scholarly journals PREPARATION AND PERFORMANCE OF CERAMIC WASTE POWDER WITH DOMESTIC PLASTIC WASTE COMPOSITE GRINDING WHEEL

2020 ◽  
Vol 7 (13) ◽  
Keyword(s):  
Plastic Waste ◽  
Grinding Wheel ◽  
Ceramic Waste ◽  
And Performance

scholarly journals Welfare and Performance of Three Turkey Breeds—Comparison between Infrared Beak Treatment and Natural Beak Abrasion by Pecking on a Screed Grinding Wheel

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2395
Author(s):  
Stefanie Grün ◽  
Klaus Damme ◽  
Matthias Müller ◽  
Marie Franziska Sommer ◽  
Paul Schmidt ◽  
...  
Keyword(s):  
Animal Welfare ◽  
Behavioral Disorders ◽  
The Other ◽  
Grinding Wheel ◽  
Treatment Combination ◽  
Feather Pecking ◽  
Economic Problems ◽  
And Performance ◽  
Beak Trimming

Feather pecking and cannibalism are behavioral disorders that cause animal-welfare-relevant and economic problems. To mitigate these problems, the beaks of conventionally reared turkeys are usually already trimmed in the hatcheries. To find an alternative to beak trimming, we conducted this study with male turkeys of three breeds: B.U.T. 6, B.U.T. Premium and, Auburn (200 turkeys per breed). Half of the birds had infrared-trimmed beaks; the other half had intact beaks. For each treatment combination (breed, beak status), 25 turkeys were housed in one section. A screed grinding wheel was installed in each feed pan of the non-beak-trimmed turkeys as of week six to facilitate natural beak abrasion until slaughter. Eight randomly selected turkeys per section were regularly examined to record injuries, plumage condition, and beak dimensions. In addition, 96 beaks from randomly slaughtered birds were examined macroscopically and histologically. The results concerning injuries and plumage condition showed in most cases no differences between the beak-trimmed turkeys and the ones provided with the blunting disks. The histological examinations revealed alterations in only the beak-trimmed birds. We can conclude that the blunting method smoothens the beak during feeding and thus may be a possible alternative to beak trimming.

scholarly journals Complex Characterization and Behavior of Waste Fired Brick Powder-Portland Cement System

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1650 ◽  
Author(s):  
Viviana Fátima Rahhal ◽  
Mónica Adriana Trezza ◽  
Alejandra Tironi ◽  
Claudia Cristina Castellano ◽  
Milena Pavlíková ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Portland Cement ◽  
Dilution Effect ◽  
Pozzolanic Activity ◽  
Mineral Admixtures ◽  
Blended Cements ◽  
Ceramic Waste ◽  
Brick Powder ◽  
Cement System ◽  
And Performance

Two waste fired brick powders coming from brick factories located in Argentine and Czech Republic were examined as alternative mineral admixtures for the production of blended cements. In pastes composition, local Portland cements (Argentine and Czech) were substituted with 8–40%, by mass, with powdered ceramic waste. For the ceramic waste-Portland cement system, workability, the heat released, pozzolanity, specific density, compressive strength, hydrated phases, porosity, and pore size distribution were tested. The relevance of the dilution effect, filler effect, and pozzolanic activity was analyzed to describe the general behavior of the pozzolan/cement system. The properties and performance of cement blends made with finely ground brick powder depended on the composition of ceramic waste and its reactivity, the plain cement used, and the replacement level. Results showed that the initial mini-slump was not affected by a low ceramic waste replacement (8% and 16%), and then it was decreased with an increase in the ceramic waste content. Brick powder behaved as a filler at early ages, but when the hydration proceeded, its pozzolanic activity consumed partially the calcium hydroxide and promoted the formation of hydrated calcium aluminates depending on the age and present carbonates. Finally, blended cements with fired brick powder had low compressive strength at early ages but comparable strength-class at later age.

Preparation and performance of resin-bonded grinding wheel with braze-coated diamond grits

2020 ◽  
Vol 101 ◽  
pp. 107619 ◽  
Author(s):  
Ming-cong Li ◽  
Feng-lin Zhang ◽  
Yu-mei Zhou ◽  
Wei-xiong Li ◽  
Shixiong Wu ◽  
...  
Keyword(s):  
Grinding Wheel ◽  
And Performance

Study on Forming Mechanism of Surface Hardening in Two-Pass Grinding 40Cr Steel

2006 ◽  
Vol 304-305 ◽  
pp. 588-592 ◽  
Author(s):  
Gui Cheng Wang ◽  
Ju Dong Liu ◽  
Hong Jie Pei ◽  
Z.H. Jia ◽  
Li Jie Ma
Keyword(s):  
Hardened Layer ◽  
Grinding Wheel ◽  
Forming Mechanism ◽  
Creep Feed ◽  
Grind Hardening ◽  
Quenched Steel ◽  
And Performance ◽  
Grinding Temperature Field ◽  
40Cr Steel ◽  
Martensite Structure

We had done the two-pass grind-hardening experiment on 40Cr steel using the conventional aluminum grinding wheel on a surface grinder, compared the structure and performance of the hardened layer of one-pass grinding with those of two-pass grinding and analyzed the forming mechanism of two-pass grinding hardened layers. The results show that there are a similar martensite structure and change rules of hardened layer of one-pass grinding and two-pass grinding in spite of the different of initial structures, for martensite has tempered by the action of the creep feed grinding temperature field. The depths of hardened layer, microhardness and wear resistance have further improved, but the maximal compressive residual stress and its influencing depth of hardened layer have decreased. The forming mechanism of the two-pass grinding hardened layer is the same as that of the grinding hardened layer of quenched steel.

scholarly journals Preparation and performance of tannin-glyoxal-urea resin-bonded grinding wheel loaded with SiO2 reinforcing particles

2021 ◽  
Vol 23 ◽  
Author(s):  
Jun Zhang ◽  
Bowen Liu ◽  
Yunxia Zhou ◽  
Hisham Essawy ◽  
Jinxin Li ◽  
...  
Keyword(s):  
Grinding Wheel ◽  
Reinforcing Particles ◽  
And Performance
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