Post Reply 
 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
RH Test Hole Callout
09-26-2008, 09:40 AM
Post: #1
RH Test Hole Callout
I'm following the spec to put a test hole in the slab every 1000 sq ft after putting 3 test holes in the first 1000 sq ft. What is the rational for the 1000 sq ft callout?
Find all posts by this user
Quote this message in a reply
09-26-2008, 01:58 PM
Post: #2
RE: RH Test Hole Callout
(09-26-2008 09:40 AM)Ben Wrote:  I'm following the spec to put a test hole in the slab every 1000 sq ft after putting 3 test holes in the first 1000 sq ft. What is the rational for the 1000 sq ft callout?

For the CaCl2 testing it is to establish a base line. I do not know why for the RH probes because they are calbrated and supposed to be maintained that way.
Rayt
Find all posts by this user
Quote this message in a reply
10-27-2008, 08:21 AM
Post: #3
RE: RH Test Hole Callout
Ben,
I talked with someone that had this explained to him by a member of the ASTM committee in this way… three test holes in the first 1000 sq. ft. to better insure you’re getting a good RH reading in case one probe is on a piece of aggregate and won’t read correctly. A test hole in each additional 1000 sq. ft. is based on the amount a truckload typically carries to pour. This would help identify those mixes that vary with water to cement ratios.
Find all posts by this user
Quote this message in a reply
11-04-2008, 10:03 AM
Post: #4
RE: RH Test Hole Callout
(09-26-2008 09:40 AM)Ben Wrote:  I'm following the spec to put a test hole in the slab every 1000 sq ft after putting 3 test holes in the first 1000 sq ft. What is the rational for the 1000 sq ft callout?

Ben,
The rational for testing for every 1,000 s/f is; it represents the amount of concrete per truck load. A truck load of concrete will cover approximately 800 - 1,000 s/f 4-inches thick.
Regards
Rayt
Find all posts by this user
Quote this message in a reply
Post Reply 


[-]
Share/Bookmark (Show All)
Facebook Twitter Linkedin Technorati Digg MySpace Delicious