proceq Profometer PM8000 Pro User Guide

proceq Profometer PM8000 Pro

Practical Method for Assessing Cover Readings

• The German Concrete and Construction Association (Deutscher Beton- und Bautechnik-Verein,DBV) have published a practical guideline for assessing concrete cover on real structures.
• The minimum concrete cover cmin is to be substantiated as:
  • 10%-quantile for elements according to DIN 1045-1, table 4 row 1 [R1] (XC1)
  • 5%-quantile for elements according to DIN 1045-1, table 4, rows 2-4 [R1]. (XC2-XC4)

Measurement Surfaces

The following concrete structure surfaces are to be differentiated as measurement surfaces:

• each side of a wall
• the upper side of a ceiling
• the under side of a ceiling
• the sides of rectangular pillars
• the vertical sides of a beam
• the under side of a beam
• the upper side of a beam

Each measurement surface equates to a basic population.
As a minimum 20 measurements are required for each surface.

• The German Concrete and Construction Association ( D eutscher B eton und Bautechnik V erein, DBV) have published a practical guideline for assessing concrete cover on real structures.
• The minimum concrete cover c min is to be substantiated as:
  • 10 quantile for elements according to DIN 1045 1 , table 4 row 1 [R 1 ] (XC 1
  • 5 quantile for elements according to DIN 1045 1 , table 4 , rows 2 4 [R 1 ]. (XC 2 XC 4

DBV Evaluation Requirements

• The Neville distribution is the basis for the statistical evaluation.
• It’s usability has been proven by carrying out parameter studies on finished structural elements.
• Each measurement surface (see previous slide) equates to a basic population.
• As a minimum 20 measurements are required for each surface.
• For the quantitative evaluation, after acquiring all of the measurement values, the first step is to determine the median X M.
• Following this, in order to increase the validity, an upper boundary value X OG is calculated from the median X M and the smallest measured value X min to be used for the evaluation of the measured values X i
• Measurement values that exceed this upper boundary value, are to be excluded and the quantitative analysis will be carried out with the reduced measurement series.

DBV Evaluation Procedure

DBV statistics feature

• Relevant statistics without further processing
• for efficient and informed decision making

Better decisions with advanced statistics

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