AR Field & VNA Testing and Grinding
It is a fact that E-Commerce is changing the way we live our lives and conduct business. Through warehouse construction, to daily commerce, and even a pandemic, E-Commerce has provided businesses and customers the capability of receiving goods faster and more conveniently than any point in our history. This has driven change in how warehouses are designed and operate.
To meet and/or exceed these requirements not only improves safety, but also improves case pick rates, travel speed, employee morale, and maintenance costs. To miss these requirements or be assigned incorrect values will cause loss of productivity, speed, safety/injuries, accelerated wear characteristics of the slab, and can cause downtime because of issues with sensors in the robotics. Understanding how each of these impact performances is critical for your ROI.
Types of testing to achieve the requirements above:
• Surface Gloss (GU)
• Haze (HU)
• Distinctiveness of Image (DOI)
• Friction / Dynamic Coefficient of Friction (DCOF)
• Roughness (RA)
*Flatness – is a measurement of how bumpy or smooth a slab is. Think crest of wave to crest of wave. It factors the height (amplitude) and the distance between the crests.
- This is controlled by finishing
- Can be corrected by grinding but there are conditions to this:
FF 25 will have a single 1/4" defect across 10-feet
FF 50 will have a single 1/8" defect across 10-feet
FF 100 will have a single 1/16" defect across 10-feet
*Levelness – is the average change in elevation over a longer distance. Levelness depicts how closely the finished floor matches the intended slope provided in the design documents.
- This is controlled by screeding
- Levelness is only measured for slab on grade as elevated slabs can potentially sag
•Elevated slabs need to be assessed before shoring and forms are removed
*Gloss – Measurement proportional to the amount of light reflected from a surface determining how shiny a surface appears.
- All gloss levels are measured using the standard angle of 60°. This angle is used alongside angles 85° (Low Gloss) and 20° (High Gloss)
- Used to be the primary method of measuring a polished floor.
*Distinctiveness of Imagining (DOI) – Indicates how sharply an image is reflected in the floor
- DOI can tell a contractor how much light a floor reflects, but it cannot tell you why the light is being reflected – It cannot tell someone if their floor is polished to spec.
*Roughness (RA) – Is the value of roughness of the slab
- This is becoming the preferred method of measuring a polished floor
- T Meter can read concrete texture in three parameters: STG (Surface Texture Grade) as described in CSDA Standard ST115, RA (Roughness Average), and CSP 1-6 as ICRI defined parameters of concrete surface profiles
•Design professionals can now specify by measurable numbers their expectations for concrete floor finishes.
*Haze (HU) – Haze causes a drop in reflected contrast and is the cause of halos
*Dynamic Coefficient of Friction (DCOF) – Measures a surface’s slip resistance DURING motion
- DCOF standard for porcelain ceramic tile is 0.42
- To be tested with a BOT3000
DURABLE SURFACES – Your Partner in Testing and Quality