SNF-Bailin Group

2022-07-09

Causes and Prevention of Whitening and Frosting on Concrete Surface

The appearance quality of concrete is an intuitive reflection of the quality of concrete. The uniformity and glossiness of the concrete surface are more and more concerned by construction contractors and owners, and the requirements are getting higher and higher, which has gradually become an important economic factor.Whitening is the most common phenomenon on concrete surfaces. According to incomplete statistics, the phenomenon of whitening in concrete projects is as high as 36%, which is one of the "diseases" that are difficult to deal with in construction projects. Generally, it will not cause quality accidents of building structures. The assessment of quality levels can have serious consequences.Mechanism of whitening and frosting on concrete surface:The whitening of the concrete surface, commonly known as efflorescence or blooming, is generally believed to be caused by the hydration of C3S and C2S to form C-S-H gel during the cement hydration process, and a large amount of Ca(OH)2 is formed, while Ca(OH)2 It is an extremely soluble substance, which often exists in the free water of concrete in the early stage of hydration.In the early stage of concrete setting and hardening, as the concrete dries, the free water with a high concentration of calcium hydroxide inside the structure will gradually migrate outward along the internal capillary pores to compensate for the water evaporated from the surface, and the Ca dissolved in it will be released. After (OH)2 is brought to the concrete surface, Ca(OH)2 will chemically react with CO₂ and moisture in the air to form a water-insoluble white precipitate CaCO₃, which adheres to the concrete surface. This efflorescence produced during hardening is called primary whitening.During the hardening process of concrete, the hardening speed gradually slows down; under the erosion of rain and snow, water will penetrate into the concrete in some parts, and will dissolve the remaining calcium hydroxide. When it is high and evaporates, the calcium hydroxide dissolved in it will be brought to the surface of the structure again, resulting in secondary whitening.The second whitening is different from the first whitening. In most cases, it does not appear on the entire surface of the concrete, but is unevenly distributed on the local surface. This whitening is related to cement type, amount, compactness, water absorption and porosity. The rough surface is easy to accumulate water, the interior is loose, and the parts with high water absorption are most likely to have multiple whitening.Causes and preventive measures of whitening of concrete surface:01. The mixed concrete is bleedingThe more water seeps out of the surface of the structure during initial setting, the greater the severity of blushing. Mainly in the following aspects:(1) The water-cement ratio is too large. The larger the water-cement ratio, the more free water in the mixture, the greater the possibility of concrete bleeding, and the more whitening of the concrete. Therefore, under the premise of satisfying the construction operation, the water consumption for mixing should be reduced as much as possible, and the water-cement ratio should be reduced.(2) Excessive dosage of admixtures will also cause the concrete mixture to bleed. In this case, the dosage of admixtures should be reduced.(3) Related to cement. Affected by the source of raw materials, production control and process conditions, the mineral content of cement produced by different manufacturers is also different. In general, for cement with high C3A content, because of its fast hydration and large adsorption capacity of admixtures, the over-mixing of admixtures is avoided under the same conditions, and it is not easy to cause leakage caused by excessive admixtures. water. For cement with low C3A content, the amount of admixture should be appropriately reduced.(4) It is related to the mix ratio of concrete and aggregate gradation. Mixtures with too small sand ratio or poor gradation are prone to bleeding.(5) Under the condition that other conditions remain unchanged, the mixing plant generally hopes to adapt to the change of raw materials through the adjustment of admixtures and meet the pumping requirements of different grades of concrete. Adding an appropriate amount of water-retaining, plastic-retaining and air-entraining components to the admixture is beneficial to improving the workability of concrete and reducing bleeding and settlement.02. High content of soluble salts and alkalis in building materials(1) Cement is the main component of concrete. The higher the alkali metal oxide content of the cement itself, the more alkali can be precipitated under certain conditions, and the greater the possibility of whitening the surface of the mixed concrete. The alkali content of cement also has a great influence on the effect of admixtures. Therefore, when selecting cement, low-alkali cement should be used as much as possible.(2) The level of soluble salt content in aggregate is also an important factor affecting the whitening of concrete surface. If conditions permit, there should be a certain selectivity to the aggregate, and its soluble salt content should be strictly controlled.(3) Naphthalene-based concrete admixtures are currently the most widely used, mostly with low concentrations. The content of Na₂SO₄ is relatively high, which increases the soluble substances in the concrete, thus increasing the possibility of whitening the concrete surface. Minimizing the alkali content of the admixture is not only beneficial to prevent the alkali-aggregate reaction, but also can improve the use effect of the admixture.(4) When preparing concrete, add some active siliceous admixtures in an appropriate amount. In the process of cement hydration, SiO₂ can react with Ca(OH)2 produced by the hydration of cement mineral components C3S and C2S to form C-S-H gel, which is more likely to react with strong alkali NaOH and KOH in cement to reduce free radicals in concrete. alkali content. In this way, after the concrete is hardened and dried, even if water penetrates into the base material, the amount of salt or alkali available for precipitation is very small. High-quality mineral admixtures have a good effect on preventing whitening of concrete surfaces.Concrete itself is permeableDue to the requirements of construction, the water-cement ratio of the concrete mixture is always greater than the theoretical value required for cement hydration. Excessive water often causes bleeding during the concrete pouring and vibrating process, which causes the formation of hydrophobic channels inside the concrete, or stays in the concrete. Inside the concrete, which collects under the coarse aggregate, is evaporated at a later stage of hardening to form internal voids. In addition, after the cement is hydrated, the volume reduction of the hydrate will also cause internal pores or gaps, resulting in a certain permeability of the concrete.(1) The addition of admixtures can reduce the water-cement ratio, reduce excess water, and greatly improve the compactness of concrete. A certain air-entraining component is mixed into the admixture to improve workability, prevent bleeding and settlement, reduce the large capillary pores on the interface between aggregate and cement stone, and generate a large number of tiny air bubbles distributed in the voids of concrete. It is also collected on the passage of the capillary, and the capillary is cut off, and the impermeability of the concrete is greatly improved.(2) To strengthen construction management, the concrete should be vibrated and compacted, so that the external moisture is not easy to enter the interior of the component. To strengthen the plastering surface, it is best to plaster the surface again before the initial setting, so that the micro-cracks on the surface due to the evaporation of water are closed, and the cement slurry floating layer is dense, thereby improving the impermeability of the surface layer and preventing whitening.(3) For projects with high requirements on concrete appearance quality, a layer of transparent waterproof coating can also be sprayed on the concrete surface to fill and compact the pores on the concrete surface to achieve the purpose of anti-penetration.The maintenance is not timely, the method is improper or the maintenance time is not enoughConcrete should be cured in time after final setting to slow down the drying and evaporation rate. When water penetrates from the concrete surface to the interior, carbon dioxide in the air enters the concrete and chemically reacts with calcium hydroxide dissolved in water to form calcium carbonate precipitation. If it is not maintained in time, when the concrete is hardened and dried, the water will migrate from the inside to the outside, and the soluble substances will be carried to the surface of the concrete. Before the strength of the pouring structure is completely dry, the curing and covering should not be stopped prematurely. Generally, the insulation and moisturizing maintenance is not less than 14 days after construction. Practice has found that the concrete test block placed outdoors is still shiny on the second day after hardening, and begins to whiten on the third day, but there is no whitening phenomenon if it is maintained in time. Most of the reasons for the serious whitening of the test blocks on the construction site are that they are placed in the open air without necessary maintenance.In short, there are many factors that cause the whitening of the concrete surface, such as: weather, temperature and humidity, types of additives, etc., and various factors are interrelated and affect each other. Only by taking practical preventive measures in combination with local raw material conditions and actual work conditions can we effectively reduce the whitening of the concrete surface and meet people's high requirements for concrete appearance quality....

2022-06-03

SNF Sodium Naphthalene Sulfonate Formaldehyde

Sodium Naphthalene Formaldehyde (SNF-Superplasticizer for Concrete)INTORDUCTION:CAS Code: 36290-04-7HS Code (CN): 38244010SNF a high range water reducer, commonly referred to as a super plasticizer, also named Naphthalene Sulphonate Formaldehyde Condensate (short name: SNF, PNS, NSF, etc…)SNF is made from naphthalene, sulfuric acid, formaldehyde and liquid alkali, through sulfonation, hydrolyzation, condensation and neutralization reaction and then drying to powder. SNF-A5% contains very small chloride. Thus, it meets the requirements of chemical admixture specifications for concrete: ASTM Designation C 494 as a Type F admixture, GB8076-2008 and GB50119-2003.UsageSNF produces concrete with extremely workable characteristics referred to as high slump.SNF also allows concrete to be produced with very low water/cement ratios at low or normal slumps.SNF is ideal for use in pre stress, precast, bridge deck or any concrete where it is desired to keep the water/cement ratio to a minimum and still achieve the degree of workability necessary to provide easy placement and consolidation.SNF will also fluidize concrete, making it ideal for tremie concreting or other applications where high slumps are desired.SNF is compatible with Portland Cement, Normal Portland cement, Portland Slag Cement, Fly-ash Cement, Portland Pozzolanic Cement, etc.SPEC:Advantages:SNF produces high slump flowable concrete with no loss in strength.SNF produces low water/cement ratio concrete and therefore, high strengths.SNF in prestress/precast work, can be used to substantially reduce or eliminate the high energy requirements of external heat for accelerated curing.SNF concrete, even at high slump, exhibits no significant segregation in comparison to concrete without a super-plasticizer at the same slump.SNF aids in rapid discharge of concrete from truck mixers thereby reducing on the job time and improving mixer utilization.About Bailin Group Company for SNF production1, Free sample2,The biggest manufacturer of SNF in Asia with 9000000 MTs capacity one year.3,The raw material is also produced ourself,so we can supply the best price at best and stable quality.4,We also produce sodium gluconate,we can supply SNF and Sodium Gluconate together,in this way,you can save cost. and time5,Within 7 days delivery time after deposit.Packing:25 kgs,600 kgs,650 kgs or 700 kgs one bag with PE film inside,also based on your requirement with pallet.Shipping:Sea Transport,Railway Transport and Air Transport is all available....

2022-05-23

Application of Sodium polynaphthalene formaldehyde sulfonate

Background and overviewPolynaphthalene formaldehyde sulfonate sodium salt (SNF-A/SNF-C) is a brown or dark brown powder. It is commonly used as dispersant and filler for disperse dyes, reactive dyes, pesticides, leather tanning agent, cement concrete water reducing agent for construction, and oil well cement water reducing agent. If inhaled sodium polynaphthalene formaldehyde sulfonate, move the patient to fresh air; in case of skin contact, remove contaminated clothing, rinse skin thoroughly with soap and water, seek medical attention if discomfort occurs; if contact with eyes , should separate the eyelids, rinse with running water or normal saline, and seek medical attention immediately; if ingested, rinse mouth immediately, do not induce vomiting, seek medical attention immediately.ApplicationPolynaphthalene formaldehyde sulfonate sodium salt is often used in dispersive dyes, reactive dyes, pesticide diffusing agent, filler, leather tanning agent, building cement concrete water reducing agent, as oil well cement water reducing agent, etc. Examples of its application are as follows:1) Preparation of a disperse red dye, comprising the following steps: S1, fully mixing C.I. disperse red 74 dye and sodium polynaphthalene formaldehyde sulfonate; S2, adding sodium lignosulfonate to the mixture in step S1 and fully Mixing; S3, adding sodium carboxymethyl cellulose and polysorbate 80 to the mixture in step S2 and mixing thoroughly; S4, adding a cationic surfactant to the mixture in step S3 and mixing thoroughly; S5, adding cationic surfactant to the mixture in step S4 Water is slowly added to the mixture after being fully mixed in the middle, and the mixture is sanded and mixed to obtain; The weight ratio of the sodium salt is 1:0.4-0.6; the molecular structural formula of the C.I. disperse red 74 dye is shown in (I): the mixed network structure formed by each active ingredient is combined with the C.I. disperse red 74 dye, And it has a strong connection with the fabric fibers to improve its color fastness.2) Prepare a suspending agent for seed coating, which is composed of the following components in mass percentage: respectively weigh the following components according to parts by weight: alkyl glycosides 1%-60%, sodium polynaphthalene formaldehyde sulfonate 1 %-60%, sulfo fatty acid polyethylene glycol ester sodium salt 1%-10%, the balance is deionized water, and the total amount of the above components is 100%. The added amount of the suspending agent in the seed coating formulation is 5%-20%. The preparation and formulation method of the suspending agent is as follows: firstly dissolving the alkyl glycoside in the aqueous solution, then adding polynaphthalene formaldehyde sulfonate sodium salt and sulfofatty acid polyethylene glycol ester sodium salt respectively in proportion, stirring evenly, and then adding them In the seed coating formulation, it can be mixed evenly with the original drug and adjuvant. The invention effectively improves the suspension rate of the seed coating agent, the suspension property and the fluidity are relatively balanced, and the long-term storage remains stable; the components of the suspending agent are safe, low in toxicity, and meet the requirements of environmental protection.3) Preparation of a fungicide for preventing and treating watermelon fusarium wilt. Made with Ethylene Glycol, Kaolin, Copper Sulfate, Barium Chloride, Zinc Sulfate, Choline Chloride and Sodium Lauryl Sulfate. The invention combines a variety of medicaments with bactericidal activity, so that the obtained bactericide has a remarkable bactericidal effect, takes effect quickly, and can produce a significant effect in 1-2 days, and adds copper sulfate, barium chloride, Zinc sulfate and choline chloride, on the one hand, enhance the efficacy of the present invention, and on the other hand, can regulate plant growth performance while sterilizing, thereby promoting the growth and reproduction of watermelon, and effectively improving the yield of watermelon.4) Prepare an anti-cracking concrete water reducing agent, which is composed of the following raw materials by weight: p-toluenesulfonic acid formaldehyde polycondensate 5-10, polynaphthalene formaldehyde sulfonate sodium salt 8-14, sodium thiosulfate 3 -5, rhodochrosite 4-8, sulfonated acetone-formaldehyde polycondensate 9-17, sodium diisobutylnaphthalene sulfonate 5-10, acrylic ribose 6-9, hemp ash 7-11, hemihydrate Fiber gypsum powder 5-8, alum stone powder 8-12, hydroxypropyl distarch phosphate 4-7. The invention adopts the auxiliary agents such as p-toluenesulfonic acid formaldehyde polycondensate, polynaphthalene formaldehyde sulfonic acid sodium salt, hemp ash, hydroxypropyl distarch phosphate and other auxiliary agents, which can effectively reduce the condensation, early shrinkage and drying of concrete. Shrinkage and self-shrinkage change, improve the crack resistance of concrete. The water-reducing agent of the invention has high water-reducing rate, strong anti-seepage, good anti-cracking effect and wide application range, and is especially suitable for major projects and emergency rescue projects.5) Preparation of a modified calcium carbonate for coating. Calcium carbonate for coating includes the following raw materials: calcium carbonate stone, higher aliphatic alcohol, triisopropylamine, muscovite, sodium polystyrene sulfonate, sodium methacrylate sulfonate, N-aminoethyl-3-aminopropyl Methyldimethoxysilane, trimethylbutylperoxysilane, sodium polynaphthalene formaldehyde sulfonate, allyl methacrylate, sodium lignosulfonate, 2-(4,6-bis(2, 4-dimethylphenyl)-1,3,5-triazine-2-yl)-5-methoxyphenol, magnesium oxide, polyisocyanate, nano-titanium dioxide, epoxy soybean oil; calcium carbonate for the coating It is prepared by calcium carbonate powder, mixed with other raw materials, dried and pulverized. The calcium carbonate prepared by the invention has the characteristics of good dispersibility, low oil absorption value, small sedimentation volume and high activation rate.6) Preparation of a green and environmentally friendly foamed concrete insulation board for roofing, characterized in that it is prepared from the following raw materials in parts by weight: 500 parts of electric furnace phosphorus slag, 80-100 parts of fly ash, and 50-100 parts of activated clay waste slag. 60 parts, 30-40 parts of calcium carbonate, 30-40 parts of glass beads, 15-20 parts of dodecyl hydroxyethyl dimethyl ammonium bromide, γ-(2,3-glycidoxy)propyl 12-15 parts of trimethoxysilane, 120-150 parts of ethanol, 20-30 parts of cement, 6-8 parts of sodium polynaphthalene sulfonate, 6-8 parts of sulfamic acid, 20-30 parts of trisilane, hydrogen carbonate 30-40 parts of ammonium, an appropriate amount of glacial acetic acid, and an appropriate amount of water. The green and environment-friendly foam concrete thermal insulation board for roofing of the present invention has the characteristics of light weight, low cost, high strength, convenient construction and installation, and outstanding thermal insulation, heat insulation and sound insulation effects....

2022-03-03

Sodium Naphthalene Sulphonate (SNF-A)

Sodium Naphthalene Formaldehyde (SNF-Superplasticizer for Concrete)INTORDUCTION:CAS Code: 36290-04-7HS Code (CN): 38244010SNF a high range water reducer, commonly referred to as a super plasticizer, also named Naphthalene Sulphonate Formaldehyde Condensate (short name: SNF, PNS, NSF, etc…)SNF is made from naphthalene, sulfuric acid, formaldehyde and liquid alkali, through sulfonation, hydrolyzation, condensation and neutralization reaction and then drying to powder. SNF-A5% contains very small chloride. Thus, it meets the requirements of chemical admixture specifications for concrete: ASTM Designation C 494 as a Type F admixture, GB8076-2008 and GB50119-2003.UsageSNF produces concrete with extremely workable characteristics referred to as high slump.SNF also allows concrete to be produced with very low water/cement ratios at low or normal slumps.SNF is ideal for use in pre stress, precast, bridge deck or any concrete where it is desired to keep the water/cement ratio to a minimum and still achieve the degree of workability necessary to provide easy placement and consolidation.SNF will also fluidize concrete, making it ideal for tremie concreting or other applications where high slumps are desired.SNF is compatible with Portland Cement, Normal Portland cement, Portland Slag Cement, Fly-ash Cement, Portland Pozzolanic Cement, etc.SPEC:Advantages:SNF produces high slump flowable concrete with no loss in strength.SNF produces low water/cement ratio concrete and therefore, high strengths.SNF in prestress/precast work, can be used to substantially reduce or eliminate the high energy requirements of external heat for accelerated curing.SNF concrete, even at high slump, exhibits no significant segregation in comparison to concrete without a super-plasticizer at the same slump.SNF aids in rapid discharge of concrete from truck mixers thereby reducing on the job time and improving mixer utilization.About Bailin Group Company for SNF production1, Free sample2,The biggest manufacturer of SNF in Asia with 9000000 MTs capacity one year.3,The raw material is also produced ourself,so we can supply the best price at best and stable quality.4,We also produce sodium gluconate,we can supply SNF and Sodium Gluconate together,in this way,you can save cost. and time5,Within 7 days delivery time after deposit.Packing:25 kgs,600 kgs,650 kgs or 700 kgs one bag with PE film inside,also based on your requirement with pallet.Shipping:Sea Transport,Railway Transport and Air Transport is all available....

2021-10-13

About Naphthalene series superplasticizer

Naphthalene series superplasticizer is a non-air-entraining superplasticizer synthesized by chemical industry. The chemical name is naphthalenesulfonate formaldehyde condensate, which has a strong dispersing effect on cement particles.Naphthalene series superplasticizerFor the preparation of large-fluid concrete, cast-in-place concrete and prefabricated components with early strength and high strength requirements, have a good use effect, can comprehensively improve and improve various properties of concrete, and are widely used in highways, bridges, dams, and ports Wharf, tunnel, electric power, water conservancy and industrial and civil construction projects, steam curing and natural curing prefabricated components, etc.On the market, the content of sodium sulfate is divided into high-concentration and low-concentration.The following are indicators of low concentration:1. Main technical indicators:1. Appearance: powder brown yellow powder, liquid brown viscous liquid.2. Solid content: powder ≥94%, liquid ≥40%3. The fluidity of the pure pulp is ≥230mm.4. Sodium sulfate content ≤10.5. Chloride ion content ≤0.5%.Performance characteristics2. Performance characteristics:1. When the concrete strength and slump are basically the same, the amount of cement can be reduced by 10-25%.2. When the water-cement ratio remains unchanged, the initial slump of the concrete is increased by more than 10cm, and the water reduction rate can reach 15-25%.3. It has significant early strength and strengthening effect on concrete, and its strength increase range is 20-60%.4. Improve the workability of concrete and comprehensively improve the physical and mechanical properties of concrete.5. Good adaptability to various cements and good compatibility with other types of concrete admixtures.6. Especially suitable for use in the following concrete projects: fluid concrete, plasticized concrete, steam-cured concrete, impermeable concrete, waterproof concrete, natural-curing precast concrete, steel and prestressed reinforced concrete, high-strength ultra-high-strength concrete .7. The slump loss of concrete is large over time, and the slump loss in half an hour is nearly 40%.3. Range of dosage:Powder: 0.75-1.5%; Liquid: 1.5-2.5%Precautions:Four, matters needing attention:1. When using porous aggregate, it is advisable to add water and stir first, and then add water reducing agent.2. When the slump is large, the vibrating time should not be too long to prevent bleeding and stratification.Naphthalene series superplasticizers can be divided into high-concentration products (Na2SO4 content <3%), medium-concentration products (Na2SO4 content 3%-10%) and low-concentration products (Na2SO4) according to the level of Na2SO4 content in their products. Content>10%). Most naphthalene-based superplasticizer synthesis plants have the ability to control the content of Na2SO4 below 3%, and some advanced companies can even control it below 0.4%.Naphthalene-based water-reducing agent is the most widely produced and most widely used high-efficiency water-reducing agent in my country (accounting for more than 70% of the amount of water-reducing agent). China,Bailin Group Co.,Ltd is one of the largest construction chemicals supplier and exporter,Naphthalene series superplasticizer (SNF) is the key product . It is characterized by a high water-reducing rate (15%-25%) and no air-entrainment. , Has little effect on setting time, has relatively good adaptability to cement, can be used in combination with various other additives, and the price is relatively cheap. Naphthalene-based water-reducing agents are often used to formulate high-fluidity, high-strength, and high-performance concrete. The slump loss of concrete mixed with naphthalene-based water-reducing agent is faster. In addition, the adaptability of naphthalene-based water-reducing agents to certain cements needs to be improved....

2021-10-13

Sodium Naphthalene Sulphonate Industrial Grade

Sodium Naphthalene Formaldehyde (SNF-Superplasticizer for Concrete)INTORDUCTION:CAS Code: 36290-04-7HS Code (CN): 38244010SNF a high range water reducer, commonly referred to as a super plasticizer, also named Naphthalene Sulphonate Formaldehyde Condensate (short name: SNF, PNS, NSF, etc…)SNF is made from naphthalene, sulfuric acid, formaldehyde and liquid alkali, through sulfonation, hydrolyzation, condensation and neutralization reaction and then drying to powder. SNF-A5% contains very small chloride. Thus, it meets the requirements of chemical admixture specifications for concrete: ASTM Designation C 494 as a Type F admixture, GB8076-2008 and GB50119-2003.UsageSNF produces concrete with extremely workable characteristics referred to as high slump.SNF also allows concrete to be produced with very low water/cement ratios at low or normal slumps.SNF is ideal for use in pre stress, precast, bridge deck or any concrete where it is desired to keep the water/cement ratio to a minimum and still achieve the degree of workability necessary to provide easy placement and consolidation.SNF will also fluidize concrete, making it ideal for tremie concreting or other applications where high slumps are desired.SNF is compatible with Portland Cement, Normal Portland cement, Portland Slag Cement, Fly-ash Cement, Portland Pozzolanic Cement, etc.SPEC:Advantages:SNF produces high slump flowable concrete with no loss in strength.SNF produces low water/cement ratio concrete and therefore, high strengths.SNF in prestress/precast work, can be used to substantially reduce or eliminate the high energy requirements of external heat for accelerated curing.SNF concrete, even at high slump, exhibits no significant segregation in comparison to concrete without a super-plasticizer at the same slump.SNF aids in rapid discharge of concrete from truck mixers thereby reducing on the job time and improving mixer utilization.About Bailin Group Company for SNF production1, Free sample2,The biggest manufacturer of SNF in Asia with 9000000 MTs capacity one year.3,The raw material is also produced ourself,so we can supply the best price at best and stable quality.4,We also produce sodium gluconate,we can supply SNF and Sodium Gluconate together,in this way,you can save cost. and time5,Within 7 days delivery time after deposit.Packing:25 kgs,600 kgs,650 kgs or 700 kgs one bag with PE film inside,also based on your requirement with pallet.Shipping:Sea Transport,Railway Transport and Air Transport is all available....

2021-10-11

Naphthalene water reducer, water reducer manufacturer,China

Naphthalene water reducer, water reducer manufacturer,China,Bailin Group Co. polycarboxylate water reducerConcrete water-reducing agent manufacturers, naphthalene-based water-reducing agent, polycarboxylate water-reducing agent powderNaphthalene-based water-reducing agent (high concentration type) is a higher-performance concrete water-reducing agent after deep processing and purification based on the production of naphthalene-based water-reducing agent. It does not contain chlorine salt, the content of sodium sulfate is less than 5%, it is non-corrosive to steel bars, non-toxic and non-polluting. In addition to having all the advantages of naphthalene-based water-reducing agents, it can avoid alkali-aggregate reactions due to high aggregate activity or concrete engineering in a humid environment, and prolong the service life of the concrete. It is a low-alkali and high-concentration non-air-entraining water-reducing agent, which has a strong dispersing and plasticizing effect on cement particles; it can be used to prepare concrete with C60 and above. It is widely used in various concrete projects such as railways, highways, bridges, hydropower, ports, wharves, industrial and civil buildings, prefabricated components, and concrete with requirements for sodium sulfate content. It enables the performance of naphthalene-based water-reducing agents to be further extended and brought into play.Product technical indicators:1. This product is harmless to humans and animals, and has a wide range of adaptability to cement.2. The dosage is 0.5~1.5% of the cementitious material, and the water reduction rate is 15~25%.3. The appearance is yellow-brown powder or brown liquid, easily soluble in water, stable chemical properties, and will not deteriorate after long-term storage.4. Under the condition of keeping the workability and strength of concrete unchanged, 15-20% of cement can be saved; under the condition of the same mix ratio, the initial slump of concrete can be increased by more than 10 cm.5. The water-reducing effect is obvious, which can improve the workability of concrete and improve the fluidity of concrete under the condition of low water-cement ratio.6. Reinforcement can increase the strength of concrete by 50-100% in 1d, 40-80% in 3d, 30-70% in 7d, and 30-60% in 28d.7. This product is low in alkali, low in sodium sulfate, effectively avoiding concrete alkali-aggregate reaction, no precipitation or crystallization at low temperature.Key points of application technology1. Strictly follow the requirements in the "Technical Specification for the Application of Concrete Admixtures".2. When using or replacing cement for the first time, adaptability test and determine the * content should be done first.3. The post-tragedy method will have better economic benefits, but the mixing time should be extended appropriately.4. It is advisable to use mechanical stirring to do a good job of maintenance.5. The dosage is calculated according to the percentage of the gelling material. If a liquid product is used, the water content will be reduced in the proportion after the solidification.[Concrete water-reducing agent manufacturer, Nai-series water-reducing agent, polycarboxylate water-reducing agent powder] Packing instructionsPackaging and storage:1. The powder product is packaged in double-layer packaging with plastic inner and outer woven, 25kg per bag; liquids are packed in plastic drums or iron drums, each drum is 50 kg, 220 kg or tank trucks, which can be adjusted at any time according to user needs.2. The powder should be stored in a dry and ventilated place. The agglomerate can be used after being crushed without affecting the use effect. It can still be used after passing the test after the expiration date.About Bailin Group:We,Bailin Group Co.,Ltd is a leading Naphthalene water reducer, Sodium Naphthalene Sulphonate (SNF-A) manufacturer and exporter in China,The annual output of Sodium Naphthalene Sulphonate (SNF-A) is more than 20,000 tons,which is the largest factory in the northeast China region.contact us if you looking for a reliable SNF factory.just send your inquiry in below form,will reply within 24hours.URL :http://www.bailincorp.comE-mail: sybailingroup@gmail.comWhatsapp/wechat :0086-13898102411...