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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Typical <strong>Shotcrete</strong> Per<strong>for</strong>m<strong>an</strong>ce Requirements<br />
Test Method<br />
-<br />
CSA A23.2 – 5C<br />
-<br />
CSA A23.2 – 4C<br />
Penetrometer as calibrated<br />
against beams tested as<br />
equivalent cubes<br />
ASTM C1604 & CSA A23.2 –<br />
14C<br />
ASTM C642<br />
ASTM C1550<br />
Air content – as shot<br />
Property<br />
Maximum water/cementing materials ratio<br />
Slump<br />
(at discharge into shotcrete pump)<br />
Temperature<br />
(at discharge into shotcrete pump)<br />
Minimum early age compressive strength<br />
be<strong>for</strong>e re-entry under shotcrete<br />
Minimum compressive strength of<br />
shotcrete cores<br />
1 Day<br />
7 Days<br />
28 Days<br />
Maximum values of boiled absorption<br />
Maximum volume of permeable voids<br />
Minimum Joules energy at 40 mm<br />
deflection in round p<strong>an</strong>el test<br />
Per<strong>for</strong>m<strong>an</strong>ce Requirement<br />
0.40<br />
170 ±20 mm<br />
10-30 o C<br />
2-5 %<br />
2 MPa<br />
10MPa<br />
30 MPa<br />
40 MPa<br />
9 %<br />
18 %<br />
*
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