Building material

Abstract: The study investigated the workability, and compressive strength properties of the concrete produced by replac-ing 5%, 10% and 15% by weight of ordinary Portland cement with Sawdust Ash (SDA). Slump test was carried out on the fresh concrete and compressive strength test on hardened concrete. The concrete cubes were tested at the ages of 3, 7, 14 & 28 days. The results showed that Sawdust Ash is good with use in cement. The slump decreased as the Sawdust Ash content increased…

fairly chemical resistant and does not rust compared to some metals. 4.0.4 Fibreglass Composites - This material combines the resilience, stiffness, flexibility and strength. The resulting material is very lightweight, fairly…

Koutsomichalis et al (2008) discussed that having high hardness and good adhesion with the substrate the sprayed coating exhibited satisfactory wear resistance. Tungsten carbide is an advanced ceramic material combining a unique set of properties such as high hardness, high melting point, wear resistance, good thermal shock resistance, thermal conductivity and good resistance against oxidation. They can be applied as coatings by thermal spraying processes such as plasma-spraying, high-velocity…

In our previous report, 21 we investigated the influence of formulation variables of clotrimazole-loaded cubic liquid crystalline nanoparticles. The composition of chitosan tailored cubic nanoparticles was optimized employing central composite design. The findings of Small angle X-ray scattering analysis confirmed the presence of D and P cubic phases in nanoparticles. Most importantly, considerable improvement in mucin binding was observed upon incorporation of chitosan owing to electrostatic…

Observation & Calculations for Nanorefrigerant Graph of C.O.P. vs. Nanoparticle Concentration for Nanorefrigerant. C.O.P RESULTS WHEN NANOPARTICLE MIXED IN R134A & POE OIL Figure 5.1. Graph of nanorefrigerant C.O.P vs. nanolubricant C.O.P. 5.2. GRAPH OF PERCENTAGE CHANGE IN THE COP OF THE SYSTEM Figure5.2. Graph of percentage C.O.P of nanorefrigerantvs. nanolubricant. Here the result shows the percentage change in the C.O.P when the air conditioning test rig run on the nanorefrigerant and…

3.3.3 Selection of Die Angles The split die was designed for the ease of assembly for fabrication. AISI 52100 steel was selected as the material for the die fabrication. The entry part of the die is 12 mm and has 120 mm length. The profile of the die is also shown in the solid works software. The angle of the die is 90 is maintained, the slope radius is 20 mm. the Figure.3.1 & Figure. 3.2. illustrate the split die design and solid works model of the split die. Figure. 3.1 : Split die…

3. MIX DESIGN 3.1 Design of Geopolymer Concrete Mixtures: In the mix design of geopolymer concrete the role and the influence of aggregates are considered to be the same as in the case of Portland cement concrete. The mass of combined aggregates may be taken to be between 75% and 80% of the mass of geopolymer concrete. Coarse and fine aggregate together were taken as 77% of entire mixture by mass. Fine aggregate was taken 30% of total aggregate. Fly ash and alkaline liquids was taken 23% of…

In the paper, FePO4 was studied in through neutron powder diffraction across a wide range of temperatures, and was found to have 2 states in general, the α (alpha) phase and β ( beta ) phase. The alpha phase exhibits a tetrahedral structure, which is similar to alpha quartz, and this occurs during generally low temperatures. In the case of this paper, the temperatures experimented on were between 294K and 1073K. The beta phase, however, is denser and exhibits a octahedral structure. The…

(3) The boundary layer mass transfer equation in batch system is as: dq/dt=(3k_f R(C-C_s ))/(D_s ρ(1-ε)) (4) The equation of material balance for slurry adsorption system is studied using…

A Ban on Water Bottles In the article ‘’ A Ban on Water Bottles: A way to bolster the University’s image’’ Amanda Jacobowitz discusses the ban of water bottle sales in her campus. The University of Washington has arranged an accession to ban water bottles over the usage of plastic. Water should be a product available at any campus for dehydration. Having an ecofriendly environment can change people’s perspective on how much plastic is being withered. The amount of water usage it takes to make…