At my condominium complex, we have a few hundred feet of of concrete walkways. The surface of the walkway shows exposed aggregate. It looks good.
Over the years, sections of the walkway have been replaced by various contractors. In every case, the new walkway is poorer quality that the original walkway. After only 2-5 years, new sections start to become pitted as the aggregate comes loose. The original walkway, in comparison, is 22-years old and shows almost no pitting.
I'd like to know how to create a concrete walkway with exposed aggregate that doesn't start pitting after only a few years. Our contractors obviously don't know.
Can anyone offer specific suggestions about materials and techniques?