MTW European Type Trapezium Mill
Input size:30-50mm
Capacity: 3-50t/h
LM Vertical Roller Mill
Input size:38-65mm
Capacity: 13-70t/h
Raymond Mill
Input size:20-30mm
Capacity: 0.8-9.5t/h
Sand powder vertical mill
Input size:30-55mm
Capacity: 30-900t/h
LUM series superfine vertical roller grinding mill
Input size:10-20mm
Capacity: 5-18t/h
MW Micro Powder Mill
Input size:≤20mm
Capacity: 0.5-12t/h
LM Vertical Slag Mill
Input size:38-65mm
Capacity: 7-100t/h
LM Vertical Coal Mill
Input size:≤50mm
Capacity: 5-100t/h
TGM Trapezium Mill
Input size:25-40mm
Capacity: 3-36t/h
MB5X Pendulum Roller Grinding Mill
Input size:25-55mm
Capacity: 4-100t/h
Straight-Through Centrifugal Mill
Input size:30-40mm
Capacity: 15-45t/h
Side effects of sodium thiocyanate on concrete
(PDF) Accelerating admixtures for concrete ResearchGate
2007年1月1日 • Most commercial accelerators for normal concrete consist of calcium nitrate and/or sodium thiocyanate, either as sole component or in combination • Nitrite is not a 2022年11月1日 This paper reviews different types of accelerators and discusses their effects on hydration, microstructure and properties of cementbased materials Generally, calcium and Accelerators for normal concrete: A critical review on hydration 2022年11月1日 The disadvantages of sodium thiocyanate are high cost, toxicity and potential risk of alkaliaggregate reaction (AAR) Thus, in practical application of sodium thiocyanate, it Accelerators for normal concrete: A critical review on hydration However, in a paper published in the November 1989 issue of Concrete International2 it was shown that thiocyanatebased admixtures are safe for use in reinforced concrete even well Concrete Technology Update
EFFECTS OF ACCELERATING ADMIXTURES ON CEMENT
Results generally agreed with the known effects of the three admixtures in site practice with the calcium chloride being effective at all ages, the calcium nitrate at early ages and the sodium Portland cement concrete is durable in most natural environments; however, concrete is sometimes used in areas where it is exposed to substances that can attack and deteriorate it Effects of Substances on Concrete and Guide to Protective Alkali activation with sodium silicate and sodium hydroxide is common and effective, but these activators can be costly and are generally unsafe to handle; current research is focused on The impact of accelerating admixtures on blended cement 2024年1月1日 This paper summarizes the effects of different polymers on the hydration of cement and the properties of concrete/mortar Studies have established that the incorporation of polymers as a workability enhancing Effects of Polymers on Cement Hydration and
ACI 2123R10 Report on Chemical Admixtures for Concrete
Chemical admixtures, which are primarily watersoluble substances, are discussed in detail and, in this report, are classified into 13 groups: airentraining; accelerating; waterreducing and set 2001年3月1日 Also the migration of the hydration accelerator, thiocyanate, and airentraining agents like tall oils (resin acids) or NPEO (used to introduce small air bubbles in concrete and increase Leaching of Concrete Admixtures Containing Thiocyanate and 1994年4月1日 An experimental program is described which was designed to evaluate the corrosion characteristics of reinforcing steel in concrete containing a sodium thiocyanatebased admixture at dosages of 60, 90, and 120 fl oz/cwt A summary of the macrocell corrosion data obtained from this evaluation is tabulated Study results suggest that the concrete mixtures CORROSION EVALUATION OF A SODIUM THIOCYANATEBASED ADMIXTUREleaching of thiocyanate is also very high in absolute figures: 141,6 mg/ kg concrete Thiocyanate seems to be very easily soluble in water, which can be the reason behind this behaviour It is also very clear that thiocyanate is not firmly bound to the cement matrix 0% 10% 20% 30% 40% 50% 60% 70% 80% Percentage leached amount A AEA 1A AEA 2 Longterm leaching of environmentally hazardous substances
(PDF) The Effect of Calcium Chloride Admixture on the Compressive
2021年1月1日 This paper reviews the most important mechanical and chemical effects of calcium chloride on concrete mixtures, its effects on reinforcement corrosion, the conditions of its use, and its mechanism 57—Effects on hardened concrete 58—Corrosion of metals 59—Quality assurance 510—Batching 511—Storage Chapter 6—Waterreducing and setretarding admixtures, p 16 61—Introduction 62—Materials 63—Selection and evaluation 64—Applications 65—Dosage 66—Proportioning concrete 67—Effects on fresh and hardening ACI 2123R10 Report on Chemical Admixtures for ConcreteAbstract Thiocyanate (SCN) functions in host defense as part of the secreted lactoperoxidase (LPO) microbicidal pathway SCN is the preferred substrate for LPOdriven catalytic reduction of hydrogen peroxide (H 2 O 2) forming hypothiocyanous acid (HOSCN)HOSCN is selectively generated by many peroxidase enzymes that can utilize SCN including: eosinophil peroxidase THIOCYANATE: A potentially useful therapeutic agent with host Title: Sodium Thiocyanate and Corrosion of Steel in Concrete and Mortar Author(s): Charles K Nmai and Jack M Corbo Publication: Concrete International Volume: 11 Issue: 11 Appears on pages(s): 5967 Keywords: accelerating agents; admixtures; calcium chlorides; calcium nitrate; corrosion; reinforced concrete; sodium thiocyanates; Materials Research DOI:Sodium Thiocyanate and Corrosion of Steel in Concrete and
The impact of sodium thiocyanate and trimethylamine on
2018年10月24日 The impact of sodium thiocyanate and trimethylamine on selected physical and mechanical characteristics of cement mortars which results in the effects not always consistent with the „Cold Weather ConcretingAdmixtures” Cement and Concrete Composites 20: 121 – 128 PNB06250:1988: Beton zwykły PNEN 1961:2006 1995年10月15日 It is the most effective thiocyanate for increasing strengths at low temperatures After 28 days of curing at −5°C, the cement paste with 3% calcium thiocyanate attains a strength that is 74% of the strength of cement paste cured at 20°C Sodium thiocyanate is also an effective accelerator and increases strength at low temperaturesThe effect of thiocyanates on the hydration of portland cement 2015年1月1日 The corrosion inhibition effect and mechanism of Dsodium gluconate for reinforcing steel in the simulated concrete pore solution containing Cl were studied by electrochemical techniques Corrosion Inhibition Effect of Dsodium Gluconate on Reinforcing 2006年4月1日 The quality of mixing and curing water plays a vital role in production and application of concrete In the present study, the effect of strong alkaline substances like sodium carbonate (Na2CO3 Influence of strong alkaline substances (sodium
Sodium Thiosulfate: Uses, Warnings, Side Effects, Dosage
Sodium thiosulfate is a medication used as an antidote to cyanide poisoning Common side effects of sodium thiosulfate include nausea, vomiting, headache, low blood pressure (hypotension), salty taste in the mouth, warm sensation over the body, prolonged bleeding time, hypersensitivity reactions, local irritation, and contact dermatitis Consult your doctor if Three commercially used accelerating materials, calcium chloride, calcium nitrate and sodium thiocyanate, were studied for their effects on the hydration of a particular ordinary Portland cement Testing was carried out at equal weight percentage levels on cement pastes at a water:cement ratio of 050 Test procedures used were Xray diffraction, differential scanning EFFECTS OF ACCELERATING ADMIXTURES ON CEMENT 2015年12月15日 The effect of calcium nitrate on technological characteristics of concrete mixture (the consistency of the mixture, the density, and the amount of air in the mixture), on early concrete strength (PDF) Effect of Calcium Nitrate, Triethanolamine and 2022年2月15日 Concrete mixed with calcium chloride has more of a tendency toward future damage than concrete without this chemical The chloride can cause the mix to shrink as it cures, creating cracks in the surface There is also an increased risk of scaling in concrete made with chloride accelerators, Disadvantages of Using a Calcium Chloride Concrete Accelerator
Uses of Sodium Thiocyanate in the Construction Industry
2023年9月20日 While its role as an accelerating agent for concrete is the most prominent, sodium thiocyanate can also be used in other minor applications within the construction industry These include its use in certain types of adhesives and sealants and as a corrosion inhibitor Beyond Construction The utility of sodium thiocyanate extends beyond Sodium thiocyanate NaCNS or NaSCN or CNNaS CID structure, chemical names, cement, concrete, lime, gypsum, and other nonmetallic mineral product manufacturing) Not Known or Reasonably Ascertainable ; Plastics Material and Resin Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long Sodium thiocyanate NaCNS CID PubChem2019年3月13日 Altaf Ahmad, Ranveer Kumar, Anil Kumar, (2019) "Effect of sodium molybdate and sodium tungstate in concrete rebar corrosion", AntiCorrosion Methods and Materials, https: (PDF) Effect of sodium molybdate and sodium tungstate in concrete rebar 2017年1月9日 The results showed that, under low dose conditions (≤ 005 wt%), sodium thiocyanate, (SEM) observations also helped to explain the effect of Urea on concrete under cold weather conditionsInfluence of lowdose chemicals on the early strength of Portland
Technical Review of Calcium Nitrite Corrosion Inhibitor in Concrete
Treadaway and Russell (6) studied sodium nitrite and sodium benzoate Craig and Wood (7) studied potassium chromate, sodium benzoate, and sodium nitrite These papers and others agreed that sodium nitrite offered the best pro tection for concrete from chlorideinduced corrosion but that the strength of the concrete was reduced when any of theseSodium thiocyanate was introduced as a drug treatment for hypertension by Treupel and Edinger 47 in 1900 and later by Hines in 1946 48 It was not very effective in 3 of them in the malignant phase of the disease 45 Because of disturbing side effects, the drug was not acceptable for clinical use However, it lowered blood pressure and Thiocyanate Sodium an overview ScienceDirect Topicsof corrosion by sodium thiocyanate lies between 075 and 10% by mass of cement, and concluded that the use of sodium thiocyanatebased accelerating admixtures is safe for reinforced concrete applications up to these concentrations Typical dosages of accelerating admixtures containing sodium thiocyanateConcrete Technology Updateunique effects on concrete properties Common examples include starch, ligninbased compounds, surfactants, etc While chemical admixtures have been a mainstay in the concrete industry for decades, research is always progressing and improvements to their use are still an important topic in contemporary literatureThe impact of accelerating admixtures on blended cement
The effect of thiocyanates on the hydration of portland cement
1995年10月15日 Rear and Chin [5] found that at 10°C, concrete containing sodium thiocyanate had higher strengths than that of the reference Brook et al [6, 7] have provided data on the effect of coldweather admixtures on strengths Some work has also been reported on the effect of sodium thiocyanate on the corrosion of reinforced steel 18, 9]2022年11月1日 This paper presents the chemical composition of accelerators available for normal concrete Their effects on hydration, Inorganic salts of nitrate and thiocyanate are the most commonly used chemicals in Characteristics of alkalisilica reaction in the presence of sodium and calcium chloride Cement Concr Res (1990)Accelerators for normal concrete: A critical review on hydration 2024年1月10日 Sodium thiosulfate and sodium nitrite are medications used as antidotes to treat acute cyanide poisoning Common side effects of sodium nitrite include low blood pressure, fainting, rapid heartbeat, palpitations, shortness of breath, headache, dizziness, blurred vision, and others Common side effects of sodium thiosulfate include hypotension, warm sensation in Sodium Thiosulfate/Sodium Nitrite: Cyanide Poisoning Uses2022年9月1日 Accelerators for normal concrete play an important role in some engineering constructions This paper reviews different types of accelerators and discusses their effects on hydration Accelerators for normal concrete: A critical review on hydration
Effects of sodium carbonate admixture and mix design ratios on
2023年8月11日 Carbonates and bicarbonates are two groups of accelerators which can be used in sprayed concrete In this study, the effects of the two accelerators sodium carbonate (Na₂CO₃) and sodium 2022年1月1日 Both sodium carbonate (NC) and sodium phosphate (NP) could immediately precipitate in the presence of calcium ions (Ca 2+), and these precipitates would deposit on the surface of cement as one layer in cement pasteHowever, these precipitates have different effects on the hydration of cement In this study, effect of NC and NP on cement hydration was Effect of sodium carbonate and sodium phosphate on hydration 2019年12月19日 The effect of sodium aluminate activator on properties of the Portlandcomposite cement (clinker factor 65 %) was studied and the results are being discussedThe effect of sodium aluminate on the properties of the2001年3月1日 Also the migration of the hydration accelerator, thiocyanate, and airentraining agents like tall oils (resin acids) or NPEO (used to introduce small air bubbles in concrete and increase Leaching of Concrete Admixtures Containing Thiocyanate and
CORROSION EVALUATION OF A SODIUM THIOCYANATEBASED ADMIXTURE
1994年4月1日 An experimental program is described which was designed to evaluate the corrosion characteristics of reinforcing steel in concrete containing a sodium thiocyanatebased admixture at dosages of 60, 90, and 120 fl oz/cwt A summary of the macrocell corrosion data obtained from this evaluation is tabulated Study results suggest that the concrete mixtures leaching of thiocyanate is also very high in absolute figures: 141,6 mg/ kg concrete Thiocyanate seems to be very easily soluble in water, which can be the reason behind this behaviour It is also very clear that thiocyanate is not firmly bound to the cement matrix 0% 10% 20% 30% 40% 50% 60% 70% 80% Percentage leached amount A AEA 1A AEA 2 Longterm leaching of environmentally hazardous substances 2021年1月1日 This paper reviews the most important mechanical and chemical effects of calcium chloride on concrete mixtures, its effects on reinforcement corrosion, the conditions of its use, and its mechanism (PDF) The Effect of Calcium Chloride Admixture on the Compressive 57—Effects on hardened concrete 58—Corrosion of metals 59—Quality assurance 510—Batching 511—Storage Chapter 6—Waterreducing and setretarding admixtures, p 16 61—Introduction 62—Materials 63—Selection and evaluation 64—Applications 65—Dosage 66—Proportioning concrete 67—Effects on fresh and hardening ACI 2123R10 Report on Chemical Admixtures for Concrete
THIOCYANATE: A potentially useful therapeutic agent with host
Abstract Thiocyanate (SCN) functions in host defense as part of the secreted lactoperoxidase (LPO) microbicidal pathway SCN is the preferred substrate for LPOdriven catalytic reduction of hydrogen peroxide (H 2 O 2) forming hypothiocyanous acid (HOSCN)HOSCN is selectively generated by many peroxidase enzymes that can utilize SCN including: eosinophil peroxidase Title: Sodium Thiocyanate and Corrosion of Steel in Concrete and Mortar Author(s): Charles K Nmai and Jack M Corbo Publication: Concrete International Volume: 11 Issue: 11 Appears on pages(s): 5967 Keywords: accelerating agents; admixtures; calcium chlorides; calcium nitrate; corrosion; reinforced concrete; sodium thiocyanates; Materials Research DOI:Sodium Thiocyanate and Corrosion of Steel in Concrete and 2018年10月24日 The impact of sodium thiocyanate and trimethylamine on selected physical and mechanical characteristics of cement mortars which results in the effects not always consistent with the „Cold Weather ConcretingAdmixtures” Cement and Concrete Composites 20: 121 – 128 PNB06250:1988: Beton zwykły PNEN 1961:2006 The impact of sodium thiocyanate and trimethylamine on 1995年10月15日 It is the most effective thiocyanate for increasing strengths at low temperatures After 28 days of curing at −5°C, the cement paste with 3% calcium thiocyanate attains a strength that is 74% of the strength of cement paste cured at 20°C Sodium thiocyanate is also an effective accelerator and increases strength at low temperaturesThe effect of thiocyanates on the hydration of portland cement
Corrosion Inhibition Effect of Dsodium Gluconate on Reinforcing
2015年1月1日 The corrosion inhibition effect and mechanism of Dsodium gluconate for reinforcing steel in the simulated concrete pore solution containing Cl were studied by electrochemical techniques