Application of Microsilica

{"news_id":8649,"is_preview":0,"news_info":{"id":8649,"company_id":176,"user_id":411,"author":"","website_id":781,"pub_date":"2024-02-18 11:14:01","urla":"innovation-and-application-of-microsilica-in-the-materials-industry","description":"It covers microsilica's key properties, common applications when added to concrete and mortar, recommended dosage rates across different construction uses, as well as proper","image_url":"https:\/\/oss.matchpages.cn\/matchpages\/common\/2024\/0218\/6970\/65d1727935846\/_MG_7263--1---1-.webp","image_alt":"_MG_7263 (1) (1).webp","title":"Innovation and application of microsilica in the materials industry","content":"<h1 style=\"line-height: 1.6;\"><span style=\"font-size: 18pt; color: #181818;\"><strong>Innovation and application of microsilica in the materials industry<\/strong><\/span><\/h1>\n<h2><strong><span style=\"color: #169179; font-size: 14pt;\">Physical and chemical properties of microsilica:<\/span><\/strong><\/h2>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">1. microsilica: the appearance of grey or white powder.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">2. the fineness of microsilica: <span style=\"color: #777777;\">microsilica fineness less than 1&micro;m accounted for more than 80%, the average particle size of 0.1 ~ 0.3&micro;m, the specific surface area of: 20 ~ 28m<sup>2<\/sup> \/ g. Its fineness and specific surface area of about 80 ~ 100 times the cement, fly ash 50 ~ 70 times.<\/span><\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">3.particle morphology and mineral phase structure: <span style=\"color: #777777;\">microsilica in the formation process, due to the process of phase transition by the role of surface tension, the formation of amorphous non-crystalline phase amorphous spherical particles, and the surface is relatively smooth, and some of them are more than one spherical particles stuck together in the agglomerate. It is a kind of volcanic ash material with large specific surface area and high activity. Doped with microsilica materials, tiny spherical bodies can play a lubricating role.<\/span><\/span><\/p>\n<p style=\"line-height: 1.6;\"><img src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2024\/0218\/8250\/65d1687fd61b1\/%E5%9B%BE%E7%89%871--4-.webp\" alt=\"ACC&reg; Zirconia microsilica\uff1aZSF G94 \" width=\"300\" data-resolution=\"954*720\" \/><img src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2024\/0218\/6691\/65d1687fcf24f\/%E5%9B%BE%E7%89%872--5-.webp\" alt=\"ACC&reg; densified microsilica\uff1aG85D \" width=\"300\" data-resolution=\"551*413\" \/><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\"><a href=\"https:\/\/www.allcarbon.com.cn\/white-microsilica\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><span style=\"text-decoration: underline;\"><span style=\"color: #2dc26b; text-decoration: underline;\"><strong>ACC&reg; Zirconia microsilica<\/strong><\/span><\/span><\/a>\uff1aZSF G94;SiO\u2082&gt;92%, ZrO\u2082&lt;2%\uff1bmainly used for low cement casting and prefabricated parts, it can help improve the bond strength, increase joint tightness, and more corrosion resistance.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\"><a href=\"https:\/\/www.allcarbon.com.cn\/densified-microsilica\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><span style=\"text-decoration: underline;\"><span style=\"color: #2dc26b; text-decoration: underline;\"><strong>ACC&reg; densified microsilica<\/strong><\/span><\/span><\/a>\uff1aG85D\uff1aSiO\u2082&gt;85%, Bulk density: Around 500-700kg\/m&sup3;\uff1bit&rsquo;s collected, and packed from ferrosilicon or silicon metal factories directly, the automatic and integrated production process guarantees the consistent quality.<\/span><\/p>\n<h2><span style=\"color: #169179; font-size: 14pt;\"><strong>Usage<\/strong><\/span><\/h2>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">Microsilica can fill the pores between cement particles, and at the same time generate gel with hydration products, and react with alkaline material magnesium oxide to generate gel. In the cement-based concrete, mortar and refractory casting materials, mixed with an appropriate amount of&nbsp;microsilica, can play the following roles:<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\"><span style=\"color: #777777;\">(1)significantly improve the compressive, flexural, impermeable, anti-corrosion, impact resistance and wear resistance.<\/span><\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(2)with water retention, prevent segregation, water secretion, significantly reduce the concrete pumping resistance.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(3)significantly extend the service life of concrete. Especially in the chloride salt pollution erosion, sulfate erosion, high humidity and other harsh environments, can make the durability of concrete doubled or even several times.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(4)Dramatically reduce the shotcrete and pouring material falling ash, improve the thickness of single spray layer.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(5)It is a necessary ingredient of high strength concrete, and has been applied to C150 concrete project.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(6)It has the effect of about 5 times of cement, which can reduce the cost when applied in common concrete and low cement casting material. Improve durability.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(7)Effectively prevent the occurrence of concrete alkali aggregate reaction.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(8)Improve the denseness of castable refractory material. When co-existing with Al2O3, it is easier to generate mullite phase, so that its high-temperature strength, resistance to thermal vibration is enhanced.<\/span><\/p>\n<h2 style=\"line-height: 1.6;\"><span style=\"font-size: 14pt;\"><strong><span style=\"color: #169179;\">The scope of application<\/span><\/strong><\/span><\/h2>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">Commercial concrete, high-strength concrete, self-levelling concrete, indeterminate refractory materials, dry-mixed (ready-mixed) mortar, high-strength non-shrinkage grout, abrasion-resistant industrial flooring, repair mortar, polymer mortar, thermal insulation mortar, seepage-resistant concrete, concrete densifying agent, concrete anticorrosive agent, cementitious polymer waterproofing agent; reinforcement of rubber, plastics, unsaturated polyester, paints, coatings, and other macromolecular materials, modification of ceramic products and so on.<\/span><\/p>\n<h2 style=\"line-height: 1.6;\"><span style=\"color: #169179; font-size: 14pt;\"><strong>The application field<\/strong><\/span><\/h2>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">1. Used in mortar and concrete: high-rise buildings, seaport terminals, reservoir dams, water conservancy, culverts, railways, highways, bridges, subways, tunnels, airport runways, concrete pavement, and coal mine roadway anchor spray reinforcement.<\/span><\/p>\n<p><span style=\"color: #181818;\">2. Materials industry:<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">(1) high-grade high-performance low cement <a href=\"https:\/\/www.allcarbon.com.cn\/microsilica-for-refractory\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><span style=\"text-decoration: underline;\"><strong><span style=\"color: #2dc26b; text-decoration: underline;\">refractory<\/span><\/strong><\/span><\/a> castables and prefabricated parts, the service life is three times that of ordinary castables, the refractoriness is increased by about 100 \u2103, the high-temperature strength and resistance to thermal shock performance are significantly improved. It has been widely used in coke oven, iron making, steel making, steel rolling, non-ferrous metal, glass, ceramics and power generation industries.<\/span><\/p>\n<p><span style=\"color: #181818;\"><img src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2024\/0218\/4597\/65d1687fd4c93\/%E5%9B%BE%E7%89%873--5-.webp\" alt=\"microsilica for Refractory \" width=\"500\" data-resolution=\"762*448\" \/><\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">(2) Large-scale iron ditch and ladle materials, breathable bricks, coated repair materials.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">(3) Self-flowing refractory casting materials and dry and wet method of spraying construction applications.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">(4) Oxide bonded silicon carbide products (ceramic kiln furniture, flame separator plate, etc.).<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">(5) High-temperature calcium silicate lightweight heat-insulating materials.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">(6) Corundum mullite push plate for electric porcelain kiln.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">(7) High-temperature wear-resistant materials and products.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">(8) Corundum and <a href=\"https:\/\/www.allcarbon.com.cn\/microsilica-for-ceramic\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><span style=\"text-decoration: underline; color: #2dc26b;\"><strong>ceramic products<\/strong><\/span><\/a>.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\"><img src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2024\/0218\/7922\/65d1687fcf6a6\/%E5%9B%BE%E7%89%874--5-.webp\" alt=\"microsilica for creamic \" width=\"500\" data-resolution=\"726*408\" \/><\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">(9) Cylon bonded products. At present, in addition to the general use of cast refractories, in the electrofusion and sintered refractories have also gained a large number of applications.<\/span><\/p>\n<p><span style=\"color: #181818;\">3. New wall materials, finishing materials:<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(1) wall insulation with polymer mortar, thermal insulation mortar, interface agent.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(2) Cement-based polymer waterproofing materials.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(3) Lightweight aggregate thermal insulation and energy-saving concrete and products.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(4) Putty powder processing for internal and external wall construction.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><img src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2024\/0218\/2880\/65d1687fcc351\/%E5%9B%BE%E7%89%875--5-.webp\" alt=\"microsilica for cement \" width=\"500\" data-resolution=\"755*483\" \/><\/p>\n<p><span style=\"color: #181818;\">4.Other uses:<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(1) Silicate brick raw materials.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(2) Production of water glass.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(3) Used as reinforcing material for organic compounds. Because its composition is similar to the silica produced by gas phase method. It can be used in rubber, resin, paint, paint, unsaturated polyester and other polymer materials as filler reinforcing materials.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(4) Used as anti-caking agent in fertiliser industry.<\/span><\/p>\n<p><span style=\"color: #181818;\">5. Method of use and precautions<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">5.1Admixture: generally 5-10% of the amount of cementitious materials. The mixing method of microsilica is divided into internal mixing and external mixing.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(1) internal mixing: under the premise of adding the same amount of water, 1 part of microsilica can replace 3-5 parts of cement (weight) and keep the compressive strength of concrete unchanged and improve other properties of concrete.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(2) external mixing: the amount of cement remains unchanged, the addition of microsilica significantly improves the strength of concrete and other properties. Concrete mixed with microsilica has a certain slump loss. This point needs to be noted in the proportion test.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">Microsilica&nbsp;must be used in conjunction with water reducing agent, it is recommended to mix fly ash and ground slag to improve its workability.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">Microsilica is used to formulate concrete, generally with the weight ratio of cementitious materials:<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(i) High performance concrete: 5-10%;<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(ii) hydraulic concrete: 5-10 per cent<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(iii) Shotcrete: 5-10%;<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(iv) Pump aid: 2-3%;<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(v) Wear-resistant industrial flooring: 6-8%;<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(vi) polymer mortar, thermal insulation mortar: 10-15%.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(vii) Shape-less refractory castables: 6-8%. Before using, please select the reasonable and economic dosage through experiment according to the actual need.<\/span><\/p>\n<p><span style=\"color: #181818;\">5.2 Admixture method:<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">Microsilica&nbsp;concrete and castables should be made by the laboratory to make the construction ratio. Strictly according to the proportion of construction. In the mixing of microsilica concrete, microsilica should be added into the mixer immediately after the feeding of aggregate. There are two procedures for adding:<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(1) Put in aggregate, then put in microsilica, cement after dry mixing, and then add water and other additives.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #777777;\">(2) Put in coarse aggregate + 75% water + microsilica + 50% fine aggregate, mix for 15-30 seconds, then put in cement + admixture + 50% fine aggregate + 25% water, mix until uniform. The mixing time is 20-25% or 50-60 seconds longer than ordinary concrete. Never add the microsilica into the already mixed concrete.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">5.3 Construction method:<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">There is no significant difference between the construction method of microsilica&nbsp;concrete and ordinary concrete, but it is necessary to organise and vibrate the concrete densely well during construction. Microsilica concrete will make the performance of early strength of the final set time in advance, in the plastering should be paid attention to; at the same time mixed with microsilica will improve the viscosity of concrete and greatly reduce the water secretion, so that the plastering is slightly difficult.<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">5.4 Construction safety:<\/span><\/p>\n<p style=\"line-height: 1.6;\"><span style=\"color: #181818;\">The construction safety of microsilica concrete should be in strict accordance with the relevant national construction norms for concrete works, but because of the lightness of microsilica, it is strictly prohibited to throw the material at high altitude to prevent the microsilica from flying.<\/span><\/p>","discuss":0,"seo_title":"Application of Microsilica |  ACC","seo_keyword":"microsilica suppliers,microsilica,Silica fume,Silica fume supplier","seo_describe":"ACC is one of the largest microsilica suppliers in China. Through this article, we provide you with microsilica's key properties, common applications .","track_code":"","viewer":"","source_copy_id":0,"sort":49,"status":0,"data_time":"2024-02-18 11:14:01","create_time":"2024-02-18 11:09:47","update_time":"2025-04-02 09:56:43","type_items":[{"id":2204,"website_id":781,"name":"Microsilica","urla":""}],"tag_items":[]}}

<h1 style="line-height: 1.6;"><span style="font-size: 18pt; color: #181818;"><strong>Innovation and application of microsilica in the materials industry</strong></span></h1>
<h2><strong><span style="color: #169179; font-size: 14pt;">Physical and chemical properties of microsilica:</span></strong></h2>
<p style="line-height: 1.6;"><span style="color: #181818;">1. microsilica: the appearance of grey or white powder.</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">2. the fineness of microsilica: <span style="color: #777777;">microsilica fineness less than 1µm accounted for more than 80%, the average particle size of 0.1 ~ 0.3µm, the specific surface area of: 20 ~ 28m<sup>2</sup> / g. Its fineness and specific surface area of about 80 ~ 100 times the cement, fly ash 50 ~ 70 times.</span></span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">3.particle morphology and mineral phase structure: <span style="color: #777777;">microsilica in the formation process, due to the process of phase transition by the role of surface tension, the formation of amorphous non-crystalline phase amorphous spherical particles, and the surface is relatively smooth, and some of them are more than one spherical particles stuck together in the agglomerate. It is a kind of volcanic ash material with large specific surface area and high activity. Doped with microsilica materials, tiny spherical bodies can play a lubricating role.</span></span></p>
<p style="line-height: 1.6;"><img src="https://oss.matchpages.cn/matchpages/common/2024/0218/8250/65d1687fd61b1/%E5%9B%BE%E7%89%871--4-.webp" alt="ACC® Zirconia microsilica：ZSF G94 " width="300" data-resolution="954*720" /><img src="https://oss.matchpages.cn/matchpages/common/2024/0218/6691/65d1687fcf24f/%E5%9B%BE%E7%89%872--5-.webp" alt="ACC® densified microsilica：G85D " width="300" data-resolution="551*413" /></p>
<p style="line-height: 1.6;"><span style="color: #181818;"><a href="https://www.allcarbon.com.cn/white-microsilica" data-page_id="0" data-page_name="" data-page_type=""><span style="text-decoration: underline;"><span style="color: #2dc26b; text-decoration: underline;"><strong>ACC® Zirconia microsilica</strong></span></span></a>：ZSF G94;SiO₂>92%, ZrO₂<2%；mainly used for low cement casting and prefabricated parts, it can help improve the bond strength, increase joint tightness, and more corrosion resistance.</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;"><a href="https://www.allcarbon.com.cn/densified-microsilica" data-page_id="0" data-page_name="" data-page_type=""><span style="text-decoration: underline;"><span style="color: #2dc26b; text-decoration: underline;"><strong>ACC® densified microsilica</strong></span></span></a>：G85D：SiO₂>85%, Bulk density: Around 500-700kg/m³；it’s collected, and packed from ferrosilicon or silicon metal factories directly, the automatic and integrated production process guarantees the consistent quality.</span></p>
<h2><span style="color: #169179; font-size: 14pt;"><strong>Usage</strong></span></h2>
<p style="line-height: 1.6;"><span style="color: #181818;">Microsilica can fill the pores between cement particles, and at the same time generate gel with hydration products, and react with alkaline material magnesium oxide to generate gel. In the cement-based concrete, mortar and refractory casting materials, mixed with an appropriate amount of microsilica, can play the following roles:</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;"><span style="color: #777777;">(1)significantly improve the compressive, flexural, impermeable, anti-corrosion, impact resistance and wear resistance.</span></span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(2)with water retention, prevent segregation, water secretion, significantly reduce the concrete pumping resistance.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(3)significantly extend the service life of concrete. Especially in the chloride salt pollution erosion, sulfate erosion, high humidity and other harsh environments, can make the durability of concrete doubled or even several times.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(4)Dramatically reduce the shotcrete and pouring material falling ash, improve the thickness of single spray layer.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(5)It is a necessary ingredient of high strength concrete, and has been applied to C150 concrete project.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(6)It has the effect of about 5 times of cement, which can reduce the cost when applied in common concrete and low cement casting material. Improve durability.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(7)Effectively prevent the occurrence of concrete alkali aggregate reaction.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(8)Improve the denseness of castable refractory material. When co-existing with Al2O3, it is easier to generate mullite phase, so that its high-temperature strength, resistance to thermal vibration is enhanced.</span></p>
<h2 style="line-height: 1.6;"><span style="font-size: 14pt;"><strong><span style="color: #169179;">The scope of application</span></strong></span></h2>
<p style="line-height: 1.6;"><span style="color: #181818;">Commercial concrete, high-strength concrete, self-levelling concrete, indeterminate refractory materials, dry-mixed (ready-mixed) mortar, high-strength non-shrinkage grout, abrasion-resistant industrial flooring, repair mortar, polymer mortar, thermal insulation mortar, seepage-resistant concrete, concrete densifying agent, concrete anticorrosive agent, cementitious polymer waterproofing agent; reinforcement of rubber, plastics, unsaturated polyester, paints, coatings, and other macromolecular materials, modification of ceramic products and so on.</span></p>
<h2 style="line-height: 1.6;"><span style="color: #169179; font-size: 14pt;"><strong>The application field</strong></span></h2>
<p style="line-height: 1.6;"><span style="color: #181818;">1. Used in mortar and concrete: high-rise buildings, seaport terminals, reservoir dams, water conservancy, culverts, railways, highways, bridges, subways, tunnels, airport runways, concrete pavement, and coal mine roadway anchor spray reinforcement.</span></p>
<p><span style="color: #181818;">2. Materials industry:</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">(1) high-grade high-performance low cement <a href="https://www.allcarbon.com.cn/microsilica-for-refractory" data-page_id="0" data-page_name="" data-page_type=""><span style="text-decoration: underline;"><strong><span style="color: #2dc26b; text-decoration: underline;">refractory</span></strong></span></a> castables and prefabricated parts, the service life is three times that of ordinary castables, the refractoriness is increased by about 100 ℃, the high-temperature strength and resistance to thermal shock performance are significantly improved. It has been widely used in coke oven, iron making, steel making, steel rolling, non-ferrous metal, glass, ceramics and power generation industries.</span></p>
<p><span style="color: #181818;"><img src="https://oss.matchpages.cn/matchpages/common/2024/0218/4597/65d1687fd4c93/%E5%9B%BE%E7%89%873--5-.webp" alt="microsilica for Refractory " width="500" data-resolution="762*448" /></span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">(2) Large-scale iron ditch and ladle materials, breathable bricks, coated repair materials.</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">(3) Self-flowing refractory casting materials and dry and wet method of spraying construction applications.</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">(4) Oxide bonded silicon carbide products (ceramic kiln furniture, flame separator plate, etc.).</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">(5) High-temperature calcium silicate lightweight heat-insulating materials.</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">(6) Corundum mullite push plate for electric porcelain kiln.</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">(7) High-temperature wear-resistant materials and products.</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">(8) Corundum and <a href="https://www.allcarbon.com.cn/microsilica-for-ceramic" data-page_id="0" data-page_name="" data-page_type=""><span style="text-decoration: underline; color: #2dc26b;"><strong>ceramic products</strong></span></a>.</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;"><img src="https://oss.matchpages.cn/matchpages/common/2024/0218/7922/65d1687fcf6a6/%E5%9B%BE%E7%89%874--5-.webp" alt="microsilica for creamic " width="500" data-resolution="726*408" /></span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">(9) Cylon bonded products. At present, in addition to the general use of cast refractories, in the electrofusion and sintered refractories have also gained a large number of applications.</span></p>
<p><span style="color: #181818;">3. New wall materials, finishing materials:</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(1) wall insulation with polymer mortar, thermal insulation mortar, interface agent.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(2) Cement-based polymer waterproofing materials.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(3) Lightweight aggregate thermal insulation and energy-saving concrete and products.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(4) Putty powder processing for internal and external wall construction.</span></p>
<p style="line-height: 1.6;"><img src="https://oss.matchpages.cn/matchpages/common/2024/0218/2880/65d1687fcc351/%E5%9B%BE%E7%89%875--5-.webp" alt="microsilica for cement " width="500" data-resolution="755*483" /></p>
<p><span style="color: #181818;">4.Other uses:</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(1) Silicate brick raw materials.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(2) Production of water glass.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(3) Used as reinforcing material for organic compounds. Because its composition is similar to the silica produced by gas phase method. It can be used in rubber, resin, paint, paint, unsaturated polyester and other polymer materials as filler reinforcing materials.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(4) Used as anti-caking agent in fertiliser industry.</span></p>
<p><span style="color: #181818;">5. Method of use and precautions</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">5.1Admixture: generally 5-10% of the amount of cementitious materials. The mixing method of microsilica is divided into internal mixing and external mixing.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(1) internal mixing: under the premise of adding the same amount of water, 1 part of microsilica can replace 3-5 parts of cement (weight) and keep the compressive strength of concrete unchanged and improve other properties of concrete.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(2) external mixing: the amount of cement remains unchanged, the addition of microsilica significantly improves the strength of concrete and other properties. Concrete mixed with microsilica has a certain slump loss. This point needs to be noted in the proportion test.</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">Microsilica must be used in conjunction with water reducing agent, it is recommended to mix fly ash and ground slag to improve its workability.</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">Microsilica is used to formulate concrete, generally with the weight ratio of cementitious materials:</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(i) High performance concrete: 5-10%;</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(ii) hydraulic concrete: 5-10 per cent</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(iii) Shotcrete: 5-10%;</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(iv) Pump aid: 2-3%;</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(v) Wear-resistant industrial flooring: 6-8%;</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(vi) polymer mortar, thermal insulation mortar: 10-15%.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(vii) Shape-less refractory castables: 6-8%. Before using, please select the reasonable and economic dosage through experiment according to the actual need.</span></p>
<p><span style="color: #181818;">5.2 Admixture method:</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">Microsilica concrete and castables should be made by the laboratory to make the construction ratio. Strictly according to the proportion of construction. In the mixing of microsilica concrete, microsilica should be added into the mixer immediately after the feeding of aggregate. There are two procedures for adding:</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(1) Put in aggregate, then put in microsilica, cement after dry mixing, and then add water and other additives.</span></p>
<p style="line-height: 1.6;"><span style="color: #777777;">(2) Put in coarse aggregate + 75% water + microsilica + 50% fine aggregate, mix for 15-30 seconds, then put in cement + admixture + 50% fine aggregate + 25% water, mix until uniform. The mixing time is 20-25% or 50-60 seconds longer than ordinary concrete. Never add the microsilica into the already mixed concrete.</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">5.3 Construction method:</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">There is no significant difference between the construction method of microsilica concrete and ordinary concrete, but it is necessary to organise and vibrate the concrete densely well during construction. Microsilica concrete will make the performance of early strength of the final set time in advance, in the plastering should be paid attention to; at the same time mixed with microsilica will improve the viscosity of concrete and greatly reduce the water secretion, so that the plastering is slightly difficult.</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">5.4 Construction safety:</span></p>
<p style="line-height: 1.6;"><span style="color: #181818;">The construction safety of microsilica concrete should be in strict accordance with the relevant national construction norms for concrete works, but because of the lightness of microsilica, it is strictly prohibited to throw the material at high altitude to prevent the microsilica from flying.</span></p>