Concrete is a commonly requested material. To be honest, we don't know much about gluing to concrete. You could check with some building sites. Cement is the adhesive that holds concrete together. It will take some research on our part but we are thinking about doing concrete. A very cool and specialized glue! It does its job then you can roll it into ball and ... well, have a ball with it. The glue that is used for "tip ins" (magazine jargon) is referred to as a Peel and Stick glue.

Resurface with Concrete or Epoxy Floor Coatings for a weather resistant, semi-permanent, attractive low maintenance finish!

Concrete is tested to ensure that the material that was specified and bought is the same material delivered to the job site. There are a dozen different test methods for freshly mixed concrete and at least another dozen tests for hardened concrete, not including test methods unique to organizations like the Army Corps of Engineers, the Federal Highway Administration, and state departments of transportation.

The Well-Decorated Garden: Making Outdoor Ornaments and Accents.' Laura Dover Doran 'Decorate Your Garden' Pat Ross 'Making Concrete Garden Ornaments' Sherri Warner Hunter 'Sculpting with Cement' Lynn Olson 'Creating With Con

Image by: Dena This is one of our most popular questions. The paragraphs are responses by Garden Web members. The names and Web sites were removed but the basic information remains intact. Thanks to everyone who contributed! ====

RadonSeal penetrates the deepest (up to 4 inches) into concrete, reacts chemically, bonds and strengthens it. It seals sound concrete against water, vapor and radon gas. It provides the tightest seal and is permanent. The surface does not change, does not bead water, and remains paintable. LastiSeal penetrates very deep (2–4 inches) and hardens inside the concrete or bricks. It is manly designed for waterproofing. Unlike RadonSeal, it does not depend on the content of cement.

Although the terms cement and concrete often are used interchangeably, cement is actually an ingredient of concrete. Concrete is basically a mixture of aggregates and paste. The aggregates are sand and gravel or crushed stone; the paste is water and portland cement. Concrete gets stronger as it gets older. Portland cement is not a brand name, but the generic term for the type of cement used in virtually all concrete, just as stainless is a type of steel and sterling a type of silver.

Air-entrained concrete contains billions of microscopic air cells per cubic foot. These air pockets relieve internal pressure on the concrete by providing tiny chambers for water to expand into when it freezes. Air-entrained concrete is produced through the use of air-entraining portland cement, or by the introduction of air-entraining agents, under careful engineering supervision as the concrete is mixed on the job.

Concrete, like all other materials, will slightly change in volume when it dries out. In typical concrete this change amounts to about 500 millionths. Translated into dimensions-this is about 1/16 of an inch in 10 feet (.4 cm in 3 meters). The reason that contractors put joints in concrete pavements and floors is to allow the concrete to crack in a neat, straight line at the joint when the volume of the concrete changes due to shrinkage.

Portland cement is a hydraulic cement which means that it sets and hardens due to a chemical reaction with water. Consequently, it will harden under water.

It is concrete that is strong enough to carry a compressive stress of 3,000 psi (20.7 MPa) at 28 days. Concrete may be specified at other strengths as well. Conventional concrete has strengths of 7,000 psi or less; concrete with strengths between 7,000 and 14,500 psi is considered high-strength concrete.

The easiest way to add strength is to add cement. The factor that most predominantly influences concrete strength is the ratio of water to cement in the cement paste that binds the aggregates together. The higher this ratio is, the weaker the concrete will be and vice versa. Every desirable physical property that you can measure will be adversely effected by adding more water.

Stains can be removed from concrete with dry or mechanical methods, or by wet methods using chemical or water. Common dry methods include sandblasting, flame cleaning and shotblasting, grinding, scabbing, planing and scouring. Steel-wire brushes should be used with care because they can leave metal particles on the surface that later may rust and stain the concrete. Wet methods involve the application of water or specific chemicals according to the nature of the stain.

We accept most concrete. Call 883-3325 for a price sheet for information regarding prices for various concretes accepted.

Using steel reinforced concrete is important. Our normal concrete specification is 4 inches of 4000-psi concrete installed over a sub-base of 3/4" clean stone. We use half-inch #4 steel rebar 30 " on center each way as reinforcement.

Generally walls will require 3000 psi concrete or as specified by your engineer or code. Maximum aggregate size is 3/4" and placed at a 5-6" slump.