Abstract: An aggregate is produced from waste glass which is initially crushed to a granular state and is thereafter roughened at its surfaces and rounded at its edges. This result is obtained by a grinding treatment. The aggregate can be used for concrete. It allows an excellent adhering of the cement and it gives practically no rise to the danger of injury during the handling thereof.

Abstract: A dry composition comprising an aluminous cement and a calcium sulphate, and preferably an accelerator and a water soluble fluoride may be reacted with water in a wide range of proportions to form a rapid setting material which develops high compressive strength.

Abstract: This invention relates to a method of producing enhanced strength portland cements. Under the process of this invention, certain portland cements, in particular those containing at least 4% C.sub.4 AF and up to 0.2% of a strength enhancing additive comprising triisopropanolamine, exhibit a marked increase in 7 and 28 day compressive strength. The triisopropanolamine strength enhancing additive may be admixed with cement powder or may be interground as a grinding aid with cement clinkder during finish milling.

Abstract: A dispersion consisting essentially of magnetic particles, a dialkylester of phthalic acid which functions as a dispersing medium, and optionally, a dispersing agent is particularly useful as a precursor to a composition suitable for casting onto a cellulose acid ester support film to form a transparent magnetic recording layer for use in photographic films. The dispersion provides magnetic recording layers exhibiting fewer particle agglomerations and reduced light scattering and photographic prints prepared from films containing such magnetic layers exhibit virtually no increase in graininess attributable to the magnetic recording layer.

Abstract: An abrasion-concealing agent for glass containers, which comprises (A) a polyorganosiloxane and (B) a volatile polydimethylsiloxane, a glass container in which abrasions on the surface thereof have been concealed by the abrasion-concealing agent, and a method for concealing abrasions on a glass container by using the abrasion-concealing agent. The abrasion-concealing agent has excellent abrasion-concealing properites, film strength, water resistance, safety, workability and resistance to an aqueous alkaline solution washing, and does not cause any damage to labels on glass containers in the coating process.

Abstract: A method of preparing an organosilazane including reacting a first halosilane having the formula RR.sup.1 SiX.sub.2, wherein X is F, Cl, Br, or I, and each R and R.sup.1, independently, is X, H, or a lower alkyl group; a first primary amine compound having the formula R.sup.2 NH.sub.2, wherein R.sup.2 is H or a lower alkyl group; and a second primary amine compound having the formula R.sup.3 NH.sub.2, wherein R.sup.3 is H or a lower alkyl group, R.sup.3 being different from R.sup.2, to form the organosilazane.

Abstract: Vanadium garnet material and a method for their preparation. The vanadium garnet material has a trivalent vanadium cation and a composition that falls within a specific polygon shaped area in a ternary composition diagram of V.sub.2 O.sub.3, CaO and SiO.sub.2. The polygon shaped area represents compositions of liquids with which said vanadium garnet is in equilibrium on the liquidus surface and from which the vanadium garnet phase is crystallized. A typical vanadium garnet material has the formula Ca.sub.3 V.sub.2 Si.sub.3 O.sub.12. The vanadium garnet materials may be used in laser applications.

Abstract: The present invention provides a method for improving the durability of cement-hydraulic substances, the method decreasing the dry shrinkage of cement-hydraulic-set substances such as concrete, mortar or related substances, and increasing resistance to a repetition of the freezing and thawing of the cement-hydraulic-set substances, by the use of terminal alkyletherified compounds or terminal alkylesterified compounds of polymers having --C.sub.2 H.sub.5 O-- and/or --C.sub.3 H.sub.6 O-- as a repetitive unit.

Abstract: A method for manufacturing silicon carbide whisker which has a cross-sectional diameter of greater than about 1 .mu.m by mixing a source of silicon atom in the form of grains having a mean grain diameter of at least 50 .mu.m with a carbon atom source in the presence of an element or compound of the element, the element being yttrium, calcium, manganese, aluminum, indium, or rare earth elements in an amount from about 100 to 2,000 ppm and growing the silicon carbide whisker therefrom.

Abstract: A refractory brick for use in rotary cement kilns has improved properties by the addition of small quantities of MnO.sub.2 to the composition used to form the brick.

Abstract: A C.sub.10 alcohol mixture for plasticizer, which comprises 2-propylheptanol (hereinafter referred to as "PRH"), an alcohol having a structure of condensation product of n-valeraldehyde and 2-methylbutyraldehyde (hereinafter referred to as "Component A"), an alcohol having a structure of condensation product of n-valeraldehyde and 3-methylbutyraldehyde (hereinafter referred to as "Component B"), an alcohol having a structure of condensation product of n-valeraldehyde and pivalaldehyde (hereinafter referred to as "Component C"), and other C.sub.10 alcohols (hereinafter referred to as "Component D"), characterized in that the respective components are present in the following molar ratios:Component A/PRH=0.04-1Component B/PHR=0.002-0.3Component C/PRH=0.001-0.3Component D/PRH.ltoreq.0.3.

Abstract: A process is disclosed for manufacturing water reducing plasticizing and hardening-retarding plasticizing additives for concrete, using sugarcane derivatives that modify the structural characterisitics of the concrete, resulting in improved plasticity and density and altering of the curing time.

Abstract: A cementing composition for forming a low density cement slurry comprising a hydraulic cement and shot coke.

Abstract: This invention relates to a new ceramic-metal composite body and a method for producing the same. Particularly, a compliant layer composition is utilized for preventing the rupture of a ceramic article and/or the yielding or failure of a metal during the pouring, solidification and cooling of a molten metal which has been cast around the ceramic. A slurry composition for the compliant layer includes plaster of paris, a liquid vehicle and a filler material. The slurry composition is coated on the ceramic article and thereafter is heat-treated to form a compliant layer. Ceramic-metal composite bodies comprising low strength hollow articles and high expansion coefficient metals may be manufactured according to the method of this invention.

Abstract: A gunnable plastic refractory is made by adding a hydrocolloid, for example a polysaccharide ether such as methylcellulose, to the refractory composition and adjusting the moisture content to be from about 4% to about 10%. The workability index of the refractory mix is from about 8% to about 30%. The refractory can be gunned without stoppages caused by clogging of hoses and the rebound rate is low.

Abstract: The present invention relates to a ferroelectric ceramic material which is a Perovskite solid solution comprising a solid solution represented by the formula:Pb.sub.1-a M.sub.a (Mg.sub.1/3 p0 Nb.sub.2/3).sub.x Ti.sub.y Zr.sub.z O.sub.3containing in the solution at least one oxide selected from the group A noted below and at least one oxide selected from the group B noted below.Group A : La.sub.2 O.sub.3 and Nd.sub.2 O.sub.3 ;Group B : ZnO, SnO.sub.2 and Ta.sub.2 O.sub.5.The proposed ferroelectric ceramic material has a large piezoelectric strain constant d. The present invention is further directed to ferroelectric ceramic which is a Perovskite solid solution comprising a solid solution represented by the formula:Pb.sub.1 -aM.sub.a (Mg.sub.1/3 Nb.sub.2/3).sub.x Ti.sub.y Zr.sub.z O.sub.3wherein M is Ba or Sr, x+y+z is 1, a is from 0 to 0.10, x is from 0.05 to 0.70, y is from 0.25 to 0.50 and z is from 0.05 to 0.

Abstract: A method of controlling the level of entrained air in hydraulic cement compositions is disclosed comprising the sequential steps of preparing a hydraulic cement composition in the form of an aqueous slurry containing an air entraining plasticizer and a defoamer, and increasing the air content of the composition by adding to said composition an air entraining agent. This method prevents undesired air entrainment, while allowing controlled amounts of air to be entrained if desired for freeze/thaw durability.

Abstract: Preceramic molding compositions capable of forming low density ceramics having acceptable strength and improved wear resistance are compositions having a particle size not larger than about 105 micrometers and comprising an intimate mixture of (A) about 50-90 parts by weight of powder ingredients comprising about 2-50% by weight of graphite powder and about 98-50% by weight of a second powder selected from silicon carbide, silicon nitride, and mixtures thereof and (B) correspondingly, about 50-10 parts by weight of a preceramic polysilazane binder.

Abstract: The present invention relates to a ferroelectric ceramic material which is a Perovskite solid said solution comprising a solid solution represented by the formulaPb.sub.1-a M.sub.a (Mg.sub.1/3 Nb.sub.2/3).sub.x Ti.sub.y Zr.sub.z O.sub.3containing in the solution at least one oxide selected from the group A noted below and at least one oxide selected from the group B noted below, with the proviso that NiO or Fe.sub.2 O.sub.3 is necessarily contained.Group A: La.sub.2 O.sub.3, Bi.sub.2 O.sub.3 and Nd.sub.2 O.sub.3 ;Group B: NiO, Fe.sub.2 O.sub.3, SnO.sub.2 and Ta.sub.2 O.sub.5.The proposed ferroelectric ceramic material has a large piezoelectric strain constant d. The present invention is further directed to a ferroelectric ceramic which is a Perovskite solid solution comprising a solid solution represented by the formulaPb.sub.1-a M.sub.a (Mg.sub.1/3 Nb.sub.2/3).sub.x Ti.sub.y Zr.sub.z O.sub.3wherein M is Ba or Sr, x+y+z is 1, a is from 0 to 0.10, x is from 0.05 to 0.70, y is from 0.25 to 0.50 and z is from 0.

Abstract: A particulate solid activator comprising a porous material containing absorbed ammonium phosphate can be prepared by a process which comprises: heating a slurry of the porous material and an ammonium phosphate solution; and then spray drying the slurry to obtain the particulate solid activator. The porous material can be diatomaceous earth. The resulting particulate solid activator can be dry blended with a magnesium-containing compound, e.g. MgO, and an optional aggregate to form a magnesium phosphate fast-setting cement mixture. This mixture reacts in the presence of an aqueous component at ambient temperature to form a monolithic solid.