No. Data collection on GS8000 is triggered by wheel movement. If you do not move the radar, then no data collection is happening. The wheel is...
No. Data collection on GS8000 is triggered by wheel movement. If you do not move the radar, then no data collection is happening. The wheel is acting also as an odometer, giving local coordinates on the x-axis direction.
The Screening Eagle ID is the login credentials you use in order to access any and all of our apps. Importantly for all customers and users who...
The Screening Eagle ID is the login credentials you use in order to access any and all of our apps. Importantly for all customers and users who signed up before May 2021 with a Proceq Live account, there is NO change for you other than the name and all our apps work as usual with your login details.
You don’t have a Screening Eagle ID yet? Don’t worry, just go to our website or download any of our apps and create your own, unique and personal Screening Eagle ID right away. And of course, it’s for FREE. With our single sign-on you can access all our software and experience the magic of our solutions!
The maximum depth you can efficiently see with GPR is dependent on:
Our Proceq GPRs can detect size and depth of objects up to 80 cm in concrete and up to 10 meters in subsurface applications. Take a look at this example of a subsurface GPR inspection of a carpark with challenging ground conditions.
The formulae used in the compressive strength correlation curves in the OS8000 and OS8200 rebound hammers can be found in the Schmidt Hammer...
The formulae used in the compressive strength correlation curves in the OS8000 and OS8200 rebound hammers can be found in the Schmidt Hammer Conversion Curve Database below:
1. Original Schmidt OS8000 Type N
Curve
Min R
Max R
Unit
Form factor
Equation
Proceq B (14 - 56 day mean)
15
55
N/mm2
150 mm cube
Fck = 1.05 x ( 0.01078R2 + 0.904R - 12.91)
Proceq A (7 days mean)
Fck = 1.05 x ( 0.012516R2 + 0.706R - 7.49)
Portland Cement J
kg/cm2
Fck = 1.05 x ( 0.133R2 +8.82R - 122)
Early strength J
Fck = 1.05 x ( -0.0803R2 + 20R - 253)
Blast Furnace J
Fck =1.05 x ( 0.2R2 + 1.83R + 22.4)
Averag Curve J
Fck = 1.05 x ( 0.0485R2 + 12.3R - 146)
Characteristic strength R
10
95
Step function (see below)
The characteristic strength curve is based on the reference table for the screening test provided in the Annex to EN13791. This curve provides a safe estimate with <5% probability of over-estimating the strength.
R value - Strength (N/mm2) 20 to 29 - <10 30 to 32 - 10 33 to 34 - 15 35 to 37 - 20 38 to 39 - 25 40 to 42 - 30 43 to 46 - 37 47 to 48 - 45 49 to 50 - 50 51 to 52 - 55 53 to 56 - 60 57 to 59 - 67 60 to 64 - 75 65 to 68 - 85 69 to 75 - 95
Impact angle conversion is applied to the measured R value before calculation of the compressive strength according to these curves. The impact angle correction is based on this formula:
Rcorr=R +(-a0+R*a1)*sin(angle)
a1+
0.08
a0+
7.1
a1-
0.043
a0-
4.3
Take a0+ and a1+ for angles >= 0°, a0- and a1- for angles < 0°
Min Q
Max Q
< 10% (old)
22
75
fck = 2.77e^0.048Q
Ref EU (old)
21
62
fck = 1.8943e^0.064Q
Ref CN
20
fck = 0.0244Q^2-0.6129Q+10
Ref RUS
77
fck = 0.03Q^2-0.86Q+9.5
Mean strength
fck = 3.6473e^0.0475Q
Characteristic strength Q
No angle correction is required for measurements with the Silver Schmidt.
Note! The Ref EU curve was determined with very high quality concrete and gives very high strengths.
Q value - Strength (N/mm2) 10 to 33 - <10 34 to 39 - 10 40 to 44 - 15 45 to 48 - 20 49 to 51 - 25 52 to 55 - 30 56 to 59 - 37 60 to 61 - 45 62 to 63 - 50 64 to 65 - 55 66 to 67 - 60 68 to 70 - 67 71 to 72 - 75 73 to 74 - 85 75 to 80 - 95
GPR can detect metallic and non-metallic targets below the surface. However, certain limitations exist, like the depth to target limitation. The...
GPR can detect metallic and non-metallic targets below the surface. However, certain limitations exist, like the depth to target limitation. The rule of thumb is that GPR can detect almost any target if it is at least one inch (2.54cm) in diameter and is buried at one foot (0.30m) or shallower. For example, it may be impossible for GPR to locate a 3-inches (7.6cm) plastic pipe down to 6 (1.82m) feet depth. Metallic targets are doing better with this rule.
In concrete applications, ground penetrating radar (GPR) can achieve sub-centimeter accuracy when detecting rebars and post-tension cables...
In concrete applications, ground penetrating radar (GPR) can achieve sub-centimeter accuracy when detecting rebars and post-tension cables embedded in concrete within the first 60 to 80cm. In subsurface applications, GPR can see pipes, trenches, geological layers up to a maximum of 10 meters. These values are estimated and depend on each particular situation and the GPR system used. For example, the higher the water and salt content in a material, the shallower a radar penetrates the ground. Hence GPR can penetrate older, drier concrete better than it does young concrete that is not well cured.
Proceq is now part of Screening Eagle Technologies. Screening Eagle is a merger of Dreamlab, a Singapore-based software and robotics company and Proceq, a Swiss-based NDT company with a 65+ year heritage as a market leader in portable sensors. Together, we protect the built world with software, sensors and data.
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