CN113979716B - Preparation method of magnesium oxysulfate cementing material adopting silicon dioxide aerogel and building component - Google Patents

Preparation method of magnesium oxysulfate cementing material adopting silicon dioxide aerogel and building component Download PDF

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CN113979716B
CN113979716B CN202111593559.6A CN202111593559A CN113979716B CN 113979716 B CN113979716 B CN 113979716B CN 202111593559 A CN202111593559 A CN 202111593559A CN 113979716 B CN113979716 B CN 113979716B
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magnesium
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CN113979716A (en
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赵莹
刘继雅
车擎宇
赵雅茹
王静
张晓龙
徐晓阳
张向京
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Hebei University of Science and Technology
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/30Compositions 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 magnesium cements or similar cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02Granular materials, e.g. microballoons
    • C04B14/04Silica-rich materials; Silicates
    • C04B14/06Quartz; Sand
    • C04B14/064Silica aerogel
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32Mortars, 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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Abstract

本发明提供了一种采用二氧化硅气凝胶的硫氧镁胶凝材料、制备方法及建筑物构件。本发明的采用二氧化硅气凝胶的硫氧镁胶凝材料包括A组分和B组分,其中:A组分按摩尔比包括1份七水硫酸镁、8~12份轻烧氧化镁和15~22份水,且轻烧氧化镁中活性氧化镁的含量在55%~65%;B组分包括改性剂和气凝胶;改性剂为柠檬酸、酒石酸和苹果酸钠中的一种,或柠檬酸和酒石酸的混合物,柠檬酸为轻烧氧化镁质量的0.7%~0.8%,酒石酸和苹果酸钠均为轻烧氧化镁质量的1.3%~1.8%;气凝胶为轻烧氧化镁质量的6%以下。本发明的采用二氧化硅气凝胶的硫氧镁胶凝材料,有助于改善硫氧镁胶凝建材的力学性能和保温性能。

Figure 202111593559

The invention provides a magnesium oxysulfide cementitious material using silica aerogel, a preparation method and a building component. The magnesium oxysulfide gelling material using silica aerogel of the present invention includes A component and B component, wherein: A component includes 1 part of magnesium sulfate heptahydrate, 8 to 12 parts of light-burned magnesium oxide in molar ratio and 15~22 parts of water, and the content of active magnesium oxide in lightly burned magnesium oxide is 55%~65%; B component includes modifier and aerogel; modifier is citric acid, tartaric acid and sodium malate. One, or a mixture of citric acid and tartaric acid, citric acid is 0.7% to 0.8% of the mass of light-burned magnesium oxide, tartaric acid and sodium malate are both 1.3% to 1.8% of the mass of light-burned magnesium oxide; Less than 6% of the mass of calcined magnesium oxide. The magnesium oxysulfide cementitious material using silica aerogel of the present invention helps to improve the mechanical properties and thermal insulation performance of the magnesium oxysulfide cementitious building materials.

Figure 202111593559

Description

采用二氧化硅气凝胶的硫氧镁胶凝材料的制备方法及建筑物 构件Preparation method and building of magnesium oxysulfide cementitious material using silica aerogel member

技术领域technical field

本发明涉及建筑材料技术领域,特别涉及一种采用二氧化硅气凝胶的硫氧镁胶凝材料的制备方法。另外,本发明还涉及一种建筑物构件。The invention relates to the technical field of building materials, in particular to a preparation method of a magnesium oxysulfide gelling material using silica aerogel. In addition, the present invention also relates to a building element.

背景技术Background technique

硫氧镁胶凝材料作为新型建筑材料,主要由轻烧氧化镁和七水硫酸镁溶液混合制成,具有质量轻、体积稳定性好、抗折强度高、耐火、保温隔热等性能,其应用越来越广泛。而各种成分的差别会对硫氧镁胶凝材料的性能产生重大的影响;而制备硫氧镁胶凝材料时,由于原料摩尔的比重不同以及掺入的化学试剂的量不同所得到的硫氧镁胶凝材料的物理性能会变化,现有的制备方法制得的硫氧镁胶凝材料的导热系数高,且抗折抗压、软化系数等物理性能低。As a new type of building material, magnesium oxysulfide cementitious material is mainly made of light-burned magnesium oxide and magnesium sulfate heptahydrate solution. It has the properties of light weight, good volume stability, high flexural strength, fire resistance, thermal insulation and other properties. Applications are becoming more and more widespread. The difference of various components will have a significant impact on the performance of the magnesium oxysulfide cementitious material; and when preparing the magnesium oxysulfide cementitious material, due to the different molar proportions of the raw materials and the amount of chemical reagents added, the obtained sulfur The physical properties of the oxymagnesium cementitious material will change, and the magnesium oxysulfide cementitious material prepared by the existing preparation method has high thermal conductivity, and low physical properties such as flexural resistance, compression resistance, softening coefficient and the like.

气凝胶是一种固体物质形态,世界上密度最小的固体。气凝胶的种类较多,有硅系,碳系,硫系,金属氧化物系或金属系等,一般常见的为硅气凝胶。由于硅气凝胶纤细的纳米网络结构有效地限制了局域热激发的传播,其固态热导率比相应的玻璃态材料低2-3个数量级,是热导率最低的固态材料,可望成为新型隔热材料。由于气凝胶材料是一类新型的纳米材料,且具备多孔网络骨架结构,大的比表面积,并且材料的内部由于90 %以上的体积都为空气而导致内部的密度极为低,进而导致了导热系数极低,气凝胶用作建筑工程材料所具备了绿色节能与轻质量化的优势。Aerogel is a form of solid matter, the least dense solid in the world. There are many types of aerogels, including silicon-based, carbon-based, sulfur-based, metal oxide-based or metal-based, etc. The most common is silicon aerogel. Since the fine nano-network structure of silica aerogel effectively limits the propagation of localized thermal excitation, its solid-state thermal conductivity is 2-3 orders of magnitude lower than the corresponding glassy materials, and it is the solid-state material with the lowest thermal conductivity. Become a new type of thermal insulation material. Because the aerogel material is a new type of nanomaterial, it has a porous network skeleton structure, a large specific surface area, and the internal density of the material is extremely low because more than 90% of the volume is air, which leads to thermal conductivity. The coefficient is extremely low, and aerogel has the advantages of green energy saving and light weight when used as a building engineering material.

随着我国经济快速发展,对建筑材料的需求越来越旺盛,由于生产传统的建筑材料污染严重、能耗高,依据资源节约型和环境友好的要求,对新型建筑材料有更强烈的需求。镁质胶凝材料被誉为“21世纪绿色的工程建筑材料”,作为一种新型绿色保温效果好的复合材料。With the rapid development of my country's economy, the demand for building materials is becoming more and more strong. Due to the serious pollution and high energy consumption of traditional building materials, there is a stronger demand for new building materials according to the requirements of resource conservation and environmental friendliness. Magnesium cementitious materials are known as "green engineering building materials in the 21st century", as a new type of green composite material with good thermal insulation effect.

但是,现有硫氧镁胶凝材料制备中,缺乏添加气凝胶的方法和相关研究;导致现有的硫氧镁胶凝材料隔热、保温形成存在不足,同时,直接在硫氧镁胶凝材料中加入气凝胶,容易导致材料的力学性能减弱,因此,有必要对硫氧镁胶凝材料中气凝胶及有关改性剂的添加工艺进行深入地研究。However, in the preparation of the existing magnesium oxysulfide cementitious materials, there is a lack of methods and related researches for adding aerogels; this leads to insufficient thermal insulation and thermal insulation formation of the existing magnesium oxysulfide cementitious materials. Adding aerogel to the cementitious material will easily lead to the weakening of the mechanical properties of the material. Therefore, it is necessary to conduct in-depth research on the addition process of aerogel and related modifiers in the magnesium oxysulfide cementitious material.

发明内容SUMMARY OF THE INVENTION

有鉴于此,本发明旨在提出一种采用二氧化硅气凝胶的硫氧镁胶凝材料的制备方法,以改善硫氧镁胶凝建材的力学性能和保温性能。In view of this, the present invention aims to provide a preparation method of a magnesium oxysulfide cementitious material using silica aerogel, so as to improve the mechanical properties and thermal insulation properties of the magnesium oxysulfide cementitious building materials.

为达到上述目的,本发明的技术方案是这样实现的:In order to achieve the above object, the technical scheme of the present invention is achieved in this way:

一种采用二氧化硅气凝胶的硫氧镁胶凝材料,包括A组分和B组分,其中:A magnesium oxysulfide cementitious material using silica aerogel, comprising A component and B component, wherein:

所述A组分按摩尔比包括1份七水硫酸镁、8~12份轻烧氧化镁和15~22份水,且轻烧氧化镁中活性氧化镁的含量在55%~65%;The A component comprises 1 part of magnesium sulfate heptahydrate, 8 to 12 parts of light-burned magnesium oxide and 15 to 22 parts of water in molar ratio, and the content of active magnesium oxide in the light-burned magnesium oxide is 55% to 65%;

所述B组分包括改性剂和气凝胶;所述改性剂为柠檬酸、酒石酸和苹果酸钠中的一种,或柠檬酸和酒石酸的混合物,所述柠檬酸为轻烧氧化镁质量的0.7%~0.8%,所述酒石酸和所述苹果酸钠均为轻烧氧化镁质量的1.3%~1.8%;所述气凝胶为轻烧氧化镁质量的6%以下。The B component includes a modifier and aerogel; the modifier is one of citric acid, tartaric acid and sodium malate, or a mixture of citric acid and tartaric acid, and the citric acid is light-burned magnesium oxide quality 0.7%~0.8% of the tartaric acid and the sodium malate are 1.3%~1.8% of the quality of light-burned magnesia; and the aerogel is less than 6% of the quality of light-burned magnesia.

进一步的,所述气凝胶采用二氧化硅气凝胶。Further, the aerogel adopts silica aerogel.

进一步的,所述柠檬酸的含量为轻烧氧化镁质量的0.75%,所述酒石酸和所述苹果酸钠的含量均为轻烧氧化镁质量的1.5%。Further, the content of the citric acid is 0.75% of the quality of the light-burned magnesium oxide, and the content of the tartaric acid and the sodium malate are both 1.5% of the quality of the light-burned magnesium oxide.

进一步的,所述轻烧氧化镁中所述活性氧化镁的含量为57.8%。Further, the content of the active magnesium oxide in the light-burned magnesium oxide is 57.8%.

相对于现有技术,本发明具有以下优势:Compared with the prior art, the present invention has the following advantages:

本发明研究的材料是以硫氧镁胶凝材料为主要的原料,之后加入二氧化硅气凝胶以形成硫氧镁复合胶凝材料,同时分别加入不同的改性剂进行性能改变,该复合材料在恒定的温度、湿度条件下会拥有轻质、绝热保温和低导热效率等性能特点。The material studied in the present invention takes magnesium oxysulfide gelling material as the main raw material, and then adds silica aerogel to form magnesium oxysulfide composite gelling material, and simultaneously adds different modifiers to change the properties. The material will have performance characteristics such as light weight, thermal insulation and low thermal conductivity under constant temperature and humidity conditions.

此外,通过掺入二氧化硅气凝胶,可实现对硫氧镁胶凝材料保温性能的提升;二氧化硅气凝胶的掺入,可实现对硫氧镁胶凝材料保温性能的提升,同时,通过设置合理定量的二氧化硅气凝胶的掺入量,使复合材料的抗折强度、抗压强度和耐水性能够在一定程度上保持硫氧镁胶凝材料的性能,因而可为硫氧镁材料保温性能的提升提供很好的基础。In addition, by incorporating silica aerogel, the thermal insulation performance of magnesium oxysulfide cementitious materials can be improved; the incorporation of silica aerogel can improve the thermal insulation performance of magnesium oxysulfide cementitious materials. At the same time, by setting a reasonable and quantitative amount of silica aerogel, the flexural strength, compressive strength and water resistance of the composite material can maintain the performance of the magnesium oxysulfide cementitious material to a certain extent, so it can be used for The improvement of thermal insulation performance of magnesium oxysulfide material provides a good foundation.

本发明的另一目的在于提出一种制备方法,该方法用于本发明的采用二氧化硅气凝胶的硫氧镁胶凝材料的制备,并包括如下步骤:Another object of the present invention is to propose a preparation method, which is used for the preparation of the magnesium oxysulfide cementitious material using silica aerogel of the present invention, and comprises the following steps:

s1.按照配比将七水硫酸镁和水配制成七水硫酸镁溶液,将改性剂和气凝胶倒入该七水硫酸镁溶液中充分搅拌生成混合溶液;s1. According to proportioning, magnesium sulfate heptahydrate and water are mixed into magnesium sulfate heptahydrate solution, and modifier and aerogel are poured into this magnesium sulfate heptahydrate solution and fully stirred to generate mixed solution;

s2.将配比要求的轻烧氧化镁加入所述混合溶液中,充分搅拌形成粘稠度均匀的料浆;s2. Add the light-burned magnesium oxide required by the ratio into the mixed solution, and fully stir to form a slurry with uniform viscosity;

s3.将所述料浆注入涂有脱模剂的模具中,除去所述料浆中的气泡,在温度20 ℃-30 ℃、湿度60 %-70 %的环境中固化反应22~26小时后脱模,获得半成品;s3. inject the slurry into a mold coated with a release agent, remove air bubbles in the slurry, and cure the slurry in an environment with a temperature of 20° C.-30° C. and a humidity of 60%-70% for 22 to 26 hours. Demoulding to obtain semi-finished products;

s4.将所述半成品在温度为20 ℃-30 ℃,湿度为60 %-70 %的环境中养护7天后获得成品。s4. The finished product is obtained after curing the semi-finished product in an environment with a temperature of 20°C-30°C and a humidity of 60%-70% for 7 days.

进一步的,所述模具采用铸铁模具,所述脱模剂为石蜡或机油。Further, the mold is a cast iron mold, and the mold release agent is paraffin or oil.

进一步的,在步骤s3中,通过震动除去所述料浆中的气泡,且对模具中的料浆表面进行刮平及辊压。Further, in step s3, the air bubbles in the slurry are removed by shaking, and the surface of the slurry in the mold is scraped and rolled.

进一步的,在步骤s3中,固化反应的环境温度为25℃,湿度为65%,反应时间为24小时;在步骤s5中,养护的环境温度为25℃,湿度为65%。Further, in step s3, the ambient temperature of the curing reaction is 25°C, the humidity is 65%, and the reaction time is 24 hours; in step s5, the ambient temperature for curing is 25°C, and the humidity is 65%.

进一步的,所述轻烧氧化镁采用轻烧氧化镁粉末。Further, the light-burned magnesia powder is light-burned magnesia powder.

相对于现有技术,本发明具有以下优势:Compared with the prior art, the present invention has the following advantages:

本发明采用上述的制备方法,不仅便于在建造施工中的操作实施,且均可生成力学性能和保温性能优良的硫氧镁胶凝材料。将制备的硫氧镁胶凝材料用于隔墙体或插装式建筑中,可实现对硫氧镁胶凝材料保温性能的提升,能够充分利用硫氧镁胶凝材料力学强度高、耐水性好及使用寿命长等特点;从而提升墙体保温以及建筑的性能,有着很好的经济意义和社会意义。The present invention adopts the above-mentioned preparation method, which is not only convenient for operation and implementation in construction, but also can generate magnesium oxysulfide cementitious materials with excellent mechanical properties and thermal insulation properties. Using the prepared magnesium oxysulfide cementitious material in partition walls or plug-in buildings can improve the thermal insulation performance of the magnesium oxysulfide cementitious material, and can make full use of the high mechanical strength and water resistance of the magnesium oxysulfide cementitious material. It has the characteristics of good performance and long service life; thereby improving the performance of wall insulation and building, it has good economic and social significance.

此外,本发明的还提出了一种建筑物构件,该建筑物构件采用了本发明的采用二氧化硅气凝胶的硫氧镁胶凝材料,并经上述的制备方法制备而成。本发明的建筑物构件,具备上述二氧化硅气凝胶的硫氧镁胶凝材料所具有的技术优势。In addition, the present invention also proposes a building component, which adopts the magnesium oxysulfide cementitious material of the present invention using silica aerogel, and is prepared by the above-mentioned preparation method. The building component of the present invention has the technical advantages of the above-mentioned magnesium oxysulfide cementitious material of silica aerogel.

附图说明Description of drawings

构成本发明的一部分的附图,是用来提供对本发明的进一步理解,本发明的示意性实施例及其说明是用于解释本发明,其中涉及到的前后、上下等方位词语仅用于表示相对的位置关系,均不构成对本发明的不当限定。在附图中:The accompanying drawings that form a part of the present invention are used to provide a further understanding of the present invention, the schematic embodiments of the present invention and their descriptions are used to explain the present invention, and the azimuth words such as front and rear, upper and lower, etc. involved are only used to indicate The relative positional relationship does not constitute an improper limitation of the present invention. In the attached image:

图1为本发明实施例二所述的采用二氧化硅气凝胶的硫氧镁胶凝的制备方法的制备流程图;Fig. 1 is the preparation flow chart of the preparation method of the magnesium oxysulfide gelation using silica aerogel according to the second embodiment of the present invention;

图2为本发明实施例二所述的柠檬酸改性硫氧镁胶凝材料电镜扫描图;Fig. 2 is the electron microscope scanning diagram of the citric acid-modified magnesium oxysulfide cementitious material described in Example 2 of the present invention;

图3为本发明实施例二所述的酒石酸改性硫氧镁胶凝材料电镜扫描图;Fig. 3 is the scanning electron microscope view of the tartaric acid-modified magnesium oxysulfide cementitious material described in the second embodiment of the present invention;

图4为本发明实施例二所述的二氧化硅气凝胶的硫氧镁胶凝的复合材料电镜扫描图。FIG. 4 is a scanning electron microscope view of the magnesium oxysulfide gelled composite material of the silica aerogel according to the second embodiment of the present invention.

具体实施方式Detailed ways

需要说明的是,在不冲突的情况下,本发明中的实施例及实施例中的特征可以相互组合。It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

下面将参考附图并结合实施例来详细说明本发明。The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

实施例一Example 1

本实施例涉及一种采用二氧化硅气凝胶的硫氧镁胶凝材料,有助于改善硫氧镁胶凝建材的力学性能和保温性能。该采用二氧化硅气凝胶的硫氧镁胶凝包括A组分和B组分,其中:This embodiment relates to a magnesium oxysulfide cementitious material using silica aerogel, which helps to improve the mechanical properties and thermal insulation properties of the magnesium oxysulfide cementitious building material. The magnesium oxysulfide gel using silica aerogel includes A component and B component, wherein:

A组分按摩尔比配比,包括1份七水硫酸镁、8~12份轻烧氧化镁和15~22份水;并且,轻烧氧化镁中活性氧化镁的含量在55%~65%。The molar ratio of component A includes 1 part of magnesium sulfate heptahydrate, 8-12 parts of light-burned magnesium oxide and 15-22 parts of water; and the content of active magnesium oxide in the light-burned magnesium oxide is 55% to 65% .

B组分包括改性剂和气凝胶。其中,改性剂为柠檬酸、酒石酸和苹果酸钠中的一种,或柠檬酸和酒石酸的混合物;各类改性剂的用量为:柠檬酸为轻烧氧化镁质量的0.7%~0.8%,酒石酸和苹果酸钠均为轻烧氧化镁质量的1.3%~1.8%。气凝胶的用量为轻烧氧化镁质量的6%以下。The B component includes modifiers and aerogels. Among them, the modifier is one of citric acid, tartaric acid and sodium malate, or a mixture of citric acid and tartaric acid; the dosage of various modifiers is: citric acid is 0.7%~0.8% of the mass of light-burned magnesium oxide , tartaric acid and sodium malate are 1.3%~1.8% of the mass of light-burned magnesium oxide. The dosage of aerogel is less than 6% of the mass of light-burned magnesium oxide.

基于上述的总体配比原则,气凝胶优选采用二氧化硅气凝胶。各改性剂的优选用量为:柠檬酸的含量为轻烧氧化镁质量的0.75%,酒石酸和苹果酸钠的含量均为轻烧氧化镁质量的1.5%。同时,轻烧氧化镁中活性氧化镁的含量优选为57.8%左右。Based on the above-mentioned overall proportioning principle, the aerogel preferably adopts silica aerogel. The preferred dosage of each modifier is: the content of citric acid is 0.75% of the mass of light-burned magnesia, and the content of tartaric acid and sodium malate are both 1.5% of the mass of light-burned magnesia. Meanwhile, the content of active magnesia in the light-burned magnesia is preferably about 57.8%.

上述气凝胶硫氧镁胶凝材料制备中,二氧化硅气凝胶可从气凝胶生产厂家获得。气凝胶的导热系数低,保温性能好,密度低,材料轻质化,节约能源消耗。In the preparation of the above-mentioned aerogel magnesium oxysulfide gelling material, the silica aerogel can be obtained from the aerogel manufacturer. Aerogel has low thermal conductivity, good thermal insulation performance, low density, lightweight material, and energy saving.

作为优选地设置,上述硫氧镁胶凝材料的各制备组分中,本实施例的轻烧氧化镁采用纯度为80%-85%,活性为55%-65%,细度为200目的市售产品即可;例如,采用纯度为83%、活性为60%的200目市售轻烧氧化镁产品。本实施例的七水硫酸镁和水制备七水硫酸镁溶液时,优选采用纯度为95%-99%的七水硫酸镁。As a preferred setting, among the preparation components of the above-mentioned magnesium oxysulfide cementitious material, the light-burned magnesium oxide in this embodiment adopts a purity of 80%-85%, an activity of 55%-65%, and a fineness of 200 mesh. A commercially available product can be used; for example, a commercially available 200-mesh light-burned magnesia product with a purity of 83% and an activity of 60% is used. When the magnesium sulfate heptahydrate and water of the present embodiment prepare the magnesium sulfate heptahydrate solution, preferably the magnesium sulfate heptahydrate with a purity of 95%-99% is used.

在制备硫氧镁胶凝时,改性剂的选用,可分别采用酒石酸、柠檬酸和苹果酸钠中的一种,或者采用酒石酸与柠檬酸这两种改性剂的混合物。同时,作为本实施例的改性剂的一种组分组成优选示例,所述改性剂中,柠檬酸的含量为轻烧氧化镁粉质量的0.75%,酒石酸的含量为轻烧氧化镁粉质量的1.5%,苹果酸钠的含量为轻烧氧化镁粉质量的1.5%。而在改性剂的具体制备时,通过搅拌混合的方式,将酒石酸、柠檬酸、苹果酸钠和柠檬酸与酒石酸的混合物分别与七水硫酸镁溶液充分混匀即可。In the preparation of magnesium oxysulfide gelation, the selection of the modifier can be one of tartaric acid, citric acid and sodium malate, or a mixture of the two modifiers of tartaric acid and citric acid. At the same time, as a preferred example of the composition of the modifier of the present embodiment, in the modifier, the content of citric acid is 0.75% of the quality of the light-burned magnesium oxide powder, and the content of tartaric acid is the light-burned magnesium oxide powder. 1.5% of the mass, and the content of sodium malate is 1.5% of the mass of the light-burned magnesia powder. In the specific preparation of the modifier, the mixture of tartaric acid, citric acid, sodium malate and citric acid and tartaric acid can be fully mixed with the magnesium sulfate heptahydrate solution by stirring and mixing.

本实施例中,二氧化硅气凝胶的含量为轻烧氧化镁粉质量的6%以下,例如可以是1%、2%、4%、6%。在气凝胶的具体制备时,通过搅拌混合的方式,将二氧化硅气凝胶先与改性剂和七水硫酸镁溶液充分混匀即得。In this embodiment, the content of the silica aerogel is less than 6% of the mass of the light-burned magnesia powder, for example, it can be 1%, 2%, 4%, or 6%. In the specific preparation of the aerogel, the silica aerogel is fully mixed with the modifier and the magnesium sulfate heptahydrate solution by stirring and mixing.

需要说明的是,本实施例的硫氧镁胶凝材料中的上述各组分的具体含量可以在实际应用中适应性选择,其满足整体重量配比构成的要求便可。It should be noted that, the specific contents of the above-mentioned components in the magnesium oxysulfide cementitious material of the present embodiment can be adaptively selected in practical applications, as long as they meet the requirements of the overall weight ratio composition.

本实施例的二氧化硅气凝胶的硫氧镁胶凝材料,以硫氧镁胶凝材料为主要的原料,之后加入二氧化硅气凝胶以形成硫氧镁复合胶凝材料,同时分别加入不同的改性剂进行性能改变,该复合材料在恒定的温度、湿度条件下会拥有轻质、绝热保温和低导热效率等性能特点。二氧化硅气凝胶的掺入,可实现对硫氧镁胶凝材料保温性能的提升,同时,通过设置合理定量的二氧化硅气凝胶的掺入量,使复合材料的抗折强度、抗压强度和耐水性能够在一定程度上保持硫氧镁胶凝材料的性能,因而可为硫氧镁材料保温性能的提升提供很好的基础。The magnesium oxysulfide cementitious material of the silica aerogel of this embodiment uses the magnesium oxysulfide cementitious material as the main raw material, and then adds silica aerogel to form the magnesium oxysulfide composite cementitious material. By adding different modifiers to change the properties, the composite material will have the performance characteristics of light weight, thermal insulation and low thermal conductivity under constant temperature and humidity conditions. The incorporation of silica aerogel can improve the thermal insulation performance of magnesium oxysulfide cementitious materials, and at the same time, by setting a reasonable and quantitative amount of silica aerogel, the flexural strength, The compressive strength and water resistance can maintain the properties of the magnesium oxysulfide cementitious material to a certain extent, so it can provide a good foundation for the improvement of the thermal insulation performance of the magnesium oxysulfide material.

实施例二Embodiment 2

本实施例涉及一种采用二氧化硅气凝胶的硫氧镁胶凝材料的制备方法及建筑物构件,便于在建造施工中的操作实施,且均可生成力学性能和保温性能优良的硫氧镁胶凝材料。The present embodiment relates to a preparation method of a magnesium oxysulfide cementitious material using silica aerogel and a building component, which are convenient for operation and implementation in construction, and can both generate oxysulfide with excellent mechanical properties and thermal insulation properties. Magnesium cementitious material.

该方法用于实施例一所提供的采用二氧化硅气凝胶的硫氧镁胶凝材料的制备,并包括如下步骤:The method is used for the preparation of the magnesium oxysulfide gelling material using silica aerogel provided in Example 1, and includes the following steps:

s1.按照配比将七水硫酸镁和水配制成七水硫酸镁溶液,将改性剂和气凝胶倒入该七水硫酸镁溶液中充分搅拌生成混合溶液;s1. According to proportioning, magnesium sulfate heptahydrate and water are mixed into magnesium sulfate heptahydrate solution, and modifier and aerogel are poured into this magnesium sulfate heptahydrate solution and fully stirred to generate mixed solution;

s2.将配比要求的轻烧氧化镁加入混合溶液中,充分搅拌形成粘稠度均匀的料浆;s2. Add the light-burned magnesium oxide required by the ratio into the mixed solution, and fully stir to form a slurry with uniform viscosity;

s3.将料浆注入涂有脱模剂的模具中,除去料浆中的气泡,在温度20℃-30℃、湿度60%-70%的环境中固化反应22~26小时后脱模,获得半成品;s3. Inject the slurry into the mold coated with the release agent, remove the bubbles in the slurry, cure and react for 22 to 26 hours in an environment with a temperature of 20°C-30°C and a humidity of 60%-70%, and then release the mold to obtain semi-finished products;

s4.将半成品在温度为20℃-30℃,湿度为60%-70%的环境中养护7天后获得成品。s4. After curing the semi-finished product for 7 days in an environment with a temperature of 20°C-30°C and a humidity of 60%-70%, the finished product is obtained.

基于上述的总体制备流程要求,在硫氧镁胶凝的制备时,可采用如下的具体操作形式。Based on the above-mentioned overall preparation process requirements, the following specific operation forms can be used in the preparation of magnesium oxysulfide gel.

首先,制备好模具,并在模具上涂一层脱模剂。例如,使用尺寸为40mm×40mm×160mm的三联铸铁模具;脱模剂可使用石蜡或机油。First, the mold is prepared and a layer of release agent is applied to the mold. For example, use a triple cast iron mold with a size of 40mm x 40mm x 160mm; the release agent can be paraffin or oil.

之后,备好所需的各类组分原料;其中,轻烧氧化镁优选采用轻烧氧化镁粉末;并采用氧化镁活性水合检测法检测轻烧氧化镁的活性,保证轻烧氧化镁中活性氧化镁的含量符合要求。分别称量活性氧化镁、七水硫酸镁、柠檬酸、酒石酸、苹果酸钠与气凝胶,并称量相应配比的水。After that, prepare the required raw materials of various components; wherein, the light-burned magnesium oxide is preferably light-burned magnesium oxide powder; and the magnesium oxide active hydration detection method is used to detect the activity of the light-burned magnesium oxide to ensure the activity of the light-burned magnesium oxide. The content of magnesium oxide meets the requirements. Weigh active magnesium oxide, magnesium sulfate heptahydrate, citric acid, tartaric acid, sodium malate and aerogel respectively, and weigh the corresponding proportion of water.

此后进行溶解操作。将七水硫酸镁在室温条件下充分搅拌溶解于水中形成硫酸镁溶液(即七水硫酸镁溶液),首先将一定的改性剂倒入硫酸镁溶液中慢速充分搅拌,形成混合溶液并进行力学等性能测定,之后加入二氧化硅气凝胶并进行导热性能的测定,以确保材料符合建筑物所需的力学和保温性能要求。After that, the dissolving operation is performed. The magnesium sulfate heptahydrate is fully stirred and dissolved in water at room temperature to form a magnesium sulfate solution (that is, a magnesium sulfate heptahydrate solution). First, a certain modifier is poured into the magnesium sulfate solution and stirred at a slow speed to form a mixed solution. Mechanical and other properties are measured, and then silica aerogel is added and thermal conductivity is measured to ensure that the material meets the mechanical and thermal performance requirements required by the building.

根据硫酸镁溶液中加入的气凝胶和改性剂种类的不同,以及加入气凝胶量的不同,可以生成多种类型的混合溶液。例如,改性剂使用柠檬酸、酒石酸、苹果酸钠或者柠檬酸和酒石酸的混合物,加入气凝胶的量可以取轻烧氧化镁粉质量的1%、2%、6%等。这样,可形成多种不同的混合溶液。According to the different types of aerogels and modifiers added to the magnesium sulfate solution, as well as the different amounts of aerogels added, various types of mixed solutions can be generated. For example, the modifier uses citric acid, tartaric acid, sodium malate or a mixture of citric acid and tartaric acid, and the amount of the added aerogel can be 1%, 2%, 6%, etc. of the mass of the light-burned magnesium oxide powder. In this way, many different mixed solutions can be formed.

譬如,将称量一定质量的轻烧氧化镁粉末分别倒入由硫酸镁溶液与柠檬酸、酒石酸或苹果酸钠等不同改性剂混合生成的混合溶液中,室温下用搅拌器进性充分搅拌分别形成A、B、C三种料浆(下述实施例1中的三组实施例产品即采用该三种料浆)。将称量一定质量的轻烧氧化镁粉末分别倒入柠檬酸、以及柠檬酸和酒石酸的混合物的溶液中,并且分别加入含有二氧化硅气凝胶的混合溶液中,在室温下用搅拌器进性充分搅拌分别形成D、E三种料浆(下述实施例2中的两组组实施例产品即采用该三种料浆)。。上述的料浆需要充分搅拌至粘稠度均匀,不同的料浆在力学性能和保温性能上具有一定的差别,可根据建筑构架的性能需要灵活调整和选用。For example, a certain mass of light-burned magnesium oxide powder is poured into the mixed solution generated by mixing magnesium sulfate solution with different modifiers such as citric acid, tartaric acid or sodium malate, and the mixture is fully stirred with a stirrer at room temperature. Three kinds of slurries A, B, and C were respectively formed (the three groups of example products in the following Example 1 adopted these three kinds of slurries). Pour a certain mass of light-burned magnesium oxide powder into a solution of citric acid and a mixture of citric acid and tartaric acid, respectively, and add them to the mixed solution containing silica aerogel, and stir them at room temperature with a stirrer. The three types of slurries, D and E, were formed by fully stirring them (the two groups of example products in the following Example 2 used these three types of slurries). . The above-mentioned slurries need to be fully stirred until the viscosity is uniform. Different slurries have certain differences in mechanical properties and thermal insulation properties, and can be flexibly adjusted and selected according to the performance needs of the building frame.

完成料浆的制备后,将其注入模具,等待24小时固化成型进行脱模,获得半成品;之后放入恒温恒湿的养护箱分别进行7天、28天的养护,即可后获得成品。当模具时设置在建筑构架上时,该成品即形成建筑物的建筑物构件。After completing the preparation of the slurry, inject it into the mold, wait for 24 hours for curing and molding to demould, and obtain a semi-finished product; then put it into a constant temperature and humidity curing box for 7 days and 28 days of curing, and then the finished product can be obtained. When the mould is placed on the building frame, the finished product forms the building element of the building.

需要指出的是,上述的料浆在注模后,应通过震动等方式除去料浆中的气泡,且对模具中的料浆表面进行刮平及辊压。It should be pointed out that after the above-mentioned slurry is injected, the air bubbles in the slurry should be removed by means of vibration, etc., and the surface of the slurry in the mold should be scraped and rolled.

同时,优选地,固化反应的环境温度为25℃,湿度为65%,反应时间为24小时;在步骤s5中,养护的环境温度为25℃,湿度为65%。Meanwhile, preferably, the ambient temperature of the curing reaction is 25°C, the humidity is 65%, and the reaction time is 24 hours; in step s5, the ambient temperature for curing is 25°C, and the humidity is 65%.

通过上述的制备方法,可获得具有良好力学性能和保温性能的硫氧镁胶凝。上述的制备方法,不仅便于在建造施工中的操作实施,且均可生成力学性能和保温性能优良的硫氧镁胶凝材料。将制备的硫氧镁胶凝材料用于隔墙体或插装式建筑中,可实现对硫氧镁胶凝材料保温性能的提升,能够充分利用硫氧镁胶凝材料力学强度高、耐水性好及使用寿命长等特点;从而提升墙体保温以及建筑的性能,有着很好的经济意义和社会意义。Through the above preparation method, magnesium oxysulfide gel with good mechanical properties and thermal insulation properties can be obtained. The above preparation method is not only convenient for operation and implementation in construction, but also can generate magnesium oxysulfide cementitious materials with excellent mechanical properties and thermal insulation properties. Using the prepared magnesium oxysulfide cementitious material in partition walls or plug-in buildings can improve the thermal insulation performance of the magnesium oxysulfide cementitious material, and can make full use of the high mechanical strength and water resistance of the magnesium oxysulfide cementitious material. It has the characteristics of good performance and long service life; thereby improving the performance of wall insulation and building, it has good economic and social significance.

此外,本发明的还提出了一种建筑物构件,该建筑物构件采用了本发明的采用二氧化硅气凝胶的硫氧镁胶凝,并经上述的制备方法制备而成。本发明的建筑物构件,具备上述二氧化硅气凝胶的硫氧镁胶凝材料所具有的技术优势。In addition, the present invention also proposes a building component, which is prepared by the above-mentioned preparation method using the magnesium oxysulfide gel of the present invention using silica aerogel. The building component of the present invention has the technical advantages of the above-mentioned magnesium oxysulfide cementitious material of silica aerogel.

以下,结合具体实施例和对比例,对本实施例的制备方法做进一步的阐述,并对制成的产品进行相关性能的测试检验。Hereinafter, the preparation method of this embodiment will be further elaborated with reference to specific examples and comparative examples, and the related properties of the manufactured products will be tested and inspected.

[实施例2.1][Example 2.1]

本实施例的硫氧镁胶凝材料,采用如下比例:其中轻烧氧化镁粉、七水硫酸镁、水按摩尔比为10:1:18,所述轻烧氧化镁粉中活性氧化镁的含量为57.8%。改性剂采用柠檬酸、酒石酸和苹果酸钠分别进行,而形成三组实施例产品;其中,柠檬酸的含量为轻烧氧化镁粉质量的0.75%,形成分组1产品;酒石酸的含量为轻烧氧化镁粉质量的1.5%,形成分组2产品;苹果酸钠的含量为轻烧氧化镁粉质量的1.5%,形成分组3产品。The magnesium oxysulfide cementing material of the present embodiment adopts the following ratio: wherein the molar ratio of lightly burned magnesium oxide powder, magnesium sulfate heptahydrate, and water is 10:1:18, and the active magnesium oxide in the lightly burned magnesium oxide powder is 10:1:18. The content is 57.8%. The modifier adopts citric acid, tartaric acid and sodium malate to carry out respectively, and form three groups of embodiment products; wherein, the content of citric acid is 0.75% of the quality of light-burned magnesia powder, forming group 1 product; the content of tartaric acid is light 1.5% of the mass of the calcined magnesia powder forms group 2 products; the content of sodium malate is 1.5% of the mass of the light calcined magnesia powder to form group 3 products.

本实施例可参照玻纤镁质胶凝材料波瓦及脊瓦(JC/T747-2002)作为检测标准,以养护28天后测抗折强度、抗压强度、导热系数,浸水7天后测软化系数,分别进行三组实施例产品的测试。In this example, the glass fiber magnesia cementitious material wave tile and ridge tile (JC/T747-2002) can be used as the testing standard, and the flexural strength, compressive strength, and thermal conductivity are measured after curing for 28 days, and the softening coefficient is measured after immersion in water for 7 days. , respectively carry out the test of three groups of embodiment products.

按前述制备步骤即得到本实施例的硫氧镁胶凝材料,且其中固化反应的环境温度为25℃、湿度为65%、反应时间为24小时;养护的环境温度为25℃、湿度为65%,其检测结果如下表1所示。According to the aforementioned preparation steps, the magnesium oxysulfide cementitious material of the present embodiment is obtained, and the ambient temperature of the curing reaction is 25°C, the humidity is 65%, and the reaction time is 24 hours; the ambient temperature for curing is 25°C, and the humidity is 65°C %, and the test results are shown in Table 1 below.

表1.实施例的检测结果Table 1. Test results of the embodiment

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表1检测结果表明,本发明所采用的这三种改性剂中定量为0.75%柠檬酸和定量为1.5%酒石酸对硫氧镁胶凝材料的强度性能改善程度大。图2、图3分为柠檬酸和酒石酸改性的硫氧镁胶凝材料的电镜扫描图;可以看出,柠檬酸、酒石酸的改性剂对硫氧镁气凝胶复合材料的强度性能产生了显著的影响。The test results in Table 1 show that among the three modifiers used in the present invention, 0.75% citric acid and 1.5% tartaric acid have a large degree of improvement in the strength properties of the magnesium oxysulfide cementitious material. Fig. 2 and Fig. 3 are the scanning electron microscope images of the citric acid and tartaric acid-modified magnesium oxysulfide cementitious materials; it can be seen that the modifiers of citric acid and tartaric acid have an effect on the strength properties of the magnesium oxysulfide aerogel composites. significant impact.

[实施例2.2][Example 2.2]

本实施例的硫氧镁胶凝材料,采用如下比例:其中轻烧氧化镁粉、七水硫酸镁、水按摩尔比为10:1:18,所述轻烧氧化镁粉中活性氧化镁的含量为57.8%。在本实施例中,所用改性剂分别为柠檬酸、以及柠檬酸和酒石酸的混合物而形成两组实施例产品;采用柠檬酸改性剂的为分组1产品,采用柠檬酸和酒石酸的混合物作为改性剂的为分组2产品。同时,按上述的制备步骤掺入定量的气凝胶得到本实施例的硫氧镁气凝胶复合材料。其中,柠檬酸的含量为轻烧氧化镁粉质量的0.75%,酒石酸的含量为轻烧氧化镁粉质量的1.5%,气凝胶的含量为轻烧氧化镁粉质量的1%。The magnesium oxysulfide cementing material of the present embodiment adopts the following ratio: wherein the molar ratio of lightly burned magnesium oxide powder, magnesium sulfate heptahydrate, and water is 10:1:18, and the active magnesium oxide in the lightly burned magnesium oxide powder is 10:1:18. The content is 57.8%. In this embodiment, the modifiers used are respectively citric acid and a mixture of citric acid and tartaric acid to form two groups of embodiment products; those using a citric acid modifier are group 1 products, and a mixture of citric acid and tartaric acid is used as Modifiers are group 2 products. At the same time, according to the above preparation steps, a quantitative amount of aerogel is added to obtain the magnesium oxysulfide aerogel composite material of this embodiment. Wherein, the content of citric acid is 0.75% of the mass of light-burned magnesia powder, the content of tartaric acid is 1.5% of the mass of light-burned magnesia powder, and the content of aerogel is 1% of the mass of light-burned magnesia powder.

本实施例同样参照玻纤镁质胶凝材料波瓦及脊瓦(JC/T747-2002)作为检测标准,以养护28天后测抗折强度、抗压强度、导热系数,浸水7天后测软化系数。对上述两组实施例产品进行检测,其检测结果如下表2所示。This example also refers to the glass fiber magnesia cementitious material wave tile and ridge tile (JC/T747-2002) as the detection standard, and measures the flexural strength, compressive strength and thermal conductivity after curing for 28 days, and measures the softening coefficient after immersion in water for 7 days. . The above-mentioned two groups of embodiment products are tested, and the test results are shown in Table 2 below.

表2.实施例的检测结果Table 2. Test results of the embodiment

Figure DEST_PATH_IMAGE002
Figure DEST_PATH_IMAGE002

由表2检测结果表明,本发明中,当二氧化硅气凝胶的掺量相同时,随着加入改性剂种类的增加,其强度性能有所降低,但是其导热系数降低,保温效果增加;图4示出了本实施例的硫氧镁气凝胶复合材料的电镜扫描图。有上述实验可知,本发明的硫氧镁胶凝材料,在加入多种改性剂的基础上掺入不同定量的气凝胶,可有效增强硫氧镁胶凝材料的保温性能。The test results in Table 2 show that in the present invention, when the content of silica aerogel is the same, with the increase of the type of modifier added, its strength performance is reduced, but its thermal conductivity is reduced, and the thermal insulation effect is increased. ; Figure 4 shows the electron microscope scanning diagram of the magnesium oxysulfide aerogel composite material of this embodiment. It can be seen from the above experiments that the magnesium oxysulfide cementitious material of the present invention can effectively enhance the thermal insulation performance of the magnesium oxysulfide cementitious material by adding different amounts of aerogels on the basis of adding various modifiers.

[对比例][Comparative ratio]

在实施例2.2的基础上,本对比例是在改性剂为柠檬酸和酒石酸的混合物的基础上,分别掺入1%与2%的二氧化硅气凝胶,以完成两组硫氧镁胶凝材料产品的制备;采用1%二氧化硅气凝胶的为分组1产品,采用2%二氧化硅气凝胶的为分组2产品。该通过掺入不同定量的二氧化硅气凝胶的硫氧镁胶凝材料采用如下原料材料制成:轻烧氧化镁粉、七水硫酸镁、水、柠檬酸、酒石酸、气凝胶,其中,轻烧氧化镁粉、七水硫酸镁、水按摩尔比为10:1:18,所述轻烧氧化镁粉中活性氧化镁的含量为57.8%,所述柠檬酸的含量为轻烧氧化镁粉质量的0.75%,酒石酸的含量为轻烧氧化镁粉质量的1.5%,二氧化硅气凝胶的掺入量分别为轻烧氧化镁粉质量的1%与2%。On the basis of Example 2.2, this comparative example is based on the modification agent being a mixture of citric acid and tartaric acid, adding 1% and 2% of silica aerogel respectively to complete two groups of magnesium oxysulfide Preparation of gelling material products; those using 1% silica aerogel are group 1 products, and those using 2% silica aerogel are group 2 products. The magnesium oxysulfate cementitious material incorporating different amounts of silica aerogel is made from the following raw materials: light-burned magnesium oxide powder, magnesium sulfate heptahydrate, water, citric acid, tartaric acid, and aerogel, wherein , the molar ratio of light-burned magnesium oxide powder, magnesium sulfate heptahydrate, and water is 10:1:18, and the content of active magnesium oxide in the light-burned magnesium oxide powder is 57.8%, and the content of the citric acid is light-burned oxidation The mass of magnesium powder is 0.75%, the content of tartaric acid is 1.5% of the mass of the light-burned magnesium oxide powder, and the dosage of silica aerogel is 1% and 2% of the mass of the light-burned magnesium oxide powder, respectively.

该对比例中,掺入不同定量的二氧化硅气凝胶的硫氧镁胶凝材料在制备时,其具体制备方法主要包括:In this comparative example, when preparing the magnesium oxysulfide cementitious materials incorporating different amounts of silica aerogel, the specific preparation methods mainly include:

首先在模具上涂一层脱模剂,然后取硫酸镁溶液和改性剂,并将改性剂倒入硫酸镁溶液中慢速充分搅拌,形成混合溶液。接着,将轻烧氧化镁粉分别与不同的混合溶液中充分搅拌至形成粘稠度均匀的F、G两组料浆;两组料浆中二氧化硅气凝胶的含量不同。First, coat a layer of release agent on the mold, then take the magnesium sulfate solution and modifier, and pour the modifier into the magnesium sulfate solution and stir at a slow speed to form a mixed solution. Next, the light-burned magnesium oxide powder is fully stirred with different mixed solutions to form two groups of slurries F and G with uniform viscosity; the two groups of slurries have different content of silica aerogel.

然后,分别将料浆F、G注入模具中,除去气泡,在温度为25℃、湿度为65%的环境中固化反应24小时后脱模获得半成品;最后,将脱模后的半成品在温度为25℃、湿度为65%的环境中养护7天和28天后制得成品。Then, inject the slurries F and G into the mold respectively to remove air bubbles, and cure and react for 24 hours in an environment with a temperature of 25°C and a humidity of 65%, and then demould to obtain a semi-finished product; The finished product was obtained after curing for 7 days and 28 days in an environment of 25°C and a humidity of 65%.

其中,改性剂的制备与前述相同,上述脱模剂同样可为石蜡或机油,并分别将料浆F、G注入模具中后,仍选择震动除去气泡,并刮平且轻微辊压。Wherein, the preparation of the modifier is the same as the above, and the above-mentioned mold release agent can also be paraffin or engine oil, and after injecting the slurry F and G into the mold respectively, it is still selected to vibrate to remove air bubbles, and is scraped and rolled slightly.

本发明的对比测试仍以JC/T747-2002为检测标准,以抗折强度、抗压强度、软化系数和导热系数为指标,对上述对比例所制得的硫氧镁气凝胶复合材料进行检测,其检测结果如下表3所示。In the comparative test of the present invention, JC/T747-2002 is still used as the detection standard, and the flexural strength, compressive strength, softening coefficient and thermal conductivity are used as indicators. The test results are shown in Table 3 below.

表3.两组对比例产品的检测结果Table 3. Test results of two groups of comparative products

Figure DEST_PATH_IMAGE003
Figure DEST_PATH_IMAGE003

由以上表的比较可以看出,本实施例的添加1%的二氧化硅气凝胶的硫氧镁胶凝材料与添加2%二氧化硅气凝胶的硫氧镁胶凝材料相比,其抗折强度、抗压强度和耐水性有所降低,但是随着二氧化硅气凝胶的质量的增加,产品的导热系数在降低,保温效果在增加;因此,不可过多掺入二氧化硅气凝胶,在具体应用时应考虑到导热系数与力学强度之间的潜在平衡关系。As can be seen from the comparison of the above table, the magnesium oxysulfide cementitious material added with 1% of silica aerogel of the present embodiment is compared with the magnesium oxysulfide cementitious material added with 2% of silica aerogel, Its flexural strength, compressive strength and water resistance have decreased, but with the increase of the quality of silica aerogel, the thermal conductivity of the product is decreased, and the thermal insulation effect is increased; therefore, do not mix too much dioxide For silicone aerogels, the potential balance between thermal conductivity and mechanical strength should be considered in specific applications.

最后,应当指出的是,当按摩尔比使用1份七水硫酸镁时,轻烧氧化镁可使用8、9、10、12等不同的份数,水可采用15、17、19、22等不同的份数;轻烧氧化镁粉、七水硫酸镁、水三者按摩尔比的比值在10:1:18左右,均可达到本发明改善产品力学和保温性能的要求。同样地,轻烧氧化镁中活性氧化镁的含量在55%~65%之间时,即可满足改善产品性能的目的要求;含量可以是55%、58%、62%、65%,或者上述实施例中采用的57.8%。柠檬酸为轻烧氧化镁质量的0.7%~0.8%范围内,酒石酸和苹果酸钠均为轻烧氧化镁质量的1.3%~1.8%范围内,即可满足改善产品性能的目的要求。Finally, it should be noted that when 1 part of magnesium sulfate heptahydrate is used in a molar ratio, different parts such as 8, 9, 10, 12, etc. can be used for lightly burned magnesia, and 15, 17, 19, 22, etc., are used for water Different parts; the molar ratio of light-burned magnesium oxide powder, magnesium sulfate heptahydrate, and water is about 10:1:18, all of which can meet the requirements of the present invention to improve product mechanics and thermal insulation performance. Similarly, when the content of active magnesium oxide in light-burned magnesium oxide is between 55% and 65%, the purpose of improving product performance can be satisfied; the content can be 55%, 58%, 62%, 65%, or the above 57.8% used in the examples. Citric acid is within the range of 0.7%~0.8% of the mass of light-burned magnesium oxide, and tartaric acid and sodium malate are within the range of 1.3%~1.8% of the mass of light-burned magnesium oxide, which can meet the purpose of improving product performance.

综合上述,本实施例的制备方法及其制成的建筑物构件,为硫氧镁胶凝材料,通过掺入适合数量的二氧化硅气凝胶,可使产品不仅具有较高的保温性能,同时,还兼顾高强度的性能。当将本实施例的制备方法制成的硫氧镁气凝胶复合材料作为建筑物构件,用于建筑隔墙体及插装式建筑中时,可有效提升墙体的保温性能,且能够保持墙体其他性能基本保持不变。这样一来,在充分利用硫氧镁胶凝材料力学强度高、耐水性好及使用寿命长等特点的同时,可提升墙体以及建筑的性能,也能够实现气凝胶良好的保温作用,而有着很好的应用前景。To sum up the above, the preparation method of this embodiment and the building components made thereof are magnesium oxysulfate cementitious materials, and by incorporating a suitable amount of silica aerogel, the product can not only have high thermal insulation performance, but also At the same time, it also takes into account the performance of high strength. When the magnesium oxysulfide aerogel composite material prepared by the preparation method of this embodiment is used as a building component in a building partition wall and a plug-in building, the thermal insulation performance of the wall can be effectively improved, and the Other properties of the wall remain basically unchanged. In this way, while making full use of the characteristics of high mechanical strength, good water resistance and long service life of magnesium oxysulfide cementitious materials, the performance of walls and buildings can be improved, and the good thermal insulation effect of aerogel can also be achieved. Has a good application prospect.

以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (8)

1. The preparation method of the magnesium oxysulfate cementing material adopting the silica aerogel is characterized by comprising a component A and a component B, wherein:
the component A comprises 1 part of magnesium sulfate heptahydrate, 8-12 parts of light burned magnesium oxide and 15-22 parts of water according to the mol ratio, and the content of active magnesium oxide in the light burned magnesium oxide is 55-65%;
the component B comprises a modifier and aerogel; the modifier is citric acid or a mixture of citric acid and tartaric acid, and the aerogel is silicon dioxide aerogel; the citric acid accounts for 0.7-0.8% of the weight of the light-burned magnesia, and the tartaric acid accounts for 1.3-1.8% of the weight of the light-burned magnesia; the mass of the aerogel is 1-2% of that of the light-burned magnesia; and the number of the first and second electrodes,
the preparation method comprises the following steps:
s1. preparing magnesium sulfate heptahydrate solution from magnesium sulfate heptahydrate and water, pouring modifier and aerogel into the magnesium sulfate heptahydrate solution, and stirring to obtain mixed solution;
s2, adding light calcined magnesia with a proportioning requirement into the mixed solution, and fully stirring to form slurry with uniform viscosity;
s3., injecting the slurry into a mold coated with a release agent, removing bubbles in the slurry, and demolding after curing reaction for 22-26 hours at the temperature of 20-30 ℃ and the humidity of 60-70% to obtain a semi-finished product;
s4. curing the semi-finished product in an environment with the temperature of 20-30 ℃ and the humidity of 60-70% for 7 days to obtain the finished product.
2. The method for preparing a magnesium oxysulfate gel material using silica aerogel according to claim 1, characterized in that: the content of the citric acid is 0.75 percent of the weight of the light calcined magnesia, and the content of the tartaric acid is 1.5 percent of the weight of the light calcined magnesia.
3. The method for preparing a magnesium oxysulfate gel material using silica aerogel according to claim 1, characterized in that: the content of the active magnesium oxide in the light-burned magnesium oxide is 57.8%.
4. The method for preparing magnesium oxysulfate gelling material using silica aerogel according to any of claims 1 to 3, characterized in that: the mold is a cast iron mold, and the release agent is paraffin or engine oil.
5. The method for preparing a magnesium oxysulfate gel material using silica aerogel according to claim 4, characterized in that: in step s3, bubbles in the slurry are removed by vibration, and the surface of the slurry in the mold is scraped and rolled.
6. The method for preparing a magnesium oxysulfate gel material using silica aerogel according to claim 4, characterized in that: in step s3, the ambient temperature of the curing reaction is 25 ℃, the humidity is 65%, and the reaction time is 24 hours; in step s5, the ambient temperature for curing was 25 ℃ and the humidity was 65%.
7. The method for preparing a magnesium oxysulfate gel material using silica aerogel according to claim 4, characterized in that: the light-burned magnesia adopts light-burned magnesia powder.
8. A building component, characterized in that it is prepared by the method of any one of claims 1 to 7 for preparing magnesium oxysulfate gel material using silica aerogel.
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