CN108178638A - 一种复合保温砌块墙体材料及其制备方法 - Google Patents
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Abstract
本发明涉及一种复合保温砌块墙体材料及其制备方法,属于建筑材料技术领域。本发明利用厌氧消化污泥中含有丰富的有机质在高温焙烧情况下氧化燃烧,产生大量微孔,使胚体孔隙率提高,通过提高其孔洞率来提升保温性能,可显著提高胚体热工性能,同时采用的高岭土尾矿中主要矿物成分有石英、高岭土、黄铁矿和明矾石,这些成分在烧结过程中能够与污泥相互反应形成新的矿物,或是形成固熔体、共溶体、混晶,有效包裹泡沫玻璃边角料形成耐火性能良好的保温砌块,既合理处置了污泥,又提升了砌块的热工性能,优化资源配置,具有广阔的应用前景。
Description
技术领域
本发明涉及一种复合保温砌块墙体材料及其制备方法,属于建筑材料技术领域。
背景技术
作为建筑维护结构的主体,墙体的保温性能对建筑节能有着重要的影响。1866年,美国哈契逊获得首个空心砌块专利,自此,混凝土空心砌块得到全球的广泛应用。西方国家目前在混凝土空心砌块的保温性能方面取得了显著的研究进展,如美国、加拿大、波兰、芬兰相继研制并推出TB式、IMSI式、U型咬合式、三明治式复合保温砌块等。经济的迅猛发展与人民生活水平的不断攀升日益增加了人们的空调采暖要求,建筑能耗亦由此持续上升。为了缓解能源压力,推动经济与环境实现可持续发展,真正以对节能设计标准的严格实施为前提适应建筑节能的重要要求,部分企业陆续从国外引进先进经验,进行复合保温砌块生产线与复合保温砌块块型的积极研发,所生产的产品已在框架结构、多层混凝土小型空心砌块、配筋小型空心砌块等建筑类市场得到较多的应用。复合保温即将保温层夹于墙体中间,通常,砌于保温材料两侧的混凝土砌块或砖砌块共同构成主墙体部分,岩棉板、聚苯板、玻璃面板或袋装膨胀珍珠岩等为保温材料。
建筑能耗的逐年大幅度上升,使建筑节能已成为建筑行业发展的一个重要领域。目前,建筑能耗中最主要的是采暖和空调耗能,建筑围护结构的耗热量约占建筑采暖空调能耗的1/3以上,其中墙体所占比重最大,约占通过围护结构的传热耗热量的75%~80%。目前,建筑墙体很多是由复合保温砌块砌筑而成。而复合保温砌块由2部分组成,一是主要起着骨架支撑作用的复合保温砌块主体材料,二是主要起着填充、保温隔热的复合保温砌块填充材料。市场上,复合保温砌块主体材料主要由烧结砌块和非烧结砌块组成,而复合保温砌块填充材料主要由保温绝热材料组成。随着建筑节能研究与墙材革新的日益深入和现代建筑技术的发展,其中保温隔热、利废环保的复合保温砌块,作为一种新的建筑墙体材料越来越显示出旺盛的生命力和光辉灿烂的前景。
但是,现有复合保温砌块大多存在的保温隔热性能、耐火性能与耐候性能较差、使用寿命较短等问题,因此,对现有复合保温砌块墙体材料的改进与再制备,提高其保温隔热、耐火、耐候等多种性能显得尤为重要。
发明内容
本发明所要解决的技术问题:针对现有复合保温砌块大多存在的保温隔热性能、耐火性能较差的问题,提供了一种复合保温砌块墙体材料及其制备方法。
为解决上述技术问题,本发明采用的技术方案是:
一种复合保温砌块墙体材料,其特征在于,包括按重量份计的下述组分:
100~150份泡沫玻璃边角料,50~100份膨胀珍珠岩,150~200份预处理厌氧消化污泥,200~400份粉煤灰,150~300份高岭土尾矿,30~50份硅灰,50~80份石灰,150~250份普通硅酸盐水泥,15~20份胶粉,3~5份羟丙基甲基纤维素醚。
所述泡沫玻璃边角料表观密度为160~180kg/m3,颗粒粒径为5~30mm。
所述预处理厌氧消化污泥为脱水至含水率为40~50%的厌氧消化污泥干燥研磨至过100目筛。
所述高岭土尾矿为高岭土原矿选矿后经筛分、摇床水洗、去除黄铁矿等工艺后得到的高岭土尾矿。
所述的一种复合保温砌块墙体材料,其特征在于,还包括按重量份计的减水剂5~10份。
所述的一种复合保温砌块墙体材料的制备方法,其特征在于,具体步骤为:
(1)取厌氧消化污泥装入压滤机中脱水,再干燥研磨粉碎,过100目筛,得预处理厌氧消化污泥;
(2)取粉煤灰、高岭土尾矿,装入球磨机中球磨1~2h,再加入硅灰、石灰,继续球磨20~30min,得复合粉料;
(3)取泡沫玻璃边角料、膨胀珍珠岩、预处理厌氧消化污泥、去离子水,加入混料机中搅拌3~5min,再加入复合粉料,混合均匀后加入普通硅酸盐水泥、胶粉、羟丙基甲基纤维素醚、减水剂,以1200~1500r/min搅拌5~6min,得混合料;
(4)向混合料中加入去离子水,搅拌至呈良好流动性的浆状物后注入模具中,捣实成型,室温静置22~24h后拆模,干燥得保温砌块胚体;
(5)将保温砌块胚体置于温度梯度炉中,以2℃/min升温至400~600℃,保温反应1~2h,再以5℃/min升温至900~950℃,保温烧结2~3h,冷却至室温后,得复合保温砌块墙体材料。
本发明与其他方法相比,有益技术效果是:
(1)本发明利用厌氧消化污泥中含有丰富的有机质,具有较高的热值,造孔性能好的特点,在污泥烧结过程中,使污泥中的有机物完全得到氧化,同时可有效地固化污泥中的无机组分和有毒重金属,以免重金属造成严重污染,对环境起到一定的保护作用,而且,污泥中的有机组分在高温焙烧情况下氧化燃烧,产生大量微孔,使胚体孔隙率提高,通过提高其孔洞率来提升保温性能,可显著提高胚体热工性能,有利于建筑节能;
(2)本发明采用的高岭土尾矿中主要矿物成分有石英、高岭土、黄铁矿和明矾石,这些成分在烧结过程中能够与污泥相互反应形成新的矿物,或是形成固熔体、共溶体、混晶,有效包裹泡沫玻璃边角料形成耐火性能良好的保温砌块,既合理处置了污泥,又提升了砌块的热工性能,优化资源配置,具有广阔的应用前景。
具体实施方式
取厌氧消化污泥装入压滤机中,脱水至含水率为40~50%,再置于干燥箱中,在105~110℃下干燥至恒重,并转入研磨机中研磨粉碎,过100目筛,得预处理厌氧消化污泥,取200~400g粉煤灰,150~300g高岭土尾矿,装入球磨机中以150~200r/min球磨1~2h,再加入30~50g硅灰,50~80g石灰,继续球磨20~30min,得复合粉料,取100~150g泡沫玻璃边角料,50~100g膨胀珍珠岩,150~200g预处理厌氧消化污泥,30~50g去离子水,加入混料机中搅拌3~5min,再加入复合粉料,混合均匀后加入150~250g普通硅酸盐水泥,15~20g胶粉,3~5g羟丙基甲基纤维素醚,5~10g减水剂,以1200~1500r/min搅拌5~6min,得混合料,向混合料中加入100~150g去离子水,以60~100r/min搅拌至呈良好流动性的浆状物后注入模具中,捣实成型,室温静置22~24h后拆模,再置于干燥箱中,在105~110℃下干燥至恒重,得保温砌块胚体,将保温砌块胚体置于温度梯度炉中,以2℃/min升温至400~600℃,保温反应1~2h,再以5℃/min升温至900~950℃,保温烧结2~3h,冷却至室温后,得复合保温砌块墙体材料。
实例1
取厌氧消化污泥装入压滤机中,脱水至含水率为40%,再置于干燥箱中,在105℃下干燥至恒重,并转入研磨机中研磨粉碎,过100目筛,得预处理厌氧消化污泥,取200g粉煤灰,150g高岭土尾矿,装入球磨机中以150r/min球磨1h,再加入30g硅灰,50g石灰,继续球磨20min,得复合粉料,取100g泡沫玻璃边角料,50g膨胀珍珠岩,150g预处理厌氧消化污泥,30g去离子水,加入混料机中搅拌3min,再加入复合粉料,混合均匀后加入150g普通硅酸盐水泥,15g胶粉,3g羟丙基甲基纤维素醚,5g减水剂,以1200r/min搅拌5min,得混合料,向混合料中加入100g去离子水,以60r/min搅拌至呈良好流动性的浆状物后注入模具中,捣实成型,室温静置22h后拆模,再置于干燥箱中,在105℃下干燥至恒重,得保温砌块胚体,将保温砌块胚体置于温度梯度炉中,以2℃/min升温至400℃,保温反应1h,再以5℃/min升温至900℃,保温烧结2h,冷却至室温后,得复合保温砌块墙体材料。
实例2
取厌氧消化污泥装入压滤机中,脱水至含水率为45%,再置于干燥箱中,在107℃下干燥至恒重,并转入研磨机中研磨粉碎,过100目筛,得预处理厌氧消化污泥,取300g粉煤灰,220g高岭土尾矿,装入球磨机中以170r/min球磨1h,再加入40g硅灰,65g石灰,继续球磨25min,得复合粉料,取125g泡沫玻璃边角料,75g膨胀珍珠岩,175g预处理厌氧消化污泥,40g去离子水,加入混料机中搅拌4min,再加入复合粉料,混合均匀后加入200g普通硅酸盐水泥,17g胶粉,4g羟丙基甲基纤维素醚,7g减水剂,以1350r/min搅拌5min,得混合料,向混合料中加入125g去离子水,以80r/min搅拌至呈良好流动性的浆状物后注入模具中,捣实成型,室温静置23h后拆模,再置于干燥箱中,在107℃下干燥至恒重,得保温砌块胚体,将保温砌块胚体置于温度梯度炉中,以2℃/min升温至500℃,保温反应1h,再以5℃/min升温至925℃,保温烧结2h,冷却至室温后,得复合保温砌块墙体材料。
实例3
取厌氧消化污泥装入压滤机中,脱水至含水率为50%,再置于干燥箱中,在110℃下干燥至恒重,并转入研磨机中研磨粉碎,过100目筛,得预处理厌氧消化污泥,取400g粉煤灰,300g高岭土尾矿,装入球磨机中以200r/min球磨2h,再加入50g硅灰,80g石灰,继续球磨30min,得复合粉料,取150g泡沫玻璃边角料, 100g膨胀珍珠岩,200g预处理厌氧消化污泥,50g去离子水,加入混料机中搅拌5min,再加入复合粉料,混合均匀后加入250g普通硅酸盐水泥,20g胶粉,5g羟丙基甲基纤维素醚,10g减水剂,以1500r/min搅拌6min,得混合料,向混合料中加入150g去离子水,以100r/min搅拌至呈良好流动性的浆状物后注入模具中,捣实成型,室温静置24h后拆模,再置于干燥箱中,在110℃下干燥至恒重,得保温砌块胚体,将保温砌块胚体置于温度梯度炉中,以2℃/min升温至600℃,保温反应2h,再以5℃/min升温至950℃,保温烧结3h,冷却至室温后,得复合保温砌块墙体材料。
将制备得的一种复合保温砌块墙体材料及吉林某公司生产的保温墙体材料进行检测,具体检测结果如下表表1:
表1复合保温砌块墙体材料性能表征
由表1可知,本发明制得的一种复合保温砌块墙体材料,传热系数显著提升,
抗压能力强,具有广阔的应用前景。
Claims (6)
1.一种复合保温砌块墙体材料,其特征在于,包括按重量份计的下述组分:
100~150份泡沫玻璃边角料,50~100份膨胀珍珠岩,150~200份预处理厌氧消化污泥,200~400份粉煤灰,150~300份高岭土尾矿,30~50份硅灰,50~80份石灰,150~250份普通硅酸盐水泥,15~20份胶粉,3~5份羟丙基甲基纤维素醚。
2.如权利要求1所述的一种复合保温砌块墙体材料,其特征在于,所述泡沫玻璃边角料表观密度为160~180kg/m3,颗粒粒径为5~30mm。
3.如权利要求1所述的一种复合保温砌块墙体材料,其特征在于,所述预处理厌氧消化污泥为脱水至含水率为40~50%的厌氧消化污泥干燥研磨至过100目筛。
4.如权利要求1所述的一种复合保温砌块墙体材料,其特征在于,所述高岭土尾矿为高岭土原矿选矿后经筛分、摇床水洗、去除黄铁矿等工艺后得到的高岭土尾矿。
5.如权利要求1所述的一种复合保温砌块墙体材料,其特征在于,还包括按重量份计的减水剂5~10份。
6.如权利要求1~5任意一项所述的一种复合保温砌块墙体材料的制备方法,其特征在于,具体步骤为:
(1)取厌氧消化污泥装入压滤机中脱水,再干燥研磨粉碎,过100目筛,得预处理厌氧消化污泥;
(2)取粉煤灰、高岭土尾矿,装入球磨机中球磨1~2h,再加入硅灰、石灰,继续球磨20~30min,得复合粉料;
(3)取泡沫玻璃边角料、膨胀珍珠岩、预处理厌氧消化污泥、去离子水,加入混料机中搅拌3~5min,再加入复合粉料,混合均匀后加入普通硅酸盐水泥、胶粉、羟丙基甲基纤维素醚、减水剂,以1200~1500r/min搅拌5~6min,得混合料;
(4)向混合料中加入去离子水,搅拌至呈良好流动性的浆状物后注入模具中,捣实成型,室温静置22~24h后拆模,干燥得保温砌块胚体;
(5)将保温砌块胚体置于温度梯度炉中,以2℃/min升温至400~600℃,保温反应1~2h,再以5℃/min升温至900~950℃,保温烧结2~3h,冷却至室温后,得复合保温砌块墙体材料。
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