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More stories about Aggregates

  • Q&A: Sanding Cupped Floors

    Q: Recently we installed a new oak strip floor during renovation of an old unoccupied house, and now the floor has permanently cupped. The house is built over a fairly damp crawlspace and has diagonal board floor sheathing. The original yellow pine flooring was badly damaged by termites, so we laid...

  • Q&A: Strength of Concrete Mix

    Q: Many years ago, a concrete contractor gave me a recipe for mixing concrete by hand or machine. It is the only mix I have ever used. Is there any way to know how strong the mix is? I use 1 part Portland cement, 2 parts clean sand, and 3 parts clean crushed stone (7/16 inch or 3/4 inch, depending...

  • Pressure-Treated Foundation Repair

    With cold weather setting in, this upstate New York remodeler decided to use a pressure-treated wood foundation to replace a crumbling cement-block wall in a hillside garage.

  • Compacting Problem Soils

    Improper soil compaction leads to a host of concrete failures, from cracked pavements and slabs to leaking basements and settling foundations. A concrete expert tells how to avoid these problems by identifying the soil type, using the proper amount of moisture during compaction, and choosing the...

  • Alternative Septic Systems

    It’s getting harder to find suitable soil for in-ground septic systems. A consulting engineer examines two new technologies for handling residential wastewater.

  • Q&A: Slab Over an Existing Slab

    Q: What type of preparation work is needed before placing a 4 1/2-inch-thick topping over an existing slab?

  • Specialty Finishes for Concrete Slabs

    Exposed concrete slabs don’t have to look dull and gray. Here’s how to use dyes and stains, stamped patterns, and exposed aggregate to create an attractive and durable finished slab.

  • Q&A: Matching Old Mortar

    Q: In an upcoming remodeling project, we will be uncovering a section of hidden stonework that will need to be repointed to match the existing exposed stonework. How do we go about matching the color of the mortar?

  • Letters

    APA defends panel grading system, ready-mix radiant slabs

  • For What It's Worth

    New insulated concrete block, knock-down lumber rack for pickups, clips for patching holes in drywall, fix for squeaky floors