Established in 1989, MTA Consult specialises in investigating, testing and surveying a wide range of reinforced concrete structures and buildings, including bridges, tunnels, multi-storey car parks and office buildings. We are based in Melbourne!
There are several techniques that are available for the purpose of concrete investigation. The Windsor Probe is considered the best penetration depth tester, while the Rebound Hammer is a surface hardness tester. Both of these tools use a spring-controlled hammer to determine the rate of re-cracking of concrete. The results of these tests are used to identify the cause of low strength concrete. Depending on the type of concrete, petrographic examination may be necessary.
Cracks in a concrete structure may be a symptom of structural or non-structural defects. Cracks can occur due to several causes, including design errors, improper construction, excessive loads in service conditions, and even unexpected physical damage. Cracks in concrete can also be caused by corrosion, fire, and moisture. Envista can help you determine the cause of a concrete failure by conducting a thorough investigation. To avoid further damage, consider the benefits of a comprehensive concrete investigation.
Ultrasonic Concrete Testing (USH) can be an effective method of determining delamination in concrete. Ultrasound testing involves placing a probe on either side of the test specimen and measuring the speed of incoming ultrasonic pulses. This method also requires the use of an echo scanner probe, which sends in an array of echo signals. Ultrasound investigations can also determine voiding in concrete. By using this method, defects can be seen in 3D images. Another type of concrete investigation involves the Sonreb method, which uses a combination of UPV and Schmidt hammer readings to assess the strength of a large sample. Visual surveys also include crack mapping and measurement.
There are many different tests that can be performed on concrete. Some of these tests can directly be applied to the assessment, such as carbonation depth and compressive strength of retrieved cores. The value of these tests lies in their interpretation, and the reliability of the results is critical. However, a concrete investigation is incomplete without an understanding of concrete at a microscopic level. If it can be analyzed properly, it will be able to reveal a comprehensive picture of its intended use.
SEM-based tests of concrete are the most popular tools for evaluating concrete's health. They can evaluate corrosion patterns, identify areas of greatest exposure and determine the severity of damage. For example, SEM uses energy-dispersive x-ray spectroscopy (EDX) to measure chemical reactions in concrete. SEM also incorporates techniques such as gamma ray spectroscopy and SEM-EDX to analyze chemical reactions in concrete.
The Laboratory also houses specialized tools to analyze concrete's performance. Among them are automated freeze-thaw chambers and a computer-controlled chloride penetration testing apparatus. Pore solution, which is obtained from concrete, mortar and paste, is also used to determine its formation factor and monitor chemical reactions. It is also used to measure the air-void system of fresh concrete. For analyzing moisture content in concrete, a concrete laboratory may also conduct a chemical reaction analysis using an x-ray fluorescence spectrometer.
The laboratory tests of concrete include chemical analysis of core samples, dust, and lumps. These tests provide critical information about the quality of concrete and can be used to estimate its life span. They also allow decision makers to determine which steps need to be taken to protect or repair a structure. So, while these tests are important, they are not sufficient on their own. They are necessary to ensure the safety of the construction and its inhabitants. And a concrete investigation is vital to protect a building's integrity.
Another type of test used to evaluate the flow properties of concrete is called the slump test. It involves placing concrete into an inverted cone and turning it upside down to see if the concrete holds its shape. To pass the slump test, the concrete must have a true slump. It should hold the same shape for at least three minutes before subsiding to the ground. A slump height of three thousand to 8000 psi is ideal for workability and consistency.
Cracks in concrete can be caused by a number of factors, including moisture levels. These conditions determine the speed of deterioration processes. In general, cracks in concrete can be a symptom of a poor air void system. Cracks that are deep and visible in concrete can indicate problems with the reinforcement. However, cracks that are only visible to the naked eye can be a sign of deterioration. Further, cracks may indicate a structural problem.
A forensic inspection of a concrete sample is a critical part of a case. It can help determine the cause of failure and establish culpability. The failure analysis process at Lucideon involves a site investigation and a laboratory evaluation. We are a UKAS-accredited testing lab for many tests to BS 1881. Our testing services can help you decide if you should conduct a concrete investigation. The benefits of concrete inspection are significant.