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background="/im/gs_t_line.jpg"> </td> </tr> </table><div class="content"> <div class="newtitle">輕質抹灰石膏墻面開裂返堿的原因分析</div> <div style="text-align: center;background-color:#F7F7F7">發布時間：2022/4/18 14:08:57 來源：<span class="infoCol">本站原創</span> 點擊：<Script Language="Javascript" Src="/item/GetHits.asp?Action=Count&GetFlag=0&m=1&ID=1551"></Script>次 <script type="text/javascript" language="javascript"> function ContentSize(size) {document.getElementById('MyContent').style.fontSize=size+'px';} </script> 字體：<a href="javascript:ContentSize(16)">大</a> <a href="javascript:ContentSize(14)">中</a> <a href="javascript:ContentSize(12)">小</a> </div> <div style="margin-top:20px;"><div id="MyContent"><p style="text-indent:28px"><span style="text-decoration:underline;"><span style="font-family: 宋體;color: rgb(0, 0, 255)"><img src="/UploadFiles/2022-04/2/2022041814115543384.jpg" width="421" height="553" style="width: 421px; height: 553px; float: left;"/></span></span><span style="text-decoration-line: underline;"><span style="font-family: 宋體;color: rgb(0, 0, 255)"><a href="http://www.desertdragoncompetition.com">輕質抹灰石膏</a></span></span><span style="font-family: 宋體; font-size: 14px;">相對于水泥砂漿，具有粘結力強、表面光滑、阻燃性好、保溫隔熱性好、施工方便、節省工期等優點。但是好的產品未必會產生好的應用，如果不注意材料把控和規范施工，石膏砂漿抹灰后就有可能會出現開裂、空鼓、起粉、返堿等問題，信陽中凱公司作為一家專業的</span><a href="http://www.desertdragoncompetition.com"><span style="font-family: 宋體;color: rgb(0, 0, 255)">?；⒅楣?/span></a><span style="font-family: 宋體; font-size: 14px;">而非抹灰石膏生產商，站在第三方角度，本著客觀真實的角度，把產生這種問題的原因分享給大家：</span></p><p style="text-indent:28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">原因一：抹灰石膏的原料采用不當，建筑石膏中過燒的無水石膏含量超標，而這部分石膏遇水不發生水化反應，不能形成粘結，導致開裂。外加劑中膠粉、</span><span style="font-family:Calibri">HPMC</span><span style="font-family:宋體">的含量配比也會影響粘結度。</span></span><a href="http://www.desertdragoncompetition.com"><span style="text-decoration:underline;"><span style="font-family: 宋體;color: rgb(0, 0, 255)"><span style="font-family:宋體">?；⒅?/span></span></span></a><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">作為其中的輕集料，其材料顆粒級配不合理也會導致開裂。</span></span></p><p style="text-indent:28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">原因二：基層處理不干凈或處理不當</span> <span style="font-family:Calibri">(</span><span style="font-family:宋體">如：基層過于干燥，松散物或粉塵未清除干凈</span><span style="font-family:Calibri">)</span><span style="font-family:宋體">，造成抹灰石膏與基層材料粘結力降低。</span></span></p><p style="text-indent:28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">原因三：施工工地強制性通風，抹灰石膏因缺水快速干固而發生塑性開裂；工地溫度過低或過高，減緩抹灰石膏凝固時長，抹灰石膏初期強度低，不能抵抗水份減少而發生的抹灰層的收縮。</span></span></p><p style="text-indent:28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">原因四：粉與水攪拌不均勻；抹灰石膏中摻入了其他材料，造成抹灰石膏強度低；濕漿料硬化后二次加水攪拌。</span></span></p><p style="text-indent:28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">原因五：混凝土墻出現鼓泡未處理；抹灰層施工厚度太厚；不同材料的基體交接處未做掛網等加強處理或加強網格布未按規定鋪貼到位。</span></span></p><p style="text-indent:28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">原因六：膩子施工時抹灰石膏含水過多（抹灰石膏施工后很快就刮膩子），膩子層與抹灰層收縮不一致，造成大面積空鼓脫落。</span></span></p><p style="text-indent:28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">原因七：用價格便宜的</span></span><a href="http://www.desertdragoncompetition.com"><span style="text-decoration:underline;"><span style="font-family: 宋體;color: rgb(0, 0, 255)"><span style="font-family:宋體">膨脹珍珠巖</span></span></span></a><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">代替?；⒅樽鳛檩p集料，因為膨脹珍珠巖吸水性高，在潮濕的環境下吸水，當環境干燥時，這些水蒸氣易將石膏晶體帶出，造成返堿現象出現。</span></span></p><p style="text-indent:28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">總之，石膏抹灰的本質是半水硫酸鈣與水生成二水硫酸鈣的化學反應過程，反應時長（初凝時間）、含水量、溫度、顆粒與水接觸度，都是反應是否充分的制約條件。只有控制好這些條件，才不會發生空鼓、開裂、起粉、返堿等質量通病。以上為中凱公司</span><span style="font-family:Calibri">1-8-6-3-8-3-8-3-1-8-8</span><span style="font-family:宋體">獨家整理而成，轉載請注明出處，有需要購買</span></span><a href="http://www.desertdragoncompetition.com"><span style="text-decoration:underline;"><span style="font-family: 宋體;color: rgb(0, 0, 255)"><span style="font-family:宋體">抹灰石膏用?；⒅?/span></span></span></a><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">，請聯系。</span></span></p><p><br/></p></div> </div> <div style="background-color:#F7F7F7;margin-top:15px;padding:10px;">上一條：<a href="/html/xwzx/jszs/1547.html" title="肥料用膨潤土的效用">肥料用膨潤土的效用</a><br /> 下一條：<a href="/html/xwzx/jszs/1552.html" title="輕質抹灰石膏的經濟配比及工程造價分析">輕質抹灰石膏的經濟配比及工程造價分析</a> <div> <div style="text-align: right;">【<a href="javascript:window.print();">打印此文</a>】【<a href="javascript:window.close();">關閉窗口</a>】</div> </div> </div> </div> </td> <td width="230" align="right" valign="top"><table width="215" border="0" cellpadding="0" cellspacing="0" class="right_k"> <tr> <td width="213" 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