WO2019051746A1 - Method for preparing building board from fly ash - Google Patents
Method for preparing building board from fly ash Download PDFInfo
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- WO2019051746A1 WO2019051746A1 PCT/CN2017/101810 CN2017101810W WO2019051746A1 WO 2019051746 A1 WO2019051746 A1 WO 2019051746A1 CN 2017101810 W CN2017101810 W CN 2017101810W WO 2019051746 A1 WO2019051746 A1 WO 2019051746A1
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- fly ash
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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
- 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
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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- 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
Definitions
- the invention relates to a method for preparing a building board from fly ash.
- Fly ash is the most discharged industrial solid waste material produced by coal-fired power plants. According to statistics, the total accumulation of fly ash in China will reach more than 3 billion tons by 2020. The problem of fly ash accumulation occupying land and causing air and water pollution, land desertification and alkalization have had a great impact on the environment, and the comprehensive utilization of fly ash is imminent. Building slabs made from fly ash are used to protect the environment and save energy. At present, there are many techniques for preparing fly ash for building panels. In order to ensure the strength of the product, the prior art generally uses traditional materials such as cement or sand as the main raw materials, and the amount of fly ash is small, thus affecting the treatment efficiency of the fly ash.
- a method for preparing a building board from fly ash comprising the steps of: 50-60 parts of fly ash, 25-35 parts of cement, 6-12 parts of sodium hydroxide and 10-20 parts of gypsum by weight Mix well, add 60-70 parts of water to stir for 30-50min, then add 2-5 parts of 5% phosphoric acid solution, stir for 20-40min, then add foaming agent solution, stir for 20-40min, get slurry;
- the mold is placed on the platform, the slurry is poured into a steel mold, and is vibrated on a vibrating table for 25-35 minutes to form a semi-finished sheet; the sample is cured at room temperature for 2-4 hours. After demoulding, it is sent to the autoclave for 5-7d.
- the vibration is formed on the vibrating table for 30 min.
- the sample is cured at room temperature for 3 hours.
- the method after demolding, it is sent to the autoclave for 6d.
- the cured wallboard is immersed in water for 24 hours.
- the method uses fly ash, has simple formula, simple process and low cost, and the prepared building board has good physical properties such as light weight, sound insulation, heat preservation, fire resistance, high strength, good flatness and strong impact resistance.
- a method for preparing a building board from fly ash comprising the steps of: mixing 55 parts of fly ash, 30 parts of cement, 9 parts of sodium hydroxide and 15 parts of gypsum in a weight ratio, adding 65 parts of water and stirring 40min, add 4 parts of 5% phosphoric acid solution, stir for 30min, then add foaming agent solution, stir for 30min, to obtain slurry; put the wallboard mold on the platform, and pour the above slurry into the steel mold forming mold, Vibrating on the vibrating table for 30 min, the upper layer of the slurry is smoothed to obtain a semi-finished sheet; the sample is cured at room temperature for 3 hours, released into the autoclave for 6 days after being demolded, and taken out and then maintained under room temperature ventilation; The cured wallboard was soaked in water for 24 hours, and the obtained crude plate was trimmed, polished, and dried to obtain a wallboard product having a size of 500 ⁇ 500 ⁇ 90 mm.
- a method for preparing a building board from fly ash comprising the steps of: uniformly mixing 50 parts of fly ash, 25 parts of cement, 6 parts of sodium hydroxide and 10 parts of gypsum by weight, adding 60 parts of water and stirring 30 min, add 2 parts of 5% phosphoric acid solution, stir for 20 min, then add foaming agent solution, stir for 20 min to obtain slurry; put the wallboard mold on the platform, and pour the above slurry into the steel mold forming mold, Vibrating on a vibrating table for 25 min, the upper layer of the slurry is smoothed to obtain a semi-finished sheet; the sample is cured at room temperature for 2 hours, released into the autoclave for 5 days after being demolded, and taken out and then maintained under room temperature ventilation; The cured wallboard was immersed in water for 22 hours, and the obtained crude plate was trimmed, polished, and dried to obtain a wallboard product having a size of 500 ⁇ 500 ⁇ 90 mm.
- a method for preparing a building board from fly ash comprising the steps of: mixing 60 parts of fly ash, 35 parts of cement, 12 parts of sodium hydroxide and 20 parts of gypsum in a weight ratio, adding 70 parts of water and stirring 50 min, add 5 parts of 5% phosphoric acid solution, stir for 40 min, then add foaming agent solution, stir for 40 min to obtain slurry; put the wallboard mold on the platform, and pour the above slurry into the steel mold forming mold, Vibrating on the vibrating table for 35 min, the upper layer of the slurry is smoothed to obtain a semi-finished sheet; the sample is cured at room temperature for 4 hours, released into the autoclave for 7 days after being demolded, and taken out and then maintained under room temperature ventilation; The cured wallboard was soaked in water for 26 hours, and the obtained crude plate was trimmed, polished, and dried to obtain a wallboard product having a size of 500 ⁇ 500 ⁇ 90 mm.
- the method uses fly ash, has simple formula, simple process and low cost, and the prepared building board has good physical properties such as light weight, sound insulation, heat preservation, fire resistance, high strength, good flatness and strong impact resistance.
Abstract
Disclosed is a method for preparing a building board from fly ash, comprising the following steps: mixing 50-60 parts of fly ash, 25-35 parts of cement, 6-12 parts of sodium hydroxide and 10-20 parts of gypsum in parts by weight until uniform, adding 60-70 parts of water and stirring same for 30 min-50 min, then adding 2-5 parts of a 5% phosphoric acid solution and stirring same for 20 min-40 min, and then adding a foaming agent solution and stirring same for 20 min-40 min to obtain a slurry; casting the slurry into a mold, vibrating same for 25 min-35 min for molding same so as to obtain a semi-finished board; curing a sample for 2-4 hours at room temperature, feeding same into an autoclave for 5 d-7 d after demolding, and continuously maintaining same under the condition of ventilation at room temperature after taking same out; immersing a wallboard in water for 22 h-26 h, trimming, polishing, and drying the resulting board crude product so as to obtain the building board. The method has a simple process and low cost, and the board prepared by the method has properties such as a light weight, sound insulation, and strong fire and impact resistances.
Description
本发明涉及一种用粉煤灰制备建筑用板材的方法。The invention relates to a method for preparing a building board from fly ash.
粉煤灰是燃煤电厂产生的、排放量最大的工业固体废弃物料。据统计，我国到2020年粉煤灰总堆积量将达到30多亿吨。粉煤灰堆积占用土地和造成的空气及水质污染，土地沙化碱化等问题已经对环境产生了较大影响，综合利用粉煤灰迫在眉睫。使用粉煤灰为原料制备的建筑用板材，既保护环境，又节约能源。目前将粉煤灰用于制备建筑用板材的技术较多。现有技术为确保产品的强度，普遍以水泥或沙子等传统材料为主要原料，粉煤灰用量较小，因而影响了粉煤灰的处理效率。为了提高粉煤灰的用量，同时保证产品的质量，则通常需要在原料中加入多种其他物料进行调配，导致工艺复杂且成本较高。当前，建筑墙体结构因其导热系数过大，保温隔热性能较低而制约着建筑节能的发展。通过研究新型保温墙体材料来改善建筑物的热量传递、减少热量传递带来的损失，成为提高建筑物能源利用率的发展趋势。Fly ash is the most discharged industrial solid waste material produced by coal-fired power plants. According to statistics, the total accumulation of fly ash in China will reach more than 3 billion tons by 2020. The problem of fly ash accumulation occupying land and causing air and water pollution, land desertification and alkalization have had a great impact on the environment, and the comprehensive utilization of fly ash is imminent. Building slabs made from fly ash are used to protect the environment and save energy. At present, there are many techniques for preparing fly ash for building panels. In order to ensure the strength of the product, the prior art generally uses traditional materials such as cement or sand as the main raw materials, and the amount of fly ash is small, thus affecting the treatment efficiency of the fly ash. In order to increase the amount of fly ash and ensure the quality of the product, it is usually necessary to add a variety of other materials to the raw materials for mixing, resulting in a complicated process and high cost. At present, the construction wall structure restricts the development of building energy conservation because of its large thermal conductivity and low thermal insulation performance. By researching new insulation wall materials to improve the heat transfer of buildings and reduce the loss caused by heat transfer, it has become a development trend to improve the energy efficiency of buildings.
发明内容Summary of the invention
本发明的目的在于提供一种用粉煤灰制备建筑用板材的方法。It is an object of the present invention to provide a method of preparing a building board from fly ash.
本发明通过下面技术方案实现：The invention is achieved by the following technical solutions:
一种用粉煤灰制备建筑用板材的方法，包括如下步骤：以重量份计，将50-60份粉煤灰、25-35份水泥，6-12份氢氧化钠和10-20份石膏混合均匀，加入60-70份水搅拌30-50min，再加入2-5份5％的磷酸溶液，搅拌20-40min，再加入发泡剂溶液，搅拌20-40min，得到料浆；将墙板模具放在平台上，将上述料浆浇注到钢模成型模具中，在振动台上振动25-35min成型，将上层料浆抹平，得到半成品板材；将试样在室温下固化2-4小时，脱模后送入蒸压釜中5-7d，取出后在室温通风条件下继续养护；将养护好的的墙板放在水中浸泡22-26h，将得到的板材粗品进行切边，打磨，干燥后得到尺寸为500×500×90mm的墙板产品。A method for preparing a building board from fly ash, comprising the steps of: 50-60 parts of fly ash, 25-35 parts of cement, 6-12 parts of sodium hydroxide and 10-20 parts of gypsum by weight Mix well, add 60-70 parts of water to stir for 30-50min, then add 2-5 parts of 5% phosphoric acid solution, stir for 20-40min, then add foaming agent solution, stir for 20-40min, get slurry; The mold is placed on the platform, the slurry is poured into a steel mold, and is vibrated on a vibrating table for 25-35 minutes to form a semi-finished sheet; the sample is cured at room temperature for 2-4 hours. After demoulding, it is sent to the autoclave for 5-7d. After being taken out, it is maintained under the condition of room temperature ventilation; the cured wallboard is soaked in water for 22-26h, and the obtained crude plate is trimmed and polished. After drying, a wallboard product having a size of 500 x 500 x 90 mm was obtained.
优选地，所述的方法中，将55份粉煤灰、30份水泥，9份氢氧化钠和15份石膏混合均匀。Preferably, in the method, 55 parts of fly ash, 30 parts of cement, 9 parts of sodium hydroxide and 15 parts of gypsum are uniformly mixed.
优选地，所述的方法中，加入65份水搅拌40min。Preferably, in the method, 65 parts of water is added and stirred for 40 minutes.
优选地，所述的方法中，在振动台上振动30min成型。Preferably, in the method, the vibration is formed on the vibrating table for 30 min.
优选地，所述的方法中，将试样在室温下固化3小时。Preferably, in the method, the sample is cured at room temperature for 3 hours.
优选地，所述的方法中，脱模后送入蒸压釜中6d。Preferably, in the method, after demolding, it is sent to the autoclave for 6d.
优选地，所述的方法中，将养护好的的墙板放在水中浸泡24h。
Preferably, in the method, the cured wallboard is immersed in water for 24 hours.
本发明技术效果：The technical effect of the invention:
该方法使用粉煤灰，配方简单，工艺简单、成本低，制备的建筑板材具有轻质、隔音、保温、耐火、强度高、平整度好、耐冲击能力强等良好物理性能。The method uses fly ash, has simple formula, simple process and low cost, and the prepared building board has good physical properties such as light weight, sound insulation, heat preservation, fire resistance, high strength, good flatness and strong impact resistance.
下面结合实施例具体介绍本发明的实质性内容。The substantial content of the present invention will be specifically described below with reference to the embodiments.
实施例1Example 1
一种用粉煤灰制备建筑用板材的方法，包括如下步骤：以重量份计，将55份粉煤灰、30份水泥，9份氢氧化钠和15份石膏混合均匀，加入65份水搅拌40min，再加入4份5％的磷酸溶液，搅拌30min，再加入发泡剂溶液，搅拌30min，得到料浆；将墙板模具放在平台上，将上述料浆浇注到钢模成型模具中，在振动台上振动30min成型，将上层料浆抹平，得到半成品板材；将试样在室温下固化3小时，脱模后送入蒸压釜中6d，取出后在室温通风条件下继续养护；将养护好的的墙板放在水中浸泡24h，将得到的板材粗品进行切边，打磨，干燥后得到尺寸为500×500×90mm的墙板产品。A method for preparing a building board from fly ash, comprising the steps of: mixing 55 parts of fly ash, 30 parts of cement, 9 parts of sodium hydroxide and 15 parts of gypsum in a weight ratio, adding 65 parts of water and stirring 40min, add 4 parts of 5% phosphoric acid solution, stir for 30min, then add foaming agent solution, stir for 30min, to obtain slurry; put the wallboard mold on the platform, and pour the above slurry into the steel mold forming mold, Vibrating on the vibrating table for 30 min, the upper layer of the slurry is smoothed to obtain a semi-finished sheet; the sample is cured at room temperature for 3 hours, released into the autoclave for 6 days after being demolded, and taken out and then maintained under room temperature ventilation; The cured wallboard was soaked in water for 24 hours, and the obtained crude plate was trimmed, polished, and dried to obtain a wallboard product having a size of 500×500×90 mm.
实施例2Example 2
一种用粉煤灰制备建筑用板材的方法，包括如下步骤：以重量份计，将50份粉煤灰、25份水泥，6份氢氧化钠和10份石膏混合均匀，加入60份水搅拌30min，再加入2份5％的磷酸溶液，搅拌20min，再加入发泡剂溶液，搅拌20min，得到料浆；将墙板模具放在平台上，将上述料浆浇注到钢模成型模具中，在振动台上振动25min成型，将上层料浆抹平，得到半成品板材；将试样在室温下固化2小时，脱模后送入蒸压釜中5d，取出后在室温通风条件下继续养护；将养护好的的墙板放在水中浸泡22h，将得到的板材粗品进行切边，打磨，干燥后得到尺寸为500×500×90mm的墙板产品。A method for preparing a building board from fly ash, comprising the steps of: uniformly mixing 50 parts of fly ash, 25 parts of cement, 6 parts of sodium hydroxide and 10 parts of gypsum by weight, adding 60 parts of water and stirring 30 min, add 2 parts of 5% phosphoric acid solution, stir for 20 min, then add foaming agent solution, stir for 20 min to obtain slurry; put the wallboard mold on the platform, and pour the above slurry into the steel mold forming mold, Vibrating on a vibrating table for 25 min, the upper layer of the slurry is smoothed to obtain a semi-finished sheet; the sample is cured at room temperature for 2 hours, released into the autoclave for 5 days after being demolded, and taken out and then maintained under room temperature ventilation; The cured wallboard was immersed in water for 22 hours, and the obtained crude plate was trimmed, polished, and dried to obtain a wallboard product having a size of 500×500×90 mm.
实施例3Example 3
一种用粉煤灰制备建筑用板材的方法，包括如下步骤：以重量份计，将60份粉煤灰、35份水泥，12份氢氧化钠和20份石膏混合均匀，加入70份水搅拌50min，再加入5份5％的磷酸溶液，搅拌40min，再加入发泡剂溶液，搅拌40min，得到料浆；将墙板模具放在平台上，将上述料浆浇注到钢模成型模具中，在振动台上振动35min成型，将上层料浆抹平，得到半成品板材；将试样在室温下固化4小时，脱模后送入蒸压釜中7d，取出后在室温通风条件下继续养护；将养护好的的墙板放在水中浸泡26h，将得到的板材粗品进行切边，打磨，干燥后得到尺寸为500×500×90mm的墙板产品。A method for preparing a building board from fly ash, comprising the steps of: mixing 60 parts of fly ash, 35 parts of cement, 12 parts of sodium hydroxide and 20 parts of gypsum in a weight ratio, adding 70 parts of water and stirring 50 min, add 5 parts of 5% phosphoric acid solution, stir for 40 min, then add foaming agent solution, stir for 40 min to obtain slurry; put the wallboard mold on the platform, and pour the above slurry into the steel mold forming mold, Vibrating on the vibrating table for 35 min, the upper layer of the slurry is smoothed to obtain a semi-finished sheet; the sample is cured at room temperature for 4 hours, released into the autoclave for 7 days after being demolded, and taken out and then maintained under room temperature ventilation; The cured wallboard was soaked in water for 26 hours, and the obtained crude plate was trimmed, polished, and dried to obtain a wallboard product having a size of 500×500×90 mm.
该方法使用粉煤灰，配方简单，工艺简单、成本低，制备的建筑板材具有轻质、隔音、保温、耐火、强度高、平整度好、耐冲击能力强等良好物理性能。
The method uses fly ash, has simple formula, simple process and low cost, and the prepared building board has good physical properties such as light weight, sound insulation, heat preservation, fire resistance, high strength, good flatness and strong impact resistance.
Claims (7)
- 一种用粉煤灰制备建筑用板材的方法，其特征在于包括如下步骤：以重量份计，将50-60份粉煤灰、25-35份水泥，6-12份氢氧化钠和10-20份石膏混合均匀，加入60-70份水搅拌30-50min，再加入2-5份5％的磷酸溶液，搅拌20-40min，再加入发泡剂溶液，搅拌20-40min，得到料浆；将墙板模具放在平台上，将上述料浆浇注到钢模成型模具中，在振动台上振动25-35min成型，将上层料浆抹平，得到半成品板材；将试样在室温下固化2-4小时，脱模后送入蒸压釜中5-7d，取出后在室温通风条件下继续养护；将养护好的的墙板放在水中浸泡22-26h，将得到的板材粗品进行切边，打磨，干燥后得到尺寸为500×500×90mm的墙板产品。A method for preparing a building board from fly ash, comprising the steps of: 50-60 parts of fly ash, 25-35 parts of cement, 6-12 parts of sodium hydroxide and 10-part by weight 20 parts of gypsum are mixed evenly, add 60-70 parts of water and stir for 30-50min, then add 2-5 parts of 5% phosphoric acid solution, stir for 20-40min, then add foaming agent solution, stir for 20-40min, to obtain slurry; Place the wallboard mold on the platform, pour the above slurry into the steel mold forming mold, vibrate on the vibrating table for 25-35 minutes, and smooth the upper layer to obtain the semi-finished sheet; solidify the sample at room temperature. -4 hours, after demoulding, it is sent to the autoclave for 5-7d, and then taken out and then maintained under room temperature ventilation; the cured wallboard is immersed in water for 22-26h, and the obtained crude plate is trimmed. After grinding and drying, a wallboard product having a size of 500×500×90 mm is obtained.
- 根据权利要求1所述的方法，其特征在于：将55份粉煤灰、30份水泥，9份氢氧化钠和15份石膏混合均匀。The method according to claim 1, characterized in that 55 parts of fly ash, 30 parts of cement, 9 parts of sodium hydroxide and 15 parts of gypsum are uniformly mixed.
- 根据权利要求1所述的方法，其特征在于：加入65份水搅拌40min。The method of claim 1 wherein 65 parts of water are added and stirred for 40 minutes.
- 根据权利要求1所述的方法，其特征在于：在振动台上振动30min成型。The method according to claim 1, wherein the molding is performed by shaking on a vibrating table for 30 minutes.
- 根据权利要求1所述的方法，其特征在于：将试样在室温下固化3小时。The method of claim 1 wherein the sample is cured at room temperature for 3 hours.
- 根据权利要求1所述的方法，其特征在于：脱模后送入蒸压釜中6d。The method of claim 1 wherein after demolding, it is fed to an autoclave for 6d.
- 根据权利要求1所述的方法，其特征在于：将养护好的的墙板放在水中浸泡24h。 The method of claim 1 wherein the cured wallboard is immersed in water for 24 hours.
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| US20140264140A1 (en) * | 2013-03-14 | 2014-09-18 | The Catholic University Of America | High-strength geopolymer composite cellular concrete |
| CN103755255A (en) * | 2013-12-27 | 2014-04-30 | 中国神华能源股份有限公司 | Method for preparing building sheet material by using coal ash and product prepared by using method |
| CN103864455A (en) * | 2014-03-14 | 2014-06-18 | 昆明理工大学 | Method for yellow phosphorus slag base aerated building blocks |
| CN105967535A (en) * | 2016-05-11 | 2016-09-28 | 广州市建筑科学研究院有限公司 | Geopolymer foamed concrete, foamed concrete sandwich composite thermal insulation wallboard and preparation method |
| CN106220216A (en) * | 2016-07-11 | 2016-12-14 | 中国矿业大学(北京) | A kind of high-strength mining expansion filling fireproofing extinguishing materials and using method thereof |
| CN106220057A (en) * | 2016-07-21 | 2016-12-14 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | A kind of coal base solid waste foaming thermal-insulating and preparation method thereof |
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