Zhongkai teaches you to recognize the nature of glass beads of-Industry News-Perlite-Xinyang city centertriumph insulation material Co.,Ltd.

Zhongkai teaches you to recognize the nature of glass beads of

Time：2012-12-2 17:44:03 Source：本站原创 Hits：【字体：大中小】

Recently, ZhongKai after adequate market research found that 80% of customers do not understand the difference between the glass beads and perlite, 10% of the customers to understand some basic differences, 10% of customers fully understand perlite vitrified micro The difference between the beads. , Kay company in order to allow customers to buy their own products, first detailed in this article for you to explain the nature of the glass beads of the next chapter for you to explain in detail the nature of perlite.
Glass beads is an acidic the glassy lava minerals (perlite ore) type environment-friendly inorganic light insulation material formed special technical processing and production processing internal porous surface of the glass enclosed, small diameter spherical body particles, in addition to the excellent performance with light weight, thermal insulation, thermal insulation, fire does not burn, high strength, low water absorption, easy and good, and the advantages of long life, a new high-performance inorganic light The heat-insulating material. Its main chemical composition is Si02, AI203, CaO, the particle diameter of 0.1 to 2 mm, the bulk density of 50 to 100kg/m3, the thermal conductivity of 0.028 to 0.048W / m. K, the floating rate is greater than 95%, into a ball vitrification rate is greater than 95%, the water absorption is less than 50%, a melting temperature of 1200 ° C. Silk painting position irregular spherical particles, the internal porous cavity structure, the glassy surface of the closure, shiny and smooth, very stable physical and chemical properties. Alternative because of its many fine features of fly ash floating beads, glass beads, expanded perlite, polystyrene particles, and many other traditional lightweight aggregate in different products can be widely used in industry, agriculture, building materials, chemical , smelting, light industry and many other fields.
    Now, the glass beads are widely used in the production wall insulation materials dry mixed mortar, and achieved good economic and social benefits.
    1, the generation of glass beads and their characteristics
    The glassy surface of the formation of particle strength, glass beads of the physical and chemical properties are very stable, weathering resistance, aging resistance and excellent thermal insulation, fire protection, acoustic performance, it is suitable for use in many fields of light filled aggregate and thermal insulation, fireproofing, sound-absorbing insulation materials. In the building materials industry, glass beads as lightweight aggregate, can improve the workability of mortar fluidity and self-resistance strength, reduce shrinkage of the wood properties, improve product performance, and reduce overall production costs. Lightweight dry-mixed mortar (insulation, masonry, wiping face) applications, lightweight aggregate for insulation mortar dry mix with glass beads instead of the traditional ordinary expanded perlite and polystyrene particles overcome the expansion pearl large rock absorbent, easy to powder in the slurry mixing in volume shrinkage, could easily lead to the low intensity of the product late, and hollowing cracking phenomenon, at the same time to make up the organic material is flammable, the fire performance of polystyrene particles, high temperature cause harmful gas and anti-aging weather resistance, rebound in construction defects and improve the comprehensive performance improved insulation mortar and construction performance.
    The main role of the 2 glass beads
    Glass beads of lightweight insulating aggregate of one-component insulation dry mix mortar, confirmed by a large number of engineering applications not only in the wall insulation requirements in line with national building energy efficiency standards, and one-component type insulation dry mixed mortar to ensure the stability of the product quality, to overcome the two-component or multi-component insulation mortar quality site with instability.
    Second, high bond strength, early strength is significantly better than the lightweight aggregate to the polyphenylene teeth point ordinary perlite insulation mortar, shorten the secondary plastering time, improve the efficiency of construction.
    Again, good water retention and crack resistance, on the walls of the various substrates do not need watering or interface handling dry can be directly put on the wall, not hollowing, cracking, greatly improving the efficiency of construction and overall performance, and reduce the cost of the project. Especially in the hot summer and cold in winter and hot in summer and warm winter zone will produce excellent social and economic benefits.
    In short, the insulation dry-mixed mortar in the field of building energy efficiency in China has a great market area and development prospects. Using glass beads instead of fly ash floating bead in the refractory industry, the production of lightweight refractory insulation bricks and shaped casting material in the chemical industry, glass beads as dense regulator substitute perlite in the smelting industry other aspects are achieved good social and economic benefits.
    3 glass bead insulation insulation system
    The glass beads of insulation mortar are glass beads of adhesive (cement, gypsum, etc.) as well as a variety of additives in the factory optimum ratio, after uniform special mixing equipment by mixing the dry powder bulk material. Vitrified microsphere thermal insulation is an inorganic insulation material with excellent thermal insulation properties and fire resistance, aging resistance, and can be widely used in wall insulation works of old and new buildings, and effectively improve the indoor thermal environment, applied in the exterior wall on high strength, is not hollowing cracking, and is very easy to operate and the site construction mixing with water can be used, and may be applied directly in the stem-like wall, the construction of good performance. Overcome the water absorption of expanded perlite lightweight aggregate performance, easy chalking large construction volume shrinkage, could easily lead to the product late low intensity and hollowing cracking, reduce the insulation properties of the phenomenon; while up polyphenylene particulate organic material is flammable, fire is bad, high temperatures produces harmful gases and aging resistance, weather resistance, low and poor workability rebound in construction and large defects, greatly improving the overall performance and the performance of construction of the dry powder insulation mortar.
    3.1 characteristics of glass beads
    The lightweight aggregate glass beads is an inorganic the glassy mineral materials by volcanic rock crushed into ore, after the special puffed burning method processed, irregular spherical particles, the internal cavity structure, glassy surface closed stable physical and chemical properties, with light, heat and fire, high temperature resistance, anti-aging, small water absorption, excellent features. Alternative fly ash Cenosphere, glass Zeeospheres ordinary expanded perlite, polystyrene particles and many other lightweight aggregate applications in different products, is an environmentally friendly high-performance inorganic light insulation material Suo glass beads of The physical properties are shown in Table l.
    Table 1 glass beads of the physical properties of
The quantitative unit performance of the test project
Particle size mm 0.5-1.5
Capacity weight Kg/m3 80-130
Thermal conductivity W / m. k 0.032-0.045
Floating rate% ≥ 98
Surface vitrification rate% ≥ 95
Water absorption (vacuum filtration method)% 20 ~ 50
38 to 46% of the volume loss rate of 1 MPa pressure
Refractoriness ℃ 1280 ~ 1360
Using temperature ℃ 80
    Vitrified microsphere thermal insulation performance of glass beads of gradation at all levels of glass beads of particle size distribution of the particles. The glass beads gradation performance and strength of the insulation mortar work has an impact. A good particle size distribution, with a small amount of cement, less water consumption formulated liquidity, good water retention mortar mixes, dense and uniform mortar and molding conditions.
    Performing insulation Mortar, consider a different severity of the impact of the different particle size distribution of the glass beads of mortar performance, fiber cement substrate interaction and air-entraining agent dosage Mortar, and use normalized orthogonal table of selected factors, orthogonal experimental design, reasonable arrangements for the test [8], successfully developed a new type of insulation mortar. The developed glass microsphere thermal insulation properties, such as shown in Table 2.
The quantitative units performance requirements of the test project
Dry density Kg/m3 ≤ 300
Wet density Kg/m3 ≤ 680
Compressive strength kPa ≥ 300
Tensile strength kPa ≥ 150
Bond strength kPa ≥ 100
Thermal conductivity W / m • k ≤ 0.06
Linear shrinkage% ≤ 0.3
Softening coefficient% ≥ 0.6
Combustion performance - A Grade
Radioactivity (number of radionuclide specific activity) internal exposure index (IRa) cover set (IY)
                   ≥ 1.0 ≤ 1.3
Setting time initial setting time / h final setting time / h
≤ 1.0 ≤ 2.0
                  Table 2 vitrified microsphere thermal insulation performance
    3.2 vitrified microsphere thermal insulation system design
    Glass beads of insulation the mortar wall insulation system interface mortar bonding layer, glass bead insulation mortar insulation layer, cracking mortar alkali mesh reinforced thin finishing layer and the paint finishes layers (see Figure 1) .
    Within the insulation mortar outside wall of glass beads, preference should be given the external thermal insulation system, the design of the exterior insulation. When the average wall heat transfer coefficient can not meet the limit requirements, should use internal and external composite thermal insulation. Vitrified microsphere thermal insulation of external wall insulation system structure design, should be based on the building shape coefficient, window type, primary wall, the application of thermal calculation principle, law, and meet the standard requirements of the national energy-saving 65% by thermal OK, and to consider vitrified microsphere thermal insulation quality and safety, ease of construction operations. Vitrified microsphere thermal insulation as a coated insulation system should take into account the structural requirements of the smear insulation system, should be well sealed and waterproof structure design, the key positions should Detailing. For some special requirements on the thermal insulation of buildings, such as cold storage, etc., when the outside wiping glass beads of insulation mortar 100mm unable to meet the requirements should be added to the glass bead insulation mortar insulation layer.
    The heat transfer coefficient of the external walls of a numerical calculation of the average heat transfer coefficient, heat transfer coefficient calculated that the area-weighted method, must consider the impact of the building envelope surrounding concrete beams, columns, shear walls, thermal bridges.
    Exterior insulation and finish systems necessary to set the anti-cracking sub-lattice seam. Sub-lattice seam should be set by floor level of crack resistance; vertical crack resistance sub-lattice seam should be set by the area of the wall plate buildings should not be greater than 30m, depending on the particular circumstances in the tower building, should stay in the shade angle parts. Glass bead insulation mortar sided insulation layer design thickness should not be greater than 100mm. Cracking mortar design thickness should wipe the surface layer is 4 ~ 6ram.
    Primary surface temperature should be higher than 0 ° C to ensure that the grass-roots level and interface mortar from freezing and thawing damage. Parts of water in a horizontal or inclined sills, parapets, balconies, awnings may additional the surface waterproof layer.
    3.3 vitrified microsphere thermal insulation system
    3.3.1 Process Flow
    Glass bead insulation mortar site operation process of hanging vertical: primary wall cleanup → sets of side bomb plastering thickness control lines → → brushing interface mortar do ash cake, red bars → wiping glass bead insulation mortar → projectile points grid, open division slot → → insulation layer acceptance wipe cracking mortar pressed into alkali-resistant mesh.
    3.3.2 Operating conditions
    In order to ensure the quality of the project and the works of construction to lay the foundation. The grassroots processing should comply with the relevant standards of the country or region. The surface should surface floating dust, grease, isolation and corner debris clean up projections greater than 10mm should be excluded leveled. Exterior wall surface of the door window frames, rainwater pipes card, embedded iron equipment through walls, pipes, etc. in advance installed and set aside to go out to the thickness of the insulation layer, at the gap should be required to impaction.
    Thicker insulation material slow drying, dry rubbed surface layer of insulation layer will cause the tensile properties of glass bead insulation mortar insulation system, poor performance of the freeze-thaw resistance, so when the construction of low ambient temperature 5 ℃, winter construction measures should be taken to site. Summer should avoid sun exposure. Non-rain, more snow, and five wind its construction.
3.3.3 material preparation and construction requirements
    Preparation of a variety of materials to note when the material is non-polluting, in order not to affect the accuracy of the mixing ratio; preparation should also be noted that the order of addition of the material, and construction should be strictly adhered to, and should not be reversed.
    Preparation of mortar interface interface agents: in fine sand (dry): cement = 1:1:1 (mass ratio), to join the interface agent, then add in the fine sand and cement, Stir into a paste.
    Preparation of glass beads of insulation mortar slurry with water: dry powder = from 0.85 to 1.1:1:1 (mass ratio), first adding water mixing container, and then into the mixing glass bead insulation mortar dry powder container, and stirred for 3 ~ 5min, the slurry into a homogeneous paste body, can be used. The slurry must be with the distribution with the preparation of a good slurry to be spent in 1h and shall recover the floor material and then adding water.

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