Mix Ratio Design and Performance Optimization of Vitrified Microsphere Insulating Mortar

2012 ◽  
Vol 476-478 ◽  
pp. 1639-1642
Author(s):  
Jin Ping Chen
Keyword(s):  
Performance Optimization ◽  
Raw Materials ◽  
Orthogonal Experiment ◽  
Polypropylene Fiber ◽  
Physical And Mechanical Properties ◽  
Dry Density ◽  
Building Insulation ◽  
Composition Materials ◽  
New Type ◽  
And Performance

Vitrified microsphere insulation mortar is a new type building insulation mortar which developed in recent years, with having the advantages of well workability, high intensity and fire prevention. But because the vitrified microsphere we use of which much exists on the defects of high dry density and bad insulation effect, it analyzed deeply kinds of factors which influence on the physical and mechanical properties of vitrified microsphere insulation mortar, making use of orthogonal experiment to optimize the composition materials of insulation mortar. The orthogonal test results show that the most influential raw materials factors to mortar insulation properties and 28d compressive strength followed by aggregate, polypropylene fiber, fly ash and latex powder.

Synthetic Technology and Performance of a Novel Fatty Alcohol Polyoxyethylene Carboxylate Surfactants

2011 ◽  
Vol 298 ◽  
pp. 163-168 ◽  
Author(s):  
Yuan Yuan Lei ◽  
Guo Zheng ◽  
Yu Sun ◽  
Yong Zhou
Keyword(s):  
Reaction Time ◽  
Optimum Condition ◽  
Sodium Hydroxide ◽  
Fatty Alcohol ◽  
Succinic Anhydride ◽  
Foam Stability ◽  
Raw Materials ◽  
Molar Ratio ◽  
New Type ◽  
And Performance

In this paper, with fatty alcohol polyoxyethylene (AEO9), succinic anhydride (SA) and sodium hydroxide as raw materials, a new type of fatty alcohol polyoxyethylene carboxylate surfactants (SAE9C-Na) was obtained by esterification and neutralizing effect. The influencing factors were researched and its surface properties were studied. The optimum condition of synthesis was determined: molar ratio of alcohol to acid was 1:1.1, reaction temperature was 85°C, reaction time was 60 min, under this condition, the yield could reach up to 95.8%. The results received from this experiment showed that SAE9C-Na had excellent surface activity and foaming and foam stability, whose emulsification and solubility enhancement were improved greatly.

scholarly journals Preparation and Performance Optimization of Original Aluminum Ash Coating Based on Plasma Spraying

Coatings ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 770 ◽  
Author(s):  
Hongjun Ni ◽  
Jiaqiao Zhang ◽  
Shuaishuai Lv ◽  
Xingxing Wang ◽  
Yu Zhu ◽  
...  
Keyword(s):  
Plasma Spraying ◽  
Plasma Spray ◽  
Performance Optimization ◽  
Gas Flow ◽  
Orthogonal Experiment ◽  
Angle Of Repose ◽  
Spray Parameters ◽  
Coating Properties ◽  
Industrial Solid Waste ◽  
And Performance

As an industrial solid waste, the original aluminum ash (OAA) will cause serious pollution to the air and soil. How to reuse the OAA has been a research difficulty. Thus, a method of preparing a plasma spray powder using OAA is proposed. The OAA was hydrolyzed and ball milled, and the flowability of original aluminum ash spray powder (OAASP) was evaluated by the angle of repose. The coating properties were determined via analyzing the microstructure and the phase of the coating, and the effects of plasma spray parameters on the coating properties were investigated by the orthogonal experiment to optimize spray parameters. The results show that the angle of repose of OAASP after granulation was less than 40°, which met the requirements of plasma spraying. When the spraying current was 600 A, the spraying voltage was 60 V, the main gas flow was 33 slpm, and the powder flow rate was 22 g/min, and the prepared original aluminum ash coating (OAAC) had excellent comprehensive performance. After the spraying process parameters were optimized, the microhardness of the coating was 606.54 HV, which is about twice the hardness of the substrate; the abrasion rate was 12.86 × 10−3 g/min; the porosity was 0.16%; and the adhesive strength was 16 MPa. When the amount of Al2O3 added was 50%, the hardness of the coating was increased by 17.61%.

scholarly journals Verification of the effect of Raw Materials Mill Dust on soil stabilization: An experimental study

2020 ◽  
Vol 9 (1) ◽  
pp. 172-177
Keyword(s):  
Soil Stabilization ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Dry Weight ◽  
Plasticity Index ◽  
Cement Kiln ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Pavement Maintenance ◽  
Optimum Water Content

Cement plants produce large quantities of dust, which is an important source of pollution. Among these pollutants is raw materials mill dust (RMMD), it is a dust produced during the grinding of raw materials. RMMD differs in chemical composition from cement kiln dust (CKD), where CKD is a by-product that collects in the electrostatic filters of a cement kiln. A lot of studies have been done around the world to find effective ways to recycle CKD and use it again in soil stabilization to avoid the failure of the entire pavement in the future as well as an economical and environmental solution, while there is a dearth of research done on RMMD. In this study, the performance of a weak subgrade for one of the sites in Aleppo city was examined, where its physical and mechanical properties (plasticity index, maximum dry density, optimum water content, and California bearing ratio (CBR)), were determined. Then RMMD was added to the subgrade samples according to five ratios 0, 5, 10, 15, and 20% of the dry weight of the soil. The research concluded that adding the RMMD to the weak subgrade by 20% of its dry weight is the optimal ratio, improved its performance, as the plasticity index decreased by 13%, and the CBR increased up to 63 %. Thus, the bearing capacity increases, it saves costs and reduces future pavement maintenance.

The Preparation and Performance of Biomass Cushioning Packaging Material Prepared by Sunflower Stalk Pith

2010 ◽  
Vol 113-116 ◽  
pp. 1468-1471
Author(s):  
Jun You Shi ◽  
Gu Yue Wang
Keyword(s):  
Raw Materials ◽  
Maximum Modulus ◽  
Modulus Of Rupture ◽  
Packaging Materials ◽  
Molding Process ◽  
Static Compression ◽  
Material Density ◽  
New Type ◽  
And Performance ◽  
The Comparative Study

The biomass cushioning packaging materials was prepared using sunflower stalk pith residue as raw materials. The systemic researches of the material performances were conducted by comparing the foamed polystyrene (EPS) materials according to A method of GB/T8618-1987 static compression test of the comparative study of cushioning performance. Using the material density, the adhesive selection and the foam agent modification as main factors, and the cushioning properties as index, the molding process was optimized. Meanwhile the mechanical properties were also investigated. The results showed that the material, with minimum cushioning coefficient of 3.6 and maximum modulus of rupture (MOR) of 12.56 Mpa, exhibited excellent performance of protecting, which could substitute the petrochemical products as a new type biomass cushioning packaging materials.

Synthetic and Performance Research on the New Type Hydrogel with Acrylic Acid and Acrylamide Unit

2013 ◽  
Vol 864-867 ◽  
pp. 690-693
Author(s):  
Wu Zhang ◽  
Lina Hou ◽  
Ling Li ◽  
Yun Dong Fang ◽  
Chun Zheng Song ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Sodium Sulfite ◽  
Orthogonal Experiment ◽  
Gel Strength ◽  
Molar Ratio ◽  
Water Absorbency ◽  
New Type ◽  
And Performance ◽  
Optimized Conditions ◽  
Performance Research

High acrylamide content hydrogel was synthesized under mild condition through a copolymerization reaction between acrylic acid (AA) and acrylamide (AM) using N, N-methylenebis-acrylamide as crosslinker and potassium persulfate combination with sodium sulfite as initiator in aqueous solution. The factors with influence on water absorbency performance including molar ratio of AM to AA, neutralization degree, content of crosslinker and initiator were investigated. Further orthogonal experiment with four factors and three levels were employed to determine the optimized conditions, in which not only water absorbency but also gel strength was taken into account.

The Lightweight Porous Fine Aggregate Composite Based on Secondary Raw Materials

2019 ◽  
Vol 799 ◽  
pp. 153-158
Author(s):  
Dainius Leonavičius ◽  
Ina Pundienė ◽  
Modestas Kligys ◽  
Jolanta Pranckevičienė
Keyword(s):  
Cement Paste ◽  
Thermal Conductivity Coefficient ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Expanded Polystyrene ◽  
Dry Density ◽  
Fine Aggregate ◽  
Fine Aggregates ◽  
Glass Aggregate ◽  
Foamed Glass

The main objective of this study was to carry out more detailed research on the effects of the amount of cement paste on the physical and mechanical properties of porous fine aggregate concrete (PFAC). Fine foamed glass aggregate (prepared of local glass breaks) and crushed expanded polystyrene aggregate (prepared of local packing tare of household equipment), ordinary Portland cement (OPC), plasticizing and air entraining admixtures, as well as pozzolanic additive – metakaolin-based waste (local waste in production process of foamed glass aggregate), were used for the preparation of forming mixtures. Fine aggregates were coated by an extremely thin layer of porous cement paste in the samples with the lowest amount of OPC (70 kg/m3), and the aggregates contact with each other mainly at the points (empty spaces between the aggregates are interconnected between each other). There were no empty spaces between the aggregates observed, and porous cement paste seems to be monolithic in the samples with the highest amount of OPC (370 kg/m3). Increased amount of OPC (from 70 to 370 kg/m3) results in denser structure, increased dry density, compressive strength, thermal conductivity coefficient and decreased water absorption of the samples.

scholarly journals Study on Foamed Concrete Used as Gas Isolation Material in the Coal Mine Goaf

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4377
Author(s):  
Changyu Xu ◽  
Lijun Han ◽  
Maolin Tian ◽  
Yajie Wang ◽  
Yuhao Jin
Keyword(s):  
Coal Mine ◽  
Gas Permeability ◽  
Orthogonal Experiment ◽  
Dry Density ◽  
Gas Concentration ◽  
Convection Diffusion ◽  
Engineering Requirement ◽  
Foamed Concrete ◽  
New Type ◽  
Sealing Materials

In view of the serious threat of gas accumulation in the coal mine goaf and the limitations of the existing gas sealing materials, the orthogonal experiment was developed to study a new type of foamed concrete for mine gas sealing. Dry density, gas permeability, and compressive strength were studied as the material indicators according to the demands of the gas isolation material in the coal mine goaf, and the experimental results showed that foam content was the most important factor. Meanwhile, the optimum mix was selected according to the influence of foam content as well as the engineering requirement. Then two application modes of this foamed concrete for goaf gas isolation were put forward, after which the convection-diffusion model of gas was built by COMSOL Multiphysics (COMSOL Inc., Stockholm, Sweden) to reveal the mechanism of different application modes using the parameters of the new foamed concrete. Simulation results showed that this foamed concrete used as isolating material for goaf gas could significantly decrease the gas concentration in workface, which can provide a reference for similar engineering.

scholarly journals The yield of washed fiber and performance indicators in young rams of the taurian type askanian fine fleece breed

2021 ◽  
Author(s):  
N. M. Korbych ◽  
Keyword(s):  
Raw Materials ◽  
Live Weight ◽  
Physical And Mechanical Properties ◽  
High Yield ◽  
Breeding Work ◽  
Fiber Yield ◽  
And Performance ◽  
High Yields ◽  
Meat Productivity ◽  
Selection Breeding

Under market conditions, the increase in wool and lamb production should not only increase the livestock number, but also increase its productivity. The significant reserve is also to improve the quality of raw materials produced. The aim of the research was to identify the features of wool and meat productivity in young rams of the Taurian type Askanian fine fleece breed the taking into account an in-depth assessment of the washed fiber yield and subsequent use of the obtained data in the selection-breeding work with sheep. The young rams of the Taurian type Askanian fine fleece breed were used for research. The formed groups were characterized by low, medium and high yield of washed fiber. The results of the studies showed an advantage in all research parameters in young rams with an average yield of washed fiber. Therefore, it is proposed to direct the selection-breeding work to improve live weight and physical and mechanical properties of wool in young rams with high yields of washed fiber (more than 60.1%), which will allow to obtain more profits not only from the wool sale but from the sale of mutton, and to reject lambs with a low washed fiber yield to prevent the transmission of this trait to their offspring.

scholarly journals Laboratory experimental study on red mud geopolymer used as road subgrade materials

2021 ◽  
Vol 261 ◽  
pp. 02043
Author(s):  
Lusheng Qin ◽  
Qingke Nie ◽  
Haiqing Zhang ◽  
Xiangxin Jia ◽  
Chuanchuan Zhang
Keyword(s):  
Red Mud ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Strength Loss ◽  
Industrial Wastes ◽  
Utilization Rate ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Filling Materials ◽  
Cbr Test

Red mud is a strong alkaline waste discharged from the process of alumina extraction, which is harmful to the environment and its utilization rate is always low. One of the effective ways to utilize red mud is used as road subgrade material. In this paper, the industrial wastes including red mud, fly ash, slag, and desulfurized gypsum are used as basic raw materials to prepare subgrade filling materials. A series of laboratory tests, such as compaction test, California Bearing Ratio (CBR) test (soaked and non-soaked conditions) and permeability test, are carried out. The physical and mechanical properties, such as maximum dry density, optimum moisture content, CBR value, expansion, permeability coefficient and soaked strength loss rate, of the mixtures with different proportions, were studied. The results can provide reference for the selection of the best proportion scheme and promote the utilization of red mud in subgrade engineering.

MATHEMATICAL MODELING OF OPTIMIZED RECEPTURAL OF LOW-LACTOSE SYNBIOTIC YOGHOURT ICE CREAM

2020 ◽  
Vol 11 (2) ◽  
pp. 73-82
Author(s):  
А. Trubnikova ◽  
О. Chabanova ◽  
S. Bondar ◽  
Т. Sharakhmatova ◽  
Т. Nedobijchuk
Keyword(s):  
Concentration Factor ◽  
Raw Materials ◽  
Ice Cream ◽  
Test Sample ◽  
Protein Concentrate ◽  
Important Indicator ◽  
Free Protein ◽  
Mass Fractions ◽  
New Type ◽  
Main Components

Optimization of the formulation of synbiotic yogurt ice cream low-lactose using lactose-free protein concentrate of buttermilk and yogurt with low lactose content is the goal of expanding the range of low-lactose dairy products and improving the functional and health properties of ice cream. Low-lactose ice cream formulation optimization was performed using a gradient numerical method, namely conjugated gradients (Conjugate Gradient). The optimization algorithm is implemented in Mathcad. An array of data with a set of indicators for the choice of a rational ratio of lactose-free protein concentrate of buttermilk and yogurt base and inulin content for ice cream mixtures is presented. The influence of the ratio of the main components of the mixtures on the foaming ability, which determines the quality of the finished product, has been studied. An important indicator is taken into account - the concentration factor of buttermilk, which is additionally purified from lactose by diafiltration. The graphic material presented in the work clearly demonstrates that the rational ratio of yogurt base and lactose-free protein concentrate of buttermilk, obtained by ultrafiltration with diafiltration purification at a concentration factor of FC = 5 is 40.6: 59.4. The content of additional components included in the recipe of a new type of ice cream is optimized in the work, the mass fractions of which were: inulin - 3.69 %; lactulose – 1 %; ginger - 0.3 %; citric acid - 0.15 %; stabilization system - 0.2 %. The chemical composition and quality indicators of the mixture for ice cream low-lactose synbiotic yogurt, consisting of raw materials in the optimal ratio, were determined. The lactose content in the test sample of the ice cream mixture was 0.99%, the antioxidant activity was 3.1 times higher than in the mixture for traditional yogurt ice cream. The most likely number of lactic acid microorganisms, CFU / cm3 is (2.8 ± 0.9) · 108, the number of bifidobacteria, CFU / cm3 is (2.5 ± 0.2) · 109. The results of the research will be implemented in dairy companies in the production of ice cream.

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