CN1074235A - 石膏耐水粉 - Google Patents
石膏耐水粉 Download PDFInfo
- Publication number
- CN1074235A CN1074235A CN 93101658 CN93101658A CN1074235A CN 1074235 A CN1074235 A CN 1074235A CN 93101658 CN93101658 CN 93101658 CN 93101658 A CN93101658 A CN 93101658A CN 1074235 A CN1074235 A CN 1074235A
- Authority
- CN
- China
- Prior art keywords
- water
- gypsum
- gypsum powder
- proof
- aluminate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- C04B28/00—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
- C04B28/14—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 calcium sulfate cements
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
一种石膏耐水粉,由水泥熟料、硫酸铝、硅铝酸
盐、塑化剂和缓凝剂组成,其重量百分比为:硅铝酸盐
55~85%;水泥熟料15~40%;硫酸铝1~10%;塑
化剂0.3~1.0%;缓凝剂0.1~0.5%。在石膏粉中掺
入10~30%的石膏耐水粉,可使石膏试件显著提高
耐水性,也能改善其它物理力学性能。该粉价格低
廉,其售价仅为当前各种石膏防水剂的1/5~
1/10,可广泛应用于各种石膏制品。
Description
本发明涉及一种石膏制品的掺加剂。
石膏制品(如纸面石膏板、石膏板空心条板、纤维石膏板等)一般耐水性能都较差,在水中、潮湿或干湿循环条件下使用,强度会大大降低,甚至完全失去强度,使石膏板受到严重破坏。为改善石膏制品的耐水性,有的在石膏中加入各种水溶性合成树脂、沥青、石腊乳液、聚乙烯醇等有机物,或赋以憎水性,或提高其结构的致密性,以达到改善其耐水性的目的。但目前采用的这些外加剂,有的价格太高(每吨达数千元),有的会降低石膏制品的强度。
本发明的目的是提供一种价格低廉的石膏耐水粉,掺入石膏拌和物后,可以显著提高石膏制品的耐水性,并不会降低制品的强度和耐久性。
本发明的石膏耐水粉,含有水泥熟料,其特征在于:还由硫酸铝、硅铝酸盐、塑化剂和缓凝剂组成,其重量百分比为:
硅铝酸盐55~85%;水泥熟料15~40%;硫酸铝1~10%;塑化剂0.3~1.0%;缓凝剂0.1~0.5%。
其中硅铝酸盐可以是硅藻土、粉煤灰或矿渣。塑化剂可以是甲基纤维素或木钙。缓凝剂可以是柠檬酸或硼酸。
石膏耐水粉的生产主要经原材料精选、干燥、混合、磨细等工序。其含水率小于1%,细度(4900孔筛余)小于5%。
石膏耐水粉按其凝结时间分为普通型和缓凝型两类。普通型石膏耐水粉掺入石膏拌和物后,不改变石膏原有的初、终凝时间;
缓凝型石膏耐水粉掺入石膏拌和物后,可根据施工的要求延长初、终凝时间,而不影响其物理力学性能。
掺入方法可采用等量取代石膏粉的方法,掺量一般为石膏粉重量的10~30%。使用时,将石膏耐水粉与石膏粉同时加入搅拌机与水拌和,不需延长搅拌时间。搅拌所需用水量、成型方法均无特殊要求;其养护方法可根据选取的材料和配比,采用自然干燥、人工干燥或在湿热条件下养护。
本发明的优点:可使石膏试件显著提高耐水性,也能改善其它物理力学性能,抗压强度可提高20~40%以上;抗折强度可提高10~30%以上;软化系数大于0.7;泡水24小时后强度高于不泡水的石膏试件;标准稠度用水量比不掺耐水粉减少2~10%;该粉价格低廉,其售价仅为当前各种石膏防水剂的1/5~1/10,与市售的耐水空心条板相比,每平方米的价格可降低5~7元。可广泛应用于纸面石膏板、装饰石膏板、空心条板、纤维石膏板、石膏保温板、石膏砌块和其它石膏制品中。
下面结合实施例对本发明作进一步说明:
实施例:一种缓凝型石膏耐水粉,由40%的水泥熟料、40%的硅藻土、14.5%的粉煤灰、5%的硫酸铝、0.5%的甲基纤维素组成,另加石膏用量0.15%的柠檬酸。细度(4900孔筛余)<5%。
Claims (4)
1、一种石膏耐水粉,含有水泥熟料,其特征在于:还由硫酸铝、硅铝酸盐、塑化剂和缓凝剂组成,其重量百分比为:
硅铝酸盐55~85%;水泥熟料15~40%;硫酸铝1~10%;塑化剂0.3~1.0%;缓凝剂0.1~0.5%。
2、根据权利要求1所述的石膏耐水粉,其特征在于:所述硅铝酸盐可以是硅藻土、粉煤灰或矿渣。
3、根据权利要求1所述的石膏耐水粉,其特征在于:所述塑化剂可以是甲基纤维素或木钙。
4、根据权利要求1所述的石膏耐水粉,其特征在于:所述缓凝剂可以是柠檬酸或硼酸。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 93101658 CN1074235A (zh) | 1993-02-22 | 1993-02-22 | 石膏耐水粉 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 93101658 CN1074235A (zh) | 1993-02-22 | 1993-02-22 | 石膏耐水粉 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN1074235A true CN1074235A (zh) | 1993-07-14 |
Family
ID=4983716
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 93101658 Pending CN1074235A (zh) | 1993-02-22 | 1993-02-22 | 石膏耐水粉 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN1074235A (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009015520A1 (en) * | 2007-08-02 | 2009-02-05 | Basf Construction Chemicals (Shanghai) Co. Ltd | Cement-based grout composition |
CN114538812A (zh) * | 2022-03-17 | 2022-05-27 | 四川龙蟒新材料有限公司 | 一种无水ii型石膏及其制备方法 |
-
1993
- 1993-02-22 CN CN 93101658 patent/CN1074235A/zh active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009015520A1 (en) * | 2007-08-02 | 2009-02-05 | Basf Construction Chemicals (Shanghai) Co. Ltd | Cement-based grout composition |
CN114538812A (zh) * | 2022-03-17 | 2022-05-27 | 四川龙蟒新材料有限公司 | 一种无水ii型石膏及其制备方法 |
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