Everything You Need To Know About New and Old Concrete
Prior to applying a coating system, if you fail to identify and document mistakes in concrete repair, it will eventually result in losses. Experience with coating doesn’t only help, but one needs to understand how the crack the code on the application of coatings. This article will enlighten you about the same.
There are a plethora of advantages in working on a newly constructed site. The history of the concrete pour has always been taken into consideration. You can refer specifications, drawings, and the concrete or general contractor for the same.
Ask the latter good questions, maintain good notes, take pictures and performing tests are good factors to ensure the success rate of flooring project. Some important information may include:
- The specification section(s) taking into account the mix design, slab thickness, subbase, compaction, steel reinforcement, and moisture barrier/retarder for the particular area to be coated.
- The specification coating the flooring system to be applied.
- The soil report for the worksite.
- A copy of the submittal for any needed moisture barrier or retarder.
- Identification of contraction, construction, expansions, joints, etc.
- Verification that the contraction joint plan was followed.
- Repair requirements for cracks (don’t assume this is your work).
- Noted time lapse between the concrete pour and troweling or cutting the joints.
- Depth measurements of the joints.
- Sounding at the side of joints, re-entrant corners, and slab ends to detect areas where the slab is not in contact with the subbase.
- Approved flooring material submittals and detailed installation instructions
If you wish to solicit information on older concrete slabs, it is a laborious task as the data may have been lost over time. When most of the contracts are out of place or simply missing, it is crucial to go for visual inspection and testing. You can also consider the following steps.
- Core drilling over the cracked part and determining the type of cracks visible, ascertain and taking note of the thickness of the slab, to check if a vapour barrier/retarder was installed and to check the subbase and construction practices put into work.
- Transferring the cores to the testing departments to ascertain if the contaminants are known or suspected or if it is punky or chalky in texture. The place where the joints are actually located is where the contaminants show up in the first place when a floor is finished.