JPS61500491A - Boria modified alkali resistant glass - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

? Rear modified alkali resistant glass The present invention relates to alkali-resistant glass. While it generally pertains to vitreous bodies, it is specific to glasses that can be fibrillated. have a strong relationship. Background technology Natural mineral zeolite is a hydrated alkali and/or alkali with an open three-dimensional crystal structure. A large number of different mineral zeolites are known, which are a group of alkali earth aluminosilicates. and has been described in the literature, while lle! (11) minerals, immediately Chikabutsuite, Rhyofluorite, Kleinoteilozeolite, Erionite, 7 Errierite, Shinfutsu stone, turbidite 1 mordenite, soda zeolite, volcanic zeolite and wairakite are minerals Comprises the main group of zeolites. The chemical and physical properties of these major mineral zeolites and many of the major The properties of mineral zeolite are based on the industrial properties of Le-fond (collection m). Industrial Mine-rals and Roc ks) (M4 edition, 1975), pp. 1x235-1274; Zeolite molecular sieve (Zeolite molecular sieve) (1974), especially Chapter 3; and Mumpton (1974), especially Chapter 3; It is widely described in the natural zeolite minerals of t on ) Cd collection). these Publications also discuss the geological existence of natural mineral zeolites and the proposed There are several industrial and agricultural uses in which natural mineral zeolites are currently used on the market. It describes the use of. Natural mineral zeolite is a compound that has been widely described in many recent papers and It is important to recognize that this is a completely different class of material from synthetic zeolites. Ru. Because there is no generally established system for naming synthetic zeolites, Synthetic zeolites are made of synthetic zeolites with possible structural similarities to natural mineral zeolites. Some reports in the literature and patents show an X@diffraction A turn that suggests The notice describes a class of synthetic zeolites that consist of "synthetic" versions of natural mineral zeolites. . Thus, for example, synthetic zeolites of the type 1. However, the above-mentioned BreCk This method is technically incorrect and 2 types

[2] merely led to confusion between otherwise different classes of materials, namely natural mineral zeolites and synthetic zeolites. While it has been noted that there are structural similarities between the two groups, natural mineral zeolites represent a class of materials that is very heterogeneous and distinct from synthetic zeolites in structure and properties. Glass is a vitreous substance composed mostly of silica. However, the Since silica is a very difficult material to process, a significant amount of powder ash, lime or other fluxing agent is added to the silica to enable the glass-formed material to melt at the appropriate temperature. Minor amounts of other substances, usually elemental substances or oxides, are usually added to the finished glass to provide special properties such as color or chemical resistance. Las melt cold pressure L can be seen. 2 inotairozeolite and glass mixture fsooec Much lower than the melting point of either substance h) and +'! f′, a, porous low density glass There have been 10 reported cases of rawhide using what is described as a gas composition; See page 197. Alkali resistance is provided in Pilkinton's B glass, a type of glass consisting of a glass containing substantial amounts of crufnia and/or titania. These are refractory substances that increase the melting point of such glasses, although they increase the alkali resistance of the body. Tania tends to add cost to the glass as these are much more expensive materials than silica, soda, calcia and soda lime, which are the usual ingredients for silica glass. Although calcia tends to lower the melting point of the glass composition, the use of calcium oxide in soda-lime-silica glass with greater than about 15 percent by weight (15%) of the glass body is difficult to use in pressure glass technology. There are general warnings. DISCLOSURE OF THE INVENTION OBJECTS OF THE INVENTION To produce alkali-resistant glasses from modified naturally occurring zeolite materials. This is the object of the present invention. Another object of the invention is to use readily available boron, aluminum and aluminium. It is the modification of naturally occurring zeolite materials using alkaline earth metal compounds. Another object of the present invention is to form glass bodies from modified naturally occurring zeolites at relatively low temperatures. Another object of the invention is to provide improved properties, particularly fiberizing ability and/or alkali resistance. The present invention aims at forming a glass composition having good processability and moldability. glass compositions with high quality and outstanding resistance to alkaline environments. Ru. Such glass compositions have a low melia (1) oria) content, a relatively high special due to its lucia content, relatively low silica content and moderate alumina content. be marked. In one preferred embodiment, these glass compositions are derived from naturally occurring zemarite, and are supplemented with a boron-containing material and at least one alkaline earth whole-stock compound, a calcium compound, or a calcium compound. Ma Gnesium compounds are added and low silica. High alkaline earth metal oxide, calcia at 41 iF, resulting in a glass composite containing 2 ria. Aluminum or aluminum compounds may be added to the glass forming materials. Glass bodies, particularly fibers, formed from the glass compositions described above are encompassed within the scope of the present invention, which include Melia modified glass bodies containing relatively high amounts of l-branched or higher alkaline earth oxides, Regarding alkali-resistant glass and especially dahlia, silica glass containing calcium, alumina, calcia and a combination of calcia and magnesia. A particularly useful alkali-resistant glass has the following composition: Nijiliquor from about 30% to about 60% by weight, alumina from about 2% to about 20% by weight. Calcia - about 20% by weight to about 60% by weight, magnesia - about 0% by weight to about 30% by weight (however, calcia plus magnesia content ψ is about 20% by weight to about 60% by weight) and +JA approx. o, i heavy storage ~ approx. 6 weight section. In one preferred embodiment, the present invention relates to glasses formed from naturally occurring zeolites, and it is common practice to include such zeolites in glass-forming mixtures. The primary glass forming agent, particularly silica, is present in at least a significant amount and is often present in such mixtures. Such glasses may be used together with one or more naturally occurring zeolites, 1,3 p ria-forming substances and alkaline earth metal substances, especially calcium compounds such as those found in the form of limestone or dolomite. Importantly, as will be discussed below, they can be easily and inexpensively formed by melting calcium and magnesium compounds. However, glasses with excellent resistance to alkaline corrosion are made of silica, soda ash, alumina forming substances, stone Such glasses can be formed by starting with conventional materials such as scheelite and (or andromite and dahlia-type expropriate materials). Melia is generally present in higher amounts than alumina, so low meria and moderate alumina It can be described as a calcium acid glass. Alkali-resistant pouring glass assemblies aS can be easily formed by mixing calcium carbonate with naturally occurring zeolite materials. Many naturally occurring zeo Light materials can be formed into glass under appropriate conditions. glass forming material and Naturally occurring zeolites have many advantages. Naturally occurring enzymes Olite has already undergone a reaction and the various elements are intimately mixed with each other. and is responding. Zeolite materials also have a very low sulfur content. It is especially useful because it is plentiful. A very useful glass body is a zeolite glass body with a composition range of Light is combined with a large amount of laria and calcia or a combination of calcia and magnesia. Can be formed by combining: silica - from about 60 to about 85%, alumina - from about 6 to about 30 cents, Fe203, with expressed percentages being 1-rt/ξ-cents. - about 0.1 chill about 3%, calcia about θ% to about 15 degrees, magnesia - about 0% to about 5%, Posassia - about 1 inch to about 2%, soda about 1% to about 2 degrees . In particular, a small amount of melia-forming material mixed with a zeolite of the above composition and about 20 g The addition of calcium carbonate from about 20% to about 50% by weight gives good processability and formability and bullion after melting of the crushed material. This yields a glass with excellent resistance to IJe boundaries. By the way, these monsters The lath advantageously melts at a temperature of about 1250C to about 1000 ms with selected compositions melting below 1350C. Also, similar weight ξ-centage doloma Glasses formed by t-mixing between 40% and about 80% by weight of dolomite (based on the weight of zeolite present) with zeolite and melia-forming material can be formed by adding calcium carbonate. Comparable to well-formed glass produces a glass with properties that Although carbonates are the preferred reactants, alkaline Using other weirs or compounds of potash earth metals, especially calcium and magnesium can be done. In using a zeolite having a relatively low alumina content, e.g., about 10% to about 15% less alumina content than the weight of the zeolite material, additional alumina-forming material is added to the glass-forming mixture. Contains In addition, it is preferable to increase the fiberization ability of the resulting glass. The glass-forming composition is made by combining finely ground boron-containing material and limestone with the above composition. It can be easily made by mixing with finely ground zeolite material such as A zeolite material is a crystalline material with which it has been reacted, e.g. Since it is aluminum calcium, boron-containing materials such as borax, boronite, and stone Reacts easily and effectively with calcium carbonate in graystone to produce a small amount of Melia and a relatively high amount of calcium carbonate. A glass composition having a high calcia content is formed. Boron-containing materials, especially in combination with the presence of moderate alumina content, appear to provide improved cachet and formability and particularly increase the fiberizing ability of the glass. Upon cooling, the dahlia-containing glass material has strength and other qualities qualitatively comparable to typical silicate fiberglass and is about 10 times stronger than typical soda lime silicate window glass. Good physical properties with resistance to alkaline solutions 20 times better Show quality. Also, the resistance to alkaline substances is about 20% by weight in glass. It tends to increase as the calcia content increases from about 50% by weight. Then, if the content of calcia is higher than that, it tends to decrease slightly. - Rear-type expropriation materials and preferably addition of alumina-forming materials and alkaline earth metal components to form a glass with eroded fs fibrillation ability without loss of alkali resistance. This results in the formation of gas. In addition to improving the fiberizing strength and durability of the glass, glasses containing low dahlia and moderate to relatively low cal-7a content have other advantages as well. Calcia and The addition of magnesia and/or alumina to the composition of the zeolite There is a tendency to homogenize the diversity of Zeolite is a naturally occurring substance. are not homogeneous or uniform in their composition. Zeolites contain a relatively substantive amount of water, i.e. they are hydrated materials. Ru. Aquarium crystalline materials generally tend to melt at low mlf. Therefore Gala Rather than starting the silica-forming operation with silica, it is further advantageous to start the entire operation with caulked zeolite. The melting temperature of the Dahlia-modified alumina alkaline earth Kinjo silicate field glass of the present invention ranges from about 1,250c to about 15,000c, which makes it possible to pass through a platinum die 'PV' and spread the fibers with a force of 2. Especially within the range of about 300℃ to about 300℃. For example, such glass fibers can be used at temperatures of about 100°C to about 1350°C. I can do that. Glass fibers can also be shaped by spinning or other techniques. Wear. However, the formation of continuous strands is difficult to achieve with platinum or platinum-rhodium metals. #)i& is also well achieved by passing through a rifice and stretching. As described herein. )? The special advantages of IJ modified glasses are their excellent processability and fiber-forming properties, their resistance to crystallization and a wide temperature range of fiber-forming temperatures. Uniform viscosity throughout. The fibers of the glass composition of the present invention are characterized by the fact that they are highly alkaline in nature and dusty objects, e.g. It is particularly useful as it can be used to strengthen cement and plaster, for example. Such fibers can also be used to reinforce various types of organic matrices. However, reinforcing cement with such fibers offers particular advantages since asbestos has hitherto been extensively used for that purpose. The use of asbestos is being phased out due to various health and/or environmental concerns. Continuous strands or mats of glass fibers with the glass compositions described herein effectively strengthen concrete bodies. EXAMPLE A glass-forming material is pulverized into a fine powder, mixed with five specific additives as identified in the following table (expressed in cents by weight) and melted to form a glass body. and fibers were formed. The bath melting is carried out in a small melt 11 with a latch at a temperature of about 1250C to about 15000C depending on the composition and the amount of additives. Table Composition and properties of alkali-resistant glass Type Amount % Glass 7m Glass lb Glass composition Rica 500 47.5 475 Alumina to, o io, o ts,. Zeria 0.0 25 25 Calcia 35.0 35.0 30.0 Magnesia 5.0 5.0 5.0 Melting temperature C1450140014QQ Alkali resistance (5% NaOH, 1 ire loss test @7z hours, @90℃) ( 1,91,11,5 Fiberization ability Poor Mild Good Good - Working range C103080 The glasses listed in Table 1 include silica, alumina, calcium carbonate, boria and charcoal. No zeolite material was present in the latte. These glasses were prepared using traditional glass molds to investigate fiber-forming, alkali resistance and other properties of the resulting glasses. The glass LC showed very good properties: its melting point was reasonably low, while its alkali resistance was very good. The fibers were formed without difficulty. Composition and properties of zeolite glass fiber Zeolite 50.Q 55.0 60.Q, υ203 λ5 25 25 R20,2,52525 CaCO340,037,532-5 k32-5k1.0 2.5 2.5 S i02 46. 6 49.9 532λ120.11,3 11.8 1 23B203 3.3 32 31 Fe 203 0.5 0.5 n, 6CaO30,027,523,4 ?,!gcl 3.4 1.8 1.8 to 20 2.6 2.8 2!11 Na 20 2.4 2.5 2.7 Solubility 8 impregnation C1350140+) 1400 resistance (5% NaOH, heavy [11,51, 439 Fiberization ability Fairly good Good Good Good processing range (C) 30 50 70 Glasses La and Hb showed excellent alkali resistance; however, fiberization ability and and processing range were not within preferred parameters. Although Glass 50 has low alkali resistance, Glasses 1[a and [b] also show an improved processing range. e Zeolite 5 0,0 50.0 5 (1,051,055,0 Alumina 2.5 3.0 5 .0 5.0 5.0 Boronite 5.0 5.0 5.0 5.0 5 .0 Limestone 32,5 30,0 30.0 29.0 25. OF'o Mai) 10.0 to, o Ll tn, o to,. 5i02 465 46.7 461 463 49.3k1205 11.3 11,8 14,2 15. o f4.8B, 2032.8 2.7 2.7 3.2 2.7Fe 203n, 5 n, 5 o, s 0.5 ('1.50 aO3 ('1,9 28,7 27,6 27 .5 245Mg0 3.1 3 .0 2..6 2.6 3.0K20 2.6 25 2.5 2.6 2.7Na 20 2.4 2.3 2.3 2.4 2.5 Melting temperature C13001 350135013501400 Alkali resistance 22 18 2.0 2.2 26 (5%NaOH1 weight loss)!!2 Fibrinization capacity CC) approx. 10 (Xl approx. 1150 approx. 1200 approx. 1200 approx. 1200 Processing range ('C) 20 50 70 Glasses LD and Ie showed excellent fiberizing ability and processing temperature range, although their alkali resistance was slightly lower than glasses!A-LC. Glass fibers formed from glasses Ib, llc and ld are excellent reinforcing materials for concrete. The fiber content in the concrete and concrete increases the strength of the concrete IJ-t without significant deterioration of the fibers. Throughout this example, the glasses identified in Tables u and 1 are zeolites having the following composition. Made from: 5i02 828 weight fjK% human 1203 8.4 weight 1% F, e203 (1,3 weight range Cao 0.9 weight% MgOO, 6 weight range 20 2.9 weight% Na2O4, 1 weight t% Small changes during yield may occur in the zeolite/lattice punch.Very small amounts of other elements in such naturally occurring zeolites, such as boron, manganese, zirconium, titanium. ,/nadium, antimony, and/a lium are combined. The amount that can be present in combined form must be less than or equal to that amount, usually less than 0.01% by weight. It is often present in children with low weight. various other substances, especially gold Substances with genus elements may be found in trace amounts in zeolitic materials. The glass fibers in the above example are made of naturally occurring zeolite that has been modified with calcium carbonate (however, the modification includes various additions of aluminum components, boron components, alkaline earth metal components, and zirconium components via a lifting platform). ) formed from molten gas Bushing at about 1200℃ from the lath? Platinum butt with R degree It was continuously stretched by passing it through a thin film. The Top F glass composition has excellent alkali resistance, while being fiber-forming and has excellent mechanical properties such as tensile strength comparable to commercially available glass pressures. this Their modified zeolite glass is relatively low in iron content and has a desirable brightness. It has a dark green color. In forming the alkali-resistant Dahlia-containing glasses of the present invention, if one starts with a zeolite material, it is preferred to have such zeolite material present at least about 35% by weight of the glass patch mixture.9 If the zeolite is ? If the zeolite is to provide substantially all the ingredients for the glass to be mixed with the glass patch, then zeolite may be added to the glass patch in an amount of 40% to 50% by weight or more. It may also be used in compounds. The glass patch mixture contains significant amounts of dahlia-forming ingredients such as quartzite, boronite, boronite, ulexite, etc. Moderate naturally occurring borosilicate materials or borosilicate or boroaluminosilicate glass cullet can of course be used to provide the boron content in the glass rim. The boron content is approximately 6% by weight. Usually present in glass in an amount of about 6% by weight, preferably from about 1Nk to about 5% by weight of the resulting glass And special 1,7 < is about 1% by weight to about 4 times the weight of the light 3'? Sufficient T: is present to provide rear-containing tension. The present QJi is particularly concerned with the production of alkali-resistant fiberglass from non-J Laspatch containing substantial amounts of zeolite material and from zeolites containing additionally a boron component. Light substance and power 1. Although certain of the unique glass compositions disclosed herein may be formulated from zeolite-free glass-zeolite mixtures, certain of the unique glass compositions disclosed herein may be formulated from zeolite-free glasses. Such glass compositions have unique properties including fringing ability and alkali resistance. One such glass cup, expressed as one cent by weight to the least significant number, is: 5i02 45-55! '-120512-20 Fe203+FeO(1,0 CaO20-35 Mg0 0-10 The preferred composition, expressed as a weight percent with the smallest random number, is as follows; 8i02 46-54 people 1205 12-16 Fe20s"FeO<1 ..CaO22-35 One particularly preferred composition contains about 26-36 wt.% calcia (with the exception of about 26-34 wt.% CaO+MgO).Particularly useful compositions contain about 26-36 wt.% calcia. Expressed as cents to the least significant number, it has the following oxide content: Fe2O3 + FeO < 1.0 0aO25-30 Excellent fiberizing ability is a property of all the glasses described in the immediately preceding composition. However, the alkali resistance of such glasses varies with the Melia I' present. Glasses with lower &+J7y generally have better alkali resistance. Therefore, in glasses with lower calcia content. yl? The ria content should be low to maintain good alkali resistance. Glass containing about 30% calcia has up to about 6% calcia. Although glass containing about 22 weight percent calcia should contain less than about 2 weight percent melia to exhibit good alkali resistance. (Good alkali resistance for the purposes of the present invention is obtained by gating in 5 g NaOH at 90C for 72 hours. loss of less than about 3.3% by weight of Laszan Sol) in the compositions listed above. Small amounts of luconia and titania may be present, for example up to about 2% by weight. Jomo self-assembly is, of course, a modified zeolite without loss of all its remarkable properties. Can be formed from light. Industrial Applicability Remarkable resistance to alkaline environments makes these glasses particularly suitable for fiber or flame in the form of alkaline concrete, plaster, and other inorganic matrices. Let it play the role as an excellent reinforcing material for the camphorax. This means that asbestos, which was a standard filler as a reinforcing material in cement and concrete bodies, are considered undesirable due to the health hazards that may exist in very important. Glass fibers formed from the glasses of the present invention can be used in cementitious bodies, such as cement and It has particular utility as a reinforcing material for concrete and concrete. Cementitious bodies are characterized in that such bodies contain a small amount of glass fibers, preferably glass as described herein. from about 1% to about 10% by weight, and more preferably about 1% by weight. It exhibits increased strength when reinforced with about 7.5% by weight. Fibers are contained in cementitious bodies in sufficient quantities to increase the strength of such objects. It will be done. The glasses of the invention have excellent resistance to moisture degradation and Does not deteriorate or deteriorate during stored storage. The low sulfate content of naturally occurring zeolites makes them useful as components in glass-forming processes. important in their use. The sulfate group meets the glass melting conditions, and the diacid tends to produce sulfur oxides and other undesirable sulfur compounds. Environmental concerns arise from any raw materials containing sulfate groups, sulfites and other sulfur compounds, and from glass manufacturing methods. It is highly recommended for use in The present invention has a relatively high content of calcia. 4,41JA-containing glass However, at least one of the other alkaline earth metal oxides is used instead of calcia. Minor substitutions may also be made. For example, magnesium compounds, especially magnesium carbonate, are soluble in alkali-resistant glass. It may be substituted for at least some of the calcium carbonate in the production of Nototsuchi for melting. Similarly, barium and strontium compounds as well as barium, a naturally occurring substance often found in the same geographic region as zeolites, It may be replaced with a lithium compound. Oxides of alkaline earth metal elements include elements with valences greater than 3, such as silicon and boron. phosphorus, which can form three-dimensional networks with their oxides, i.e. silica, oxides of boron, and various ammonium oxides of phosphorus. It cannot be considered as a base agent. Divalent alkaline earth metal elements are present in glass. and are more tightly bound together than alkali metal elements. The sources of alkaline earth metals for forming oxides in the glasses of the invention are: Alkaline earth metal compounds Source Calcium carbonate Limestone Magnesium carbonate Dolomite Magnesium silicate Serpentine carbonate/charium precious stone Strontium Carbonate Strontianite Aluminum Beryllium Silicate Beryl The sources of calcium carbonate and magnesium carbonate are generally lithium and strontium. It is much more abundant and cheaper than sources of ammonium or beryllium compounds. Also, compared to acids bound within the glass, IJ-17um metal is considered to be caustic, although IJ-IJium is not harmful. Aluminum is alumina, e.g. aluminum from aluminosilicate glass current Silicates as silicates can be included in glass punches as naturally occurring materials such as various clays including kaolin, montmorillonite, and the like. Zirconia may optionally be present in the fiberglass m-sole of the present invention. Small amounts of zirconia can be obtained by melting the glass/glass mixture in a zirconia-containing crucible. and may be found in some compositions. Zirconium-containing components are also present in the form of zircon, various zirconium silicates, and zirconia-containing calendars. Can be added as a list. The boron modified zeolite-derived glass of the present invention has remarkable alkali resistance! (In addition, it is noteworthy that they have good processability and strength. These glasses can be used in any form 1, e.g. containers, sheets, fibers, etc. and especially those that do not need to be transparent or colorless.) It can be used for any purpose. Glass can be organic or inorganic flakes, foams (microscopic) to strengthen concrete, especially cement, plaster, etc. It can be used as small balls], fibers, etc. The properties of the glasses of the invention are particularly adapted to the formation of alkali-resistant glass fibers. international search report

Claims (22)

[Claims] 1. Substantial amount of naturally occurring pre-reacted zeolite material and glass form Glass-forming mixtures containing small amounts of boron compounds capable of forming boria under formation conditions. 2. About 30-60% by weight silica, about 2-20% by weight alumina, about 20-60% by weight % calcia, about 0-30% magnesia and about 0.1-6% botanicals by weight. Calcia plus magnesia content is approximately 20 to 60% by weight. Alkali-resistant glass composition. 3. Naturally occurring zeolite substances, aluminum components, alkaline earth metal components and melting the boron component. How to form glass. 4. Pre-reacted zeolite is combined with silica, alumina and carbon under glass forming conditions. Contains substantial amounts of silicon, aluminum and calcium components that can form lucia A mixture according to claim 1. 5. Claim wherein the zeolite provides a substantial portion of the siliceous material in the mixture. Mixtures of range 1. 6. of claim 1, wherein the zeolite is present as at least about 35% by weight of said mixture. Mixtures of Range 1. 7. Boron-containing components capable of forming boria under glass-forming conditions account for approximately 10% by weight of the mixture. 2. The mixture of claim 1, wherein the mixture is present in the mixture in an amount up to . 8. Aluminum and calcia can form alumina and calcia under glass forming conditions. A mixture according to claim 1, wherein a significant amount of a sium component is added to the mixture. 9. The composition SiO2 - about 45% to about 55% by weight, Al2O3 - about 12% to about 20% by weight % by weight, FeO + Fe2O3 - less than about 1.0% by weight, CaO - from about 20% by weight about 35% by weight, MgO - about 0% to about 10% by weight, K2O - about 0% to about 5% by weight, Na2O - about 0% to about 5% by weight, B2O5 - about 0.1% to about 6% by weight, with the exception of about 2% CaO+MgO 3. The glass composition of claim 2, wherein the glass composition is from 0% to about 40% by weight. 10. The composition SiO2 - about 46% to about 54% by weight, Al2O3 - about 12% to about 16% by weight wt%, FeO + Fe2O3 - less than about 1.0 wt%, CaO - about 22 wt% ~ about 35% by weight, MgO - about 0% to about 4% by weight, K2O - about 0% to about 4% by weight, Na2O - about 0% to about 4% by weight, B2O3 - about 1% to about 4% by weight, , with the proviso that CaO+NgO is about 22% to about 35% by weight. Glass composition of item 9. 11. The composition SiO2 - about 45% to about 49% by weight, Al2O3 - about 12% to about 16% by weight % by weight, FeO + Fe2O3 - less than about 1.0% by weight, CaO - about 25% by weight ~ about 30% by weight, MgO - about 0% to about 3% by weight, K2O - about 0% to about 3% by weight, Na2O - about 0% to about 3% by weight, B2O3 - about 1% to about 4% by weight, consisting essentially of from about 25% to about 33% by weight of CaO+MgO , the glass composition according to claim 2. 12. Claim 1, wherein said melting is conducted at a temperature of about 1250°C to about 1500°C. Method 3. 13. Glass fibers are coated with platinum or platinum-rotate at a temperature of about 1100°C to about 1350°C. Molten glass is produced by stretching it by passing it through a die. 4. The method of claim 3, wherein the method is formed from lath. 14. The naturally occurring pre-reacted zeolite comprises at least about 4. The method of claim 3, wherein the method is present in the mixture as 35% by weight. 15. The boron component is selected from the classes consisting of borax, perovium, borate, and ulexite. The method according to claim 3, which is disclosed in claim 3. 16. A cementitious body containing a small amount of glass fibers of the composition of claim 1. 17. Claim 1, wherein said fibers are present in about 1% to about 10% by weight of said body. 16th term object. 18. The glass fibers are present in about 1.5% to about 7.5% by weight of the body. Object according to claim 16. 19. A cementitious body containing a small amount of glass fibers of the composition of claim 2. 20. Claim 1, wherein said fibers are present in about 1% to about 10% by weight of said body. Item 19 object. 21. 3. The fibers of claim 1, wherein said fibers are present in about 1.5% to about 7.5% by weight of said body. Object in range 19th term. 22. The glass fibers of the composition of claim 9 may be present in an amount of from about 1% to about 1% by weight of the cementitious body. Cementitious body containing 10% by weight.