Friday, November 21, 2008
I'm sure many of you would not have been puzzled by my boys' question last night; but I wasn't sure of the answer. For some reason (how DO boy's minds work?) they started by asking me if I liked concrete or asphalt better for roads and why? We talked about the cost; concrete vs asphalt (I know concrete is more expensive but how much? why?) Then what is concrete or is it cement? What is the difference? I thought cement was the powdery stuff that glues the sand/gravel etc together to make concrete so I wasn't quite 'stumped' but I wasn't sure of my answers so I thought I'd check it out this morning.