<div dir="ltr"><div><div><div><div>Here you go:<br><a href="http://prestonfeather.com/wp-content/uploads/2014/11/Web_Resistance_Values.pdf">prestonfeather.com/wp-content/uploads/2014/11/Web_Resistance_Values.pdf</a><br><br>I googled "heat resistance value of sand" and it was the second hit.<br><br></div>Note that it has an R value per inch for sand and gravel concrete of 0.08 per inch, and <br></div>and R value for 8" hollow core concrete blocks of 1.11 (sand and gravel aggregate), or 0.13 per inch.<br><br></div>You could make an educated guess that the R value for gravel with 40% voids would be close to 0.1 per inch,<br>or 2.4 for 24 inches (Imperial units).<br><br></div>Norbert<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Dec 7, 2015 at 7:02 PM, Alan Abrams <span dir="ltr"><<a href="mailto:alan@abramsdesignbuild.com" target="_blank">alan@abramsdesignbuild.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Nobert--<div><br></div><div>my "look-up" skills may admittedly be deficient, but I could not find a reliable citation on the internet, and not even in my tattered 8th Edition of the AGS...</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>aa</div></font></span></div><div class="gmail_extra"><span class=""><br clear="all"><div><div><div dir="ltr"><font size="2"><font size="2"><span style="color:rgb(102,0,0)">Alan Abrams</span></font><b style="color:rgb(102,0,0)"><br></b><i><span style="color:rgb(102,102,102)">certified professional building designer, AIBD<br>certified passive house consultant, PHIUS</span></i></font><div><i><span style="color:rgb(102,102,102)">certified passive house builder, PHIUS</span></i><font size="2"><span style="color:rgb(102,0,0)"><font color="#666666"><i><br></i></font></span></font><font style="color:rgb(102,102,102)" size="1"><font size="2">cell </font></font><font style="color:rgb(102,102,102)" size="1"><font size="2"><a href="tel:202-437-8583" value="+12024378583" target="_blank">202-437-8583</a></font></font><font style="color:rgb(102,102,102)" size="1"><font size="2"><br>
<a style="color:rgb(102,102,102)" href="mailto:alan@abramsdesignbuild.com" target="_blank">alan@abramsdesignbuild.com</a><br style="color:rgb(102,102,102)"></font></font><a href="http://www.heliconworks.com/index2.html" target="_blank">HELICON WORKS <i>Achitecture and Education</i></a></div></div></div></div>
<br></span><div><div class="h5"><div class="gmail_quote">On Mon, Dec 7, 2015 at 5:26 PM, Norbert Senf <span dir="ltr"><<a href="mailto:norbert.senf@gmail.com" target="_blank">norbert.senf@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Right, I was only addressing the "heat capacity expressed as MJ(m^3K)" part of the question. R value of gravel is a look-up value............N<br><div><br></div></div><div class="gmail_extra"><div><div><br><div class="gmail_quote">On Mon, Dec 7, 2015 at 2:42 PM, Nick Pine <span dir="ltr"><<a href="mailto:nick_pine@verizon.net" target="_blank">nick_pine@verizon.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Norbert Senf <<a href="mailto:norbert.senf@gmail.com" target="_blank">norbert.senf@gmail.com</a>> writes:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
... the specific heat would be .14 MJ/m3-K<br>
</blockquote>
<br>
I'm afraid that has nothing to do with R-value.<span><font color="#888888"><br>
<br>
Nick</font></span><div><div><br>
<br>
<br>
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