It is different from pulverized silica. It is a by-product of the carbothermic reduction of high purity quartz in electric arc furnaces in the production of silicon and ferrosilicon alloys. Global Microsilica market players cover Elkem, Ferroglobe, Erdos Metallurgy, Linyuan Micro-Silica Fume, WINITOOR, All Minmetal International, Chengdu Donglanxing, etc. Product Details and Specifications . Silica fume specification Micro silica uses Silica fume applications 1.Use of microsilica in concrete The advantages of microsilica in concrete are very obvious. The material shall composed of silica fume, mostly of amorphous silica. Microsilica adds several beneficial properties to a refractory product. Ferrosilicon, or ferrosilicium, is a ferroalloy an alloy of iron and silicon with between 15 and 90% silicon. b. Microsilica range from light to dark gray. Specification: Silica fume is supplied in Australia according to AS 3582 part 3. Parameters: Standard Value: Silicon Dioxide(SiO2) 96 % min: Loss on Ignition(L.O.I) 3 % max: Moisture Content(H2O ) 1.0 % max: Percent Retained On . Commonly it is used mineral admixture in high strength concrete. PDS Elkem Microsilica 971 October 2021.pdf PDS Elkem Microsilica HQ October 2021.pdf PDS Elkem Microsilica 968 October 2021.pdf PDS Elkem Microsilica 955 October 2021.pdf Because SiO2 is colorless, the color is determined by the nonsilica components, which typically include carbon and iron oxide.In general, the higher the carbon content, the darker the microsilica. Specifications Capter 2 (210-VI-NEH, April 2015) 31-I-1 Instructions for use Construction Specification 31Concrete for Major Structures 1. The Specifications of Microsilica Product Information - Microsilica . Microsilica Specifications: microsilica for concrete: microsilica grade 970D microsilica grade 940 microsilica grade 920E microsilica grade 920 ASTM microsilica for refractory: microsilica grade 971 microsilica grade 968 . Applicability . Specification. Both actions result in a denser, stronger and less permeable material. At the same time, a gel body is formed with the hydration product. Specification of Microsilica MININGSUN 95%. Specific Surface Area is ranging from 15, 000 to 20, 000 m 2 /kg, has dynamic surface activity.. Cement required is 544 pounds [247 kg]. Advance Micro Silica is much finer than Ordinary Portland Cement (OPC). NYSDOT Materials Procedure 90-1, Materials Method 9.1 and Materials Method 10. Microsilica, also known as silica fume. It is an ultrafine powder collected as a by-product during silicon and ferrosilicon alloy production. Our Microsilica conforms to ASTM 1240 C / 920 D POP up button - comparison chart Advantages of using MicroCast Increased service and structural strength Greater resistance to weathering and corrosivity High Flexural Strength High resistance to chlorides and Sulfides MicroCast - specifications Test Reports and MSDS are available on request. The American Concrete Institute (ACI) defines Microsilica as "very fine non-crystalline silica produced in electric arc furnaces as a by-product of production of elemental silicon or alloys containing silicon" (ACI 116R). (75 to 150 mm) Air Content 5.0 to 8.0 percent Compressive Strength (14 days) 4000 psi (27,500 kPa) minimum Flexural Strength (14 days) 675 psi (4,650 kPa) minimum Standard Specification : Microsilica ( silca fume ) is a byproduct of producing silicon metal or ferrosilicon alloys. Additionally, it reduces 'rebound' in shotcrete applications. Microsilica Grade 920 is a dry silica fume available in Our 92% condensified silica fume is strictly complied with ASTM C-1240 silica fume standard. High strength concrete using microsilica. It is a construction chemical, which is also known as silica fume. It is an ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy production and consists of spherical particles with an average particle diameter of 150 nm. Enhance the strength to resist against sulphate and acidic waters. Recommended amounts of Microsilica are in the range of up to 10 percent of the total weight of the cementitious material. Silica Fume Products This material is highly reactive in cementitious and ceramic bond systems. The silica content in micro silica is very high i.e., over 90%. We have become the largest silica fume producer of stable . MICROSILICA CONCRETE (10-12-01) 1.0 DESCRIPTION This work consists of furnishing and placing a concrete overlay containing microsilica over conventional existing concrete or repair concrete on bridge decks and approach pavement. Ltd. Level 1, 76-80 Turnham Avenue, Rosanna Victoria-3084, Australia Tel : +61 3 9455 4400 Fax : +61 3 9455 4433, Email : enquiry@maxworthgroup.com.au . Microsilica Grade 920 is a dry silica fume available in two main forms: Undensified (U) and Densified (D). c. Minimizes the growth of temperature in preliminary stage. Test methods for chemical analysis, moisture content and loss on ignition, bul Product Information - Microsilica Information Filter dust, arising from the production of silicon or ferrosilicon metal. A. Polymer modified sprayable microsilica restoration mortar for concrete and brick structures. Product Guide Specification SECTION 03935 SPRAYABLE MICROSILICA RESTORATION MORTAR . The report provides a basic overview of Microsilica fume industry including: definition, applications and manufacturing technology. The technical specifications of microsilica used are summarized in Table 5. . CAS No. Specific Surface Area is ranging from 15, 000 to 20, 000 m2/kg, has dynamic surface . Products shall be stored under conditions defined in the technical specification. This report emphasizes the overlays' condition after four years of use. m) Water/Cement Ratio 0.37 to 0.41 (including water in the slurry) Mortar Factor 0.88 to 0.92 Slump 3 to 6 in. American ASTM C1240 Silica fume Industry standard: SiO2: 85.0% H2O: 3% Igloss: 6.0% Grain size (45um sieves): 10%. The specific gravity of microsilica ranges between 2.2 to 2.3 Fig. Current design practices based on descriptive approaches to concrete specification may not be appropriate for the management of aggressive environments. (1) color: micro silica is the by-product reduction generated by high pure quartz in the furnace, coke and sawdust in ferrosilicon and silicon metal production process, the main ingredient is sio2, general micro silica color is between light gray and dark gray, sio2 itself is colorless, its color mainly depend on carbon and iron oxide content, This product reacts chemically with the calcium hydroxide in the cement paste which yields a calcium silicate hydrate gel that significantly enhances strength and durability. Silica fume is an ultrafine material with 80%. The small microsilica particles fill spaces between cement particles and between the cement past matrix and aggregate particles. Production Specification; Production Application; Case; 92% Densified Microsilica ( Silica Fume Grade 92 ) is a pozzolanic material that consists primarily of fine silicon dioxide particles in a non-crystalline form, the min silicon dioxide (SiO2) is 92%. This material is highly reactive in cementitious and ceramic bond systems. e. Special finishes, such as sack rubbed, stone rubbed, and treatment with cement-based coat-ings. The micro silica is formed when SiO gas produced in the furnace mixes with oxygen, oxidizes to Si02, condensing into the pure spherical particles of micro silica that form the major part of the smoke or fume from the furnace. . Specification Applications Cement, Construction Materials and Civil Construction Industry Foundry Industry Refractory Industry Oliver Bonk Business Unit Manager Products Barium Sulphate Bauxite, calcined Boron Carbide Silica fume, also known as microsilica, (CAS number 69012-64-2, EINECS number 273-761-1) is an amorphous (non-crystalline) polymorph of silicon dioxide, silica. Densified microsilica samples submitted to ODOT sometimes do not meet this specification, since the sieving process may not be able to break the bonds formed due to densification. ACC Microsilica is certified according to ISO 9001. Their size and shape help to scatter light, diminishing the look of fine lines and wrinkles on the skin. Parameters: Standard Value: Silicon Dioxide(SiO2) 96.04 %: Loss on Ignition(L.O.I) @ 975C . C1240 Standard specification for microsilica powder in binder mixture. Microsilicais primarily based on amorphous silicon dioxide (SiO2) consisting of sub-micron spherical primary particles and agglomerates of these. Microsilica is a highly reactive pozzolan and gives concrete a denser microstructure, lower permeability higher electrical resistivity leading to improved durability. It is an ultrafine powder collected as a by-product during silicon and ferrosilicon alloy production. The MarketWatch News Department was not involved in the creation of this content. The report explores Global and Chinese major players in market. Technical specifications of microsilica gel Dezomix 4500, in addition to being used in the manufacture of high-strength concrete, sealant, low permeability, high durability and special mortars, is used only in concrete that reduces plastic cracks, relative improvement of tensile and flexural strengths of concrete. Bulk Density:250-350Kg/M3 94% Densified Silica Fume Silica fume, also known as microsilica, is an amorphous (non-crystalline) polymorph of silicon dioxide, silica. In this part, the report presents the company profile, product specifications, capacity, production value, and 2016-2021 market shares for each company. Description Additional information Silica fume, also known as microsilica, is an amorphous (non-crystalline) polymorph of silicon dioxide, silica. American Society for Testing and Materials (ASTM) C 1240 requires wet-sieved microsilica to pass a No. . We, Superior Abrasives Co., Ltd, have been exporting silica fume for more fifteen years. According to the SiO2 content, our products can arrange form grade 85% to grade 98%. Calculate the required fly ash for a 20% replacement as 752 by 0.20 = 151 pounds [341 by 0.20 = 68 kg]. Microsilica (Silica Fume) is a mineral composed of ultrafine amorphous spheres of silicon dioxide (SiO2), produced during the manufacture of silicon or ferrosilicon. High quality, consistent properties and lightness of colour are the special characteristics of Microwhite. . SILICA FUME is produced in conformance with the ASTM C-1240 specifications. Product Description: Mainstay ML-72 is a special blend of portland cement, microsilica, thermoplastic fiber, densifers, admixtures, and other modifiers that produces a high strength, low shrinkage, and low permeability mortar for the rehabilitation of deteriorated concrete structures. yd. . Spherical particles less than 1mm in diameter. Fumed silica is capable of filling pores between cement particles. DOSAGE. The chemical composition and physical properties are regularly tested in accordance with international standards. Properties of Microsilica Microsilica is a grey; nearly white to nearly black powder. The particles are less than 1 micron (0.00004 inch) in diameter, generally 50 to 100 times finer than average cement. 325 sieve with no more than 10% retained. CETEX MicroSilica is a super pozzolan or a finely powdered material used for providing strength and durability tot he concrete mix. Microsilica also combines with calcium hydroxide to form additional calcium hydrate through the pozzolanic reaction. d. Silica fume is cheap; therefore, it is inexpensive. PROPERTIES State Amorphous - Sub-micron powder Color Gray to medium gray powder Specific Gravity 2.25 Solubility Insoluble Force 10,000 Specifications (Microsilica) Concrete Products Technical Guide Specification Microsilica Concrete SECTION 03320 PART 1 - GENERAL 1.01 SUMMARY A. Title of Legally Binding Document: Specification for Silica Fume Number of Amendments: Equivalence: Superceding: Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New--Jawaharlal Nehru Invent a new India using knowledge.--Satyanarayan Gangaram Pitroda Addeddate 2013-09-13 14:43:21 This report summarizes the performance of microsilica concrete (MC) overlays on seven distressed portland cement concrete bridge decks at three sites in Oregon. Mixing time is 20-25% or 50-60 seconds longer than ordinary . Microsilica complies with the provisions and specifications of ASTM C1240 and AASHTO M307. Features: Longer shelf life View Complete Details Silica Fume (Microsilica) 's appearance is grey black powder and average particle size is 0.15 micron in diameter.Specific surface area is ranging from 15,000 to 20,000 m2/kg,has dynamic surface activity. It is an ultrafine powder collected as a by-product during silicon and ferrosilicon alloy production. The use of microsilica in HPC improves . Microsilica is primarily based on amorphous silicon dioxide (SiO2) consisting of sub-micron spherical primary particles and agglomerates of these. Silica fume also has applications in refractory products. influences of microsilica and limestone powder, i.e. Silica Fume (Microsilica)'s bulk density is 150-300kg/m3 in natural (undensified)form. Sep 28, 2022 (The Expresswire) -- The global Fumed Silica market size is expected to expand at a CAGR of 5.36% . Section 02500 - Utility Services B. One of the most beneficial uses for silica fume is in concrete. These fumes are collected and bagged called silica fume. . Specifications; SiO2 (Silicon Dioxide), Amorphous: 92% min: H2O (moisture content when packed) 1.0% max: LOI (Loss on Ignition) 6.0% max, typical 2.13%: . Silica fume (also known as microsilica) is very fine noncrystalline silica by-product resulting from the reduction of high-purity quartz and carbon in electric arc furnaces during the production of elemental silicon or alloys containing silicon. Maxworth International Pty. The main ingredient of silica fume is amorphous silicon dioxide, as the rising . It is also known as condensed silica fume and micro silica. Microsilica, also known as silica fume. This specification covers silica fume for use in concrete and other systems containing hydraulic cement. 3: Microsilica Particles Advantages EUCON MSA is a ready-to-use powdered microsilica (silica fume) concrete admixture. ASTM C1240 - 15 Standard Specification for Silica Fume Used C1240 - 15 Standard Specification for Silica Fume Used in Cementitious Mixtures , The bulk density of microsilica is based on the degree of densification and varies from 130 to 600 kg/m 3. This term simply means that microsilica/silica fume is not a crystalline material. The primary chemical properties of microsilica/silica fume are shown in Table 1.Following is a discussion of each of these properties. What is Silica Fume? Dosages will vary depending on the application and the level of protection required, and typically range between 5% and 15% microsilica by weight of cement. Chemical analysis: SiO 2: 85% to 98%, depending on the production process pH value: 3,0 - 7,5 Colour: white to dark grey Specific gravity: undensified: 250 - 400 kg/m 3 densified: 450 - 750 kg/m 3: Specific surface area: c. 15 m 2 /g . Silica fume is a byproduct of producing silicon metal or ferrosilicon alloys. 9009-54-5, 7631-86-9 MicroSilica Spheres are white, spherical particles with an average size of 12 micron. Note that the major chemical properties are included in the standard specifications for microsilica/silica fume. HPC the dosage may be further increased to 10% replacement by weight of cement. The average particle is 0.15-0.20 micron in diameter. Further, the present invention relates to a method for producing such slurry. It is used as additive for the concrete, it enhance the fluidity, strength, permissibility, corrosive protection of the concrete. Ultrafine silica fume, also known as Microsilica, is an ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy production. Standard specifications for silica fume used in cementitious mixtures . Depending on concrete mix design (concrete type, workability, compressive strength, sizes and types of aggregates, cement content, water/cement ratio, ambient temperature and concreting conditions), a dosage of between 4 and 8 percent by weight of cement is recommended. AASHTO Standard Specifications Sections: M 307 SILICA FUME USED IN CEMENTITIOUS MIXTURES and M 321 HIGH REACTIVITY POZZOLANS FOR USE IN HYDRAULIC CEMENT CONCRETE, MORTAR, AND GROUT. we are manufacturer of micro silica from some of special metathermic (triple heated on metal fremantle systems) calcified processed and non sticky materials under the inspection by our intelligent teamwork.we provide micro silica as per american standard c1240-04, european standard en 13263:2005, canadian standard can/csa a23.5-98, japanese Microsilica is the fume generated during silicon metal production process, the fume are collected by the filtration system and reproduced and densified to become the byproduct. Description Additional information Silica fume, also known as microsilica, is an amorphous (non-crystalline) polymorph of silicon dioxide, silica. Ferrosilicon is also important as an additive to cast irons for controlling the initial content of silicon. Microsilica can be used in gypsum products as a process aid, to improve ingredient dispersion and to improve hardened properties and overall durability, particularly in fire tests. Experience with the material and revision of the MC specifications has reduced construction problems, and . Specification Chemical MICROSILICA Micro Silica, a mineral composed of ultrafine amorphous spheres of silicon dioxide (SiO2), is used as an additive for a stronger durable concrete structure. Silica fume MICROSILICA SIOXID is supplied as a densfied material and, by demand, in its original . Put in coarse aggregate + 75% water + silica fume + 50% fine aggregate and mix for 15-30 seconds, then put in cement + admixture + 50% fine aggregate + 25% water and mix until uniform. some of the specifications of this material are mentioned below: The specific gravity of microsilica differs among 2.2 to 2.3 Benefits: a. Minimizes thermal cracking resulting from the heat of cement hydration. put in the aggregate, followed by silica fume, cement dry mix, then add water and other admixtures. Placed on the market under the name or trade mark of OFZ, a. s. Sirok 381, 027 41 Oravsk . One of the most beneficial uses for silica fume is in concrete. Silica fume, also known as microsilica, (CAS number 69012-64-2, EINECS number 273-761-1) is an amorphous (non-crystalline) polymorph of silicon dioxide, silica. The product ATIC Code is 099. The present invention relates to an aqueous microsilica slurry, the microsilica having a particle size less than 1 m, wherein the slurry contains a polylactic acid as a pH regulator, in an amount of between 0.01 to 10 wt % by the total weight of the slurry. It is commonly used in the construction of bridges and nuclear plants. Its melting point is about 1200 C to 1250 C with a boiling point of 2355 C. Microsilica (Silica Fume) is a mineral composed of ultrafine amorphous spheres of silicon dioxide (SiO 2), produced during the manufacture of silicon or ferrosilicon.The average particle is 0.15-0.20 micron in diameter. HEAD OFFICE. The carbon content of microsilica is affected by many factors relating to the manufacturing process, such . Its packed in 25 kg bags & Big 1 mt Jumbo Bags from Ahmedabad, Gujarat. Silica fume in concrete increases the compressive strength and durability of the concrete. If it gets mixed with the concrete, it enhances the strength and workability. Specification Section 711 - "Concrete Curing Materials and Admixtures" shall apply. It contains a high proportion of iron silicides. 1.02 RELATED SECTIONS A. Buy Microsilica ASTM C 1240 grade 95% from Metal B2B, Microsilica ASTM C 1240 features: SiO2>95% LOI <1.5%, refractory material, higher flowability, would like to accept to inspection by SGS before shipment . The quality is controlled and monitored throughout the entire production process to ensure that it meets or exceeds specification requirements. The sub-micron particles contribute to efficient particle packing, and makes it possible to produce self-flowing castables with a minimum of water addition. GCP Applied Technologies has developed sample specifications for high strength, corrosion protection and . Microsilicacomplies with the provisions and specifications of ASTM C1240 and AASHTO M307. lowing formulas, bulk specific gravity, volume of per-meable pore space, and water absorption of specimens. The physical and chemical characteristics of microsilica add unique properties to refractory castables. Microsilica is typically specified in dosages expressed by weight of cement. Because of its chemical Standard Specification IFI Microsilica (Silica Fume) meeting the requirements of ASTM C 1240, EN 13263, JIS A 6207 and ISIRI 13278. According to the SiO2 content, our products can arrange form grade 85% to grade 98%. Calculate the required microsilica for a 7.6% replacement as 752 by .076 = 57 pounds [341 by .076 = 26 kg]. MICROSILICA - SIOXID class 2 contains > 80 0/0 of Si02 by mass. For other grades, check with your local Elkem representative. The optimum dosage of Microsilica Gel RB-MSNP can be determined by trials in the site. Silica Fume Introduction. Microsilica Specification SiO2 >95% Powdered, Densified Microsilica Admixture View Item For over a century, The Euclid Chemical Company has served the global building market as a worldwide quality supplier of specialty products and technical support services for the concrete and masonry construction industry. This section specifies microsilica (silica fume) admixture for the reduction of concrete permeability to protect against intrusion by chlorides and other aggressive chemicals, and for the . Microsilica is a mineral admixture composed of very fine solid glassy spheres of silicon dioxide (SiO2). View in full-text Similar. Main Applications Concrete and cements Refractory and Ceramics Polymer and chemical industry Oil well grouting Microsilica Applications in Concrete Amorphous. 96% Undensified Silica Fume (20 kg/cu. Microsilica powder for concrete is the original silica fume product. e. Silica fume, also known as microsilica, is an amorphous polymorph of silicon dioxide, silica. As an admixture, microsilicacan improve the properties of both fresh and hardened concrete. Silica fume consists of very fine vitreous particles with a surface area . The super fine microsilica fills the voids between cement particles creating a very dense, less permeable concrete.