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	<title>Jereghi Petru</title>
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		<title>Jereghi Petru</title>
		<link>http://materialedeconstructie.wordpress.com</link>
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		<item>
		<title>Consistenţa betonului proaspăt</title>
		<link>http://materialedeconstructie.wordpress.com/2011/06/27/consistenta-betonului-proaspat/</link>
		<comments>http://materialedeconstructie.wordpress.com/2011/06/27/consistenta-betonului-proaspat/#comments</comments>
		<pubDate>Mon, 27 Jun 2011 13:35:46 +0000</pubDate>
		<dc:creator>legoals</dc:creator>
				<category><![CDATA[Materie pentru beton]]></category>
		<category><![CDATA[beton]]></category>
		<category><![CDATA[beton greu]]></category>
		<category><![CDATA[consistenta]]></category>
		<category><![CDATA[materiale de constructie]]></category>
		<category><![CDATA[ve-be]]></category>

		<guid isPermaLink="false">http://materialedeconstructie.wordpress.com/?p=331</guid>
		<description><![CDATA[Consistenta &#8211; se poate defini prin mobilitatea betonului proaspăt sub acţiunea masei proprii sau unor forte exterioare care acţionează asupra lui. Se poate determina prin următoarele metode (de regula in funcţie de diametrul maxim al agregatelor): tasarea conului; remodelarea VE-BE; determinarea gradului de compactare Waltz; răspândirea.   Con tasare 1-formă; 2-mâner de prindere; 3-plăcuţe de [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=materialedeconstructie.wordpress.com&amp;blog=12129902&amp;post=331&amp;subd=materialedeconstructie&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p><span style="color:#000080;"><strong>Consistenta</strong></span><span style="color:#800000;"> &#8211; <strong>se poate defini prin mobilitatea betonului proaspăt sub acţiunea masei proprii sau unor forte exterioare care acţionează asupra lui.</strong></span></p>
<p><span style="color:#800000;">Se poate determina prin următoarele metode (de regula in funcţie de diametrul maxim al agregatelor):</span></p>
<ul>
<ul>
<li><span style="color:#800000;">tasarea conului;</span></li>
<li><span style="color:#800000;">remodelarea VE-BE;</span></li>
<li><span style="color:#800000;">determinarea gradului de compactare Waltz;</span></li>
<li><span style="color:#800000;">răspândirea.</span></li>
</ul>
</ul>
<p align="center"><span id="more-331"></span></p>
<p align="center"><span style="color:#800000;"><strong> </strong></span></p>
<p align="center"><span style="color:#800000;"><strong>Con tasare</strong></span></p>
<p align="center"><span style="color:#800000;">1-formă; 2-mâner de prindere; 3-plăcuţe de imobilizare; 4-placă netedă (neabsorbantă);   5-prelungitor.</span></p>
<p align="center">
<table border="1" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td valign="top" width="68">
<p align="center"><span style="color:#800000;"><strong>Clasa</strong></span></p>
</td>
<td valign="top" width="130">
<p align="center"><span style="color:#800000;"><strong>Tasarea conului T (mm)</strong></span></p>
</td>
</tr>
<tr>
<td valign="top" width="68">
<p align="center"><span style="color:#800000;">T<sub>2</sub></span></p>
</td>
<td valign="top" width="130">
<p align="center"><span style="color:#800000;">30±10</span></p>
</td>
</tr>
<tr>
<td valign="top" width="68">
<p align="center"><span style="color:#800000;">T<sub>3</sub></span></p>
</td>
<td valign="top" width="130">
<p align="center"><span style="color:#800000;">70±20</span></p>
</td>
</tr>
<tr>
<td valign="top" width="68">
<p align="center"><span style="color:#800000;">T<sub>3</sub>/T<sub>4</sub></span></p>
</td>
<td valign="top" width="130">
<p align="center"><span style="color:#800000;">100±20</span></p>
</td>
</tr>
<tr>
<td valign="top" width="68">
<p align="center"><span style="color:#800000;">T<sub>4</sub></span></p>
</td>
<td valign="top" width="130">
<p align="center"><span style="color:#800000;">120±20</span></p>
</td>
</tr>
<tr>
<td valign="top" width="68">
<p align="center"><span style="color:#800000;">T<sub>4</sub>/T<sub>5</sub></span></p>
</td>
<td valign="top" width="130">
<p align="center"><span style="color:#800000;">150±30</span></p>
</td>
</tr>
<tr>
<td valign="top" width="68">
<p align="center"><span style="color:#800000;">T<sub>5</sub></span></p>
</td>
<td valign="top" width="130">
<p align="center"><span style="color:#800000;">180±30</span></p>
</td>
</tr>
</tbody>
</table>
<p><strong><br />
</strong></p>
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			<media:title type="html">legoals</media:title>
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		<title>Lucrabilitatea betonului proaspăt</title>
		<link>http://materialedeconstructie.wordpress.com/2011/06/27/lucrabilitatea-betonului/</link>
		<comments>http://materialedeconstructie.wordpress.com/2011/06/27/lucrabilitatea-betonului/#comments</comments>
		<pubDate>Mon, 27 Jun 2011 13:32:46 +0000</pubDate>
		<dc:creator>legoals</dc:creator>
				<category><![CDATA[Materie pentru beton]]></category>
		<category><![CDATA[beton]]></category>
		<category><![CDATA[beton proaspat]]></category>
		<category><![CDATA[caracteristici mecanice]]></category>
		<category><![CDATA[lucrabilitatea]]></category>
		<category><![CDATA[lucrabilitatea betonului]]></category>
		<category><![CDATA[materiale de constructii]]></category>

		<guid isPermaLink="false">http://materialedeconstructie.wordpress.com/?p=329</guid>
		<description><![CDATA[Lucrabilitatea &#8211; exprima aptitudinea betonului de a umple cofrajele sau tiparele si de a îngloba armaturile bine si uşor sub efectul unui mijloc de compactare cu o cheltuiala minima de energie si forţa de munca, precum si aptitudinea de a conserva omogenitatea amestecului in timpul transportului, manipulării si punerii sale in lucrare. Lucrabilitatea este apreciata [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=materialedeconstructie.wordpress.com&amp;blog=12129902&amp;post=329&amp;subd=materialedeconstructie&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p><span style="color:#800000;"><span style="color:#000080;"><strong>Lucrabilitatea</strong></span> &#8211; <strong>exprima aptitudinea betonului de a umple cofrajele sau tiparele si de a îngloba armaturile bine si uşor sub efectul unui mijloc de compactare cu o cheltuiala minima de energie si forţa de munca, precum si aptitudinea de a conserva omogenitatea amestecului in timpul transportului, manipulării si punerii sale in lucrare.</strong></span></p>
<p><span style="color:#800000;">Lucrabilitatea este apreciata convenţional si aproximativ prin metode de determinare a consistentei betonului proaspăt.<span id="more-329"></span></span></p>
<p><span style="color:#800000;">Lucrabilitatea influenţează direct caracteristicile mecanice ale betonului întărit, omogenitatea, comportarea la gelivitate, aderenta la armatura, etc. Lucrabilitatea depinde atât de factori interni (componenţii betonului), dar si de factori externi (dimensiunea elementelor, distante intre armaturi, frecări cu pereţii cofrajelor, tehnologii de transport si punere in lucrare, etc.). </span></p>
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			<media:title type="html">legoals</media:title>
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		<item>
		<title>Constructii de lemn</title>
		<link>http://materialedeconstructie.wordpress.com/2011/05/22/constructii-de-lemn/</link>
		<comments>http://materialedeconstructie.wordpress.com/2011/05/22/constructii-de-lemn/#comments</comments>
		<pubDate>Sun, 22 May 2011 17:52:38 +0000</pubDate>
		<dc:creator>legoals</dc:creator>
				<category><![CDATA[Carti]]></category>
		<category><![CDATA[Caracteristicile mecanice]]></category>
		<category><![CDATA[Caracteristicile tehnice]]></category>
		<category><![CDATA[Caracteristicile tehnice ale pieselor]]></category>
		<category><![CDATA[case din lemn]]></category>
		<category><![CDATA[Constructii de lemn]]></category>
		<category><![CDATA[Greutatea specifica]]></category>
		<category><![CDATA[lemn]]></category>
		<category><![CDATA[obiecte din lemn]]></category>
		<category><![CDATA[piese din lemn]]></category>
		<category><![CDATA[rezistenta la foc]]></category>
		<category><![CDATA[rezistenta la foc a lemnului]]></category>
		<category><![CDATA[utilizarea lemnului]]></category>

		<guid isPermaLink="false">http://materialedeconstructie.wordpress.com/?p=316</guid>
		<description><![CDATA[1.Caracteristicile tehnice ale pieselor de cherestea A. Caracteristicile mecanice  Comportamentul mecanic al lemnului este puternic ANIZOTROP( pentru o aceeasi solicitare, rezistenta este diferita functia de directie); in plus rezistenta mecanica este inluentata de continutul de apa al lemnului. In paginile urmatoare sunt reprezentate, cu caracter orientativ, citeva data generale privind caracteristicile mecanice ale pieselor de [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=materialedeconstructie.wordpress.com&amp;blog=12129902&amp;post=316&amp;subd=materialedeconstructie&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<h3><span style="color:#000080;">1.Caracteristicile tehnice ale pieselor de cherestea</span></h3>
<p><span style="color:#800000;">A. Caracteristicile mecanice</span><br />
<span style="color:#993300;"> Comportamentul mecanic al lemnului este puternic ANIZOTROP( pentru o aceeasi solicitare, rezistenta este diferita functia de directie); in plus rezistenta mecanica este inluentata de continutul de apa al lemnului. In paginile urmatoare sunt reprezentate, cu caracter orientativ, citeva data generale privind caracteristicile mecanice ale pieselor de cherestea.</span></p>
<p><span style="color:#800000;">B.Greutatea specifica<span id="more-316"></span></span><br />
<span style="color:#993300;">In cazul fiecarei specii in parte se pot lua in consideratie valori stabile ale greutatii specifice numai in raport cu continutul de apa. in tabelul urmator sunt prezentate citeva exemple de greutati specifice (t/m<sup>3</sup>) pentru diverse specii de lemn considerind o umiditate de 15%.</span></p>
<p><span style="color:#ff0000;">Pentru a vedea tabelul si mai multa informatie puteti descarca de aici cu doar un cick <a href="http://materialedeconstructie.wordpress.com/2011/05/22/constructii-de-lemn/constructii-de-lemn/" rel="attachment wp-att-317"><span style="color:#ff0000;">constructii de lemn</span></a></span></p>
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			<media:title type="html">legoals</media:title>
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		<title>Cimentul</title>
		<link>http://materialedeconstructie.wordpress.com/2011/04/23/cimentul/</link>
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		<pubDate>Sat, 23 Apr 2011 15:18:15 +0000</pubDate>
		<dc:creator>legoals</dc:creator>
				<category><![CDATA[Materiale pentru lucrari de tencuieli]]></category>
		<category><![CDATA[Materie pentru beton]]></category>
		<category><![CDATA[Mortare]]></category>
		<category><![CDATA[Ciment]]></category>
		<category><![CDATA[ciment portland]]></category>
		<category><![CDATA[clasificarile cimenturilor]]></category>
		<category><![CDATA[compozitia]]></category>
		<category><![CDATA[compozitia cimentului]]></category>
		<category><![CDATA[mineralogia]]></category>

		<guid isPermaLink="false">http://materialedeconstructie.wordpress.com/?p=308</guid>
		<description><![CDATA[CIMENTURI PENTRU BETOANE Cimentul este un material pulverulent, de natură bazică, hidrofil, instabil din punct de vedere chimic. Amestecat cu apa formează paste tixotrope, care fac priză şi se întăresc în timp, formând “piatra de ciment”.             Cimentulportland(silicios), reprezintă un amestec de silicaţi şi aluminaţi de calciu şi este obţinut prin măcinarea fină a clincherului [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=materialedeconstructie.wordpress.com&amp;blog=12129902&amp;post=308&amp;subd=materialedeconstructie&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p><span style="color:#000080;"><strong>CIMENTURI PENTRU BETOANE</strong></span></p>
<p><span style="color:#800000;"><strong>Cimentul este un material pulverulent, de natură bazică, hidrofil, instabil din punct de vedere chimic. Amestecat cu apa formează paste tixotrope, care fac priză şi se întăresc în timp, formând “piatra de ciment”. </strong></span></p>
<p><span style="color:#800000;">            Cimentulportland(silicios), reprezintă un amestec de silicaţi şi aluminaţi de calciu şi este obţinut prin măcinarea fină a clincherului de cimentportlandcu un adaos de 2…7 % ghips pentru reglarea timpului de priză.</span></p>
<p><span style="color:#800000;">            Clincherul de cimentportlandeste obţinut prin arderea unui amestec de materii prime în cuptoare rotative.<span id="more-308"></span></span></p>
<p><span style="color:#800000;">            Materiile prime utilizate la fabricarea clincherului de cimentportlandsunt: calcare, marne, argile, leossuri, subproduse industriale (zguri, cenuşi, şisturi), adaosuri de corecţie (silicioase, aluminoase, ferugionase etc.), gipsuri.</span></p>
<p><span style="color:#ff0000;"><strong>Petru mai multa informatia dati click aici <a href="http://materialedeconstructie.wordpress.com/2011/04/23/cimentul/cap-2-cimenturi-doc/" rel="attachment wp-att-310"><span style="color:#ff0000;">cimenturi.doc</span></a> </strong></span></p>
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		<title>Amături</title>
		<link>http://materialedeconstructie.wordpress.com/2011/03/30/amaturi/</link>
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		<pubDate>Wed, 30 Mar 2011 09:31:20 +0000</pubDate>
		<dc:creator>legoals</dc:creator>
				<category><![CDATA[Materie pentru beton]]></category>
		<category><![CDATA[armatura]]></category>
		<category><![CDATA[beton laminate]]></category>
		<category><![CDATA[beton precomprimat]]></category>
		<category><![CDATA[principalele tipuri de oteluri]]></category>
		<category><![CDATA[sirma trasa]]></category>
		<category><![CDATA[sirma trasa recoapta]]></category>
		<category><![CDATA[tipuri de oteluri]]></category>

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		<description><![CDATA[Tipuri de oţeluri Otelurile sub forma de armaturi pentru constructii din beton sunt conformate fie sub forma de bare fie sub forma de sarme, avand in comun coeficientul de dilatatie termica si modulul de elasticitate. Principalele tipuri de oteluri sunt: a). pentru beton armat -       oteluri beton laminate la cald: netede sau profilate periodic (OB [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=materialedeconstructie.wordpress.com&amp;blog=12129902&amp;post=293&amp;subd=materialedeconstructie&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<h2 style="text-align:justify;"><span style="color:#0000ff;"><strong>Tipuri de oţeluri</strong></span></h2>
<p style="text-align:justify;"><span style="color:#800000;">Otelurile sub forma de armaturi pentru constructii din beton sunt conformate fie sub forma de bare fie sub forma de sarme, avand in comun coeficientul de dilatatie termica si modulul de elasticitate.</span></p>
<p style="text-align:justify;"><span style="color:#800000;">Principalele tipuri de oteluri sunt:</span></p>
<p style="text-align:justify;"><span style="text-decoration:underline;color:#800000;">a). pentru beton armat</span></p>
<p style="text-align:justify;"><span style="color:#800000;">-       oteluri beton laminate la cald: netede sau profilate periodic (OB 00; OB 37; PC 52; PC 60 – cifrele reprezentand rezistentele la rupere in daN/mmp);</span></p>
<p style="text-align:justify;"><span style="color:#800000;">-       sarma trasa neteda pentru beton armat (STNB) si sarma trasa profilata pentru beton (STPB);</span></p>
<p style="text-align:justify;"><span style="color:#800000;">-       sarma trasa recoapta (STR – cu diametru de 1 mm pentru legarea armaturilor sau 2 mm pentru legarea cofrajelor);</span></p>
<p style="text-align:justify;"><span style="color:#800000;">-       bi-oteluri (Bi 31 … 69);</span></p>
<p style="text-align:justify;"><span style="color:#800000;">-       plase sudate uzinate (exemplu cod: 4GQ 126 – 3 = nr.ordine, G L sau N – tipul de plasa, Q sau R – forma ochiului si 126 – aria sectiunii barelor longitudinale/1 m latime)<span id="more-293"></span></span></p>
<p style="text-align:justify;"><span style="text-decoration:underline;color:#800000;"> b). pentru beton precomprimat</span></p>
<p style="text-align:justify;"><span style="color:#800000;">-       oteluri laminate la cald cu profil periodic (PC 90, PC 100);</span></p>
<p style="text-align:justify;"><span style="color:#800000;">-       sarma trefilata neteda (SBP);</span></p>
<p style="text-align:justify;"><span style="color:#800000;">-       sarma amprentata (SBPA);</span></p>
<p style="text-align:justify;"><span style="color:#800000;">-       toroane (TBP);</span></p>
<p style="text-align:justify;"><span style="color:#800000;">-       lite (LPB).</span></p>
<p style="text-align:justify;"><span style="color:#ff0000;">Pentru mai multă informaţie daţi un click aici <a rel="attachment wp-att-295" href="http://materialedeconstructie.wordpress.com/2011/03/30/amaturi/cap-10-armaturi-doc/">Armaturi.doc</a></span></p>
<p style="text-align:justify;"><span style="color:#ff0000;">NU UITAŢI SA VA DAŢI CU PĂREREA DACĂ VA PLACE ŞI LASAŢI ŞI COMENTARII CU PĂREREA D-RĂ.</span></p>
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