Classifications

• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B19/00—Other methods of shaping glass
  • C03B19/10—Forming beads
  • C03B19/108—Forming porous, sintered or foamed beads
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C11/00—Multi-cellular glass ; Porous or hollow glass or glass particles
  • C03C11/007—Foam glass, e.g. obtained by incorporating a blowing agent and heating
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
  • C04B14/02—Granular materials, e.g. microballoons
  • C04B14/04—Silica-rich materials; Silicates
  • C04B14/22—Glass ; Devitrified glass
  • C04B14/24—Glass ; Devitrified glass porous, e.g. foamed glass

Definitions

• the foam glass granules produced in this way had an inhomogeneous structure in that the size and distribution of the bubbles in the surface zone of the one grain were different than in the interior of the same. This led to a decrease in the compressive strength in the surface zone of the individual grain and thus to a decrease in the compressive strength as a whole.
• the object of the invention is to create a foam glass granulate with improved compressive strength with the same or less specific weight and to create a simple and inexpensive method for producing such a foam glass granulate.
• the foam glass granulate according to the invention is characterized in that it consists of fragments of a foam glass body and has at least 100,000, expediently at least 500,000 and preferably at least 1,000,000, bubbles of at least approximately the same size per cm of granulate mass.
• the granules can have flanged edges.
• the invention further relates to a process for producing the foam glass granules according to the invention, which is characterized in that the raw materials are ground to a flour, this is mixed with an organic and / or inorganic blowing agent which develops in the heat gas, the mixture in a flat bed oven inflates to a flat foam glass strand, cools it down after expansion and crushed it into granules immediately after cooling.
• the blowing agent is expediently applied to the glass grain surface as a uniform layer.
• the mixture of flour and blowing agent is expediently dried beforehand so gently that the water chemically bound in the blowing agent is not driven off.
• the strand of foam glass When it cools down sharply, the strand of foam glass practically disintegrates into granules as a result of the internal tensions, otherwise the crushing is preferably carried out by mechanical breaking.
• the foam glass strand is preferably produced on a circumferential, closed, caterpillar-shaped material carrier formed from steel strip or from individual links, which is enclosed in the upper strand by a flat bed furnace.
• the layer thickness of the glass strand to be expanded is expediently dimensioned such that, per unit area, its heat capacity is greater than that of the material carrier.
• the expanded foam glass strand is expediently cooled by cooling the material carrier.
• the outer surface of the material carrier is preferably provided with an aluminum oxide or iron-aluminum alloy layer.
• the granules obtained are mechanically processed, for example in a device operating in the manner of a coating drum, in such a way that the edges are broken.
• the process according to the invention gives extremely fine-pored, very light granules which can be used in particular as an additive for lightweight concrete and as a filler for plastics.
• it enables the production of a foam glass granulate which has up to 3,000,000 closed bubbles per cm 3 of granulate mass and, with a specific weight of 0.25, a compressive strength of more than 130 kg / cm 2 .
• the blowing agent thus obtained is admixed with 500 parts by weight of finely ground Galsmehl.
• the mixture is dried at 120 to 180 ° C and sieved if necessary using a sieve with a mesh size of 0.3 mm.
• the glass powder activated in this way is briefly expanded in a link belt either in this composition, or after emaciation by adding up to five times the amount of glass powder, in a layer thickness of 0.5 to 5 cm at 780 ° C.
• the emerging foam glass strand is quenched and crushed to the desired grain size.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Organic Chemistry (AREA)
• Materials Engineering (AREA)
• Ceramic Engineering (AREA)
• Civil Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Structural Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Glass Compositions (AREA)
• Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4381405

Family Applications (1)

Country Status (10)

Cited By (1)

Families Citing this family (21)

Citations (3)

Family Cites Families (7)

• 1978
  • 1978-11-30 CH CH1226578A patent/CH637606A5/de not_active IP Right Cessation
• 1979
  • 1979-11-26 ES ES486344A patent/ES486344A0/es active Granted
  • 1979-11-27 DE DE7979810166T patent/DE2967482D1/de not_active Expired
  • 1979-11-27 WO PCT/CH1979/000150 patent/WO1980001162A1/de not_active Ceased
  • 1979-11-27 AT AT79810166T patent/ATE14204T1/de not_active IP Right Cessation
  • 1979-11-27 US US06/200,506 patent/US4332908A/en not_active Expired - Lifetime
  • 1979-11-27 EP EP79810166A patent/EP0012114B1/de not_active Expired
  • 1979-11-27 JP JP50198479A patent/JPS55500940A/ja active Pending
  • 1979-11-29 CA CA000340912A patent/CA1138900A/en not_active Expired
• 1980
  • 1980-07-28 DK DK324980A patent/DK324980A/da not_active Application Discontinuation

Patent Citations (3)

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