CN1028089C - 粉煤灰水浸砖的生产方法 - Google Patents

粉煤灰水浸砖的生产方法 Download PDF

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CN1028089C
CN1028089C CN92107769A CN92107769A CN1028089C CN 1028089 C CN1028089 C CN 1028089C CN 92107769 A CN92107769 A CN 92107769A CN 92107769 A CN92107769 A CN 92107769A CN 1028089 C CN1028089 C CN 1028089C
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fly ash
brick
novel
content
bricks
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CN92107769A
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CN1079947A (zh
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单锦陵
谢恒满
梅龙
赵兴连
陈爱清
贾少群
张启
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PYROELECTRIC CO YANCHENG CITY
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PYROELECTRIC CO YANCHENG CITY
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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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5024—Silicates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

本发明提供了一种利用热电厂废弃物—粉煤灰为原料，生石灰为辅料，石膏为外加剂的新型粉煤灰砖的组分配方及其独特的水浸工艺。从而把粉煤灰的利用率提高到了80%以上，产品质轻、品优、价廉、克服了目前粉煤灰砖中存在的粉煤灰利用率低(一般只在50%左右)，辅料成本高，抗冻融性和抗碳化性差等缺点，是一种具有发展前途的新型砌筑墙体材料。

Description

本发明涉及一种利用热电厂废弃物-粉煤灰为主要原料的建筑用砖的生产方法。
目前建筑行业所使用的建筑用粉煤灰砖大多是加入了粘土做为粘接剂，采用蒸养或蒸压等工艺手段进行生产的，存在着粉煤灰利用率低，如第89109395.8号专利中的粉煤灰砖的粉煤灰含量为60-80%，其余为白灰粉，轧制出的砖坯干燥后用浓度为2%-10%的硅酸钠溶液处理10-30小时，由于白灰粉活性差，浸渍处理时间长，成本高，份量重等缺点，即使是采用水泥做为胶粘剂的粉煤灰砖仍然有着耐久性能差之不足。
本发明目的在于提供一种能将粉煤灰利用率提高到80%以上的新的组分配方和独特的水浸工艺，生产出各项指标达到同尖产品的标准要求的质轻价廉的建筑用砖。
本发明的技术解决方案是：将含SiO2大于40%，含Al2O3大于15%，含水率大于25%的干排或原状湿排粉煤灰轮碾后与含有效CaO达70%以上的生石灰细粉末按80-85比20-15的重量比相混合，加入适量外加剂石膏搅拌均匀后陈化6-8小时，挤压或压制成砖坯，经自然晾干后堆放于浸渍池中，用按一定比例配制的硅酸盐和卤化物及硬脂酸盐的混合水溶液做为浸渍液温度在40-90℃温度下浸渍，其浸渍时间根据浸渍温度不同而异，当砖坯强度达到一定标准要求时即可出池，验收后出厂。按照本发明生产的粉煤灰，其砖体强度的形成机理是：粉煤灰属于CaO-Al2O3-SiO2系统，其矿物组成主要是铝硅玻璃体、少量的石英（-SiO2）和莫来石（3Al2O3-2SiO2）等结晶矿物，铝硅玻璃体是活性主要成分。当粉煤灰和石灰混合后，经过消化，混合料中的CaO消解为Ca（OH）2;在粉煤灰球型玻璃体表面发生化学吸附和浸蚀，从而生成水化硅酸钙;在外加剂石膏的作用下，体系中生成对强度有利的呈凝胶状的水化产物，并逐步转化成纤维晶体状，相互交叉形成连锁结构;再经浸渍，激发剂透过砖的毛细孔渗入到砖体内部，参与水化反应，加速凝胶形成，使砖整体结构更加致密，从而提高了砖体的强度和耐久性。
附图说明：附图为本发明生产工艺流程图
下面结合附图列举实施例对本发明进行进一步描述：将含SiO242%、含Al2O316%、含水率25%的粉煤灰轮碾，将含有效CaO72%的生石灰磨细至80-120目，按80∶20的重量比将上述粉煤灰与生石灰混合，加入石膏0.6份（按上述标准重量单位计）搅拌均匀;陈化6.5小时后挤压成砖坯，自然晾干至含水率10%以下，堆放在浸渍池中;用含激发剂硅酸钠（Na2SiO3）5-10%、氯化钠（NaCl）2.5-3%，硬脂酸钠1-2%的水溶液浸渍;在40℃情况下浸渍6小时，即可使砖体达到规定标准要求，出池后经验收提供使用。
本发明可大大提高粉煤灰的利用率，具有显著的节能利废的社会效益，且其产品抗冻副和抗碳化性能优异，质轻价廉，砌筑性能好，是有前途的新型墙体材料。

Claims (2)

1、一种粉煤灰水浸砖的生产方法，其步骤为：
a、将轮碾后的粉煤灰与石灰细粉末按重量百分比为：80-85∶15-20混合，并加入按上述标准重量单位的0.6份的外加剂石膏；
b、搅拌均匀后陈化6-8小时；
c、挤出或压制成砖坯；
d、自然凉干后堆放入浸渍池中，浸渍液中激发剂含量为：硅酸钠5-10%，氯化钠2.5-3%，硬脂酸钠1-2%；
e、在40-90℃温度下浸渍6-24小时。
2、如权利要求1所述的方法，其特征在于所述粉煤灰中SiO2的含量＞40%，Al2O3的含量＞15%，含水率＜25%，所述石灰粉的CaO含量＞70%，细度为80-120目。
CN92107769A 1992-09-20 1992-09-20 粉煤灰水浸砖的生产方法 Expired - Fee Related CN1028089C (zh)

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Publication number Priority date Publication date Assignee Title
CN105622062B (zh) * 2015-12-30 2018-11-20 涡阳县晟丰新型建材有限公司 减少表面孔隙的粉煤灰砖
CN110482903A (zh) * 2019-09-05 2019-11-22 徐州永腾建材有限公司 一种粉煤灰砖的表面增强剂及其使用方法

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