Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Patent
1993-04-05
1994-07-19
Klemanski, Helene
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
106797, C04B 200, C04B 1442
Patent
active
053305736
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to a molding of calcium silicate having high strength useful for building materials.
2. Background Art
A molding of calcium silicate, which is obtained by hydrothermally synthesizing calcareous material and silicic material, has been widely used as building material having light weight, high strength, high heat resistance, incombustibility property. In recent years, such a molding of calcium silicate has been further improved, and there have been made various proposals to provide the molding of calcium silicate with working properties such as bulk specific gravity, strength, abating, cutting, polishing, screw-nail holding property, and an adhesive property.
However, in the actual state, it is not easy to obtain such a molding having the above-mentioned properties, and the manufacture of the building material, which is similar to the natural timber, has not been realized yet. Conventionally, a matrix of xonotlite, which is reinforced with glass fiber, is typically used as the above-mentioned type material. However, in such a material, since an adhesive strength between glass fiber and xonotlite is low, 5 to 10% by weight of synthetic resin is normally added thereto so as to enhance the adhesive strength. In fact, high adhesive strength to the glass fiber was obtained and its bending strength was satisfied. However, such a material was easily burned since a small amount of synthetic resin existed in the material. Also, heat resistance and incombustibility of such a material were low, and its workability was extremely low as compared with the timber.
DISCLOSURE OF THE INVENTION
According to the present invention, an object is to provide a molding of calcium silicate having high strength wherein glass fiber and pulp are dispersed and strongly adhered without including compounding synthetic resin in the composition, thereby obtaining an incombustible building material, which is similar to a natural timber.
More specifically, the present invention provides a molding of calcium silicate having high strength wherein tobermorite C--S--H (calcium silicate hydrate) and quartz are mixed, and 2 to 10% by weight of glass fiber and pulp are respectively contained as a reinforcing material, a Ti/Qi ratio is 0.1 to 1.0 and an absolute bulk density is 0.3 to 0.7 g/cc when said molding is powder X-ray diffracted wherein Ti and Qi show intensity of the X-ray diffraction of a tobermorite crystal (002) face and that of silica crystal (101) face, respectively. Moreover, there is provided a method for manufacturing a molding of calcium silicate having high strength which is formed of calcareous material, silicic material, and fiber as raw materials wherein the calcareous material and silicic material are added such that the CaO/SiO.sub.2 molar ratio is 0.6 to 0.9; silicic material is formed of crystalline silica and amorphous silica, the weight ratio of amorphous silica/(crystalline silica+amorphous silica), is 0.2 to 0.8 and fiber is formed of alkali proof glass fiber and pulp in an amount of 2 to 10% by weight. The method comprises the steps of mixing calcareous material with at least a part of the amorphous silica so as to obtain a slurry at 50.degree. C. or less; heating said slurry to 80.degree. C. or more to be gelled; uniformly mixing said obtained gelled material with resident material including alkali proof glass fiber; dehydrating the obtained mixture under pressure of 3 to 30 kgf/cm.sup. 2 whereby a molding is obtained; heating and reacting said obtained molding in an autoclave; and setting a Ti/Qi ratio to 0.1 to 1.0 when said obtained molding is powder X-ray diffracted wherein Ti and Qi show intensity of the x-ray diffraction of a tobermorite crystal (002) face and that of silica crystal (101) face, respectively.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an SEM (scanning electronic microscope) photograph showing a crystal structure of a molding of calcium silicate of Example 1 of the present invention;
FIG. 2 is a view explaining a method for testi
REFERENCES:
patent: 3679446 (1972-07-01), Kubo
patent: 3816149 (1974-06-01), Zettel
patent: 3895096 (1975-07-01), Helser et al.
patent: 3902913 (1975-09-01), Helser et al.
patent: 4298561 (1981-11-01), Uchida et al.
patent: 5240501 (1993-08-01), Popovic
Kaneko Katsuaki
Kuramoto Ryozo
Nakano Masayuki
Otozaki Shigeo
Shibasaki Hideo
Klemanski Helene
Onoda Cement Co. Ltd.
Sample David
LandOfFree
Molding of calcium silicate having high strength and its manufac does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Molding of calcium silicate having high strength and its manufac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molding of calcium silicate having high strength and its manufac will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-517287