First, there is chromatic aberration.
Reason:
1, putty powder itself is a semi-finished product, and the instability of raw materials is one of the main reasons for the color difference. Because the quality of mineral powder mined in mining areas will vary from region to region, if it is not carefully blended, different batches and color differences will appear.
2. Because the supplier uses the method of "filling in the blanks" to mix the low-grade raw materials for delivery, it is impossible to conduct spot checks one by one due to the large purchase volume, which leads to individual "fish escaping from the net" mixing in production and individual color difference.
3. Due to the mistakes of production personnel, the color difference caused by mixing different grades of raw materials or scraping different brands of products on the same wall.
Treatment method:
1 2, color difference is generally not a formula problem, so there is no quality problem. For example, the wall to be painted can generally be painted with a paint film, which will not affect the overall decoration effect. For example, the wall that has not been brushed for two or three times has color difference, so it is recommended to scrape it with colorless putty powder or brush it again.
3. All personnel involved in production and construction shall carry out production and construction in strict accordance with relevant standards to avoid man-made quality problems.
Note: If there is any color difference during construction, it should be fed back to the supplier in time. If there is any color difference during the first construction, it should be adjusted in time, and the same batch of products should be scraped to the last time.
2. Surface pulverization;
Reason:
1. construction reason: during the last lighting construction, the painter repeatedly scraped the wall surface with a scraper, resulting in slight peeling on the surface, which will form powdery symptoms after drying.
2. Man-made reasons: when the putty of the last construction was wet, the wall was exposed to external dust (cutting operation, strong wind, ground cleaning, etc. ), leading to false powdering.
3. Production reason: the production personnel accidentally put the wrong raw materials or the machinery and equipment leaked, resulting in unstable formula and powder removal.
Treatment method:
1. The construction master should pay attention to the surface humidity of putty when doing the last construction without painting or polishing. Too dry will cause peeling and powder removal. Just smooth the knife marks when lighting, and it is not advisable to dry them many times.
2. If there is the illusion that dust is attached to the wall, you should use feather bombs to remove the dust after the decoration is completed, or you can wipe it clean with clean water and clean cloth.
3. In case of quick drying and pulverization, the company's technicians should go to the site to identify whether it is caused by the product formula.
Note: if it is a product formula problem, the symptom should be that it is difficult to scrape dry in batches and dry quickly. After thorough drying, the putty layer is loose and easy to peel off and crack.
3. Moldy:
Reason:
1. For the wall curtain wall, the raw material used is the mixed mortar of sea sand and cement, which has high acidity and alkalinity, so the acid-alkali reaction occurs at the skirting line that is easy to be wet or where the wall leaks, resulting in long hair, mildew, empty shell and falling off.
Treatment method:
1. Wipe the moldy and empty shell wall, and then clean it with clear water. If there is water leakage or wet wall, put an end to the water source in time, and scrape the alkali-resistant putty powder again after the wall is dry.
Note: generally, moldy walls appear, which are basically in the weather with high temperature in spring. (commonly known as Shuinantian)
Step 4: Finish quickly.
Reason:
1. Due to the hot weather and high temperature in summer, the water evaporates quickly, which usually happens in the second construction.
2. Production reason: the quick-drying phenomenon caused by careless misplacement of raw material formula by production personnel or the unstable formula caused by abnormal machinery and equipment.
Treatment method:
1. During construction, the temperature should not be higher than 35℃, and putty powder scraped twice or more should not be scraped too thin or stirred too thinly.
2. If it is quick-drying, technicians should go to the site to identify whether it is caused by the product formula.
Note: In case of quick drying, it is suggested that the previous construction should be completed in about 2 hours, and the next construction should be carried out after the surface is dry, which can reduce quick drying.
Verb (abbreviation for verb) pinhole
Reason:
1. It is normal to have pinholes during the first batch scraping. Because the putty powder layer of the first scraping is thick, it is not suitable for smoothing, which will affect the adhesion of the second scraping. Second, there are usually some uneven places on the wall where pinholes appear. Because the uneven place eats a lot of food and dries slowly, it is difficult for the scraper to compact the putty powder layer in the concave place, which will produce some pinholes.
2. Due to the lack of light during construction, some small pinholes on the wall will be ignored by the construction workers during construction, and some pinholes are caused by not closing in time.
Treatment method:
1. The uneven wall surface should be leveled as much as possible during the first construction (because the tiny pinholes generated during the first construction will not affect the normal progress of the second construction), which will help to smooth the putty layer for the second and third times and reduce pinholes.
2. Attention should be paid to light during construction. In case of insufficient light in bad weather or the light turns from bright to dark at night, construction should be carried out with the help of lighting equipment to avoid man-made pinhole problems caused by construction mistakes.
Note: High viscosity or slow drying of putty powder will also produce some pinholes. Pay attention to the rationality of product formula.
Stratification of intransitive verbs
Reason:
1. Because the water-resistant putty powder produced by our company belongs to slow type, the hardness of this batch of products will increase with the extension of time, wet weather and the increase of moisture. During construction, the interval between the first batch and the last batch is long, and the last batch will be polished when it is finished. The outer layer is loose and easy to polish. When some places penetrate the previous one, it becomes hard, because the previous one has been left for a long time.
2. The last batch is scraped too fast and too smooth, and the time interval is too long, which will be affected by wet weather and water. The hardness of the external mask is different from that of the surface film. When polishing, the inner layer is loose and easy to wear, while the surface film has high hardness and is not easy to polish, which will cause delamination.
Treatment method:
1. After the preliminary construction is completed, due to other reasons, or due to wet weather, rainy season, water and other reasons, the time interval is longer; It is suggested that putty powder be scraped twice in the next construction to avoid delamination caused by bottom wear during grinding.
When scraping the last line, be careful not to press it too hard. The wall to be polished cannot be polished. Pinholes and knife marks on the surface can be smoothed. In case of wet weather (commonly known as rainy day) and rainy season, operations should be suspended until the weather improves. If wet weather and rain are encountered when scraping the last batch, it should be polished immediately the next day to avoid the phenomenon of polishing and delamination caused by water absorption and hardening of the wall paint film.
Note: 1, the wall surface after compaction and grinding is not suitable for grinding;
2, the rainy season or wet weather should stop working, especially in mountainous areas with changeable climatic conditions, should pay special attention to.
3. In general, waterproof putty powder should be polished within one week after construction.
Seven. Overcome difficulties
Reason:
1. It is difficult to polish the wall that is pressed too tightly or polished during construction, because it will increase the density of putty powder layer and increase the hardness of the firm surface of the wall.
2. The last batch of walls that have not been polished or contacted with water for a long time, such as (wet weather, rainy season, wall seepage, etc. ), it is difficult to polish, because the water-resistant putty powder produced by our company is a slow-drying product. The characteristic of the product is that the hardness will reach the best after one month, and the hardening effect will be accelerated when it meets water. In both cases, the hardness of the wall increases, so it is difficult to polish, and the polished wall is rough.
3. The putty powder with different formula types is mixed together, or the formula ratio is wrong, which makes the scraped product have higher hardness (for example, the putty powder is mixed in the interior and exterior walls, etc.). ).
Treatment method:
1, 2. If the extruded wall surface is too solid or the polished wall surface needs polishing, it should be roughly polished with 150# sandpaper before trimming with 400# sandpaper or scraping once or twice before polishing.
Eight. cutaneous allergy
Reason:
1, the product contains high alkalinity, because the water-resistant putty powder sold in the market at present basically contains cement base, which belongs to high alkalinity (a common problem of water-resistant putty powder). Individual construction workers will have skin irritation at the first contact, but not after frequent contact habits (such as those who have been exposed to cement and quicklime). ).
Treatment method:
1. Individuals can adapt to skin irritation after about three or four initial contacts. For example, if the skin is sensitive, it should be wiped with rapeseed oil or coated with Piyanping and aloe vera gel before cleaning. For people with sensitive skin, it is recommended to apply some rapeseed oil on bare skin before polishing to prevent skin allergy.
2. Buy low-alkali putty powder: it is recommended that the wall decoration should be polished and painted. When buying putty powder, choose low-alkali putty powder to avoid skin allergy. (For example, the paint putty produced by our company: Demeiwu -J type, U type, crack-resistant A type, A Qing Master-AQ880 #).
note:
1, when the weather is hot, you sweat a lot, and you should pay attention to protection when the capillaries are wide open.
2. If the product accidentally enters the eyes, please do not rub it with your hands, and immediately rinse it with clear water.
3. Indoor ventilation should be maintained during polishing, and protective articles such as masks and hats should be worn.
Nine. Cracks, cracks and dark spots
Reason:
1. Wall cracks are caused by external factors, such as the principle of temperature expansion and contraction, earthquake, foundation settlement and other external factors.
2. Due to the incorrect proportion of curtain wall mixed mortar, when the viscosity is high, the wall will shrink after drying, leading to cracking and cracking.
3. Cracking of putty powder will basically form tiny micro-cracks on the wall, such as chicken melon marks, turtle shell marks and other shapes.
Treatment method:
1, because the external force is uncontrollable and hard to prevent.
2, should wait for mixed mortar wall dry, before putty powder batch scraping construction.
3, such as putty powder cracking should be confirmed by the company's technical personnel to the scene according to the actual situation of the wall.
note:
1. Cracking of doors, windows and beams is normal.
2. The top floor of a building is easily affected by thermal expansion and contraction, resulting in cracks.
20 10 with the improvement of the quality and other properties of putty powder, these problems may be less.