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106.3.2.86 TM-86 Preparation of Samples for Surface Sealer Wet Track Abrasion - Revision history
2024-03-28T21:04:43Z
Revision history for this page on the wiki
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Smithk: /* 106.3.2.86.4 Calculation */
2020-01-28T13:07:48Z
<p><span dir="auto"><span class="autocomment">106.3.2.86.4 Calculation</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 13:07, 28 January 2020</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l67" >Line 67:</td>
<td colspan="2" class="diff-lineno">Line 67:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>4. Calculate the abrasion loss (g/m<sup>2</sup>) of the sample using this equation:</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>4. Calculate the abrasion loss (g/m<sup>2</sup>) of the sample using this equation:</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>::Abrasion Loss = <math>\frac{(Cured\, Casting\, Total\, Weight\, -\, Cured\, Abraded\, Weight}{Abrasion\, Wear\, Area} * 10,000</math></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>::Abrasion Loss = <math>\frac{(Cured\, Casting\, Total\, Weight\, -\, Cured\, Abraded\, Weight<ins class="diffchange diffchange-inline">)</ins>}{Abrasion\, Wear\, Area} * 10,000</math></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
</table>
Smithk
https://epg.modot.org/index.php?title=106.3.2.86_TM-86_Preparation_of_Samples_for_Surface_Sealer_Wet_Track_Abrasion&diff=35881&oldid=prev
Smithk: /* 106.3.2.86.3 Procedure */
2015-06-30T15:54:54Z
<p><span dir="auto"><span class="autocomment">106.3.2.86.3 Procedure</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<col class="diff-marker" />
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 15:54, 30 June 2015</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l39" >Line 39:</td>
<td colspan="2" class="diff-lineno">Line 39:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[image:106.3.2.86 casting knife profile.jpg|right|225px|thumb|<center>'''Casting Knife profile'''</center>]]</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[image:106.3.2.86 casting knife profile.jpg|right|225px|thumb|<center>'''Casting Knife profile'''</center>]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:a. Casting knife has been set to a depth of 50 mils (0.0127 cm).</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:a. Casting knife has been set to a depth of 50 mils (0.0127 cm).</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>:b. The knife edge is facing down and the edge stops are facing the tester. (Casting knives with bevel edge must face tester to draw sample properly<del class="diffchange diffchange-inline">)</del>. See <del class="diffchange diffchange-inline">Figure 2</del>.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>:b. The knife edge is facing down and the edge stops are facing the tester. (Casting knives with bevel edge must face tester to draw sample properly. See <ins class="diffchange diffchange-inline">figure to the right</ins>.<ins class="diffchange diffchange-inline">) </ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>4. Place 50-100 grams of sealer on the felt just in front of the knife edge and spread it from side to side to even out the material depth. Enough material should be placed to allow the sample to make a smooth even casting over enough area to cover the WTAT abrasion head wear pattern.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>4. Place 50-100 grams of sealer on the felt just in front of the knife edge and spread it from side to side to even out the material depth. Enough material should be placed to allow the sample to make a smooth even casting over enough area to cover the WTAT abrasion head wear pattern.</div></td></tr>
</table>
Smithk
https://epg.modot.org/index.php?title=106.3.2.86_TM-86_Preparation_of_Samples_for_Surface_Sealer_Wet_Track_Abrasion&diff=35880&oldid=prev
Smithk at 15:54, 30 June 2015
2015-06-30T15:54:01Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<col class="diff-marker" />
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 15:54, 30 June 2015</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l12" >Line 12:</td>
<td colspan="2" class="diff-lineno">Line 12:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>2. Drawdown plate (WTAT Prep Glass) capable of holding drawdown felt in place for casting.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>2. Drawdown plate (WTAT Prep Glass) capable of holding drawdown felt in place for casting.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[image:106.3.2.86 casting knife.jpg|right|<del class="diffchange diffchange-inline">225px</del>|thumb|<center>'''Casting Knife'''</center>]]</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[image:106.3.2.86 casting knife.jpg|right|<ins class="diffchange diffchange-inline">245px</ins>|thumb|<center>'''Casting Knife'''</center>]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>3. Casting knife 12 inches wide; capable of making smooth, even draw of liquid sealer sample. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>3. Casting knife 12 inches wide; capable of making smooth, even draw of liquid sealer sample. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l37" >Line 37:</td>
<td colspan="2" class="diff-lineno">Line 37:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>3. Verify that the casting knife is wide enough to cover the long edge of the WTAT drawdown felt. Place casting knife on the top edge of the drawdown felt just below the clip and verify the following:</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>3. Verify that the casting knife is wide enough to cover the long edge of the WTAT drawdown felt. Place casting knife on the top edge of the drawdown felt just below the clip and verify the following:</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[image:106.3.2.86 casting knife profile.jpg|right|<del class="diffchange diffchange-inline">205px</del>|thumb|<center>'''Casting Knife profile'''</center>]]</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[image:106.3.2.86 casting knife profile.jpg|right|<ins class="diffchange diffchange-inline">225px</ins>|thumb|<center>'''Casting Knife profile'''</center>]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:a. Casting knife has been set to a depth of 50 mils (0.0127 cm).</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:a. Casting knife has been set to a depth of 50 mils (0.0127 cm).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:b. The knife edge is facing down and the edge stops are facing the tester. (Casting knives with bevel edge must face tester to draw sample properly). See Figure 2.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:b. The knife edge is facing down and the edge stops are facing the tester. (Casting knives with bevel edge must face tester to draw sample properly). See Figure 2.</div></td></tr>
</table>
Smithk
https://epg.modot.org/index.php?title=106.3.2.86_TM-86_Preparation_of_Samples_for_Surface_Sealer_Wet_Track_Abrasion&diff=35877&oldid=prev
Smithk at 15:52, 30 June 2015
2015-06-30T15:52:46Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 15:52, 30 June 2015</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l12" >Line 12:</td>
<td colspan="2" class="diff-lineno">Line 12:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>2. Drawdown plate (WTAT Prep Glass) capable of holding drawdown felt in place for casting.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>2. Drawdown plate (WTAT Prep Glass) capable of holding drawdown felt in place for casting.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">[[image:106.3.2.86 casting knife.jpg|right|225px|thumb|<center>'''Casting Knife'''</center>]]</ins></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>3. Casting knife 12 inches wide; capable of making smooth, even draw of liquid sealer sample. <del class="diffchange diffchange-inline">See Figure 1</del></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>3. Casting knife 12 inches wide; capable of making smooth, even draw of liquid sealer sample. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>4. Roofing felt (30-45 lb. strength).</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>4. Roofing felt (30-45 lb. strength).</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l37" >Line 37:</td>
<td colspan="2" class="diff-lineno">Line 37:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>3. Verify that the casting knife is wide enough to cover the long edge of the WTAT drawdown felt. Place casting knife on the top edge of the drawdown felt just below the clip and verify the following:</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>3. Verify that the casting knife is wide enough to cover the long edge of the WTAT drawdown felt. Place casting knife on the top edge of the drawdown felt just below the clip and verify the following:</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">[[image:106.3.2.86 casting knife profile.jpg|right|205px|thumb|<center>'''Casting Knife profile'''</center>]]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:a. Casting knife has been set to a depth of 50 mils (0.0127 cm).</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:a. Casting knife has been set to a depth of 50 mils (0.0127 cm).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:b. The knife edge is facing down and the edge stops are facing the tester. (Casting knives with bevel edge must face tester to draw sample properly). See Figure 2.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:b. The knife edge is facing down and the edge stops are facing the tester. (Casting knives with bevel edge must face tester to draw sample properly). See Figure 2.</div></td></tr>
</table>
Smithk
https://epg.modot.org/index.php?title=106.3.2.86_TM-86_Preparation_of_Samples_for_Surface_Sealer_Wet_Track_Abrasion&diff=35876&oldid=prev
Smithk: Per CM, new MoDOT Test Method
2015-06-30T15:30:52Z
<p>Per CM, new MoDOT Test Method</p>
<p><b>New page</b></p><div>The purpose of this test method is to outline the process and procedure for making and testing Wet Track Abrasion Samples based on International Slurry Surfacing Association (ISSA) TB-100. Method ISSA TB-100 measures the wearing qualities of pavement sealer systems under wet abrasion conditions.<br />
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===106.3.2.86.1 Definitions===<br />
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'''WTAT''' – Wet Track Abrasion Test <br />
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'''WTAT prep glass''' – Glass plate with dimensions of 30 cm x 30 cm x 1.27 cm that is equipped with a clipboard clip at the top to hold the sample drawdown felt in place.<br />
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===106.3.2.86.2 Equipment===<br />
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1. Equipment needed as outlined in ISSA TB-100.<br />
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2. Drawdown plate (WTAT Prep Glass) capable of holding drawdown felt in place for casting.<br />
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3. Casting knife 12 inches wide; capable of making smooth, even draw of liquid sealer sample. See Figure 1<br />
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4. Roofing felt (30-45 lb. strength).<br />
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5. Balance capable of weighing 5,000 grams to within 0.1 gram.<br />
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6. Liquid sealer sample needing to be tested.<br />
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7. Wash bottle equipped with narrow mouth to control water flow.<br />
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8. Sealer stirring mechanism capable of homogenous mixing of material.<br />
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9. Soft, absorbent paper towel or cloth towels.<br />
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===106.3.2.86.3 Procedure===<br />
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1. Cut a piece of 30-45 lb. roofing felt to measure 29 cm X 35 cm. Flatten roofing felt substrate and dry in a 50°C oven overnight.<br />
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2. Place roofing felt on a support base capable of holding felt in a flat position that will prevent felt from moving. WTAT prep glass works well as the support base with hold down. <br />
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:a. Place the long side of the felt at the top of the support base under the hold down mechanism.<br />
:b. Make sure the near edge of the felt is at or just over the near edge of the table or bench it rests on to allow a slight overhang of the felt to allow excess cast sealer to fall off the sample felt when drawn.<br />
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3. Verify that the casting knife is wide enough to cover the long edge of the WTAT drawdown felt. Place casting knife on the top edge of the drawdown felt just below the clip and verify the following:<br />
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:a. Casting knife has been set to a depth of 50 mils (0.0127 cm).<br />
:b. The knife edge is facing down and the edge stops are facing the tester. (Casting knives with bevel edge must face tester to draw sample properly). See Figure 2.<br />
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4. Place 50-100 grams of sealer on the felt just in front of the knife edge and spread it from side to side to even out the material depth. Enough material should be placed to allow the sample to make a smooth even casting over enough area to cover the WTAT abrasion head wear pattern.<br />
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5. Gently pull the casting knife smoothly and evenly at a moderate speed to create a casting of sealer material that is even in depth and smooth all the way across. Allow excess material to fall off the edge of the felt into a waste container or receiving vessel.<br />
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6. Clean the casting knife with clean tap or distilled water, making sure not to get the micrometer dials wet. Dry the knife area with a soft, absorbent paper towel or a cloth towel.<br />
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7. Place cast sample in a 60°C forced air oven and dry to constant weight according to ISSA TB-100.<br />
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8. Remove cast sample from oven and let cool for at least 5 minutes. Record weight of cured cast sample as Cured Casting Total Weight.<br />
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9. Fully submerge cured cast sample in 25°C tap water bath for 3-day soak.<br />
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10. Promptly remove cured cast sample from water bath and place in WTAT abrasion test pan by pressing soaked felt sample flat all the way to the pan edges. Ensure felt is pressed well into the pan bottom and around the edges of the test pan.<br />
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11. Follow ISSA TB-100 steps 5.9 and 7.3-7.7 for abrasion testing of soaked cured cast sample and post abrasion drying.<br />
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===106.3.2.86.4 Calculation===<br />
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1. Record the weight (grams) of cured cast sample as Cured Casting Total Weight.<br />
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2. Record weight (grams) of abraded cast sample as Cured Abraded Weight.<br />
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3. Determine the mean diameter (cm) of the abrasion pattern on a series of test samples and calculate the mean abrasion wear area in cm<sup>2</sup>.<br />
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4. Calculate the abrasion loss (g/m<sup>2</sup>) of the sample using this equation:<br />
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::Abrasion Loss = <math>\frac{(Cured\, Casting\, Total\, Weight\, -\, Cured\, Abraded\, Weight}{Abrasion\, Wear\, Area} * 10,000</math><br />
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[[Category:106.3.2 Material Inspection Test Methods]]</div>
Smithk