Things to Know about Concrete Strength Test

There are several ways to test the strength of hardened concrete. Some tests are completely non-destructive while some are slightly destructive, leaving small holes that can easily be patched. Individuals performing concrete strength tests must be qualified and have appropriate certifications stipulated by the ASTM standard test methods.

The easiest and most common strength test for concrete involves making a cylinder fresh and consolidated concrete and testing the hardened sample a specified age. A common requirement for casting concrete strength specimens is that moulds should be cylindrical, with a height to diameter ration of 2 is to 1. Moulds used to form concrete test cylinders vertically should conform to ASTM C470. Conforming to size and ratio standards is important to ensure accurate lab test results.

The second most common type of concrete strength testing uses beam specimens that are hardened in a horizontal position instead of a cylindrical form. Beam specimens are commonly used for flexural strength testing. They are commonly formed in a mould of 6x6 inches, 20 to 21 inches long. Beams are typically used for pavement and slabs, particularly in airport pavements.

A slightly destructive form of concrete strength test involves taking cores out of a concrete structure. This is commonly used to obtain strength information on old concrete structures. The core samples or test specimens should not be taken until the concrete is strong enough to allow removal of samples without disturbing the bond between the coarse aggregate and the mortar.

In addition, to obtaining strength information on aged concrete structures, core samples may also be requested when question arise as to the quality of the concrete in place as a result of low-strength test results during construction or due to distress signs in the structure. Coring is slightly destructive, but samples can be taken from less critical locations to diminish the impact on the structure.

Comments

  1. juanjuergens12 January 2017 at 04:19

    Great post, and great website. Thanks for the information!
    washing fastness tester

    ReplyDelete
  2. Anonymous16 January 2017 at 02:39

    Thank you again for all the knowledge you distribute,Good post. I was very interested in the article, it's quite inspiring I should admit. I like visiting you site since I always come across interesting articles like this one.Great Job, I greatly appreciate that.Do Keep sharing! Regards,
    washing fastness tester

    ReplyDelete

Post a Comment

Popular posts from this blog

Advantages of Universal Testing Machine

The main advantage of investing in a universal testing machine is that the device can be used to test the strength, durability, and suitability for most any material. A universal testing machine has the capability to pull, compress, bend, or stretch material to its breaking point. It is primarily used by laboratories that manufacture and or mould different types of plastics. A universal testing device features one or two vertical columns mounted on a base. A second horizontal plate contains attachments that are used to hold the sample and slides up and down during stress testing samples. Dual vertical column machines are preferred by most laboratories as they can handle larger samples in terms of size and weight. Determining tensile strength is the most common test performed in a universal testing machine. This is done by holding one end of a sample in place while the other is pulled away until two sides are torn apart. The same process is used for testing flexural str
Read more

Uses for Universal Testing Machine

Universal testing machine or UTM is aptly named as it can perform various types of tensile and compression tests on different materials. There are also many different terms used to refer to a UTM that you will commonly hear in the industry, among the most popular of which are a tensile tester, bend tester, and compression tester. Some types of UTMs are stripped of some capabilities and/or are marketed to specific sectors, like texture analyzers for food, peel tester for adhesives, labels, and tapes, and top load compression tester for pipes and packaging. True UTMs can perform all of these and more. They are great multi-purpose instruments for any QC or R&D laboratory. The following are only a few common uses for UTMs: Tensile testing – One of the most common applications for UTM, a tensile test measure how strong a material is, how long it can stretch, and how stiff it is as the material is pulled apart until breaking point. Compression testing – Compr
Read more

Precautions to Be Taken While Using a Piezometer

The piezometer is a measuring device that determines pore pressures underground and liquid pressure. By determining pore pressure, you can understand the behaviour of the ground before, during, and after a construction project. Certain precautions must be taken when using a piezometer to ensure proper usage and the accuracy of results. Here are some of them: Have the right equipment – Invest in a state-of-the-art piezometer that uses a proven method of converting fluid pressures on the sensitive diaphragm into frequency signals which are ideal in the demanding environment common with civil engineering applications. Modern piezometers are capable of long distance signal transmission without degradation. They can tolerate wet wiring conditions and resist external electrical noise, too. Some manufacturers make piezometers specific for different applications, for instance, you should be able to find one with a heavy-duty body that can be b
Read more