Shotcrete Quality Control and Testing for an Underground ... - saimm
Shotcrete Quality Control and Testing for an Underground ... - saimm
Shotcrete Quality Control and Testing for an Underground ... - saimm
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Hardened <strong>Shotcrete</strong> QC <strong>Testing</strong><br />
Test Method<br />
Ref. 1<br />
Penetrometer<br />
ASTM C1140<br />
ASTM C1604<br />
ASTM C642<br />
ASTM C1550<br />
ASTM C1550<br />
Test Description<br />
Early age compressive strength of beams as<br />
equivalent cubes<br />
Early age compressive strength estimate<br />
using penetrometer<br />
Compressive strength of cores extracted<br />
from shotcrete test p<strong>an</strong>el at age 1 day (1<br />
core), 7 days (1 core) <strong><strong>an</strong>d</strong> 28 days (2 cores)<br />
Boiled absorption <strong><strong>an</strong>d</strong> volume of permeable<br />
voids<br />
Round p<strong>an</strong>el test to 40mm deflection<br />
Round p<strong>an</strong>el test to 40 mm deflection<br />
<strong>Testing</strong> Frequency<br />
At start of project <strong><strong>an</strong>d</strong> with <strong>an</strong>y<br />
ch<strong>an</strong>ge in mixture proportions or<br />
accelerator type or dosage<br />
One heading per shift<br />
One heading per week <strong>for</strong> each<br />
shotcrete robot <strong><strong>an</strong>d</strong> each<br />
shotcrete crew used<br />
One heading per week <strong>for</strong> each<br />
shotcrete robot used<br />
Two p<strong>an</strong>els at each of ages 7<br />
<strong><strong>an</strong>d</strong> 28 days at start of project<br />
<strong>for</strong> one fibre type <strong><strong>an</strong>d</strong> dosage<br />
Two p<strong>an</strong>els at 28 days <strong>for</strong> each<br />
week of shotcrete production or<br />
at <strong>an</strong>y ch<strong>an</strong>ge in fibre type or<br />
dosage
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