5.1. Preamble
Lime and cement are commonly used chemical additives for stabilization of expansive sub-grade soils. Lime is used to stabilize fine grained soils where as cement is effective for granular materials (Little and Nair, 2009). In the present study two chemical stabilizers namely a locally manufactured hydrated lime and imported cement based industrial product ANSS were used for the stabilization of the sub-grade soil. Laboratory tests were conducted on hydrated lime-soil and ANSS-soil mixtures to evaluate the performance of these chemical additives on the sub-grade soils at varying proportions and with different curing periods.
The initial lime consumption was determined according to ASTM D6276-99a (1999) also known as “Eades and Grim” test. Laboratory tests with hydrated lime proportions of 2%, 4%, 6% and 8% with 7, 14 and 28 days of curing periods were conducted. However, the proportion for ANSS was determined according to the information obtained from user guideline prepared by the supplier (Anyway Company Ltd, 2003). According to the guideline the standard methods, as suggested by ASTM, AASHTO, British Standard (BS) and standard specifications and test methods can be utilized. Accordingly, based on the guideline and the supplier experience ANSS proportions of 2%, 4% and 6% with 7, 14 and 28days of curing periods were considered.
Watering The pH of each Celosia plant was taken using the pH meter and recorded. Each Celosia plant was sprayed with 10 sprays with the corresponding solution each day.
Method In this experiment, we tested our hypothesis through the use of chromatography paper. Chromatography paper have the ability to separate colored chemicals or substances. We also used 10 grams of grinded coleus leaves and grass leaves, 90% acetone, magnesium sulfate, pencil, ruler, forceps, 1 capillary, 1 jar with lid, and a timer to conduct this experiment. We began this experiment by grinding the 10 grams of coleus leaves and grass leaves in 10mL of 90% acetone.
The garden in the concrete Andrade chooses to use his personal anecdotes in the opening piece so that the people in the audience that grew in a similar situation as he can connect to the theme he is going to talk about. Opening the speech with that little story of his childhood is a good strategy so that it could draw the attention of the public. When someone uses their personal stories in this kind of speeches it reflects that the person wants us to understand his point in their little anecdote. He chooses to interpret the poem and compare it to the kids he teaches, he is trying to prove his point that when a kid living in a hard situation can overcome it and grow to be a better person. When he says that people don’t question the rose´s
The Earth has been creating many amazing things for centuries which can be found all over the world and has many parks dedicated to these amazing landmarks. These parks can just be normal parks with amazing views or just being a serene place to relax. Some parks however can be seen as being human made and can be just as fascinating as the ones that are natural. While these things can be similar they can also be very different to this will be the focus of this essay and how they can be similar or just different. Each paragraph is focused on a compare and contrast of each subject which is Normal natural parks versus The Newark Earthworks.
This experiment was done by using a mandarin orange. First, a mandarin orange was peeled off and squeezed to get 30ml of its juice in a beaker. Next, the juice was diluted with distilled water to get a measured volume of 50ml solution. After dilution, the solution was transferred into a 100ml Erlenmeyer flask. As it was done in the Experiment A, 20 drops of 0.2 M acetic acid and 10 drops of 2% starch solution was mixed well with the juice solution.
Commercially available lemon juice has a concentration around 34.1 to 48.0 g/L (0.177 to 0.249 mol/L) of citric acid (intext reference). It was hypothesised that the citric acid concentration of the lemon juice investigated would be in the range of 0.177 to 0.249 mol/L. Discussion Commercially available lemon juice has a
The following equation shows this reaction: CaCO3 -> CaO + CO2. Store the lime into a closed container and add aluminum. Heat the mixture to 2,552 degrees Fahrenheit to obtain pure calcium according to this equation: 5CaO + 2Al -> Al2O3 + 2CaO + 3Ca. These are the few ways that you are able to obtain calcium on its
The chemical properties of chemically preserved orange juice are presented in Table 1. The pH of the examined orange juices ranged from 3.30 to 3.66. The pH decreased with increasing week of storage indicating acidity in orange juices. The use of sodium benzoate, sodium metabisulphite and potassium sorbate as preservatives significantly influence the pH of orange juice. The pH of samples was stable throughout the first and second week of storage.
Purpose: The purpose of this lab was to identify what the unknown acid though doing pH titration. To obtain the unknown acid, the KA value of the acid was determined through experimentation of the reaction (a quantitative method). Another method to obtain the unknown acid solution is through qualitative observations. The unknown number of the solution was 152.
Two of the same types of plants were used, in order for the results to be reliable. One of the plants was labelled DISTILLED whereas the other was ACIDIC, so the results don’t get mixed. The DISTILLED plant was used as a controlled variable, where normal spring water was used (pH 7.3) The ACIDIC plant was the one the experiment had taken place on, this was where lemon water was used (pH 2.0) Throughout the experiment pictures were taken, so one will be able to notice the colour change on the acidic plants, as it had started to slowly die. With both plants you are able to notice that they had both started to grow flowers, but more the spring watered plant than that on the lemon juice watered one. The results of the plant growth was recorded to we would be able to notice the amount it had grown, this would be the water compared to lemon juice.
Although we did not find any difference between the two irrigation fluids with regard to the safety for smaller calculi, its safety has to be confirmed with larger studies, especially for large
Materials and methods Plant materials Fruits of three citrus cultivars of Kaffir lime (Citrus hystrix DC.), Lime (Citrus aurantifolia Swingle) and Pomelo (Citrus maxima Merr.) were obtained at the mature stage from local market around Phitsanulok province area during July to September, 2014. Chemicals and reagents Ethanol and ethyl acetate were purchased from Phathumwan?, Thailand. Folin-Ciocalteau reagent and Tween 80 were purchased from Loba Chemie, India. Gallic acid and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) were purchased from Sigma-Aldrich Chemicals, Germany. Tryptic Soy Broth (TSB), Tryptic Soy Agar (TSA) and Plate Count Agar (PCA) were purchased from Himedia Laboratories, India.
There were four rows in each plot, which the row width and length was 0.6 and 6 m, respectively. At third leaf stage, plants were thinned for the appropriate final stand of 160000plants ha-1. The applied factors consist of sweet sorghum varieties (KFS2 and KFS3), top removal treatments (control, mechanical removal and chemical removal with ethephon) and magnesium sulfate rates (0, 4 and 8 mM). Sweet sorghum varieties are new hybrids released in Iran.
Carbonation is the reaction of lime with carbon dioxide from the air to form weak cementing agents, notably calcium carbonate (CaCO3). This is undesirable(Bell, 1993). Becoming unstable, calcium-silica, calcium-alimino and calciumalumino-silica hydrates may react with carbon dioxide to revert back to silica, alumina, and calcium carbonate if the pH of the lime-stabilized soil drops sufficiently low. Carbonation reactions are harmful to the long-term strength and durability of the lime-stabilized soil. Using sufficient amount of lime (to provide enough alkalinity), compaction of the soil to high density and prompt placement after mixing lime with soil (to minimize carbon dioxide penetration) can minimize potential carbonation problems.
Decorative Choices For Your New Concrete Driveway If you 're tired of the maintenance needs of a dirt or gravel driveway, then it 's time to consider installing something more permanent. One option is concrete. Concrete driveways are durable and they can be stylish too. You generally have more options with concrete than you do with asphalt since concrete is lighter in color and can be dyed easily.