Once more, here are some past blog posts that may be useful at this time of year:
06/04/2015 Final Exams II
06/15/2014 End of Year Activity – Lab Clean-Up
06/08/2014 Final Exams – End of Year Preparation
O6/01/2014 High School Lab Activity –Tie Dyeing
The book Chemistry on a Budget contains inexpensive chemistry labs that are useful with easy to obtain materials.
There are two versions of each lab, one with a ten-question conclusion and one with directions for a full lab report. This way the teacher has the option! Each lab is two pages to allow for one two-sided handout.
You can buy this lab book for $23 at amazon.com or lulu.com. It will take 1-2 weeks to get to you -- Order Now. It’s a great resource, especially with the 2016-2017 science budget being used up!
*Some of you have already purchased my lab book – be sure to check out Page 141 !
“A Scotland-based company called MacRebur has come up with a way to create roads that are made of recycled plastic, and are stronger and longer-lasting than normal asphalt-based roads.
The roads are made with a material that MacRebur calls MR6. The MR6 gets mixed with other road-making materials to hold the street together, replacing the need for the oil-based substance known as bitumen. …
The MR6 is made entirely from waste materials that get mixed into asphalt to create the durable roads. According to MacRebur, roads built with MR6 are less likely to crack than conventional roads; the company says they also lessen tire resistance, which could help improve fuel economy for any vehicles using the roadway.”
“U.K. entrepreneur and engineer Toby McCartney has been working to change that, courtesy of technology that allows for the creation of high quality road asphalt out of recycled plastic waste. With the innovative tech, he now wants to use discarded plastic from landfills to transform millions of kilometers of roads around the world.
‘We take waste plastic that is destined for landfill sites and recycle it,’ McCartney told Digital Trends. ‘What we’re able to do is to take this plastic that has been thrown away, and use a special formula to clean it off, create pellets using it, and then use those pellets to add to a mixture of rocks and bitumen to make longer-lasting roads.’ “
“Our city roads require a lot of maintenance over time as weather deteriorates them and potholes open up. Meanwhile there are around five trillion pieces of plastic in the ocean. McCartney came up with an answer to both issues. He turns 100 percent recycled plastic into what he calls MR6 pellets, or small pellets of waste plastic, which replace bitumen, the material used to bind roads together (extracted from crude oil) and sold by oil companies like Shell.”
As someone who experiences local roadways damaged every winter, this is a very exciting prospect.
“McCartney has already persuaded two English councils to start using their local waste plastics to build their roads this way. He says these roads are cheaper to make and last longer than conventional roads, and if he’s right, he may be putting us on the road to a cleaner planet.”
“The roads constructed using waste plastic, popularly known as Plastic Roads, are found to perform better compared to those constructed with conventional bitumen. The Indian Centre for Plastics in the Environment (ICPE) has been promoting the use of plastic waste to construct asphalt roads. A few trial roads have been paved successfully by combining waste plastic with bitumen. Plastic roads mainly use plastic carry bags, disposable cups, and bottles that are collected from garbage dumps as an essential ingredient of the construction material. When mixed with hot bitumen, plastics melt to form an oily coat over the aggregate and the mixture is laid on the road surface like a normal tar road.”
But along with the advantages, there are [some] disadvantages to using this approach:
“1. Cleaning process- Toxics present in the co-mingled plastic waste would start leaching.
2. During the road laying process- in the presence of chlorine will release noxious HCl gas.
3. After the road laying- It is opined that the first rain will trigger leaching. As the plastics will merely form a sticky layer, (mechanical abrasion).
4. The components of the road, once it has been laid, are not inert.”
This is a current topic that students could research for Extra Credit or that could be presented as an Essay Question on a Final Exam.
Past Organic Chemistry posts include:
05/28/2014 Organic Chemistry – Chemical Reactions
05/25/2014 Organic Chemistry – Organic Compounds
05/21/2014 Organic Chemistry –
Alkanes, Alkenes & Alkynes
05/14/2015 Fractional Distillation
05/05/2017 Trans Fat Ban
*This Blog contains several entries that would be helpful to your chemistry classroom. Check out the Topic List to help you to find past Blog entries.
Also, Write To Me about your successes, challenges, or questions in the Chemistry Classroom.
Remember, buying a copy of the lab book Chemistry on a Budget can be very useful to your Chemistry classroom with labs and class article ideas.
Have a great weekend!