For my research project, I am looking into flyash concrete as a suitable replacement for current concrete. Concrete, as I stated in a previous post, is the most widely used material in building construction, and as a result of this, creates huge CO2 emissions into the atmosphere. Flyash concrete is being used widely into days concrete structures. Flyash, when it is used with concrete, is mixed together to reduce the amount of aggregate and portland cement that is needed to be used. The standard mix is usually about 9% flyash with the rest normal cement. This is what is being used in today’s construction for projects, and I am proposing that flyash, in the future, replace concrete 100%. I am currently looking into the research as of if this would be possible, and am finding some great feedback.
One thing that I will be using in my research is the 35W bridge in Minneapolis, MN as a precedent. The 35W bridge collapsed on August 1, 2007 and when they rebuilt it, using a mixture of flyash and concrete. Structurally, the flyash doesn’t weaken the concrete, and you are removing CO2 emissions in 2 ways: both as less concrete is used in a heavily harmful production, and the flyash isn’t going to a landfill thus not releasing CO2 into the atmosphere. There is also arsenic, lead, and mercury in flyash, and release of these into the atmosphere is stifled when it is locked into concrete form.
Flyash has many benefits, and downfalls as well, but my research will be in seeing if it is a viable replacement for the future in building construction.