Stock material or miscellaneous articles – Composite – Of silicon containing
Patent
1982-03-05
1985-05-07
Kittle, John E.
Stock material or miscellaneous articles
Composite
Of silicon containing
106 90, 106 98, 427201, 427202, 427204, 428689, 428703, C23F 1500
Patent
active
045158614
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to novel articles and methods based upon new discoveries of particularly surprising properties possessed by materials comprising special binder matrices disclosed in International patent application No. PCT/DK79/00047, further developments of the special binder matrices being disclosed in International patent application No. PCT/DK81/00048, the contents of the above-mentioned patent applications being incorporated herein by reference.
BACKGROUND AND DEFINITIONS
In the following specification and claims, the term "DSP matrix" designates any coherent binder matrix disclosed in the above-mentioned patent applications and comprising
(A) homogeneously arranged inorganic solid particles of a size of from about 50 .ANG. to about 0.5 .mu.m, or a coherent structure formed from such homogeneously arranged particles, and
(B) densely packed solid particles having a size of the order of 0.5-100 .mu.m and being at least one order of magnitude larger than the respective particles stated under (A), or a coherent structure formed from such densely packed particles,
the particles A or the coherent structure formed therefrom being homogeneously distributed in the void volume between the particles B,
the dense packing being substantially a packing corresponding to the one obtainable by gentle mechanical influence on a system of geometrically equally shaped large particles in which locking surface forces do not have any significant effect,
(C) compact-shaped solid particles of a material having a strength exceeding that of ordinary sand and stone used for ordinary concrete, typically a strength corresponding to at least one of the following criteria:
(1) a die pressure of above 30 MPa at a degree of packing of 0.70, above 50 MPa at a degree of packing of 0.75, and above 90 MPa at a degree of packing of 0.80, as assessed (on particles of the material having a size ratio between the largest and smallest particle substantially not exceeding 4) by the method described in International patent application No. PCT/DK81/00048,
(2) a compressive strength of a composite material with the particles embedded in a specified matrix exceeding 170 MPa (in case of a substantial amount of the particles being larger than 4 mm) and 200 MPa (in case of substantially all particles being smaller than 4 mm), as assessed by the method described in International patent application No. PCT/DK81/00048,
(3) a Moh's hardness (referring to the mineral constituting the particles) exceeding 7 and
(4) a Knoop indentor hardness (referring to the mineral constituting the particles) exceeding 800,
said particles having a size of 100 .mu.m-0.1 m,
(D) additional bodies which have at least one dimension which is at least one order of magnitude larger than the particles A.
The additional bodies termed "D" above are the same bodies as are designated "bodies C" in International patent application No. PCT/DK81/00048. They comprise a wide variety of bodies, including particles such as sand or stone and fibers such as, e.g., glass fibers, steel fibers, and plastics fibers. Particularly strong shaped articles comprising the DSP matrix are obtained when bodies C which have a strength exceeding that of ordinary sand and stone used for ordinary concrete are embedded in the matrix. Typical examples of bodies C are bodies consisting of one or more of the following components: Topaz, lawsonite, diamond, corundum, phenacite, spinel, beryl, chrysoberyl, tourmaline, granite, andalusite, staurolite, zircon, boron carbide, tungsten carbide; one interesting and economical material being refractory grade bauxite.
In the following specification and claims, the term "a material comprising the DSP matrix" designates any material having the new matrix as a binder matrix and optionally containing bodies C and D as defined above. As discussed in International patent application No. PCT/DK79/00047 and International patent application No. PCT/DK81/00048, the particles B will, according to important embodiments, comprise at least 20% of Portland cement particles
REFERENCES:
patent: 2890157 (1959-06-01), Raetzsch
patent: 3676541 (1972-07-01), Mishi et al.
patent: 4028125 (1977-06-01), Martin
patent: 4036659 (1977-07-01), Stude
patent: 4255241 (1981-03-01), Kroon et al.
patent: 4310486 (1982-01-01), Cornwell et al.
Aktieselskabet Aalborg Portland-Cement-Fabrik
Kittle John E.
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