CN101531491B - 防火抗裂高强潜热砂浆 - Google Patents
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Abstract
一种建筑节能防火抗裂高强潜热砂浆，砂浆强度高，防火防水防裂与耐久性能好，具有隔热和蓄热双重热工性能，既可作外保温又可作内保温节能材料，不需做抗裂抗冲击加强层，保温砂浆层上能直接粘贴饰面砖或刷涂料，冷桥部位的处理尤为方便。减少了施工工序、降低了操作难度、提高了施工速度、降低了劳动强度，在方便施工、缩短工期、降低工程综合造价、推动节能技术进步等方面都体现了明显的优势。智能化调控温度，降低建筑物室内温度波动，提高了室内环境的舒适度，降低了电能消耗。配方材料中不含胶粉等易燃易老化的有机材料，提高了砂浆防火和耐久性能，与建筑同寿命。
Description
所属技术领域
本发明涉及一种建筑节能防火抗裂高强潜热砂浆。本发明尤其是涉及一种用膨胀性玻璃质瓷粒配制的潜热节能砂浆。
背景技术
建筑节能是我国的一项基本国策。应用保温砂浆技术来提高建筑物外围护结构热阻是建筑节能的一项重要技术措施。目前公知的保温砂浆一般为再生聚苯颗粒，改性膨胀珍珠岩，硅藻土，闭孔珍珠岩，玻化微珠，中空微珠等轻质颗粒，掺入胶粉、水泥等胶凝材料配制而成。这类保温砂浆只有单项热阻性，热容小，抵抗温度波动能力小，热工性能较差。由于聚苯颗粒与水泥相容性较差，变形较大且防火性能和施工可操作性较差，易造成开裂渗水问题。玻化微珠等颗粒强度较低，吸水量较大，施工搅拌时表面封闭层易破损且颗粒本身易破碎，热工性能较差，施工后墙面易开裂渗水。同时由于各类保温砂浆抗压强度较低，一般在1MPa左右，线性收缩率较大，在0.2％以上，在实际应用时需要做加强层，加强层中需用玻璃纤维网格布，玻璃纤维又会因与水泥产生碱化学反应而逐近腐蚀；贴陶瓷面砖时，加强层内还需作双层钢丝网并加钉锚固钉，且部分品种保温砂浆只能用作外墙内保温，现行公知的保温砂浆技术体系施工工序多，操作复杂，劳动强度大，工期长，各组成材料相容性差，质量难以控制。耐久性差，使用年限短，因而国家规定的使用年限为25年。一般建筑物的寿命都五十年乃至一百年以上，此类保温材料在这么短的时间后维护、更换产生的废弃物又会造成环境污染，再生产又需要消耗能源，还有更新保温材料所需资金的问题也会给国家和地方政府带来麻烦。可参见JGJ144-2004标准和有关省市颁布的《水泥基复合保温砂浆应用技术规程》。
发明内容
为了克服现行保温砂浆性能及其技术体系的不足，本发明提供了一种防火抗裂高强潜热砂浆(以下简称砂浆)，该砂浆不但具有收缩性小，线性收缩率小于0.10；强度高，抗压强度大于3MPa；潜热高，可智能化调控温度，具有隔热和储能双重热工性能。而且施工工序少，该砂浆在粉刷后不需要另做加强层，可直接在其表面上粘贴饰面砖或刷涂料，如同粉普通水泥砂浆一样简单方便。
本发明解决其技术问题所采用的技术方案是：采用一种膨胀性玻璃质瓷粒作绝热轻质颗粒、以普通水泥作胶凝材料，用Y型PP纤维、高弹模PVA纤维、木质素纤维复合作抵抗塑性裂纹的抗裂材料，添加石墨蓄热微粉增强砂浆的蓄热储能性能，并以隔热镇水粉加强防渗性能。
影响保温砂浆性能的主要因素在于绝热轻质颗粒的性能，本发明采用的膨胀性玻璃质瓷粒的技术特征为，外观为不规则圆球状晶粒，晶粒内部具有蚂蜂窝状微观结构，晶粒有微膨胀性弹性趋向，搅拌和粉刷时多余的水份有部分将被储存在晶粒内部蚂蜂窝的小泡穴中，在后期水泥石硬化及强度发展过程中的一二年时期内不断释放出水份进行结构内在自身养护，晶粒还会与水泥水化产生的活性氢氧化钙作用生成一定量的硅酸钙水化胶，增强结构力，阻止水份渗透，蚂蜂窝状结构又使晶粒具有柔性，吸收应力稳定体积，降低收缩度，防止龟裂和冻胀损害。
混凝土配合比设计技术告诉我们，原材料不变，砂、石骨料的级配良好能提高水泥石的强度和抗渗等性能。根据这一原理，本发明拚弃不考虑保温颗粒级配的常规掺用方式，先将不同规格的瓷粒按预定方案进行连续级配或区间级配混合，形成良好级配，这样在砂浆结构内部就会由不同粒径的瓷粒均匀充满空隙，减少了孔隙率，提高了砂浆强度和防水能力。
利用膨胀性玻璃质瓷粒内部具有蚂蜂窝状微观结构特性，添加石墨蓄热微粉，在砂浆结构中，由于石墨蓄热微粉的复合物晶粒尺寸较小，从纳米到微米级，微粉除填充在砂浆结构孔隙中外，微粉的溢出物还可通过微孔的毛细作用力将钻入瓷粒内部蚂蜂窝的小泡穴中，既可增加瓷粒抵抗外力的能力，提高了瓷粒阻热和蓄热能力，还增强了砂浆的防水能力。同时，由于砂浆结构内均匀分布了石墨蓄热微粉，当墙体表面环境温度达到微粉熔化温度时，微粉液化，砂浆吸收并储存大量的潜热；当墙体表面环境温度下降到一定程度后，微粉固化，砂浆储存的热量又散发到环境中去，延长了室内恒温时间。使砂浆不但保持了原有的阻热功能，还具有了智能化调控温度功能，大幅度提高了砂浆的热工性能。这样可有效降低建筑物室内温度波动，提供健康舒适的室内环境，减少空气调节设备启动次数和运行时间，降低能源支出，又可以利用低峰电力、削峰填谷、降低电能消耗。
砂浆配方表(质量比)：
普通水泥30～60％、膨胀性玻璃质瓷粒40～65％、隔热镇水粉0.1～5％、石墨蓄热微粉5～20％、Y型PP纤维0.2～0.4％、高弹模PVA纤维0.1～0.3％、木质素纤维0.1～0.5％。
配方组份材料来源：
普通水泥-东台市水泥厂；
膨胀性玻璃质瓷粒-盐城东方新格节能科技有限公司；
隔热镇水粉-盐城东方新格节能科技有限公司；
石墨蓄热微粉-无锡轻工大学建筑设计研究院节能技术研究所；
Y型PP纤维-进口；
高弹模PVA纤维-安徽皖维集团；
木质素纤维-进口；
本发明的有益效果是，砂浆强度高，线性收缩小，防火防水防裂与耐久性能好，具有阻热和蓄热双重热工性能，既可作外保温又可作内保温节能材料，不需做抗裂抗冲击加强层，保温砂浆层上能直接粘贴饰面砖或刷涂料，更方便了对窗台、阳台、空调搁板等冷桥部件的处理。减少了施工工序、降低了操作难度、提高了施工速度、降低了劳动强度，在方便施工、缩短工期、降低工程综合造价、推动节能技术进步等方面都体现了明显的优势。智能化调控温度，降低建筑物室内温度波动，提高了室内环境的舒适度，降低了电能消耗。配方材料中不含胶粉等易燃易老化的有机材料，提高了砂浆防火和耐久性能，能与建筑同寿命，减少了现行保温材料维护更新对环境的污染和再生产的耗能。
具体实施方式
1.先根据膨胀性玻璃质瓷粒的不同粒径的大、中、小规格品，分别按60％、30％、10％的比例按需称量放入搅拌机中，再按比例加入隔热镇水粉和石墨蓄热微粉，搅拌3～5分钟，制得级配轻骨料；
2.将级配轻骨料倒入混合机料斗中，再依次按比例加入Y型PP纤维、高弹模PVA纤维、木质素纤维、普通水泥，进入混合机中搅拌5～8分钟，经自动包装机进行计量包装。
Claims (1)
1.一种防火抗裂高强潜热砂浆的制造方法，其是将普通水泥30～60％、膨胀性玻璃质瓷粒40～65％、隔热镇水粉0.1～5％、石墨蓄热微粉5～20％、Y型PP纤维0.2～0.4％、高弹模PVA纤维0.1～0.3％、木质素纤维0.1～0.5％配制而成，其中膨胀性玻璃质瓷粒是经级配的轻骨料，该方法包括以下步骤：
1）先根据膨胀性玻璃质瓷粒的不同粒径的大、中、小规格品，分别按60％、30％、10％的比例按需称量放入搅拌机中，再按比例加入隔热镇水粉和石墨蓄热微粉，搅拌3～5分钟，制得级配轻骨料；
2）将级配轻骨料倒入混合机料斗中，再依次按比例加入Y型PP纤维、高弹模PVA纤维、木质素纤维、普通水泥，进入混合机中搅拌5～8分钟，经自动包装机进行计量包装，
其特征在于，制得的防火抗裂高强潜热砂浆中石墨蓄热微粉的溢出物可渗入膨胀性玻璃质瓷粒微孔内部。
2. 一种由权利要求1的制造方法制造的防火抗裂高强潜热砂浆，其特征在于石墨蓄热微粉的溢出物可渗入膨胀性玻璃质瓷粒微孔内部。
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|---|---|---|---|---|
| CN102213065B (zh) * | 2011-04-14 | 2013-02-27 | 哈尔滨工业大学建筑设计研究院 | 严寒地区外墙及门窗口防火及保温构造 |
| CN102976683A (zh) * | 2012-12-10 | 2013-03-20 | 常熟建工建设集团有限公司苏州分公司 | 水泥基材吸波建筑材料 |
| CN103539399B (zh) * | 2012-12-24 | 2015-11-25 | 张伟哲 | 墙体保温防火涂料及其施工方法 |
| CN103435310A (zh) * | 2013-08-20 | 2013-12-11 | 南通汇能环保建材有限公司 | 一种耐碱耐磨防锈板材浆砂 |
| CN103435314A (zh) * | 2013-08-20 | 2013-12-11 | 南通汇能环保建材有限公司 | 一种板材粘结防潮成岩浆砂 |
| CN105541349A (zh) * | 2015-12-18 | 2016-05-04 | 山东耀华特耐科技有限公司 | 循环流化床锅炉用轻质隔热喷涂料及其制作和施工工艺 |
| CN108793887B (zh) * | 2018-07-26 | 2020-12-22 | 上海石化安东混凝土有限公司 | 一种大体积混凝土及其制备方法 |
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