A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hydrophobic expanded perlite and preparation method thereof
The invention provides hydrophobic expanded perlite and a method for preparing the hydrophobic expanded perlite. The method comprises the following steps: (1) grading perlite ore and screening perlite with its expanding multiple K0 being greater than 10; (2) screening the perlite after grading; (3) preheating for dehydration in a preheating furnace of 100-600 DEG C after screening; (4) carrying out secondary grading after preheating for dehydration, and screening expanded perlite which has expanding multiple K0 being greater than 20 and refractive index being less than 2 and has glassy luster or resinous luster, so as to obtain expanded perlite with its density being less than 80kg/m<3>; and (5) carrying out water repellent treatment on the expanded perlite so as to obtain the hydrophobic expanded perlite. The method provided by the invention is simple to operate and convenient to popularize. The hydrophobic expanded perlite prepared by the above method has a good hydrophobic effect, and 24-hour water absorption of the hydrophobic expanded perlite is controlled below 8.3%. The hydrophobic expanded perlite can better meet the high-performance requirement of existing building materials.
Hydrophobic expanded perlite and preparation method thereof
The invention provides hydrophobic expanded perlite and a method for preparing the hydrophobic expanded perlite. The method comprises the following steps: (1) grading perlite ore and screening perlite with its expanding multiple K0 being greater than 10; (2) screening the perlite after grading; (3) preheating for dehydration in a preheating furnace of 100-600 DEG C after screening; (4) carrying out secondary grading after preheating for dehydration, and screening expanded perlite which has expanding multiple K0 being greater than 20 and refractive index being less than 2 and has glassy luster or resinous luster, so as to obtain expanded perlite with its density being less than 80kg/m<3>; and (5) carrying out water repellent treatment on the expanded perlite so as to obtain the hydrophobic expanded perlite. The method provided by the invention is simple to operate and convenient to popularize. The hydrophobic expanded perlite prepared by the above method has a good hydrophobic effect, and 24-hour water absorption of the hydrophobic expanded perlite is controlled below 8.3%. The hydrophobic expanded perlite can better meet the high-performance requirement of existing building materials.
Hydrophobic expanded perlite and preparation method thereof
SHAO MINGSONG (author) / XIE SISONG (author) / WEI WEI (author)
2015-09-23
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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