Pervious Concrete Desgin Instructor: Cris Koutsougeras Advisor: Mohamed Zeidan By: Alex Rodney December 5, 2014 ET 493

What is Pervious Concrete?  Pervious concrete is a special type of porous concrete that allows water from precipitation and other water sources to flow directly through the material. This reduces runoff and allows for the possibility for groundwater recharge.

Focal Point The focus of this project is to find ways to improve the compressive strength of pervious concrete and lower the cost using recycled concrete.

Mixture  Pervious Concrete mixtures consist of rough large aggregate, sand, water, and air. Additives will be mixed into the mixtures to create a porous more cost efficient concrete.  The admixtures that I will be using will be VMAR VSC-500 along with Darex AEA.

Mix Design  The mix design that I will be starting out with will be from Ascension Ready Mix Concrete Company.

Mix Additives  VMAR VSC-500 is a concrete mixture additive that enables the production of superior quality pervious concrete. I will be adding this with recycled concrete and testing the results of its compressive strength and permeability.

Mix Additives  Darex AEA is the next additive I will be using add to recycled concrete to see what the permeability and compressive strength is.

Mix Additives  Nano Silica is a microscopic form of silica (SiO 2 ) that can be introduced into cement to improve the strength of concrete by filling in microscopic voids in the aggregate and the cementious materials. It helps prevent Alkali Silica Reactivity, which is the reason that concrete cracks.  Electron Microscope view of nano treated concrete

Testing  All testing will be done through Ascension Ready Mix’s own testing lab at their facilities.

Supplies  All of the supplies I will be using will becoming from SELU or from Ascension Ready Mix.  Darex AEA  VMAR VSC-500  Nano Silica  Sand  Fly Ash  Recycled Concrete  Pea Gravel (course aggregate)  Water

Mix Design #1  Mix Design #1 contains recycled concrete with VMAR VSC 500 and Darex to improve permiability and costs.

Mix design #2  Mix Design # 2 contains recycled concrete to cut costs and nano scilica to improve the strength of the cementious material.

Timeline/Deliverables  Timeline/Deliverables:  September 2014: Research pervious concrete mix designs  October 2014: Secure testing lab to test cylinders along with materials needed  October 2014: Gather materials / Adjust mix design accordingly  November 2014: Design mixture and prepare trial mix  December 2014: Mix and pour 1 st set testing cylinders  January 2015: Conduct tests at Ascension Ready Mix lab  February 2015: Readjust mix design accordingly  March – April 2015: Perform cost analysis and prepare final report

Any Questions?