Polyurethane & Epoxy Concrete Crack Repair Methods

Due to a leak in concrete slab, there may occur moisture related problems inside a structure. The waterproofing industry has always been trying to find ways to provide rock-solid solutions to the needy. In the below subsections, we discuss two most popular cracks repair and methods of moisture test for concrete slab –

• Injection Therapy

In the industry, there are used two types of injection therapies: polyurethane and epoxy injection. The best way to ascertain that the line has been filled properly is to inject the solution or paste from inside. Whether you are using polyurethane or epoxy, make sure that injection ports are affixed on the surface, after a layer of the paste has been applied over the split.

• Polyurethane Method

Polyurethane foams are less expensive and easier to use than epoxies, however there are a few drawbacks of this concrete crack repairing method. It does not add to the strength of the structure, though it welds and fills the crack, after being injected inside.

• Epoxy Concrete Repair Method

On the other hand, the epoxy technique allows you to weld and fill the crack, and strengthen the bond between the solution and the structure, as well. And surprisingly, the strength of the bond can sometimes be more powerful than concrete.

Factors That Play A Pivotal Part During Concrete Core Testing

Testing the strength of a concrete slab becomes imperative sometimes. To determine the vigor of the toughened slab, the slab is drilled, and then, core testing is performed. In the concrete core testing procedure, the core of the concrete lab is tested out.

If it becomes unfeasible for the testers to determine the condition of the slab via comprehensive strength tests, core testing remains the best possible resolution for them. The comprehensive and core testing are two far different testing procedures that determine different purposes. While the cylinder strength test ascertains the quality of the concrete, the core testing determines the quality of the in-situ concrete. Since drilling is a prime stunt, the strength of the stone also gets revealed with core testing measures.

There are several factors that influence the results of core testing –

The Diameter of concrete core – To attain the best results, the diameter of the sample slab should be at least 3.70 inches (for comprehensive strength load bearing), and 1.5 inches (for concrete with nominal maximum size).

The length of the sample slab – The length of the specimen concrete slab should be between 1.9 and 2.1 inches.

The evaporation of moisture – After drilling the slab, it is important to clean and wipe off the surface with water. And it is even more important to allow the water to evaporate completely, before taking the sample. Ideally, it takes about 1 hour to the water to evaporate entirely. You can place the samples in your envelopes after that duration has passed.