How to deal with cement after alkali return? Is cement alkali return a quality problem?

How to deal with cement after alkali return? Is cement alkali return a quality problem?

How to deal with alkali-resistant cement.

1. If there is alkali resistance due to unqualified materials, special attention must be paid to the selection of qualified materials and cement mortar during construction.

The mix ratio should be appropriate, so as to effectively prevent the occurrence of alkali resistance in the future while improving the strength.

2. If the room is too wet, when it rains, the doors and windows must be closed tightly, and corresponding waterproof measures must be taken. If the tube wall has been alkalized, oxalic acid can be used.

Cleaning, as acidic substances can react with alkaline substances on the pipe wall to achieve a neutralizing effect. If the alkaline conditions are severe, the walls need to be cleared, and then the construction can be carried out again to waterproof.

What is the cause of wall realkali.

When the walls are subjected to water vapor.

After the effect, part of the water dissolves the substance on the surface, so a solidification reaction occurs on the outside, which looks like a layer of gray hair. Over time, the hair on the wall will become more and more yellow, and in severe cases, it will even fall out.

The construction is not in place, such as the contractor commissioned the construction, the material is reduced, and the qualified materials are not selected, resulting in the later alkali prevention situation. If the indoor humidity is too high, it is also prone to alkali prevention problems. The situation is even worse if the walls are not waterproofed well.

Once the wall is disturbed by water vapor, it is prone to various problems, and the problem is more serious, which will make the whole wall yellow and fall off.

Is alkali-resistant cement a quality problem?

This is a quality issue, but we should check whether it is serious according to the degree of alkali resistance. Alkali resistance is basically caused by the humidity of the walls. For example, the waterproofing of the walls is not in place, which will occur in a humid environment for a long time.

It could also be the cement material used or the carbonates in the construction water.

Too many ingredients, combined with poor air circulation, led to a chemical reaction.

If there is an anti-alkali problem during the house inspection, you must report it to the developer immediately. Don't rush to collect the house, be sure to check it again after **, otherwise the problem will be more serious in the future.

If the cement is returned to alkali, it means that there is a problem with the proportion of cement. It is also possible that there is a problem with the quality of the cement itself, and it needs to be renovated at this time.

Under normal circumstances, the anti-alkali part will be scraped off, which is indeed a quality problem, and the waterproof is not done well.

Summary. Can cement brick return alkali be treated with light hydrochloric acid, you can choose the pickling method, using 1:10 (hydrochloric acid:

water) dilute hydrochloric acid for cleaning. Before cleaning, the surface of the pansoda part must be moistened with water, so that the dilute hydrochloric acid can fully react with the panda, and it can also prevent the hydrochloric acid from entering the interior through the pores of the concrete and corroding the internal steel bar.

Can cement bricks be treated with light hydrochloric acid, can you choose the pickling method, using 1:10 (hydrochloric acid: water) dilute hydrochloric acid for cleaning.

Before cleaning, the surface of the pansoda part must be moistened with water, so that the dilute salt can fully and quietly react with the pansoda as early as possible, and it can also prevent the hydrochloric acid from entering the interior through the pores of the concrete to corrode the internal steel bar.

Can the cement bricks that have not completed solidification return to alkali be treated with light hydrochloric acid?

Before cleaning, the surface of the panalkali part must be moistened with water, so that the dilute salt can fully react with the panalkali, and can also prevent the hydrochloric acid from entering the interior through the pores of the coagulation and denial, and corroding the internal steel bar.

How to deal with cement brick anti-alkali ?

The phenomenon of pan alkali is usually caused by the dialysis of brick joints, and the joints can be retreated. These white substances that come out of the tiles are: Cement pan alkali is a common disease on the surface of the building, according to its different causes and manifestations, there are frost, whitening, whitening, frosting, wall and decorative erosion and other names, is soil, soil trembling socks beam blank, brick, cement, mortar, concrete, masonry, tiles, coatings and other building materials with temperature, humidity and other external environment changes, in the process of water absorption, water migration, water evaporation with the physical, It is a disease phenomenon that destroys the original building materials due to the occurrence of chemical changes, and the degree of erosion and damage is also very different, and the common ones are resurgence, blistering, chalking, drumming, hollowing, cracking, peeling, mildew, crystallization and other phenomena.

Cement alkali may have certain reasons related to cement quality, sand, water, air, temperature, and humidity, which is a common problem in construction. The pebble shape made of cement is also prone to the above problems: a layer of white on the surface.

Solution: Scrape off the ash of the brick joints and re-hook the joints. The use of special grout, more corrosion-resistant, not easy to alkali.

Alkali return to cement wall refers to the alkaline substance inside the wall that gradually penetrates outward through the action of water and crystallizes on the wall, resulting in problems such as shelling, blistering, and falling off of the wall. Alkali return to the wall will not only destroy the aesthetics of the wall, but also affect the structural safety of the wall, so it must be dealt with in time.

First of all, it is necessary to find out the cause of alkali return. The main reasons for the dismantling of the alkali mill are poor cement quality, non-standard construction, wet ground at the base level, and leakage of water pipes. Depending on the reason, different measures should be taken, such as replacing materials, strengthening waterproofing, plugging water leaks, etc.

Secondly, it is necessary to completely remove the effects of alkali return. First of all, use a broom, scraper and other tools to remove the alkali salt crystals on the wall, and then rinse it repeatedly with clean water until the wall is dry. If the alkali return is more serious, you can use a chemical cleaning wide and simple agent for cleaning, but pay attention to the use method and dosage, and avoid secondary damage to the wall.

Finally, it is necessary to strengthen protection. After dealing with the problem of alkali return, it is necessary to strengthen the protective measures of the wall, such as adding a waterproof layer and improving ventilation, so as to prevent the problem of alkali return from recurring.

To sum up, cement wall alkali return is a common wall problem, which must be dealt with in time. Ways to deal with it include identifying the cause, removing the impact completely, and strengthening protection. Only by taking the right approach can you keep your walls looking good and structurally safe.

A1 For pickling, you can add 5% to 10% oxalic acid solution, but the water temperature should be controlled at about 60%, and the oxalic acid solution should be brushed directly to the ground, so that it can be neutralized with the alkalinity of the seam sealant.

2. Washing, you can use clean water on the ground to rinse repeatedly, and the base layer should be dried for 3 days before it can be washed, but the drying time of the floor tiles should be determined according to the environment.

Alkali return or surface hoarfrost is calcium hydroxide produced by cement hydration, and as water migrates from the inside to the surface, the water evaporates calcium hydroxide crystals and precipitates to form white spots. To prevent alkali return, we should mainly start from two aspects: 1) reduce the permeability of concrete and prevent water migration.

2) The use of active admixtures, such as fly ash, mineral powder, silica fume, etc., can undergo a secondary hydration reaction with the calcium hydroxide produced by cement hydration, and convert the calcium hydroxide into calcium silicate gel, so that the concrete has no alkali to return.

The use of reactive admixtures has the dual effect of reducing the permeability of concrete and eliminating alkali. Among them, silica fume has the best effect and can also improve strength, but the cost is relatively high. Fly ash and mineral powder need to be mixed in large amounts, which can reduce costs, but will reduce the early strength of concrete.

To reduce the permeability of concrete, you can also use some waterproofing agents and waterproof coating materials.