Device Design of Hot-Air Curing and Study on the Properties of Hot-Air Cured Phosphate Sand

2014 ◽  
Vol 576 ◽  
pp. 167-170
Author(s):  
Lu Xia ◽  
Wei Long ◽  
Jin Huang ◽  
You Shou Zhang
Keyword(s):  
Compressive Strength ◽  
Fracture Surface ◽  
Fracture Mode ◽  
Assembly Line ◽  
Design Principle ◽  
High Humidity ◽  
Device Design ◽  
Adhesive Fracture ◽  
Hot Air ◽  
Sand Molding

A set of hot-air curing device for phosphate sand was designed, processed and assembled, samples were made by the device, and their properties were studied. Result shows that design principle of the device is correct, hot-air remains stable; Phosphate sand can be hardened by blowing hot-air, it is suitable to assembly line like clay sand molding line because of short blowing time, for φ30mm×30mm sample, suitable blowing time is 15s when blowing temperature is 200°C,its dry compressive strength is up to 2.1MPa; The sample is not suitable for storage, because storage strength is declined sharply with high humidity although it is improved slightly with falling humidity; Compare to no-bake phosphate sand and heat-cured phosphate sand, crack on fracture surface of hot-air cured phosphate sand is invisible nearly, but fracture mode is adhesive fracture mainly, so its dry compressive strength is lower slightly.

Fracture mode and compressive strength of ice-templated porous zirconia

2021 ◽  
Author(s):  
Jinzhu Zou ◽  
Huiwen Xiong ◽  
Yujuan Huang ◽  
Kechao Zhou ◽  
Dou Zhang
Keyword(s):  
Compressive Strength ◽  
Fracture Mode ◽  
Porous Zirconia

scholarly journals The Effect of Polymer Waste Addition on the Compressive Strength and Water Absorption of Geopolymer Ceramics

2021 ◽  
Vol 11 (8) ◽  
pp. 3540
Author(s):  
Numfor Linda Bih ◽  
Assia Aboubakar Mahamat ◽  
Jechonias Bidossèssi Hounkpè ◽  
Peter Azikiwe Onwualu ◽  
Emmanuel E. Boakye
Keyword(s):  
Public Health ◽  
Compressive Strength ◽  
Fracture Surface ◽  
Water Absorption ◽  
Chemical Bonding ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Polymer Waste ◽  
Pull Out

The quantity of polymer waste in our communities is increasing significantly. It is therefore necessary to consider reuse or recycling waste to avoid an increase in the risk to public health. This project is aimed at using pulverized low-density polyethylene (LDPE) waste as a source to reinforce and improve compressive strength, and to reduce the water absorption of geopolymer ceramics (GC). Clay:LDPE composition consisting of 5%, 10%, and 15% LDPE was geopolymerized with an NaOH/Na2SiO3 solution and cured at 30 °C and 50 °C. Characterization of the geopolymer samples was carried out using XRF and XRD. The microstructure was analyzed by SEM and chemical bonding by FTIR. The SEM micrographs showed LDPE particle pull-out on the geopolymer ceramics’ fracture surface. The result showed that the compressive strength increases with the addition of pulverized polymer waste compared to the controlled without LDPE addition. Water absorption decreased with an increase in LDPE addition in the geopolymer ceramics composite.

Performance of Nano-Silica Insulation Material Enhanced by High Humidity-Reinforcement Method

2016 ◽  
Vol 697 ◽  
pp. 433-436
Author(s):  
Shi Chao Zhang ◽  
Yu Feng Chen ◽  
Wei Wu ◽  
Hao Ran Sun ◽  
Guang Hai Wang ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Raw Material ◽  
High Humidity ◽  
Insulation Material ◽  
Condensation Polymerization ◽  
Drying Process ◽  
Nano Silica ◽  
Insulation Materials ◽  
The One ◽  
Strength Improvement

In this paper, fumed nano-silica as the main raw material, nano-silica insulation materials were prepared by the dry processing. Research on humidity-reinforcement of nano-Silica insulation materials has been carried out and analyzed. When hygroscopicity of samples reach to 23%, the compressive strength 1.65MPa is at twice the one without high humidity-reinforcement, while the thermal conductivities are almost the same. Then, the action mechanism of high humidity-reinforcement method was analyzed. In humidity-reinforcement method, as vapor enters, silica sol is formed in the gap between one aggregate particle and another, and various condensation polymerization occurred in the drying process, which lead to aggregates connection and compressive strength improvement.

Preparation and Characterization of CCCW/Foamed Concrete Composite

2011 ◽  
Vol 261-263 ◽  
pp. 13-18
Author(s):  
Ke Qing Li ◽  
De Ping Chen ◽  
Shi Li Zhang ◽  
Bao Shun Liu
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Water Absorption ◽  
Heat Insulation ◽  
High Humidity ◽  
Underground Engineering ◽  
New Approach ◽  
Foamed Concrete ◽  
Insulation Performance

Aimed at improving the waterproofing property of foamed concrete, a heat-insulating and waterproofing composite applied in underground engineering was prepared by using cementitious capillary crystalline waterproofing material and foamed concrete. The properties of foamed concrete and composite such as compressive strength, water absorption and thermal conductivity were tested and contrasted, and the compounding reaction mechanism was analyzed. The results show that, compared with foamed concrete, the water absorption of composite has been significantly reduced while the heat-insulating property of foamed concrete is maintained and the overall waterproofing and heat-insulation performance has been significantly improved. A new approach solving underground heat-harm such as high temperature and high humidity is provided.

Discuss of Bonding Mechanism of Al-Phosphate No-Bake Sand

2012 ◽  
Vol 472-475 ◽  
pp. 605-608
Author(s):  
Lu Xia ◽  
You Shou Zhang ◽  
Jin Huang
Keyword(s):  
Fracture Mode ◽  
Phosphate Binder ◽  
Phosphate Binders ◽  
Bonding Mechanism ◽  
Cohesive Fracture ◽  
Adhesive Fracture ◽  
Sand Surface

Adding B-ion additive or Mg-ion additive to Al-phosphate binder to get different binders, and viscosity of Al-phosphate binders and dry strength of their no-bake sand were tested, bonding mechanism among sands of Al-phosphate no-bake sand was discussed by SEM and EDS. Results indicate that Mg-ion additive can increase binder’s viscosity and dry strength of its no-bake sand more obviously than B-ion additive, adding Mg-ion additive and B-ion additive simultaneously is more obvious. Location crack produced is changed from sand surface to binding bridge inner while adding Mg-ion additive and B-ion additive simultaneously ,and fracture mode is changed from adhesive fracture mainly to cohesive fracture mainly, dry strength is improved from 0.86MPa to 2.38MPa.

Effect of high-humidity hot air impingement blanching (HHAIB) on drying and quality of red pepper (Capsicum annuum L.)

2017 ◽  
Vol 220 ◽  
pp. 145-152 ◽  
Author(s):  
Jun Wang ◽  
Xiao-Ming Fang ◽  
A.S. Mujumdar ◽  
Jing-Ya Qian ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Capsicum Annuum ◽  
Red Pepper ◽  
High Humidity ◽  
Capsicum Annuum L ◽  
Hot Air ◽  
Air Impingement

Effect of hot air disinfestation treatment in combination with simulated air freight conditions on quality of 'Kensington' mango (Mangifera indica Linn.

1996 ◽  
Vol 36 (6) ◽  
pp. 739 ◽  
Author(s):  
KK Jacobi ◽  
LS Wong ◽  
JE Giles
Keyword(s):  
Surface Temperature ◽  
Fruit Quality ◽  
Mangifera Indica ◽  
Storage Conditions ◽  
Control Treatment ◽  
High Humidity ◽  
C Storage ◽  
Hot Air ◽  
And Storage

The quality of 'Kensington' mangoes (Mangifera indica Linn.) from 2 major Queensland production regions was evaluated following a hot air [HAT, also known as vapour heat (VHT)] disinfestation treatment (46.5�C seed surface temperature held for 10 min under conditions of high humidity) combined with a disease control treatment (55�C water for 5 min) prior to HAT, and storage conditions likely to be encountered during air shipment to Japan (either 10�C for 5 days plus 22�C for 5 days, or 13�C for 5 days plus 22�C for 5 days, or 22�C for 10 days). Final quality was optimum if fruit were treated with HAT alone and stored at 22�C. Fruit injury, in the form of skin browning and lenticel spotting, was particularly severe in HAT plus disease controI fruit stored at 10/22�C. Storage at 10�C combined with heat treatments may be too stressful to fruit physiology, leading to fruit injury and reduced fruit quality at the market destination.

Ductilization of a Ni3(Si,Ti) Intermetallic Alloy by Addition of Interstitial Type Elements

2011 ◽  
Vol 409 ◽  
pp. 321-326
Author(s):  
Hisashi Kosaka ◽  
Yasuyuki Kaneno ◽  
Takayuki Takasugi
Keyword(s):  
Fracture Surface ◽  
Fracture Mode ◽  
Room Temperature ◽  
Tensile Ductility ◽  
Tensile Elongation ◽  
Intermetallic Alloy ◽  
Intermediate Temperature ◽  
Transgranular Fracture ◽  
Ti Alloy ◽  
Brittle Intergranular Fracture

The effect of a concomitant doping of interstitial type elements boron (B) and carbon (C), and boron (B) and nitrogen (N) on tensile properties of a Ni3(Si,Ti) intermetallic alloy was investigated in the temperature range between room temperature and 973 K. It was found that the concomitant doping of (C/B) and (N/B) remarkably improved the intermediate-temperature tensile elongation of the Ni3(Si,Ti) alloy compared with the simple doping of B or C. It was also shown that the fracture surface of the alloy doped with (C/B) and (N/B) exhibited the ductile transgranular fracture mode while that of the alloy doped with only B showed a brittle intergranular fracture mode at 773 K. These results clearly indicate that the concomitant doping of the interstitial type elements are useful for improving the intermediate-temperature tensile ductility of the Ni3(Si,Ti) alloy.

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