board

The external insulation of foamed cement insulation board should be done from the following aspects:

1.Control of raw materials. Due to the fact that there are many manufacturers of insulation materials on the market, the quality of their products is also uneven.

Practice has proved that the quality of insulation materials is also an important factor causing cracking of external wall insulation. The main components of the anti-cracking mortar of external insulation are pure acrylic acid resin and silica sand, acrylic acid resin plays the role of water resistance and weather resistance in the adhesive, the content plays a role in anti-cracking, and silica sand plays a role in strengthening adhesion. In order to fundamentally control cracking, suppliers must provide weather resistance test reports, and only then can they be controlled from the material.

Therefore, we should not purchase auxiliary materials such as insulation board and adhesive glue, anchoring expansion bolts, mesh cloth, polymer mortar and interface agent separately, and should purchase in regular manufacturers and carefully test the thermal indicators of thermal insulation materials, resolutely do not use substandard products, and strictly control raw materials.

2.Prevent the hollowing of the foamed cement insulation board. When applying rubber powder in construction, do not pay attention to details, such as the 50mm wide exhaust duct around the foamed cement insulation board frame, forming drainage, poor exhaust and expansion and contraction stress, resulting in internal pressure peeling hollowing.

The hollowing caused by the excessive application area or the speed is too fast and not compacted, the local hollowing caused by the unevenness of the foamed cement insulation board caused by excessive force and the foamed cement insulation board is pried up, and the base is not treated, such as dust on the wall, the base layer is dry and absorbs water quickly, etc., it should be drenched with water in advance to moisten and rinse the base layer to prevent the dry powder isolation layer formed by dust and the dehydration of the rubber powder caused by the drying and water absorption of the base layer too quickly to produce the hollow cracking of the foamed cement insulation board.

3.For the cast-in-place slab concrete built-in insulation board net system, the length of the internal oblique insertion wire of the insulation board into the concrete wall shall not be less than 30mm, and the additional anchoring fixing parts on the board surface shall be treated with anti-rust, and the length of the anchor into the wall shall not be less than 100mm.

4.The cast-in-place slab concrete formwork has a built-in insulation system, and the contact surface of the insulation board is provided with a mortar cushion block, and the concrete pouring height should not be greater than 1m, and it is strictly forbidden to cut the foamed cement insulation board, and the vibrating rod shall not touch the polystyrene board.

5.When pasting foamed cement insulation board, the flatness of the base layer should be controlled within 3mm, and the area of adhesive should not be less than 40%. The foamed cement insulation board should be pasted in a smooth manner, the vertical joints should be staggered line by row, and the foamed cement insulation board joints at the corners of the wall should be staggered and interlocked.

The foamed cement insulation board at the four corners of the door and window openings should be cut and formed by the whole board, and the joints should be at least 200mm away from the corners.

The cracking of cement foam insulation board is as follows:

First, from the perspective of crack time, it is divided into pre-cutting cracking and post-cutting cracking.

Second, from the perspective of the length of the crack, it is divided into crushed powder cracking and chasm cracking.

Therefore, it needs to be analyzed specifically, and there are several ways to solve it:

1. Increase the amount of dispersible fiber;

2. Adjust the amount of activator, too much stimulant bubbles to cause cracking, and too little activator causes foaming dissatisfaction;

3. Maintenance is the key, water retention is natural maintenance, and wind and sun are taboo.

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The cracking of cement foam insulation board is as follows:

First, from the perspective of crack time, it is divided into pre-cutting cracking and post-cutting cracking.

Second, from the perspective of the length of the crack, it is divided into crushed powder cracking and chasm cracking.

Therefore, it needs to be analyzed specifically, and there are several ways to solve it:

1. Increase the amount of dispersible fiber;

2. Adjust the amount of activator, too much stimulant bubbles to cause cracking, and too little activator causes foaming dissatisfaction;

3. Maintenance is the key, water retention is natural maintenance, and wind and sun are taboo.

The exterior wall insulation composite foam cement board can be broken by hand.

Hello dear! I've seen your question and I'm trying to sort out the answer, and I'll get back to you in five minutes, so please wait a minute

Hello, happy to answer your <>

The cracking situation of cement foam insulation board is as follows: first, from the point of view of crack time, it is divided into cracking before cutting and cracking after cutting, and second, from the perspective of crack length and size, it is divided into crushed powder cracking and chasm cracking and Huai loss cracking, so it needs to be specifically analyzed, and the solutions are as follows: 1. Increase the amount of dispersible fiber; 2. Adjust the amount of activator, the activator is too bubbling to cause cracking, and the stimulant is too bright and bent to cause foaming dissatisfaction; 3. Maintenance is the key, water retention is natural maintenance, and wind and sun are taboo.

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It's a new house that my family bought.

Is it a quality problem to make a hole with your hands?

You can find a renovation company for any situation.

Ask the reason and then go to the development company.

Yikes. Normal composite foamed cement board exterior wall, will this be the case?

A question that is not a cause To ask them why, you just need to explain the situation.

How much should it resist compression.

This has to ask them pro, we are not professional technicians here.

I hope the above is helpful to you If you are satisfied with me, please give a thumbs up Welcome to the consultation <> next time

We can see cement foam insulation board in the insulation project of the outer retaining wall of many buildings, which is an emerging environmentally friendly building material, which is often used as a fire door core board, wall insulation project and roof insulation board, and is also a good insulation material. So what are the characteristics of cement foam insulation board? What are the precautions for its use?

What are the characteristics of cement foam insulation board.

1.Cement foam insulation board is a new type of environmentally friendly building decoration materials, in the process of use, it will not produce and release the most toxic odor and toxic gas, will not produce a threat to human health, and will not cause pollution to the surrounding environment, so that consumers can use it with confidence.

2.Cement foam insulation board has good thermal insulation, sound insulation, fire resistance and high temperature resistance, can be applied to all kinds of building decoration or other wall insulation projects, its installation process is very convenient, fast, compared with traditional building insulation materials, with multiple use of safety guarantees.

3.Compared with other insulation materials, cement foam insulation board has a low water absorption rate, even in a very humid environment, it can play its thermal insulation role normally, has a long service life, is a durable inorganic insulation material, generally only need to do a thermal insulation construction can be done.

4.Cement foam insulation board has good advantages in thermal insulation effect, flame retardant effect and product material, which can save the cost of building and eliminating the cost of insulation engineering of the outer wall of the collapsed building to a certain extent. Precautions for cement foam insulation board.

1.If the base wall of the building is made of concrete and aerated concrete, then a layer of interfacial agent can be brushed on the surface of the wall to improve the adhesion between the cement foam board and the wall.

2.Before construction, cement mortar should be used to level the base wall of the decoration building, and then clean up the impurities around it after leveling, otherwise it is easy to paste the cement foam insulation board with certain difficulties in the later stage.

3.We should try to choose to buy high-quality adhesive mortar products, otherwise it is easy to affect the safe performance of cement foam insulation board, because the weight of cement foam insulation board will be heavier than traditional insulation materials, so it needs adhesive mortar with stronger bonding effect for construction. 4.

When spraying the surface glue layer, it is necessary to pay attention to the treatment of its thickness to prolong the service life of the cement foam insulation board. If its thickness is too thick, it will cause the surface glue slurry layer to crack and cannot be used normally; If the thickness is not enough, it will not be able to achieve the expected thermal insulation effect, and it is also useless.

My conclusion: I will temporarily introduce the relevant knowledge of cement foam insulation board here today, and I hope that friends who are troubled in this area can be helpful. If you still want to know or consult more relevant information, welcome to pay attention to the decoration security network!

1. Before the construction of the foamed cement Yeqiao insulation board, the outside of the base wall should be cleaned and dusted if necessary. It is advisable to use cement mortar for leveling, which can improve the flatness of foamed cement board paste. When the base wall is concrete ridge lead soil and aerated concrete, its surface should be coated with interface agent to improve its cohesiveness.

2. Because the foamed cement board is ten times heavier than the FPS board and other high-efficiency insulation materials, in order to ensure the safety of the system, the adhesive mortar produced by the regular manufacturer and the performance should be up to standard, and the full bonding method should be applied and the anchors and supporting brackets should be set. In case it falls off!

3. The plastering mortar layer in the foamed cement board insulation system mainly plays the role of waterproof and impact resistance, and should have a small water vapor permeability resistance. If the thickness is too thin, it will not achieve enough waterproof and impact resistance, and if it is too thick, it will cause the cracking of the plastering paste layer because the transverse tensile stress exceeds the tensile strength of the alkali-resistant glass fiber mesh, and the water vapor penetration resistance will exceed the design requirements. Therefore, the thickness of the plastering glue layer must be mastered.

In this way, the insulation layer is not easy to hollow and fall off, and the use performance and life are longer.

4. Foamed cement insulation board is a new type of thermal insulation building material, which not only has the advantages of good thermal insulation, sound absorption, seismic resistance, fire prevention, and convenient construction, but also has the same life as the building, and can be applied for life at one time.

As soon as I heard it, I guessed that the foamed cement insulation board was made using chemicals. Foamed cement insulation board can be insulated, fire-resistant, anti-corrosion, wear-resistant, soundproof and so on. Nowadays, many houses are built with this kind of insulation board.

In particular, bars, Internet cafes, and hotels are the most popular. Today, we not only understand the foamed cement insulation board process, but also understand its advantages and disadvantages and a series of issues. Well, let's take a look at some of the introductions about foamed cement insulation boards below.

Basic introduction. Chemical foaming: The foaming agent is added to the slurry made of cement-based cementitious materials, aggregates, admixtures, admixtures and water, mixed and stirred, and poured to make it produce closed pores inside the slurry through chemical reaction in the mold, and the insulation board is cured and cut.

Craft. 1. Feeding and mixing: through the feeding system, the quantitative cement, foaming agent and foam stabilizing enhancing dust agent are added to the mixer, and the dry mixing is carried out for 30 seconds;

2. Stirring: Add a certain amount of warm water to the blender and stir wet for 2 minutes; Add a certain amount of foaming agent to the mixing machine and stir for 8-15 seconds;

3. Injection molding and foaming: then inject the slurry into the mold for foaming, and the foaming process takes about 3-5 minutes;

4. Initial maintenance: After the injection mold is completed, it will be allowed to stand for several hours for initial maintenance;

5. Demolding: When the foamed cement insulation board completes the initial setting and has the initial strength, it can be demoulded;

6. Cutting: The foamed cement insulation board blank with a certain strength can be cut after demolding, and the cutting specifications are adjusted according to the cutting blade;

7. Finished product curing: the curing age of foamed cement insulation board should not be less than 7 days.

Advantages and disadvantages:

Advantages: Foamed cement insulation board is the most ideal insulation material for wall insulation and wall insulation fireproof isolation zone, with low thermal conductivity, good thermal insulation effect, non-combustion, waterproof, strong adhesion to the wall, high strength, non-toxic radioactive substances, and environmental protection. It is the same as the service life of the building, and the construction is simple and fast.

The technical performance is better than that of wall insulation materials such as foam glass, foam ceramics, phenolic foam boards, polystyrene particles, polystyrene boards, and extruded plastic boards.

Disadvantages: low strength (brittle), high water absorption, can not be compared with foam glass, foam ceramics, phenolic foam board, polystyrene particles, polystyrene board, extruded board and other wall insulation materials.

From the above understanding, we all know that the foamed cement insulation board process is a very cautious process. Foamed cement insulation board is sold more vigorously in the market. The use of foamed cement insulation boards to build houses saves time and money.

It is the choice of many people nowadays. But the best things still have pros and cons. Of course, the foamed cement insulation board is what we want, but the shortcomings of the foamed cement insulation board we still have to use according to its precautions to avoid safety accidents.

You can get it for free

1. Feeding and mixing: Add the quantitative cement, foaming agent and foam stabilizing enhancer to the mixer through the feeding system, and dry mix for 30 seconds.

2. Stirring: Add a certain amount of warm water to the blender and stir wet for 2 minutes; Add the quantitative blowing agent to the blender and stir for 8-15 seconds.

3. Injection molding and foaming: then inject the slurry into the mold for foaming, and the foaming process takes about 3-5 minutes;

4. Initial maintenance: After the injection mold is completed, the initial maintenance is carried out when a number of small destruction forests are placed.

5. Defiberization stupid mu mold: when the foamed cement insulation board completes the initial setting, it can be demoulded when it has the initial strength.

6. Cutting: The foamed cement insulation board blank with a certain strength can be cut after the blank is demolded, and the cutting specifications are adjusted according to the cutting blade.

7. Finished product curing: the curing age of foamed cement insulation board should not be less than 7 days.