Concrete scanning is used to inspect concrete slabs or columns prior to drilling or boring in renovations and new construction projects. ACS Underground Solutions' concrete scans are completed using ground penetrating radar (GPR) technology for fast and accurate inspections. GPR is safe and non-invasive; using transmitted waves and their reflected signals, we can analyse the subsoil for embedded objects. When it comes to finding out what is inside a concrete slab, non-destructive options are often the first choice.
The two main options are the use of X-rays or ground penetrating radar (GPR) to 'see inside the concrete slab or structure'. Both options allow a closer look at what is inside, including reinforcing bars, ducts, post-tensioning cables, etc. Most of what I know about working with concrete I learned by working for someone else, attending training classes or by trial and error (with more mistakes than I like to admit). I started the CONCRETE UNDERGROUND to make sure I didn't have to make all the same mistakes I made or spend thousands of dollars for training classes that don't give you real "on the job experience.
Concrete less than one year old that may be exposed to chlorides should have a sealer designed specifically for concrete to help prevent freeze damage. The accumulation of salts on the surface of concrete attracts water, which, according to the laws of physics, is attracted to high salt concentrations to achieve equilibrium of the salt solution by dilution. In hot, dry environments, the subgrade must be wetted before concrete is placed, and the surface must be kept moist to prevent it from drying out too quickly. ACS Underground Solutions serves CT, NY, NJ, MA and RI to find hidden objects or abnormalities prior to concrete core drilling or saw cutting.
Concrete also makes up the largest proportion of construction and demolition waste, accounting for approximately one-third of all landfill waste. These capillary voids weaken the concrete and make it more absorbent, increasing the potential for freeze damage and attack by liquid chemicals. Using proper construction methods that avoid this problem, a capillary break is installed at the top of the subgrade before the concrete is poured. Concrete foundations must be designed to resist the forces created by subsoil problems, including settlement and uplift.
Some types of concrete are designed to maximise control joint spacing, but inspectors will not be able to identify these mixtures visually, and if shrinkage cracking and control joint spacing appear excessive, the cracking is probably related to spacing. The following two photos show concrete of approximately the same age containing aggregates that react differently to moisture. Although concrete radiography is an older form of technology, it is extremely effective in providing clear images. It is for concrete workers who want to learn more about pouring and finishing concrete to hone their skills and make them more valuable to their company.
In this type of blowout, the initial breakage actually occurs in the aggregate, and some of the aggregate separates and becomes attached to the detached concrete cone.