Lightweight substance molded body, method for the production and use thereof
First Claim
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1. A molded body from a lightweight substance formed from a lightweight aggregate and a sintering auxiliary, comprising:
- a sintered product obtained by mixing a lightweight substance of 80 to 93 wt % of a lightweight aggregate, selected from the group consisting of expanded glass, scrap glass, and their mixtures with 20 to 7 wt % of an aqueous alkali silicate solution, where the lightweight aggregate is bonded in a network structure exclusively at the contact sites to obtain its essential properties, wherein the molded body has a dry bulk density and that dry bulk density lies in the range from 150 to 750 kg/m3.
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Abstract
The invention relates to a lightweight substance molded body made of a lightweight aggregate and a sintering auxiliary agent, wherein said molded body consist of a sintering product containing 60-95 wt. % lightweight aggregate with 40-5 wt. % water-soluble alkali silicate.
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Citations
17 Claims
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1. A molded body from a lightweight substance formed from a lightweight aggregate and a sintering auxiliary, comprising:
a sintered product obtained by mixing a lightweight substance of 80 to 93 wt % of a lightweight aggregate, selected from the group consisting of expanded glass, scrap glass, and their mixtures with 20 to 7 wt % of an aqueous alkali silicate solution, where the lightweight aggregate is bonded in a network structure exclusively at the contact sites to obtain its essential properties, wherein the molded body has a dry bulk density and that dry bulk density lies in the range from 150 to 750 kg/m3. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A process for the production of a molded body from a lightweight substance formed from a lightweight aggregate and a sintering auxiliary, the process comprising the steps of:
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obtaining a sintered product by mixing a lightweight substance of 80 to 93 wt % of a lightweight aggregate selected form the group consisting of expanded glass, scrap glass, and their mixtures with 20 to 7 wt % of an aqueous alkali silicate solution, where the lightweight aggregate is bonded in a network structure exclusively at the contact sites to obtain its essential properties, wherein the molded body has a dry bulk density and that dry bulk density lies in the range from 150 to 750 kg/m3. - View Dependent Claims (13, 14, 15, 16, 17)
subjecting the lightweight aggregate and the aqueous alkali silicate solution to a shaping process after mixing and sintering at 400°
C. to 1000°
C. over a period from 0.1 h to 5 h.
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14. Process according to claim 13, wherein the molded body has a compressive strength in the range from 0.1 to 15 N/mm3 and at least one of the dry bulk density and the compressive strength is adjusted as a function of the lightweight aggregate and the process parameters during sintering.
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15. Process according to claim 13 further comprising the step of drying at 50°
- C. to 95°
C. after shaping and before sintering.
- C. to 95°
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16. Process according to claim 13 wherein the sintering process is conducted at 550 to 850°
- C.
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17. Process according to claim 13 wherein sintering occurs during a period from 0.1 h to 0.5 h.
Specification