CN106082852A - 一种具有双级孔的硅酸盐水泥质发泡保温隔热板的制备方法 - Google Patents
一种具有双级孔的硅酸盐水泥质发泡保温隔热板的制备方法 Download PDFInfo
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- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C—CHEMISTRY; METALLURGY
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
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- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
本发明所提供的发泡保温隔热板的制备方法,是将硅酸盐水泥熟料和调凝剂混合,磨细至约400m2/Kg,加水搅拌5~10min,将加入发泡剂,继续搅拌10~15min,然后将浆体注入磨具中,在25~30℃养护至14~28天。本发明采用两种发泡剂,并用特定组成的调凝剂控制泡的长大时间,使板材中大、小泡共存,会增强断桥隔热作用,从而有低的导热系数,保证了水泥发泡板在具有低导热系数的条件下,同时具有较高的力学强度,发泡板材的最低导热系数为0.05W/(m.k),抗压强度达0.75MPa。在工艺方面,具有原料组成少,工艺流程短的优点。
Description
技术领域
本发明属于建筑材料领域,具体涉及一种具有双级孔的硅酸盐水泥质发泡保温隔热板的制备方法。
背景技术
随着建筑节能科技的发展,各种发泡保温板都在使用,发泡保温板分为有机板和无机板,有机板常用的有发泡丙烯板、发泡挤塑板、聚氨酯板,有机板存在的最大缺点是容易燃烧,而且燃烧后的烟雾对人体和环境有害,有些有机板中加入了阻燃剂,但是在高温的情况下,有机物还会分解燃烧,所以安全性差。无机板常用的有硅钙板、岩棉板和发泡水泥板,无机板通常都能够阻燃并耐高温,不会产生火灾,但都存在致命的弱点是容重大,强度低,导热系数高。
水泥发泡保温板,属于无机保温板的一种,是指使用发泡水泥技术制造的保温板。专利CN 103664113 B通过加入孔结构调节剂、黏度调节剂、防水剂、抗开裂组分及减水剂来制备一种超细水泥基发泡保温板,但存在吸水率大、导热系数大及抗压强度低等问题。专利CN 102303979A涉及轻体防火保温板及其生产方法,利用氧化剂、稳定剂与水泥反应产生气体形成多孔结构,抗压强度较高、导热系数较低,但所加助剂过多,生产过程不易控制且工艺成本高。目前,现有的水泥发泡保温隔热板存在导热系数大、吸水量大及干燥收缩大等问题,根本的原因是若提高孔隙率,可获得导热系数小的发泡板,但同时板材的力学强度低,这是个尚未解决的矛盾。
发明内容
发明目的:针对现有技术中的不足之处,本发明提供了一种具有双级孔的硅酸盐水泥质发泡保温隔热板的制备方法。
技术方案:本发明所提供的发泡保温隔热板的制备方法,是将硅酸盐水泥熟料和调凝剂混合,磨细至约400m2/Kg,加水搅拌5~10min,将加入发泡剂,继续搅拌10~15min,然后将浆体注入磨具中,在25~30℃养护至14~28天。
上述的制备方法中,所述各原料的质量百分数为
所述的调凝剂由碳酸钙、碳酸钠、碳酸氢钠、二氧化硅气凝胶、氧化铜和氧化锌组成。具体的,所述的调凝剂的质量组成为:碳酸钙15~30%、碳酸钠20~35%、碳酸氢钠20~35%、二氧化硅气凝胶5~20%、氧化铜1~10%、氧化锌1~10%。该调凝剂具有准确调节硅酸盐水泥熟料凝结时间的特性,可实现水泥初凝时间在3min~1h精确调控,且水泥的初凝与终凝时相隔不超过5min。
所述的发泡剂为铝粉和双氧水,两者占产品的质量百分比为:铝粉0.1~3%,双氧水1~10%。其中铝粉产生大孔径的孔,双氧水产生小孔径的孔,两者的质量掺量以最终产品的导热系数和抗压强度最优而定。两种发泡剂产生的孔在水泥浆体中均会长大,本发明采用上述特定组成的水泥熟料调凝剂,通过调节调凝剂的组成及掺量,可控制水泥浆体的凝结时间,从而可控制两种泡各自的尺寸,使得板材中泡尺寸以两种直径存在,形成大、小泡共存的发泡板,既使泡壁较厚,从而有高的力学强度,又使板材的孔隙率较高,从而具有低的导热系数。对于本发明来说铝粉与双氧水的最佳使用量为铝粉0.5%,双氧水2%。
有益效果:本发明采用两种发泡剂,并用特定组成的调凝剂控制泡的长大时间,使板材中大、小泡共存,会增强断桥隔热作用,从而有低的导热系数,保证了水泥发泡板在具有低导热系数的条件下,同时具有较高的力学强度,发泡板材的最低导热系数为0.05W/(m.k),抗压强度达0.75MPa。在工艺方面,具有原料组成少,工艺流程短的优点。
具体实施方式:
实施例1
其基本组成按质量百分数包括以下组分:
制备方法为:一种具有双级孔的硅酸盐水泥质发泡保温隔热板的制备方法,其特征在于将硅酸盐水泥熟料和调凝剂混合,磨细至约400m2/Kg,加水搅拌5~10min,将加入发泡剂,继续搅拌10~15min,然后将浆体注入磨具中,在25~30℃养护至14~28天。
实施例2
其基本组成按质量百分数包括以下组分:
制备方法为:一种具有双级孔的硅酸盐水泥质发泡保温隔热板的制备方法,其特征在于将硅酸盐水泥熟料和调凝剂混合,磨细至约400m2/Kg,加水搅拌5~10min,将加入发泡剂,继续搅拌10~15min,然后将浆体注入磨具中,在25~30℃养护至14~28天。
实施例3
其基本组成按质量百分数包括以下组分:
制备方法为:一种具有双级孔的硅酸盐水泥质发泡保温隔热板的制备方法,其特征在于将硅酸盐水泥熟料和调凝剂混合,磨细至约400m2/Kg,加水搅拌5~10min,将加入发泡剂,继续搅拌10~15min,然后将浆体注入磨具中,在25~30℃养护至14~28天。
实施例4
其基本组成按质量百分数包括以下组分:
制备方法为:一种具有双级孔的硅酸盐水泥质发泡保温隔热板的制备方法,其特征在于将硅酸盐水泥熟料和调凝剂混合,磨细至约400m2/Kg,加水搅拌5~10min,将加入发泡剂,继续搅拌10~15min,然后将浆体注入磨具中,在25~30℃养护至14~28天。
实施例5
其基本组成按质量百分数包括以下组分:
制备方法为:一种具有双级孔的硅酸盐水泥质发泡保温隔热板的制备方法,其特征在于将硅酸盐水泥熟料和调凝剂混合,磨细至约400m2/Kg,加水搅拌5~10min,将加入发泡剂,继续搅拌10~15min,然后将浆体注入磨具中,在25~30℃养护至14~28天。
实施例6
其基本组成按质量百分数包括以下组分:
制备方法为:一种具有双级孔的硅酸盐水泥质发泡保温隔热板的制备方法,其特征在于将硅酸盐水泥熟料和调凝剂混合,磨细至约400m2/Kg,加水搅拌5~10min,将加入发泡剂,继续搅拌10~15min,然后将浆体注入磨具中,在25~30℃养护至14~28天。
实施例7
其基本组成按质量百分数包括以下组分:
制备方法为:一种具有双级孔的硅酸盐水泥质发泡保温隔热板的制备方法,其特征在于将硅酸盐水泥熟料和调凝剂混合,磨细至约400m2/Kg,加水搅拌5~10min,将加入发泡剂,继续搅拌10~15min,然后将浆体注入磨具中,在25~30℃养护至14~28天。
各实施性能结果如下
Claims (5)
1.一种具有双级孔的硅酸盐水泥质发泡保温隔热板的制备方法,其特征在于将硅酸盐水泥熟料和调凝剂混合,磨细至约400m2/Kg,加水搅拌5~10min,再加入发泡剂,继续搅拌10~15min,然后将浆体注入磨具中,在25~30℃养护至14~28天。
2.根据权利要求1所述的制备方法,其特征在于所述各原料的质量百分数为
3.根据权利要求1所述的制备方法,其特征在于所述的调凝剂由碳酸钙、碳酸钠、碳酸氢钠、二氧化硅气凝胶、氧化铜和氧化锌组成。
4.根据权利要求1所述的制备方法,其特征在于所述的调凝剂的质量组成为:碳酸钙15~30%、碳酸钠20~35%、碳酸氢钠20~35%、二氧化硅气凝胶5~20%、氧化铜1~10%、氧化锌1~10%。
5.根据权利要求1所述的制备方法,其特征在于所述的发泡剂为铝粉和双氧水,两者占产品的质量百分比为:铝粉0.1~3%,双氧水1~10%。
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CN106966644A (zh) * | 2017-04-11 | 2017-07-21 | 商洛学院 | 一种制作发泡水泥板的组合物及方法 |
CN115010513A (zh) * | 2021-12-29 | 2022-09-06 | 贺州学院 | 一种水泥基多孔吸音板及其制备方法 |
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CN102701649A (zh) * | 2012-05-14 | 2012-10-03 | 杭州正博新型建筑材料有限公司 | 无机水泥发泡保温板及其制备方法 |
CN102863251A (zh) * | 2012-10-10 | 2013-01-09 | 信阳天意节能技术有限公司 | 硅酸盐水泥发泡保温板材或砌块及其制作方法 |
CN105621920A (zh) * | 2014-10-26 | 2016-06-01 | 武汉鸿信通科技有限公司 | 一种水泥用促凝剂 |
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JPH0360481A (ja) * | 1989-07-25 | 1991-03-15 | Matsushita Electric Works Ltd | 軽量気泡セメント板の製造方法 |
CN102372495A (zh) * | 2011-08-16 | 2012-03-14 | 天津市得全轻质板制造有限公司 | 水泥发泡保温板、其制备方法及应用 |
CN102701649A (zh) * | 2012-05-14 | 2012-10-03 | 杭州正博新型建筑材料有限公司 | 无机水泥发泡保温板及其制备方法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106966644A (zh) * | 2017-04-11 | 2017-07-21 | 商洛学院 | 一种制作发泡水泥板的组合物及方法 |
CN115010513A (zh) * | 2021-12-29 | 2022-09-06 | 贺州学院 | 一种水泥基多孔吸音板及其制备方法 |
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