Properties of Roller Compacted Concrete with Pozzolan as Cement Replacement Material Introduction: Roller compacted concrete (RCC) gets its name from the heavy vibratory steel drum and rubber-tired rollers used to compact it into its final form. RCC has similar strength properties and consists of the same basic ingredients as conventional concrete_ well graded aggregates, cementitious materials, and water_ but different mixture proportions. The largest difference between RCC mixtures and conventional concrete mixtures is that RCC has a higher percentage of fine aggregates, which allows for tight packing and consolidation [1]. RCC may be considered for applications where no-slump concrete can be transported, placed, and compacted …show more content…
The same water was used for mixing and curing of concrete cubes. Name of Test Results Coarse Aggregate Fine Aggregate Specific gravity 2.56 2.63 Absorption (%) 0.51 0.71 Fineness Modulus 1.6 6.9 Table 3: Physical properties of aggregates Pozzolan: The cement replacement material that used in the test was local natural pozzolan from Mont Popa. The chemical composition of pozzolan is given in Table 4. It is evident that the local natural pozzolan conforms to the requirements of ASM C 618 and hence, can be used as a partial replacement of the production of roller compacted concrete. Description Composition (%) Local Natural Pozzolan Requirements as per ASTM for class N Silicon dioxide (SiO2), aluminum oxide (Al2O3) and iron oxide (Fe2O3) 77.3 Min 70.00 Sulfur trioxide (SO3) 0.34 Max 4.00 Loss on ignition (%) 2.26 Max 10.00 Table 4: Comparison of local natural pozzolan with Class N of ASTM C 618 Method: The soil compaction method is the most widely used mixture proportioning method for RCC pavements. This proportioning method involves establishing a relationship between the density and moisture content of an RCC mixture to obtain the maximum density by compacting samples over a range of moisture …show more content…
Firstly, 10-20 mm and 5-10 mm of aggregates were mixed in various proportions to find the combination with minimum voids content by Loose Bulk Density Test. According to the result shown in Fig 1, 64:36 ratios of 10-20 mm and 5-10mm were selected. And then, these two aggregate and 0-5mm aggregate were mixed with various ratio. Finally, minimum void were found in a combination of 38.4:21.6:40 ratios of 10-20 mm, 5-10 mm and 0-5 mm as shown in Figure
From the data obtained in Tables 1-3, we were able to plot multiple graphs using excel. These graphs give a better representation of the data as seen in Figures 1-9. It can be seen that each figure shows a slight increase in CO2 production, which signifies a possible change in metabolic rate. Figures 4 and 7 show a relatively large change between the control and fox urine. The changes in slope between theses two are 0.0267 for Figure 4’s slopes and 0.0192 for Figure 7’s slopes.
https://www.concretedecor.net/decorativeconcretearticles/vol-10-no-7-october-2010/highperformance-mix-design-understanding-gfrc-mixes/ 15/1/2018 The GFRC mix is specially engineered depending on the requirements of the GFRC project and the type of GFRC part required.
Suppose you need to find the fractional European call and the fractional European put options. Let the Hurst parameter be $H=0.85$, the $\sigma=0,25$, $r=0.10$, $S_{fbm} = 100$, $K = 95$, we have \begin{eqnarray*} d_1^{fBm} & = & \frac{\ln{\frac{S}{K}} + \frac{1}{2}(r( T - t) + \frac{(1)\sigma^2{( T^{2H} - t^{2H})}}{2})}{\sigma{\sqrt{T^{2H} - t^{2H}}}}\\ & = & \frac{\ln(\frac{105}{100}) + (0.10(0.25 -0) + \frac{(1){0.25^2}{0.25^{2(0.85)} - (1)0.25^{2(0.85)}}}{2}}{(0.25){\sqrt{0.25^{2(0.85)} - 0}})} \end{eqnarray*} we obtain $d^{fBm}_1= 1.0558$. We find in the normal distribution that $N(1.0558)= 0.8544$ and $N(-1.0558) = 0.1456.$
K.D.A. Saboia et al. , (2007) have been prepared the Bi4Ti3O12–CaCu3Ti4O12 {[BIT(X)–CCTO(100-X)]} composite powders through solid state reaction method and calcined in the range of 900 to 1020 ºC for 12 h. The as-prepared powders have modified in the form of thick film onto alumina ceramic substrate by utilizing screen printing. At 100 Hz, the value of dielectric constant (κ) of CCTO100 and BIT100 is 316.61 and 53.64 respectively. Conversely, the composite with X=20 % shows an unexpected dielectric constant of 409.71, which is around 20% higher in comparison with the CCTO.
1. A bacterial transformation is when a foreign DNA is inserted into the bacteria's original DNA to alter the genome for a certain outcome. This is usually done by using a plasmid to transfer and incorporate the foreign DNA into the original genome. First, bacterial cells are centrifuged to make a pellet.
Introduction: Transforming a gene or genetic information from one organism into another with the hopes that if done successfully the organism with the new DNA will be given new traits is a method known as genetic transformation (Rafter). Genetic transformation is used quite frequently in today’s world, form medicine to agriculture. In this lab we will be inserting a gene into an Escherichia coli bacteria with the help of a plasmid. Escherichia coli bacteria also known as E. coli, is a bacterium that is rod shaped and contains flagella to help it move.
The data observed and recorded in this lab shows that the concentration of miracle gro’ does affect the growth rate and germination speed of black eyed peas. The data is shown through two graphs and two data tables. The control group in this experiment is the seeds with a 0% concentration of miracle gro’, therefore the seeds with just water. The experimental groups are different concentrations of miracle gro’ including a 10%, 15%, 20%, 25%, and 30% concentration. The variable in this experiment is the amount/concentration of miracle gro’.
Hypothesis: Increasing substrate concentration will increase the initial reaction rate until it stops increasing and flattens out. Independent Variable: Substrate concentration Dependent Variable: The substrate itself, 1.0% Hydrogen Peroxide How Dependent Variable will be Measured: Hydrogen Peroxide will be used in every experiment, just with different test tubes. The amount of Hydrogen Peroxide in the mixing table is the amount that will be added to each test tube.
Concrete pavement, on the other hand, is a mixture of cement, sand, water, pebble, and crushed
Introduction The purpose of this lab is to use control variables to help identify different macromolecules. Biological systems are made up of these four major macromolecules: carbohydrates, lipids, proteins and nucleic acids. Carbohydrates are sugar molecules (monosaccharides, disaccharides, and polysaccharides) which make them the most abundant macromolecule on the earth. Lipids (oils and fats, phospholipids and steroids) are insoluble in water and perform many functions such as energy source, essential nutrients, hormones and insulators (Lehman, 1955).
All procedures for this lab was obtained from the Marshall University BSC 121 Principles of Biology for Majors Laboratory Manual (Weinstein, 2015). On September 22, students in biology 121 section 101 obtained nine pots to plant their respected peas. Once the pots were obtained, students placed paper towels in the bottom of the plots to keep the vermiculite from falling out. When the paper towels were placed in the pots, they were then filled up ¾ of the way full with vermiculite, and were watered adequately. Four shallow holes were then created with a finger, and were filled with peas.
At the macroscopic level when a firework goes off the effects of molecules interacting can be observed through the light being produced. I expect the firework to travel to a high distance vertically in the air. I expect the firework to start in a tight ball. As it travels the tight ball (of molecules) will expand in its perimeter causing the firework to combust, making a very loud bang. I’m sure that heat radiates as a outcome of this interaction, though it wouldn’t be smart to get close enough to feel the heat.
Polyvinyl chloride is obtained by chain polymerization. Double bonds of vinyl chloride monomer get opened up. Since monomers possess a double bond between two of their carbon atoms in their structures, those get activated in the presence of tiny concentrations of starters. In this way, double bonds get open and monomers react rapidly so they associate with each other by forming macromolecules chains. Polyvinyl chloride polymerization is a highly exothermic reaction, where a high amount of heat is broken away (1525 kJ/kg).
• Ignition location cannot be chosen optimally. • Spark plug electrodes can disturb the gas flow within the combustion chamber. • It is not possible to ignite inside the fuel spray. • It requires frequent maintenance to remove carbon deposits. • Leaner mixtures cannot be burned, ratio between fuel and air has to be within the correct range.
Cracks are expected at intervals in this slab (Usually .90 to 1.2m) and are held together with structural steel. Appropriate spacing between cracks must be determined in order for this method to work. Continuously reinforced roads can sometimes be more expensive than the other two methods due to the higher quality of steel used in its construction, however this can be lowered by the reduced amount of cement used in the concrete mixture due to the thinner layer of concrete in comparison with the other two methods. With proper management, this method can be similar to the other two in terms of durability and cost