For calculations, refer to Appendix E. Finally, multiplying Ymax by Avagadro’s number will give the number of AA molecules adsorbed on the surface of one gram of charcoal at saturation. Since the approximate surface area occupied by a single AA molecule is 2.1E-19 m2, one can calculate the total surface area of one gram of charcoal. For calculations, refer to Appendix F. Note that all uncertainties from several dilution steps, weighing of the charcoal, the titration steps, and every measurement are taken into account when determining Y and C/Y. The calculated uncertainties are used to draw the error bars on the plots in Figure 1 and Figure
Moisture content, maximum % 3.0 3.0 3.0 Loss on Ignition, maximum % 10.0 6.0 6.0 Table 2.8: The physical requirements in ASTM (ASTM C 618 – 03, 2008) Physical Characteristics Class F and Class C fly ash Fineness – amount retained when wet sieved on 45 micron; No.325 sieve, maximum % 34 Strength Activity Index ▪ With Portland Cement at 7 days and 28 days, minimum % of control 75C ▪ Water requirement, maximum % of control 105 Soundness – autoclave expansion or contraction, maximum % 0.8 Uniformity Requirements ▪ Density, maximum % 5 ▪ Percent retained on 45 micron; No.325 sieve, maximum % points from average
SYSTEM SUITABILITY THEORETICAL PLATES: A standard solution of 25 µg mL-1of Amoxicillin trihydrate (in triplicate) was prepared and same was injected, then the system suitability parameters were calculated. Theoretical plates per meter Theoretical plates per meter were calculated from the data obtained from the peak using the following expression n = (5.54Vr2)/LWh2 Theoretical plates per column Theoretical plates column were calculated from the data obtained from the peak. n = (5.54Vr2)/Wh2 Where, ‘n’ is number of theoretical plates per meter, ‘Vr’ is the distance along the base line between the point of injection and a perpendicular dropped from the maximum of the peak of interest and ‘Wh’ is the width of the peak of interest at half peak
The construction of the stacked flat laminates is carried out by a mould of rigid and flexible sides. This permits the selection of the mould that processes the laminate very rapidly, accurately and with minimum waste of raw materials. The manufacturing method would produce laminates of greater strength and design flexibility in comparison to the traditional methods such as the hand lay-up. Due to the potential problems that can arise with infusion moulding, a trial and error approach should be used to perfect the setup (Fibre-Glast, 2013). These potential problems are leaks occurring or air getting into the resin inlets, which can create air bubbles or the air could create locks which could lead to resin pooling the part.
The mechanical properties of concrete determined in the laboratory include compression strength, splitting tensile strength and flexural tensile strength. The influence of partial replacement of fine aggregates by copper slag on the compressive strength, split tensile strength on cylinders and flexural strength of prisms has been evaluated. The test results showed that there is a possibility of use of copper slag as fine aggregate in
Portland cement mixed with sand, gravel and water, a process called hydration, is how concrete is created. Crushed stone aggregate fine and coarse aggregates make up the bulk of a concrete mixture. Durability of concrete may be defined as the ability of concrete to resist weathering action, chemical attack, and abrasion while maintaining its desired engi-neering properties. Different concretes require different degrees of durability de-pending on the exposure environment and properties desired. For example, concrete exposed to tidal seawater will have different requirements than an indoor concrete floor.
The concrete should be used as efficient as possible. Nowadays researches efforts are continuously looking for new, better and efficient construction method. Various theories related to the analysis of structural elements reduced the self-weight of element for a given load- carrying capacity. Structural material optimization can reduce the dead load which reduce the contribution of seismic effect in high rise structures and also very good at the vibration dampers and heat isolation. According to the natural behaviour of the concrete, it is strong in compression and weak in tension.
Silica which is soluble in about 2 to 3N hydrochloric acid can be taken as reactive silica. The acid-soluble silica can easily and accurately be determined by plasma emission spectrometry using a very small quantity of fly ash (Sivapullaiahet al. 1998). 3.3. Soil – Lime Reactions The addition of lime to a soil initiates a two stage reaction.