The walls of rural sand and stone are coated with mortar, how can they be firm.

In the countryside, when applying mortar to the sand-stone wall, there are several steps to make it firm:

1.Clean the wall: First, clean the wall with an appropriate method to ensure that the surface is free of debris and loose sand.

2.Wet the wall: Before applying the mortar, make sure the wall is moist, but not excessive, to avoid the mortar being washed away by water.

3.Choose the right mortar: Choose a mortar with strong adhesion, such as a mortar with added loess, cement, fine sand and lime, so that the adhesion of the mortar is greatly enhanced.

4.Apply correctly: Apply the mortar evenly to the wall, the thickness of each application should be moderate, too thick may cause the mortar to dry unevenly, too thin may affect the firmness.

6.Meticulous trimming: After the mortar is completely dry, a meticulous trimming is carried out to ensure that the surface is smooth and free of bumps or dents.

Through the above steps, the adhesion of the mortar to the wall can be increased, making the wall more firm.

First. You have to shovel off the old cement mortar on your wall to prevent it from falling off twice. Then drizzle the walls with water. Then your slurry material has: loess + cement + fine sand + lime, so the adhesion is greatly enhanced. Hope.

I guess it was made of red bricks at the time, otherwise it wouldn't last for decades, and you still want to smear a layer of cement mortar on it.

Brick walls that have been exposed for many years, or have been soaked in water or covered with vegetation, will also have a chalking surface over time. It turns out that the masonry materials used for bricklaying may have been triple soil and the like a few decades ago, and even if it is a masonry mortar mixed with cement and sand, the surface will be pulverized for more than ten years. In this way, if a layer of cement mortar is smeared on the outside, then these chalking problems must be solved first.

In fact, it is also simple, find some hard tools, and remove the differentiated parts, such as wire brushes, bamboo brooms and other tools. After rejection, it is best to rinse with water again to wash off the floating ash. In this way, the cement mortar can be constructed.

However, it should be noted that decades of old walls, after repainting plastering mortar, the life of new wall plastering is shorter, and after a few years, there may be local hollowing off, which is inevitable.

The walls are cleaned well, not wet, and basically fine.

This situation in your family can be handled in the following ways:

1. Remove the original tile and the plastering layer of the base layer.

2. Remove the double ash powder wall skin above;

3. If the wall is a light brick or red brick wall, use hanging net cement mortar plastering to find leveling (when plastering cement mortar, the wall should be sprinkled with water and moistened to prevent the wall from absorbing the moisture in the cement mortar too quickly);

4. After the cement mortar plastering layer is dry and solidified, the wall surface is brushed (the wall needs to be sprinkled with water to moisten the wall surface of the dry and solid plastering layer before brushing, the principle is the same as above 3).

5. After the brushing layer is dry and solidified, cement mortar is used to pave the tiles (when using cement mortar to pave tiles, it is necessary to sprinkle water and moisten the brushing layer, the principle is the same as above).

6. During the construction process, pay attention to the uniform and full coating of cement mortar to prevent the tile from hollowing in the process of tiling.

7. The tile should not be gripped before it is paved and solidified, and it is advisable to carry out at least 24 hours after the tile is paved.

8. After the tile is paved, the tile construction is accepted and checked for hollowing.

It is best to use a polisher to clean up the original white ash, rinse the floating ash with clean water and paste the wall tiles.

The thickness of the first plastering mortar is 2mm 3mm, and the thickness of the second plastering mortar is 3mm 4mm.

All mortars applied to the surface of buildings or building components are collectively referred to as plastering mortar. According to the different functions of the plastering mortar, the plastering mortar can be divided into ordinary plastering mortar, decorative sand and plastering mortar with some special functions (such as waterproof mortar, thermal insulation mortar, sound-absorbing mortar and acid-resistant mortar, etc.). The plastering mortar is required to have good workability, and it is easy to plaster into a uniform and flat thin layer, which is convenient for construction.

It should also have a high cohesion, and the mortar layer should be able to bond firmly with the bottom surface, and it will not crack or fall off for a long time. In a humid environment or susceptible to external forces (such as floors and wall skirts, etc.), it should also have high water resistance and strength.

Plastering mortar is often constructed in two or three layers

1. The function of the bottom mortar is to make the mortar and the base layer firmly bonded, and it should have good water retention.

2. The middle layer is mainly for leveling, and sometimes it can be omitted.

3. The surface layer is mainly to obtain a smooth and smooth surface effect.

The construction and acceptance code for building decoration engineering, the average total thickness of the plastering layer shall not be greater than the following provisions:

1. Roof: slats, hollow bricks, cast-in-place concrete 15 mm; precast concrete 18mm; Metal mesh 20mm.

2. Interior wall: ordinary plastering 18mm; Intermediate plastering 20mm; Premium plastering 25mm.

3. The outer wall is 20mm; Leg and protruding wall part 25mm.

4. Stone wall 35mm.

The purpose of controlling the average total thickness of the plastering layer is mainly to prevent the plastering layer from falling off.

Ceiling plastering, the plastering layer depends on the adhesion of plastering mortar or mortar and the ceiling surface, so that the plastering layer can stick to the roof surface, when the plastering layer is too thick, the self-weight of the plastering layer exceeds the adhesion force, the plastering layer will automatically fall down. And because the size of the adhesion is related to the smoothness of the roof surface, the smoother the roof surface, the smaller the adhesion force. Therefore, the control thickness of the plastering layer of slats, hollow bricks and cast-in-place concrete roof surfaces is smaller than that of precast concrete roof surfaces.

If there is a metal mesh on the ceiling surface, the thickness of the plastering layer on the metal mesh can be larger because the mortar can be embedded in the grid, which increases the tie force.

Wall plastering, the plastering layer relies on the adhesion between the plastering mortar and the wall and the friction between the plastering layer and the wall, so that the plastering layer can stick to the wall. When the thickness of the plastering layer is too thick, and the weight of the plastering layer exceeds the sum of friction and adhesion, the plastering layer will fall off. And because the adhesion and friction are related to the degree of wall smoothness, the rougher the wall, the greater the adhesion and friction, so the thickness of the stone wall plastering layer is greater than that of the brick wall.

The thickness of the interior wall plastering layer should be determined according to the plastering grade, and the thickness of the advanced plastering control is larger than that of ordinary plastering, which is due to the fact that the surface flatness of the advanced plastering is higher than that of ordinary plastering, that is, the allowable deviation of the surface smoothness is smaller, and the surface flatness of the plastering layer is adjusted by the thickness of the mortar layer, and the higher the surface flatness, the more generous the thickness of the mortar layer used to adjust.

It is best to build the wall, first batch a layer of interface agent, then put a layer of mesh cloth, then batch a layer of interface agent, and then batch putty, so that there is no empty valley in the later stage of the wall.

This is red bricks, light bricks need cement leveling and steel wire mesh, otherwise it is easy to crack.

You ask him, do you still want to be paid?

1. Different properties: plastering mortar is a kind of mortar that should be applied to level or provide protection on the base surface of the building. Masonry mortar is a mortar that turns bricks, stones, blocks and other blocks into masonry.

2. Different characteristics: the walls of masonry mortar multi-storey houses are generally made of cement lime with a strength grade of M5. Plastering mortar is divided into on-site stirring mortar and ready-mixed dry powder plastering mortar according to different operations, and ready-mixed dry powder plastering mortar is one of the commercial mortars.

3. Different uses: plastering mortar, such as lightweight walls such as aerated concrete blocks, fly ash blocks, ceramsite bricks, etc., and plastering mortar that is directly scraped on the surface of concrete shear walls. If the cement strength grade of masonry mortar is too high, some mixed materials can be added.

For some special purposes, such as configuring joints and joints of components, or for structural reinforcement and repair of cracks, intumescent cement should be used.

1. Different uses: plastering mortar is a mortar that is smeared on the surface of buildings or building components; Masonry mortar refers to the mortar of bricks, stones, blocks and other blocks into masonry.

2. Different functions: plastering mortar is often divided into two or three layers for construction, and the role of the bottom mortar is to make the mortar and the base layer firmly bonded, and should have good water retention; The middle layer is mainly for leveling, and sometimes it can be omitted; The main purpose of the surface layer is to obtain a flat and smooth surface effect.

Masonry mortar plays the role of bonding, lining and force transmission, and is an important part of masonry. Cement mortar is suitable for masonry in humid environments and masonry with high strength requirements.

3. Different requirements: plastering mortar requires good workability, easy to wipe into a uniform and flat thin layer, and convenient for construction; It should also have a high cohesion, and the mortar layer should be able to bond firmly with the bottom surface, and it will not crack or fall off for a long time. In a humid environment or susceptible to external forces (such as floors and wall skirts, etc.), it should also have high water resistance and strength.

The mix ratio of masonry mortar is generally checked in the construction manual or according to experience; The strength and durability of masonry mortar should meet the design requirements; The economy should be reasonable, and the amount of cement and admixture should be small.

1. Different uses.

Masonry mortar is used for masonry masonry, that is, the masonry of walls. Plastering mortar is used for plastering the surface of the wall.

2. The waterproof requirements are different.

There is no waterproof requirement for bricklaying mortar, and the plastering mortar should be mixed with a certain waterproof agent in the ordinary mortar, and the commonly used waterproofing agents are chloride metal waterproofing agents and metal soap waterproofing agents.

3. The strength is different.

There is no strength requirement for plastering mortar, and there is a strength grade requirement for masonry mortar.

In general, the wall of multi-storey buildings is made of M1-M10 masonry mortar; Masonry such as masonry foundations, inspection wells, and rainwater wells are often mined with M5 mortar; masonry mortar for industrial plants, substations, basements and other masonry; The following mortar is commonly used in buildings below the second floor; Simple bungalows and temporary buildings can choose lime mortar.

There are two kinds of hollow bricks, one is a hollow block made of cement as a cementitious material, and the other is a hollow brick made of clay or shale as a raw material by sintering. Dry mortar is feasible for masonry of both materials; If the product cannot meet the use requirements, the key problem lies in the design of the mix ratio of cement and sand and the use of additives. The masonry mortar used in folk houses is made of ordinary cement, lime and sand, which is not much viscous, but the strength is still good after curing.

As long as the construction level of the workers is good, there will be no major problems. Of course, the plastering mortar is different, if there is no viscosity, there will be a lot of floor ash, the waste is very large, the masonry mortar is used to paste the upper and lower layers of bricks, there are certain requirements for adhesion and water retention, slump, the cost is much higher than the ordinary plastering, the plastering mortar is actually cement mortar, the folk practice prefers to use lime paste in the plastering, but in the dry-mixed mortar, can not use lime calcium powder, one because of the high cost, in addition the lime calcium is unstable in the plastering mortar, There is a dry-mix mortar in order to reduce the cost, the amount of cement is very low, but also add some inorganic or organic thickening materials, the constructability is generally not a problem, the strength has different grades, the quality is not necessarily better than the effect of on-site mixing, folk practice for thousands of years, is the most reliable and feasible way, the cost advantage is also obvious, ordinary mortar is recommended to the landlord or pay attention to the city, the local promotion resistance is very large, there is no strong **, ordinary mortar has no way to live, for hollow brick masonry mortar, Efforts should be made on the anti-sagging properties of the mortar or the adhesion to the wall materials, mainly by means of additives. Comparatively speaking, masonry mortar is cheaper than plastering mortar.

The water absorption of the block is relatively high, so you should pay attention to it during construction.

Now the construction plastering mortar can be cement mortar or mixed mortar; The masonry mortar is generally made of cement mortar, with a strength of more than m5.

Plastering mortar can be cement mortar or mixed mortar, and the strength requirements are not high. Masonry mortar is required to have compressive strength, generally. Because of its different mortar mix ratio, it can be seen when observed with the naked eye.

Rub it with your hands, the sand is plastered, and the other way around, it is masonry. The one with more water content is masonry, and the less is plastered.

Add wheat mustard hair gray tendons or something in the mud, add an appropriate amount of cement to the mud or use cement powder on the surface layer, and it is best to fix a piece of nylon mesh or steel wire mesh before powder (building supplies, available in the market).

First. Build a 12 cm wall on the outside of the mud wall, and a 6 cm wall with a height of less than 3 meters, and then paint the exterior wall.

Second; Scrape off the mud on the mud wall, wet the wall and paint it twice with cement mortar.

Add steel bars, paste a layer of cement on both sides inside and outside, and it will definitely be strong.

You can only knock out the cement mortar and re-iron it, and the wall must be watered and maintained after the scalding.

Now you can use a hollow drum hammer to find all the hollow drums on the wall, knock them out, re-scald them, and water them for maintenance. After that, at least wait for the inside and outside of the wall to dry thoroughly before scraping putty and applying paint.

It's useless to maintain now, don't deal with it now, and wait for the wall to dry before applying putty powder.

The proportion of cement mortar and mixed mortar required for repairing the wall is as follows:

1: wall hook --- refers to imitation brick clear water wall, cultural stone, etc. 1: cement: sand 1: 1: raw slurry scraping and smoothing the joint.

Two: indoor general wall plastering 1: brick wall plastering:

1:3 lime plaster mortar 2: concrete, concrete masonry wall block plastering 1:

3:9 cement plaster mortar 3: aerated concrete slatted wall block plastering 1:

3:6 cement plaster mortar.

Extended Materials. Cement is a powdered hydraulic inorganic cementitious material. After adding water and stirring into a slurry, it can be hardened in air or better hardened in water, and can firmly cement sand, stone and other materials together. The mixture of early lime and volcanic ash is similar to modern lime pozzolana cement [1], which cements the crushed stone to make concrete, which is not only strong when hardened, but also resistant to the erosion of fresh water or salt water.

For a long time, as an important cementitious material, it has been widely used in civil construction, water conservancy, national defense and other projects.

Cement is divided into the following according to its use and performance:

1) General cement: cement usually used in general civil engineering and construction projects. General cement mainly refers to:

The six categories of cement specified in GB175-2007 are Portland cement, ordinary Portland cement, slag Portland cement, porosyl Portland cement, fly ash Portland cement and composite Portland cement.

2) Special cement: cement for special purposes. Such as: G-grade oil well cement, road Portland cement.

3) Characteristic cement: a certain cement with outstanding performance. Such as: fast-hardening Portland cement, low-heat slag Portland cement, expanded sulfoaluminate cement, phosphoaluminate cement and phosphate cement.