Generally speaking, the sand with particle size less than 0.25mm is super fine sand, fine sand between 0.25-0.35mm, medium sand between 0.35-0.5mm, and coarse sand greater than 0.5mm.
4.
In the case of Hesha, it’s almost clean with one clap of both hands.
The thickness of the painting shall not exceed 35mm.
The 1m length of kitchen flashing is 1mm, and the 1m length of toilet floor flashing is 5mm.
The joint of new and old walls shall be painted with a “hanging net” with a width of 200mm and a diameter of 10mm * 10mm.
Process acceptance methods and standards 1.
The flatness of the brick surface shall not be greater than 3mm with a 2m long inspection ruler.
5.
The brick joints shall be uniform and moderate in size, and the joints shall be full and clear..
The first step is to build and paint the new wall.
b.
What grade of cement sand do we need? In fact, this is different, Normally, we will look at the cement grade.
Sometimes we have to rely on the experience of bricklayers to enter the site.
As for the mixing ratio, the bricklayer masters know that it will not be described in detail here.
Acceptance of floor tiles: A.
Trapezoid Rubber Magnetic Chamfer 
For coarse river sand, irregular screening is required, which is very time-consuming.
Its strength directly determines the size of the unit stress range.
d.
3.
The new and old walls shall be painted with 1:3 mortar.
If the original wall is masonry, the insertion of tie bars shall not be less than 200mm.
1、 Matters needing attention in the construction of new wall 1.
2、 Construction technology of new wall 1.
After all, the operation is not our own operation.
Yellow sand is generally divided into river sand and sea sand.
That is, the wall tiles are pasted from the opposite wall of the entrance, and the pressing direction of wall tiles and floor tiles is: wall tiles press floor tiles.
f.
If the original wall is a brick wall, the form of joint and rubbing shall be adopted, with five into one.
Generally, if it is difficult to pat off the sticky hand, it is basically sea sand.
When purchasing, you can select the strength and hardness of cement according to its label.
2、 River sand selection skills 1.
It is necessary to know that salt will have an impact on the quality of building structures and decorative materials, especially on metal materials, which will produce electrochemical corrosion and have certain corrosivity.
The “centipede foot” masonry method must be adopted at the top of the new wall.
After the completion of water and electricity, bricklayers or carpenters enter the site for construction.
River sand does not contain salt and has no corrosive effect on concrete and reinforcement.
Why only river sand? Because the sea sand still has chlorine, that is, it contains salt.
The connection between the new wall and the original wall shall be provided with tie measures, and the tie bar shall be 6-8500mm-600mm.
1:3 cement mortar is used for masonry; 2.
The sand we use for decoration is almost all river sand.
Before the bricklayer enters the site, the owner needs to send the ordered wall tiles and floor tiles to the decoration site.
It is recommended to purchase cement of regular brand, and local brand can be selected.
2.
c.
Wall tile acceptance: a.
④ Taste: the sea sand has a certain salty taste, while the river sand has only unfashionable taste.
Then, 325 and 424 are the most commonly used in our normal home decoration.
Knock the wall tiles with a special inspection hammer, and the hollowing rate of each wall tile must be within 3%.
d.
The arrangement of wall tiles shall not have more than one row of incomplete tiles, and the incomplete tiles shall be arranged at the secondary parts or internal corners.
1.
Therefore, be sure to check before use to avoid impurities.
③ look at the sticky degree: the sticky degree of sea sand is more sticky than that of river sand.
the pressing direction is correct, and the pressing joint cannot be seen from the direction of entering the door.
If there are mud, dead leaves and other things in the concrete, it will greatly increase the probability of hollowing and weak bonding.
knock the floor tiles with a special inspection hammer, and the hollowing rate of each floor tile shall not be higher than 3%.
2.
3.
In this way, the quality of river sand can be unified.
The newly built wall shall be overlapped with the concrete.
3.
Specification: if the river sand is of good quality during decoration, it is better to use the sand of this manufacturer for the whole project.
Drill holes in the concrete with an electric drill, fix it with an expansion bolt, and insert tie bars, The requirements are the same as the lapping standard of new wall and old wall.
The four corners of each two adjacent bricks shall be flat, and the height difference of the four corners shall not be greater than 1mm.
② Look at the particles: the sense of particles of river sand is coarser, indicating that the roughness is moderate and the content of impurities is less; In the case of sea sand, the grain feeling is finer, and even some sea sand can reach the powder form.
Before masonry, the bricks shall be wetted 1-2 hours in advance.
When using cement, it needs to be used up in time once it is opened, so as to prevent it from becoming damp and caking, resulting in waste.
Another point is that you don’t have to worry about the brand Hesha when you choose, which is too limited.
2.
Impurities: the less impurities, the better.
The bricklayer stage is also a dirty stage in the decoration process, because the bricklayer site needs to mix cement sand, and the regular decoration company will designate an area for workers to mix cement sand.
c.
The wall at the junction of the old and new walls must be provided with a “tie bar” with a total length of 500mm, 100mm into the old wall, driven at an angle of 45 degrees, and a 500mm high; 2.
The brick joints shall be uniform and moderate in size, and the joints shall be full and clear.
First, what is the cement grade? The cement grade is a sign of the strength and hardness of the cement.
b.
The new wall must be overlapped with the old wall.
At the same time, it is also the hardness of cement after setting and hardening after mixing.
The four corners of each two adjacent bricks shall be flat, and the height difference of the four corners shall not be greater than 1mm.
e.
The color of sea sand is very different from that of river sand.
If it exceeds the thickness, a reinforcing net must be used to avoid hollowing and falling off.
Particle size: for home decoration, neutral river sand is the best.
The color of sea sand is dark and dark brown; For river sand, the color is relatively yellow and bright.
If the original wall is concrete, it shall be drilled, welded or connected with expansion bolts.
Xihesha is not suitable for home decoration.
