Installing the aggregate base

Now that I found a source for recycled ¾ inch stone and have my setup to bring it into the basement, I prepare a number of elevation points and started spreading the aggregate base.

One area, towards the front of the basement, is slightly over excavated. We used the old clay sewer to fill that extra depth, rather than aggregate.

I received enthusiastic help from one of our young neighbors when it came to break the pipes into small pieces. I learned that smashing old pipes is cool.

The recycled ¾ inch stone (also known as ASTM C33 #57, or IL DOT CA7) appears remarkably similar to the non-recycled crushed limestone aggregate. I don’t have a material test report to compare, but can tell that the recycled material is almost entirely composed of recycled concrete, with a couple pieces of asphalt, brick, metal and wood in-between.



The real significant difference is that I got the recycled ¾ inch stone for about half the price of limestone based aggregate.

About Marcus de la fleur

Marcus is a Registered Landscape Architect with a horticultural degree from the School of Horticulture at the Royal Botanic Gardens, Kew, and a Masters in Landscape Architecture from the University of Sheffield, UK. He developed a landscape based sustainable pilot project at 168 Elm Ave. in 2002, and has expanded his skill set to building science. Starting in 2009, Marcus applied the newly acquired expertise to the deep energy retrofit of his 100+ year old home in Chicago.

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