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轻质混凝土砌块

作者：山西嬴信科技有限公司发布日期：2022-06-17浏览次数：35

关键词：

轻质混凝土砌块

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<div id="suiji"> <section style="margin: 0px 0px 10px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 5px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; font-size: 14px; letter-spacing: 0px; line-height: 1.8;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; color: rgb(37, 56, 203);"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;">摘要：</strong></span><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;">在活性激发剂作用下，将<span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; color: rgb(254, 11, 11);">粉煤灰、脱硫石膏和水泥</span>混合，制备成一种新型的复合胶凝材料</strong>，然后在优选试验基础上确定了复合胶凝材料的基本配合比．研究了典型配合比粉煤灰－脱硫石膏－水泥净浆在复合激发剂作用下的水化过程，结果表明：粉煤灰早期火山灰活性显著提高；<strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;">脱硫石膏除自身析晶、具有一定的增强效应外，还是粉煤灰火山灰活性理想的硫酸盐激发剂．粉煤灰３ｄ即开始明显水化，脱硫石膏对粉煤灰水化活性激发效果明显．</strong></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; color: rgb(37, 56, 203);"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;">关键词：</strong></span>粉煤灰；脱硫石膏；硫酸盐激发；水化过程</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">粉煤灰用于制造水泥、混凝土填料及墙体材料等，取得了很好的技术与经济效果．然而，一般而言，粉煤灰掺量越大，水泥或混凝土的早期强度越低，这与粉煤灰的早期水化活性不足有直接关系．为此研究者们纷纷致力于研究粉煤灰水化活性的激发及其对水泥、混凝土早期强度、变形性能、抗裂性能等的影响．脱硫石膏ＣａＳＯ４含量较高，是粉煤灰火山灰活性理想的硫酸盐激发剂．脱硫石膏与粉煤灰、水泥优化复合，可产生交互水化作用，形成理想的三元胶凝材料体系．</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">在水泥中按一定比例混合双掺粉煤灰和脱硫石膏，同时辅加适量的活性激发剂，即可不经任何粉磨、烘干工序，成为一种新型的复合胶凝材料．本文在试验基础上确定了砂浆和混凝土中各胶凝组分的配合比，研究了粉煤灰－脱硫石膏－水泥净浆的水化过程．</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;">１原材料</strong></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">粉煤灰：平顶山姚孟电厂湿排粉煤灰（简写为ＷＦＡ），其比表面积为３３５ｍ２／ｋｇ，需水量比１）为９８％，烧失量为２．３１％，含水量为３４．１％；低品质粉煤灰（简写为ＬＦＡ），其比表面积为２９０ｍ２／ｋｇ，需水量比为１０３％，烧失量为３．０４％．粉煤灰化学组成见表１．</p></section></section><p><br/></p><section style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; white-space: normal; background-color: rgb(255, 255, 255); text-align: center; overflow-wrap: break-word !important;"><br/></section><section style="margin: 0px 0px 10px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 5px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; font-size: 14px; letter-spacing: 0px; line-height: 1.8;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">脱硫石膏（以下简称为ＦＧＤ）：平顶山姚孟电厂劣质石膏，其外观呈灰黄色粉状，主要成分为ＣａＳＯ４·２Ｈ２Ｏ，附着水量９．８９％，化学组成见表２．</p></section></section><section style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; white-space: normal; background-color: rgb(255, 255, 255); text-align: center; overflow-wrap: break-word !important;"><br/></section><section style="margin: 0px 0px 10px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 5px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; font-size: 14px; letter-spacing: 0px; line-height: 1.8;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">水泥：湖南牛力水泥厂４２．５普通硅酸盐水泥，其化学组成见表３．该水泥３ｄ和２８ｄ实测抗折强度分别为６．０ＭＰａ和９．１ＭＰａ，实测抗压强度分别为２３．７ＭＰａ和５２．７ＭＰａ．</p></section></section><section style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; white-space: normal; background-color: rgb(255, 255, 255); text-align: center; overflow-wrap: break-word !important;"><br/></section><section style="margin: 0px 0px 10px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 5px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; font-size: 14px; letter-spacing: 0px; line-height: 1.8;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">活性激发剂：ＣＡ，以市售硫酸盐、氯盐以及碱类材料按比例复配而成；生石灰（ＣａＯ），市售．减水剂：萘系高效减水剂，市售．</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">砂：ＩＳＯ标准砂．</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;">２胶凝组分基本配合比</strong></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">２．１砂浆</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">为降低水泥用量，砂浆中胶凝组分以粉煤灰和脱硫石膏为主，其中粉煤灰采用技术品质达不到ＧＢ／Ｔ１５９６—２００５《用于水泥与混凝土中的粉煤灰》所规定的Ⅰ，Ⅱ级粉煤灰标准的低品质粉煤灰（ＬＦＡ）．胶砂试件中胶凝组分掺量见表４．</p></section></section><section style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; white-space: normal; background-color: rgb(255, 255, 255); text-align: center; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; vertical-align: middle; display: inline-block; line-height: 0;"><img class="" src="https://mmbiz.qpic.cn/mmbiz_png/jyuTe1Qj6ZiarBEnibSkCskViaZZfibfGfUVGry4hWaiadWicPibV5OHP6ywLu1B97niaaYj6cl03zjWwia4FMy4q60icj8A/640?wx_fmt=png&tp=webp&wxfrom=5&wx_lazy=1&wx_co=1" alt="图片" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; height: auto !important; vertical-align: middle; width: 677px !important; visibility: visible !important;"/></section></section><section style="margin: 0px 0px 10px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 5px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; font-size: 14px; letter-spacing: 0px; line-height: 1.8;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">图１为灰膏比（ｍ（ＬＦＡ）︰ｍ（ＦＧＤ））对胶砂试件强度的影响．</p></section></section><section style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; white-space: normal; background-color: rgb(255, 255, 255); text-align: center; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; vertical-align: middle; display: inline-block; line-height: 0;"><img class="" src="https://mmbiz.qpic.cn/mmbiz_png/jyuTe1Qj6ZiarBEnibSkCskViaZZfibfGfUVHKZZoyp9iceicyzk6jYEx2T3xaXmq3I6gMH1xNbVvDG9qW9M9tQxLyIw/640?wx_fmt=png&tp=webp&wxfrom=5&wx_lazy=1&wx_co=1" alt="图片" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; height: auto !important; vertical-align: middle; width: 461px !important; visibility: visible !important;"/></section></section><section style="margin: 0px 0px 10px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 5px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; font-size: 14px; letter-spacing: 0px; line-height: 1.8;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">由图１可见：<span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; color: rgb(132, 30, 30);"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;">当ｍ（ＬＦＡ）︰ｍ（ＦＧＤ）<span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; letter-spacing: 0px;">由１︰１上升至３︰２时</span></strong></span><span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; letter-spacing: 0px;">，胶砂试件抗折和抗压强度均随之上升；此后，随着灰膏比进一步上升，胶砂试件抗折和抗压强度则不断减小，即胶砂试件在ｍｍ（Ｌ（ＦＦＡＧ）Ｄ︰　）为　３　︰２　时出现强度峰值．上述表明，当水泥用量为１５．０％时，灰膏比佳比例为３︰２．保持ｍ（ＬＦＡ）︰ｍ（ＦＧＤ）为３︰２不变，测试水泥掺量对胶砂试件强度的影响，结果见图２．</span></p></section></section><section style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; white-space: normal; background-color: rgb(255, 255, 255); text-align: center; overflow-wrap: break-word !important;"><br/></section><section style="margin: 0px 0px 10px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 5px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; font-size: 14px; letter-spacing: 0px; line-height: 1.8;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; letter-spacing: 0px;">由图２可知：</span><span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; letter-spacing: 0px;">（１）当水泥掺量从１０％增加到２０％时，胶砂试件抗折和抗压强度均随之提高．（２）相比未掺水泥胶砂试件，掺水泥胶砂试件７ｄ抗折强度增加１～４倍，２８ｄ抗折强度增加１～７倍．（３）相比未掺水泥胶砂试件，当水泥掺量为１０％时，胶砂试件７ｄ抗压强度增加４～５倍，２８ｄ抗压强度增加２～３倍；当水泥掺量为１５％时，胶砂试件７ｄ抗压强度增加５倍以上，２８ｄ抗压强度增加５～６倍；当水泥掺量为２０％时，胶砂试件７ｄ抗压强度增至１８倍左右，２８ｄ抗压强度则增加６倍以上．</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">上述结果表明，<span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; color: rgb(132, 30, 30);"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;">水泥掺量是决定胶砂试件强度的关键因素</strong></span>．基于砂浆强度要求和大限度降低材料成本、提高利废率考虑，笔者确定砂浆中胶凝组分的基本配合比为：ｍ（ＬＦＡ）︰ｍ（ＦＧＤ）＝３︰２，水泥掺量１５％．<span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; color: rgb(254, 11, 11);"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;">若采用品质相对较好的粉煤灰，水泥掺量可适当减少</strong></span>．</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">在大掺量粉煤灰－脱硫石膏体系中掺入适量活性激发剂，将有利于激发粉煤灰水化活性，同时降低水泥掺量、节约成本．</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">活性激发剂对胶砂试件强度的影响见图３．</p></section></section><section style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; white-space: normal; background-color: rgb(255, 255, 255); text-align: center; overflow-wrap: break-word !important;"><br/></section><section style="margin: 0px 0px 10px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 5px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; font-size: 14px; letter-spacing: 0px; line-height: 1.8;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">由图３可知，外掺１．５％ＣＡ后，胶砂试件强度显著提高，其中３，７，２８，６０ｄ抗折强度分别增加３１．３％，２１．４％，９．０％和１１．４％，抗压强度相应提高７８．１％，５８．９％，１７．４％和６．７％．同时外掺１．５％ＣＡ和５．０％ＣａＯ，胶砂试件强度（尤其是早期强度）将进一步提高．<span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; color: rgb(254, 11, 11);"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;">这是因为掺加活性激发剂ＣａＯ后</strong></span>，灰膏体系液相介质中ＯＨ－浓度增加，从而促进粉煤灰中Ｓｉ—Ｏ键断裂，并尽早参与水化反应的缘故．然而ＣａＯ掺量过多，将极易出现泛霜现象．根据文献的试验结果，ＣａＯ掺量以５．０％为宜．</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">２．２混凝土</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">粉煤灰采用品质相对较好、未烘干的湿排粉煤灰（ＷＦＡ）．控制水固比，将湿排粉煤灰、脱硫石膏、水泥以及活性激发剂按比例混合均匀，再加入砂石、高效减水剂，制备Ｃ２５～Ｃ５０混凝土．胶砂试件配合比与抗压强度见表５．</p></section></section><section style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; white-space: normal; background-color: rgb(255, 255, 255); text-align: center; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; vertical-align: middle; display: inline-block; line-height: 0;"><img class="" src="https://mmbiz.qpic.cn/mmbiz_png/jyuTe1Qj6ZiarBEnibSkCskViaZZfibfGfUVj33dfqNdOEk0WLhOZZYuEe22F17MkFaTHpGR9XzBkiaxnVE78GEFVUA/640?wx_fmt=png&tp=webp&wxfrom=5&wx_lazy=1&wx_co=1" alt="图片" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; height: auto !important; vertical-align: middle; width: 677px !important; visibility: visible !important;"/></section></section><section style="margin: 0px 0px 10px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.2176px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 5px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; font-size: 14px; letter-spacing: 0px; line-height: 1.8;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">由表５可见，相对纯水泥胶砂试件，掺ＷＦＡ＋ＦＧＤ胶砂试件早期抗压强度均呈现出不同程度的降低，这归因于早期水化体系中水泥用量的减少．随着龄期的发展，胶砂试件抗压强度逐渐增加，有的甚至超过纯水泥胶砂试件．当灰膏比（ｍ（ＷＦＡ）︰ｍ（ＦＧＤ））为２︰１，且ＷＦＡ＋ＦＧＤ等量取代水泥３０％时，胶砂试件早期强度下降相对较少，２８，６０ｄ抗压强度达到５２．３，６０．１ＭＰａ，超过纯水泥胶砂试件．基于中等强度混凝土力学性能要求和提高利废率考虑，混凝土适宜配合比为：ＷＦＡ＋ＦＧＤ等量取代水泥３０％，ｍ（ＷＦＡ）︰ｍ（ＦＧＤ）为２︰１，水胶比０．３６，且外掺ＣａＯ　５．０％和ＣＡ　１．５％．值得强调的是，ＷＦＡ＋ＦＧＤ在水胶比条件下早期活性，粉煤灰－脱硫石膏－水泥三元胶凝材料体系强度发展更理想，可适当放宽ＷＦＡ＋ＦＧＤ的掺量至４０％左右．</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;">3结论</strong></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">（１）采用过去难以利用的低品质粉煤灰和脱硫石膏制备建筑砂浆，配合比为：<span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; color: rgb(254, 11, 11);"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;">ｍ（ＬＦＡ）︰ｍ（ＦＧＤ）＝３︰２，ＬＦＡ＋ＦＧＤ总掺量８５％，水泥掺量１５％</strong></span>；采用湿排粉煤灰和脱硫石膏制备Ｃ２５～Ｃ５０混凝土，配合比为：ＷＦＡ＋ＦＧＤ等量取代水泥３０％，ｍ（ＷＦＡ）︰ｍ（ＦＧＤ）＝２︰１，水胶比０．３６，且外掺ＣａＯ５．０％和ＣＡ１．５％．</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; overflow-wrap: break-word !important;">（２）粉煤灰－脱硫石膏－水泥净浆在复合激发剂作用下，粉煤灰早期火山灰活性显著提高；脱硫石膏除自身析晶、具有一定的增强效应外，还是粉煤灰火山灰活性理想的硫酸盐激发剂．粉煤灰３ｄ即开始明显水化，脱硫石膏对粉煤灰水化活性激发效果明显．</p></section></section><p><br/></p><p><br/></p> 轻质混凝土砌块自保温砌块轻质混凝土砌块自保温砌块自保温砌块轻质混凝土砌块轻质混凝土砌块自保温砌块轻质混凝土砌块轻质混凝土砌块 </div> <link href="/template/duli/comm/css/qq3.css" rel="stylesheet" type="text/css" /> <div class="float-right-box show on"> <div class="top-list"> <ul> <li><a class="f-cb"><span class="fl stt">4000355681</span><span class="ico ico7"></span></a></li> <li><a class="f-cb"><span class="fl stt">18636589096</span><span class="ico ico7"></span></a></li> <li><a class="f-cb shouji" href="javascript:;" target="_blank"><span class="fl stt">手机站二维码</span><span class="ico ico10"></span> <div class="sidebox" style="display: none; 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