Soil Cement Base Course for Roadway Construction

[@oscarwinner2034]

This is a good video. Thanks. Using it on another road project and wanted to research it some. This road is doing well. I drive it often.

[@DelawareT2Center]

Let's hope. It was a long time in the making. I thought for sure they'd never even start construction. The planning went on for most of my career! I suppose patience paid off.

[@swinkeymo]

Nice. What is the permeable drainage layer?

[@DelawareT2Center]

Usually, this is intended as a drainage layer. Water is the enemy of pavement and anything we can do to ensure that the underlying layers are well drained improves the chances for a durable pavement. PTB is usually a mix of stone (typically 57 Stone; think angular rock in the average range of 1/2 inch to 1 inch stone with very few fines) and either Portland cement or asphalt cement (asphaltic binder). The idea is to create a "popcorn" mix with lots of voids that water can flow through and away from the roadway, into underdrains, and so on.

[@chinhle1036]

SSIM: sand, cement, crushed stone.