ГОСТ Стандарт

ГОСТ 28575-90

Защита от коррозии в строительстве. Конструкции бетонные и железобетонные. Испытание паронипроницаемости защитных покрытий

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<title>Çàùèòà îò êîððîçèè â ñòðîèòåëüñòâå. Êîíñòðóêöèè áåòîííûå è æåëåçîáåòîííûå. Èñïûòàíèå ïàðîíèïðîíèöàåìîñòè çàùèòíûõ ïîêðûòèé</title>

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<p class=MsoNormal align=center style='margin-top:6.0pt;text-align:center'><b
style='mso-bidi-font-weight:normal'><span style='letter-spacing:2.0pt'>ÃÎÑÓÄÀÐÑÒÂÅÍÍÛÉ</span></b><span style='letter-spacing:2.0pt'> <b style='mso-bidi-font-weight:normal'>ÑÒÀÍÄÀÐÒ</b>
<b style='mso-bidi-font-weight:normal'>ÑÎÞÇÀ</b> <b style='mso-bidi-font-weight:
normal'>ÑÑÑÐ</b></span></p>

<table border=1 cellspacing=0 cellpadding=0 width="100%" style='width:100.0%;
border-collapse:collapse;border:none;
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<td width="78%" style='width:78.1%;border:solid windowtext .75pt;padding:
0cm 2.0pt 0cm 2.0pt'>
<p class=a3 style=''><b style='mso-bidi-font-weight:
normal'>Çàùèòà îò êîððîçèè â ñòðîèòåëüñòâå</b></p>
<h2>ÊÎÍÑÒÐÓÊÖÈÈ ÁÅÒÎÍÍÛÅ È <br>
ÆÅËÅÇÎÁÅÒÎÍÍÛÅ</h2>
<h2 style='margin-bottom:6.0pt'>Èñïûòàíèå ïàðîïðîíèöàåìîñòè çàùèòíûõ ïîêðûòèé</h2>
<p class=MsoNormal align=center style='margin-bottom:6.0pt;text-align:center'>Corrosion protection in
construction. <br>
Concrete and rainforced concrete constructions. <br>
Test of protection covers from steam penetration</p>
</td>
<td width="21%" style='width:21.9%;border:solid windowtext .75pt;border-left:
none;padding:0cm 2.0pt 0cm 2.0pt'>
<p class=a3 style='margin-top:24.0pt;'><b><span style='font-size:14.0pt'>ÃÎÑÒ <br>
28575-90</span></b></p>
<p class=MsoNormal align=center style='margin-top:6.0pt;text-align:center'><b
style='mso-bidi-font-weight:normal'>(CT ÑÝÂ <br>
6320-88)</b></p>
</td>
</tr>
</table>

<p class=20 align=right style='text-align:right;tab-stops:312.0pt'><b
style='mso-bidi-font-weight:normal'>Äàòà ââåäåíèÿ <u>01.01.91</u></b></p>

<p class=20>Íàñòîÿùèé ñòàíäàðò ðàñïðîñòðàíÿåòñÿ íà áåòîííûå è æåëåçîáåòîííûå
êîíñòðóêöèè è óñòàíàâëèâàåò ìåòîäû îïðåäåëåíèÿ ïàðîïðîíèöàåìîñòè ëàêîêðàñî÷íûõ,
ìàñòè÷íûõ è îêëåå÷íûõ ïîêðûòèé íà áåòîííûõ èëè æåëåçîáåòîííûõ êîíñòðóêöèÿõ ïðè
âîçäåéñòâèè âîäÿíîãî ïàðà.</p>

<h1>1. ÒÅÐÌÈÍÛ È ÎÏÐÅÄÅËÅÍÈß</h1>

<p class=20 style='margin-top:0cm'>Ïàðîïðîíèöàåìîñòü çàùèòíîãî ïîêðûòèÿ -
ñïîñîáíîñòü ïðîïóñêàòü èëè çàäåðæèâàòü âîäÿíîé ïàð â ðåçóëüòàòå ðàçíîñòè
ïàðöèàëüíîãî äàâëåíèÿ âîäÿíîãî ïàðà ïðè îäèíàêîâîì àòìîñôåðíîì äàâëåíèè íà
îáåèõ ñòîðîíàõ çàùèòíîãî ïîêðûòèÿ, õàðàêòåðèçóåìàÿ âåëè÷èíîé êîýôôèöèåíòà
ïàðîïðîíèöàåìîñòè èëè ñîïðîòèâëåíèåì ïðîíèöàåìîñòè ïðè âîçäåéñòâèè âîäÿíîãî
ïàðà.</p>

<h1><a name=ïï2>2</a>. ÑÓÕÎÉ ÌÅÒÎÄ ÎÏÐÅÄÅËÅÍÈß ÏÀÐÎÏÐÎÍÈÖÀÅÌÎÑÒÈ</h1>

<p class=20 style='margin-top:0cm'><a name=ïï21>2.1</a>. <span style='letter-spacing:2.5pt'>Ñóùíîñòü ìåòîäà</span></p>

<p class=BodyText2 style='text-align:justify'>Ìåòîä çàêëþ÷àåòñÿ â îïðåäåëåíèè
êîëè÷åñòâà âîäÿíîãî ïàðà, êîòîðîå ïðîõîäèò ÷åðåç îáðàçåö ñ çàùèòíûì ïîêðûòèåì
èëè áåç íåãî, ïóòåì èçìåðåíèÿ ìàññû âëàãîïîãëîùàþùåãî âåùåñòâà è ïîñëåäóþùåãî
âû÷èñëåíèÿ êîýôôèöèåíòà ïàðîïðîíèöàåìîñòè.  ñïîðíûõ âîïðîñàõ ïðè îïðåäåëåíèè
ïàðîïðîíèöàåìîñòè ýòîò ìåòîä èñïûòàíèÿ ÿâëÿåòñÿ àðáèòðàæíûì.</p>

<p class=MsoNormal style='text-indent:15.6pt'><a name=ïï22>2.2</a>. <span style='letter-spacing:2.5pt'>Îòáîð è ïîäãîòîâêà îáðàçöîâ.</span></p>

<p class=BodyText2 style='text-align:justify'><a name=ïï221>2.2.1</a>. Îáðàçöû
äëÿ îïðåäåëåíèÿ ïàðîïðîíèöàåìîñòè âûðåçàþòñÿ èç áåòîííûõ êóáîâ èëè öèëèíäðîâ,
ïîäãîòîâëåííûõ äëÿ èñïûòàíèÿ íà ïðî÷íîñòü áåòîíà èëè èçãîòîâëåííûõ â
ëàáîðàòîðíûõ óñëîâèÿõ. Äëÿ ñðàâíèòåëüíûõ èñïûòàíèé îáðàçöû ìîãóò áûòü âûðåçàíû
èç ñòðîèòåëüíîé êîíñòðóêöèè.</p>

<p class=MsoNormal style='text-align