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style="margin-top:15px;"> <tr> <td width="750" height="200" valign="top" class="new_k"><table width="750" border="0" cellpadding="0" cellspacing="0"> <tr> <td width="5%"><img src="/im/gs_t_l2.jpg" width="40" height="28" /></td> <td width="27%" background="/im/gs_t_line.jpg"><strong>技術(shù)知識</strong></td> <td width="65%" align="right" background="/im/gs_t_line.jpg">您當(dāng)前位置：<a href="/">中凱保溫</a> >> <a href="/html/list_1248.html">新聞中心</a> >> <a href="/html/list_1251.html">技術(shù)知識</a> >> 瀏覽文章</td> <td width="3%" align="right" background="/im/gs_t_line.jpg"> </td> </tr> </table><div id="acsjqao" class="content"> <div id="ljtjwdd" class="newtitle">輕質(zhì)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(fā)布時間：2022/4/18 14:08:57 來源：<span id="rctnakx" class="infoCol">本站原創(chuàng)</span> 點(diǎn)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 class="ideuuls" 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://homelesscrisis.com">輕質(zhì)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(jié)力強(qiáng)、表面光滑、阻燃性好、保溫隔熱性好、施工方便、節(jié)省工期等優(yōu)點(diǎn)。但是好的產(chǎn)品未必會產(chǎn)生好的應(yīng)用，如果不注意材料把控和規(guī)范施工，石膏砂漿抹灰后就有可能會出現(xiàn)開裂、空鼓、起粉、返堿等問題，信陽中凱公司作為一家專業(yè)的</span><a href="http://homelesscrisis.com"><span style="font-family: 宋體;color: rgb(0, 0, 255)">玻化微珠供應(yīng)商</span></a><span style="font-family: 宋體; font-size: 14px;">而非抹灰石膏生產(chǎn)商，站在第三方角度，本著客觀真實(shí)的角度，把產(chǎn)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(dāng)，建筑石膏中過燒的無水石膏含量超標(biāo)，而這部分石膏遇水不發(fā)生水化反應(yīng)，不能形成粘結(jié)，導(dǎo)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(jié)度。</span></span><a href="http://homelesscrisis.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(dǎo)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(dāng)</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(jié)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(qiáng)制性通風(fēng)，抹灰石膏因缺水快速干固而發(fā)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(qiáng)度低，不能抵抗水份減少而發(fā)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?dāng)嚢璨痪鶆?；抹灰石膏中摻入了其他材料，造成抹灰石膏?qiáng)度低；濕漿料硬化后二次加水?dāng)嚢琛?/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(xiàn)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(wǎng)等加強(qiáng)處理或加強(qiáng)網(wǎng)格布未按規(guī)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?zhàn)邮┕r抹灰石膏含水過多（抹灰石膏施工后很快就刮膩?zhàn)樱?，膩?zhàn)訉优c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://homelesscrisis.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?yàn)榕蛎浾渲閹r吸水性高，在潮濕的環(huán)境下吸水，當(dāng)環(huán)境干燥時，這些水蒸氣易將石膏晶體帶出，造成返堿現(xiàn)象出現(xiàn)。</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(zhì)是半水硫酸鈣與水生成二水硫酸鈣的化學(xué)反應(yīng)過程，反應(yīng)時長（初凝時間）、含水量、溫度、顆粒與水接觸度，都是反應(yīng)是否充分的制約條件。只有控制好這些條件，才不會發(fā)生空鼓、開裂、起粉、返堿等質(zhì)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 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