Construction plan National Chinese core journal T-expanded vitrified micro-bead inorganic thermal insulation mortar Liu Xueyu (Shanghai Yingshuo Polymer Materials Co., Ltd., Shanghai 201112) hollow drum cracking and other phenomena; make up for EPS (XPS) insulation board poor fire performance, high temperature Insufficient production of harmful gases and low aging resistance. Its thermal insulation performance is better than rubber powder polystyrene granule thermal insulation mortar, the material is stable, the high temperature resistance is good, and it can make up for the defects such as flammability and poor waterproof performance of polyphenyl granule organic materials. This paper introduces the characteristics, construction process and construction points of the expanded vitrified microbead inorganic thermal insulation mortar system, and briefly describes common technical problems and solutions. With the enhancement of human environmental awareness and sustainable development awareness, energy conservation has become a long-term strategic task in economic construction. Reforming traditional walls and improving their insulation performance are important measures to reduce the energy consumption of heating buildings in China. The expanded vitrified microbead inorganic thermal insulation mortar insulation system is formed by using the expanded vitrified microbead, a new building energy-saving thermal insulation material composite cracking mortar, which has low thermal conductivity, strong crack resistance, non-toxicity, no pollution, fire prevention and cost. The external thermal insulation system with low characteristics, aging resistance and simple construction has obvious advancement and superiority in terms of functions and construction methods. 1 System features Expanded vitrified micro-bead inorganic thermal insulation mortar insulation system is based on expanded vitrified micro-bead inorganic thermal insulation mortar as insulation layer, coated with a layer of anti-cracking mortar with waterproof, impermeability and crack resistance, and insulation layer The composite forms a complete system with thermal insulation, crack resistance, fire resistance and impermeability. The expanded vitrified microbead thermal insulation mortar is different from the traditional other thermal insulation materials, and overcomes the phenomenon that the expanded perlite mortar has large water absorption, easy to be powdered, and has a large volume shrinkage during stirring, which is easy to cause low strength and empty drum cracking in the later stage of the product. Make up for the poor fire resistance of EPS (XPS) insulation board, low temperature generation of harmful gases and low aging resistance, easy to be etched by insect ants, and use anchor nails directly on the original base wall during installation, and the damaged wall is easy to form. The water seepage point and the adhesion are difficult to be dense. Its compressive strength is better than that of rubber powder polystyrene granule insulation mortar, which can make up for the shortcomings of polyphenylene granule organic materials such as flammability, poor waterproof performance and large rebound in construction. The system is suitable for the construction of energy-saving 50% and 65% targets for the construction, expansion and renovation of existing and external buildings. The interior and exterior insulation and partition walls, basements, garages, stairs, corridors, fire exits, The thermal bridge can be insulated and insulated separately. It can also be used as the leveling fireproof layer of EPS and XPS, fire isolation, etc. The applicable building height is generally less than 100m. The thermal insulation slurry and the base wall form an external wall insulation system and are combined with other insulation materials. There are two types of wall insulation systems; the base layer can be various masonry walls or reinforced concrete walls; the exterior wall finish can be painted or tiled. The performance comparison of different types of insulation products on the market is shown in Table 1. 2 Process principle The expanded vitrified microbead insulation mortar is optimized in the factory by expanding vitrified beads, binder (cement, gypsum, etc.) and modified admixtures. A dry mix mortar that is uniformly mixed by a special mixing device. The lightweight aggregate expanded vitrified microbeads are formed by crushing, sieving, and high-temperature instantaneous calcination after mining, and about 98% of the capillary pores on the surface are closed by SiO2. The main chemical components are SiO2, Al2O3, CaO, etc. It has excellent properties such as light weight, low thermal conductivity, fire resistance, high and low temperature resistance, and stable physical and chemical properties. Expanded vitrified micro-bead inorganic thermal insulation mortar wall insulation system consists of interface mortar bonding layer, vitrified micro-bead insulation mortar insulation layer, crack-resistant mortar, alkali-resistant glass fiber mesh cloth reinforced thin surface layer and paint finish layer In the case of tile facing, the anti-crack mortar composite steel mesh can also be used instead of the alkali-resistant glass fiber mesh cloth, and the anchor bolt is used to strengthen the connection. Construction Process Table 1 Performance Comparison of Different Types of Insulation Products Project Expanded Vitrified Beads Insulation Mortar Rubber Powder Polystyrene Particle Insulation Paste EPS (XPS) Insulation Board Material Properties Features Dry-mixed mortar synthesized by inorganic materials such as vitrified beads Anti-aging, high temperature resistance, insect bite prevention, no harmful volatile gases, green environmental protection, easy construction. It consists of rubber powder and polystyrene particles. The polystyrene particles have a volume ratio of not less than 80%. It is not easy to mix evenly. It is easy to deform and loose when exposed to high temperature of 35弋. Extrusion of synthetic insulation board with foamed polystyrene as the main raw material requires special adhesive and anchor to install the wall. Thermal conductivity / 0.070-0.085 矣 0.060 矣 0.041 Combustion performance Class A, non-combustible material Bi grade, Flame Retardant material B2 grade, flammable material weatherability / year 502525 construction operability and thickness one-component dry powder packaging, 1:1 water mixing After evenly coating the wall directly, the design thickness is 20-50mm. The rubber powder and polystyrene particles are packaged in separate bags. The rubber powder should be mixed with water and then mixed with polystyrene particles. The volume ratio of polyphenyl particles is not less than 80%. The thickness does not exceed 100mm and requires professional construction. It needs to be glued to the wall with special adhesive, and it needs to be reinforced with anchor nails. The thickness is 30-60mm, which requires professional construction. 3 Construction process (see) 4 Construction points 4.1 Interface treatment The base wall should be cleaned, no oil stains, floating dust, etc. The wall surface should be loose and the weathered part should be cleaned. When the wall surface is more than 5mm, it should be repaired. The quality of the foundation wall and the door and window openings shall be qualified and accepted, and the door and window frame or auxiliary frame shall be installed and the thickness of the insulation shall be reserved. Downpipes, fire ladders, entry lines, air-conditioning port embedded parts, connectors, etc. are installed and reserved for insulation thickness. During the construction period and within 24 hours after completion, when the temperature of the grassroots and ambient air is less than 5 feet, effective measures should be taken to ensure the quality of the project; the summer construction should avoid sunlight exposure; the construction above the windy and rainy days is not allowed. 4.2 Hang vertical, sleeve, elastic control line, do gray cake, blasting with theodolite or large line hanging vertical, check the verticality of the wall, check the flatness (within 4mm) with 2m ruler and wedge feeler, Vertical alignment lines are placed at the corners of the building's exterior walls (yang angle, negative angle) and other necessary places. Horizontal lines are placed at appropriate positions on each floor to control the verticality and flatness of the insulation layer. According to the vertical degree of the external wall and the large angle, the thickness of the insulation layer should be determined (the design thickness should be guaranteed), the vertical, the square to find the rule, the elastic thickness control line, the vertical and horizontal lines, the square mouth, and the inorganic thermal insulation mortar The slurry is made of standard thickness gray cake and ribs. 4.3 Brushing interface mortar According to the interface agent: water = 4:1 mass ratio to prepare the interface mortar, evenly stir with a mixer for 3min, should be used within 2h after mixing, timeout can not continue to use. One day before the interface mortar construction, the wall surface is moistened with clean water, and the treated wall is fully coated with a uniform paste-like interface mortar according to the instructions. The interface mortar is evenly coated and wet with a roller or a trowel, and no scratching is required. And do the brushing treatment, the hair should not be too thick, 1~2mm is appropriate. With good materials, pay attention to sun protection and shelter. The amount of preparation should be used up within the operating time. After the interface mortar is applied for 1~15min, the thermal insulation mortar construction can be carried out. The application of the inorganic thermal insulation mortar must be carried out while the bristles are not dried. Rainy, windy, and humid weather avoid construction. 4.4 Spreading the vitrified micro-beads inorganic thermal insulation mortar according to the dry powder: water = 1:1.1 mass ratio to prepare inorganic thermal insulation mortar slurry, first add water to the mixing container, then put the vitrified micro-bead dry powder into the mixing container Stir for 5 min to make the slurry uniform. The inorganic thermal insulation mortar slurry shall be applied in at least 2 times. The thickness of the first construction shall not exceed 15 mm. The trowel shall be flattened to make the inorganic thermal insulation mortar evenly cover the wall surface. After the first construction for 24 hours, when the surface of the slurry is dry and there is a certain strength (the hand is lightly pressed), the second construction is carried out. The thickness of the subsequent construction should be thinner than the previous one. If the construction interval is too long or the surface is too Dry, watering should be wet before the next construction. When the thickness of the construction reaches the thickness of the gray cake, the large bar is used for flattening, and the allowable deviation of the flatness is 4 mm. The construction of the inorganic thermal insulation mortar is completed, the maintenance is about 7 days, the strength is checked, and then the next process is carried out. 4.5 Set the grid lines according to the facade of the building. In addition to the expansion joints, structural settlement joints and anti-seismic joints of the base structure wall, the divisional joints shall be provided with a division joint for each unidirectional length greater than 15m. According to the design requirements, the position of the ruled line and the drip tank is popped up on the inorganic thermal insulation mortar layer, and the groove is opened along the fine grid line with the wallpaper knife. (3) Embed the crack-resistant mortar in the groove, insert the plastic dividing strip and the drip sink into the groove, and firmly bond with the crack-resistant mortar, and smooth the mouth with the crack-resistant mortar. After the crack-resistant mortar is finally set, the impurities in the groove are cleaned in time. Decorative partitions with a width of more than 5 cm shall be constructed by on-site molding. That is, the slot is opened on the insulation layer, the size is 10mm wider than the design requirement, and the depth is 5mm. The grid is overlapped by the mesh cloth, and the upper mesh cloth is pressed along the grid cloth. The width is the width of the division. 4.6 Apply anti-cracking mortar According to the mass ratio of anti-cracking mortar and powder: water=4:1, prepare anti-cracking mortar, stir evenly for 3~5min with mixer, stir it up within 2h, and stop using it over time. Construction of paint finishes. When the mesh cloth is set in the crack-resistant protective layer of the paint exterior finish system, the mesh cloth should be pre-cut, and the length should be 3m, and the overlap width should be considered. Evenly wipe the 2~3mm thick crack-resistant mortar on the surface of the insulation layer, and immediately press the cut mesh into the crack-resistant mortar with the trowel. The mesh overlap width should not be less than 100mm, and the mesh should not be made empty. Drums, curled edges, wrinkles. The two-way corners of the grids on both sides of the yin and yang corners overlap each other, and the width of the laps on each side should not be less than 200mm. The grid cloth is laid from top to bottom, the fullness of the crack-resistant mortar reaches 100%, and the thickness of the crack-resistant layer is preferably 3. ~5mm. Face brick facing protective layer construction. When the steel wire mesh is set in the crack-resistant protective layer of the exterior wall insulation system, the wire mesh should be pre-cut, and the length should be 3m. The overlap width should be considered. Uniformly apply 3~4mm thick anti-cracking mortar on the surface of the insulation layer. After drying, the galvanized steel mesh can be laid. The overlapping width of the steel mesh should meet the requirements of 60mm in the horizontal direction and 40mm in the longitudinal direction. on. The setting of plastic anchor bolts shall be no less than 4 per square meter of wall surface, the wall height shall be 20m or more, and one per 10m, the depth of description shall not be less than 25mm. 4.7 Local treatment (1) laying double-layer alkali-resistant mesh cloth on the first layer The first layer is covered with a reinforced mesh cloth, the reinforced mesh cloth is connected, and then the second layer of the standard mesh cloth is laid. The crack resistance mortar between the two layers of mesh cloth must be full. It is also possible to use 2 layers of standard mesh cloth. The standard mesh cloth has a lap width of not less than 100mm. (2) Use a reinforced mesh cloth or a 2-layer standard mesh in the protective layer of the male and female corners. Cloth; when the corner is made of standard mesh cloth, it should be staggered and lapped, and the width of the lap joint is not less than 200mm. (3) The first corner of the wall is equipped with a special metal corner. The corner should be sandwiched between 2 layers of alkali. Between grids. A 300mm x 400mm alkali-resistant mesh cloth should be added around the door and window opening in advance in the direction of 45°. The outer corner of the outer corner of the corner (including the door and window opening), the horizontal distance of the anchor point from the corner is set to 100~150mm, and the upper and lower spacing should be no more than 500mm. 4.8 Inorganic thermal insulation mortar is used for the inner wall insulation base wall without cement mortar leveling Floor. The thickness of the insulation layer should not be large. When the inorganic insulation mortar system is used for the residential building wall and the interior wall with insulation requirements, it can be painted on one side of the wall or painted on both sides. If the tile is pasted, the construction method of crack-resistant mortar and alkali-resistant glass fiber mesh should be adopted. (3) The construction method is the same as the external insulation of the external wall. 5 Common problems and solutions 5.1 Analysis of the cause of empty drum, cracking and water seepage phenomenon: In the process of construction of expanded vitrified microbead insulation glue, due to the insufficient adhesion of the material or the thickness of the one-time batch coating, Partial separation between the insulation layer and the base layer. Cracking phenomenon: Expanded perlite is added to the expanded vitrified microbead insulation glue, which causes the strength of the insulation layer to be too low, and the difference in strength from the surface layer is too large. After the construction of the thermal insulation project is completed, cracking occurs on the surface. Water seepage phenomenon: Expanded perlite is added to the expanded vitrified microbead insulation glue, and the water absorption rate of the formed thermal insulation glue is too high. When the surface cracking or waterproof structure design is unreasonable, the leakage phenomenon caused by rainwater infiltration. 5.2 Solution Since the surface of the expanded vitrified microbeads is a closed-cell structure, the obtained thermal insulation mortar has high strength and low water absorption rate, and the expanded perlite is not subjected to vitrification treatment, and the surface is a flocculent open-cell structure. The thermal insulation glue has low strength and high water absorption rate, so the use of expanded vitrified microbeads can improve the strength of the thermal insulation glue and overcome or reduce the water seepage phenomenon of the outer wall. In the construction process, strictly follow the construction process, the thickness of each construction shall not exceed 10mm. After the completion of the previous process, the construction of the next process may be carried out, which can effectively avoid or reduce the phenomenon of hollowing and cracking. 6 Conclusion Expanded vitrified microbead inorganic thermal insulation mortar system fireproof, non-combustible, safe, green and environmentally friendly, high intensity, stable thermal insulation performance, simple construction and easy test of different test methods for thin layer thermal insulation coatings The results are compared with the results of several thermal conductivity test methods. See Table 4. Indirect Test Method Direct Test Method Hot Line Thermal Conductivity / As can be seen from Table 4, the relative errors of the indirect test method and the direct test method and the hot line test result are respectively The error is 3% and 2%, and the test results are very consistent. The indirect test method overcomes the defects of long direct sample preparation period and uneven thickness of the test plate produced. In the indirect test method, the thickness of the attached coating on the surface of the main material is very thin, and the preparation process is simple. It takes only 1 or 2 times to obtain the desired coating thickness, and the thickness uniformity of the coating is also easy. control. At the same time, this test method is also more realistic. Thin-layer thermal insulation coatings are also attached to the surface of other thermal insulation materials in practical applications, and the coating thickness is also very thin. Related studies have also shown that the thermal insulation coating film thickness is generally 1.5mm, the best thermal insulation effect, no significant change in the thermal insulation effect beyond this thickness. Combined with the test results of other methods, it can be seen that the indirect test method has less deviation and can truly reflect the thermal conductivity of the thermal insulation coating. Therefore, it is feasible to measure the thermal conductivity of thin-layer thermal insulation coatings by indirect testing. However, the indirect method is obtained by neat and intimate contact between the two materials. In practical applications, it may float due to the unevenness of the contact, which brings certain errors to the test results. 3 Evaluation of uncertainty of thermal conductivity measurement of thin-layer thermal insulation coatings The sources of uncertainty and assessment methods considered in this evaluation are shown in Table 5. Table 5 Uncertainty sources and assessment methods Project content assessment method Responsiveness of sensitivity coefficient uncertainty Reproducibility of the thermal conductivity test for reproducibility of the uA (A) reproducibility of the sample thickness test DC power DC potential difference meter test error introduced uncertainty temperature test error of the hot plate temperature sensor introduced uncertainty temperature cold plate temperature sensor The uncertainty introduced by the test error extends the uncertainty: when the confidence probability is 95%, the report contains the factor kc=2 measurement uncertainty: the thermal conductivity of the thin layer thermal insulation coating is (0.084±4 conclusion indirect test method) The thermal conductivity of the thin-layer thermal insulation coating is simple, the preparation method is short, the thickness of the coating is uniform, and there are no defects such as surface cracks. The verification test proves that the indirect test method has accurate test results and is complicated for heat-insulating coatings and other samples. The thermal conductivity of the thermal insulation material is determined by a new approach. The measurement of the thermal conductivity of the thin-layer thermal insulation coating by the steady-state protection double-plate method is not correct. The result of the calibration is (Finish)
Methyl Tin Mercaptide stabilizer ProStab - T181
Substitute equivalent to American TM-181-FS
Methyl Tin Stabilizer is an efficient stabilizer used in PVC hot working process. Its stability, transparency, compatibility and weather resistance are all superior to other organotin heat stabilizers. It is widely used in PVC sheet, panel, tubing and blow molding and injection molding products. It can also be used in food packaging, medicine packaging and non-toxic and harmless PVC products. Overseas, PVC products of various foods, medicine packaging and storage, and container and tubing for supplying drinking water with high requirements have all employed methyl tin as stabilizer. Its products boast pure color and luster, less odor vanishing fast and reliable safety performance. With the same effect, the using amount of methyl tin is reduced by 15-20% than that of other similar organotin stabilizers. Our company`s products have passed the ROHS certification.
One pack Lead Stabilizer are mainly used for the processing and producing of all kinds of pvc products.It is irregular flake or granular dust-free which is produced by metal compound stabilizer with the amount of chelating agent,lubricants and other internal and external components with the company's unique processing technology.The product contains the right amount of complex antioxidant system and other functional polymer additive,which can significantly increase finish product's performance and improve the surface luster.
Calcium Zinc Stabilizer are mainly used for all kinds of PVC products. It is produced by Calcium ,Zinc Organic stabilizer with the amount of chelating agent,lubricants and other internal and external components with the company's unique processing technology.The product contains the right amount of complex antioxidant system and other functional polymer additive,which can significantly increase finished goods' performance and improve the surface luster.
PVC Stabilizer PVC Stabilizer, Tin Stabilizer, One Pack Lead Stabilizer, Non-Toxic Ca Zn Stabilizer Shandong Novista Chemicals Co.,Ltd (Novista Group) , https://www.novistachem.com
