CN114351992B - Composite outer wall construction method for energy-saving building block decoration - Google Patents
Composite outer wall construction method for energy-saving building block decoration Download PDFInfo
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Abstract
The invention discloses a composite outer wall construction method for energy-saving building block decoration, which comprises the following steps: step 1, respectively weighing all components of the energy-saving building block according to parts by weight, and uniformly mixing and stirring; step 2, pouring the energy-saving building block mixed slurry into a prepared mold, and pouring and molding; step 3, demolding the energy-saving building block blank after curing and forming, and curing; step 4, cleaning a base layer of the outer wall, coating a layer of bonding mortar on the surface layer of the base layer, and paving the energy-saving building blocks on the surface of the bonding layer; and 5, coating decorative paint on the surface of the energy-saving building block after the bonding layer is completely dried, thus finishing construction. The scandium silicate coated vitrified microsphere is added to replace the vitrified microsphere as a heat-insulating component, so that the heat insulation performance of the traditional vitrified microsphere is enhanced, and the defects of high water absorption, high shrinkage and low adhesiveness of the traditional vitrified microsphere are overcome.
Description
Technical Field
The invention relates to the field of building construction, in particular to a composite outer wall construction method for energy-saving building block decoration.
Background
With the rapid development of social economy, modern buildings are higher and higher, and the functional comprehensiveness is stronger. The frame and the frame shear structure replace the brick-concrete structure, and wall filling materials are increasingly important. The novel material-external wall composite energy-saving building block which can meet the energy-saving standard and has the heat preservation function makes up the blank of the building market. As a novel energy-saving wall filling and heat-insulating material, in the application of outer wall decoration, concrete blocks are built on the outer wall of the original structure, so that the effects of heat insulation and heat insulation are achieved, and meanwhile, the concave-convex effect of the outer elevation is also highlighted. However, the existing building block decoration wall has insufficient heat insulation performance, so that the heat insulation effect is not ideal, and the energy-saving effect of the building block decoration cannot be highlighted.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention aims to provide a composite outer wall construction method for energy-saving building block decoration.
The aim of the invention is realized by adopting the following technical scheme:
a composite outer wall construction method for energy-saving building block decoration comprises the following steps:
step 1, respectively weighing all components of the energy-saving building block according to parts by weight, and uniformly mixing and stirring to obtain energy-saving building block mixed slurry;
step 2, pouring the energy-saving building block mixed slurry into a prepared mold, and pouring and molding;
step 3, demolding the cured and molded energy-saving building block blank, and curing to obtain an energy-saving building block;
step 4, cleaning a base layer of the outer wall, coating a layer of bonding mortar on the surface layer of the base layer, paving the energy-saving building blocks on the surface of the bonding layer according to a preset design, and filling the bonding mortar between every two adjacent energy-saving building blocks;
and 5, coating decorative paint on the surface of the energy-saving building block after the bonding layer is completely dried, thus finishing construction.
Preferably, the length of the energy-saving building block is 15-20 cm, the width of the energy-saving building block is 5-10 cm, and the thickness of the energy-saving building block is 2-4 cm.
Preferably, the energy-saving building block curing treatment mode is plastic film wrapping curing, and the curing time is 28 days.
Preferably, the thickness of the adhesive layer is 3 to 5mm.
Preferably, the adhesive layer is dried in a way that the plastic film is wrapped and maintained for 28 days after the energy-saving building blocks are paved.
Preferably, the bonding mortar comprises the following components in parts by weight:
100 to 120 parts of Portland cement, 58 to 65 parts of quartz sand, 10 to 12 parts of fly ash, 1 to 3 parts of lignin fiber, 2 to 5 parts of redispersible emulsion powder and 60 to 70 parts of water.
Preferably, the Portland cement is Portland cement PO42.5.
Preferably, the particle size of the fly ash is 100-200 mu m, and the fly ash is national standard first-grade fly ash.
Preferably, the particle size of the quartz sand is 0.5-2 mm, wherein SiO 2 The content is more than 90 percent, fe 2 O 3 The content is less than 0.05 percent.
Preferably, the length of the lignin fiber is 2-5 mm, the diameter is 20-30 mu m, and the ash content is 15% -18%.
Preferably, the particle size of the redispersible emulsion powder is 150 mu m, the solid content is more than 98.0%, and the ash content is 10% -12%.
Preferably, the energy-saving building block comprises the following components in parts by weight:
120-165 parts of silicate cement, 72-98 parts of scandium silicate coated vitrified micro bubble, 54-68 parts of fly ash, 42-63 parts of quartz sand, 0.8-2.2 parts of polypropylene fiber, 0.5-1 part of water reducer and 80-100 parts of water.
Preferably, the Portland cement is Portland cement PO42.5.
Preferably, the scandium silicate coated vitrified micro bubble has a particle size of 2.0-4.0 mm.
Preferably, the particle size of the fly ash is 100-200 mu m, and the fly ash is national standard first-grade fly ash.
Preferably, the particle size of the quartz sand is 0.5-2 mm, wherein SiO 2 The content is more than 90 percent, fe 2 O 3 The content is less than 0.05 percent.
Preferably, the polypropylene fibers have a length of 5 to 10mm and a diameter of 10 to 20 μm.
Preferably, the water reducer is a naphthalene water reducer, in particular a powdery ZG-2 naphthalene high-efficiency water reducer.
Preferably, the preparation method of the scandium silicate coated vitrified microbead comprises the following steps:
s1, weighing vitrified microbeads, ultrasonically cleaning the vitrified microbeads by using an ethanol aqueous solution, and drying the vitrified microbeads for later use;
s2, placing the cleaned vitrified micro bubbles in an alkaline solution, uniformly mixing, heating to 45-55 ℃, preserving heat, stirring for 4-6 hours, and cooling to room temperature to obtain a first treatment liquid of the vitrified micro bubbles;
s3, weighing scandium chloride, mixing with deionized water, and stirring until the scandium chloride is completely dissolved to obtain scandium chloride solution;
s4, uniformly stirring the first treatment liquid of the vitrified micro bubbles at room temperature, dropwise adding silicic acid sol, continuously stirring during the dropwise adding, and continuously stirring at room temperature for 3-6 hours after dropwise adding to obtain the second treatment liquid of the vitrified micro bubbles;
s5, adding scandium chloride solution into the second treatment solution of the vitrified micro bubbles dropwise, stirring at room temperature for 2-4 hours, heating to 75-85 ℃, stirring for 1-3 hours, filtering, collecting solid matters, washing with alkali liquor for at least three times, washing with pure water until the washing solution is neutral, drying, and sieving to obtain scandium silicate coated vitrified micro bubbles.
Preferably, in the step S1, the mass fraction of the aqueous solution of ethanol is 30% -50%, and the mass ratio of the vitrified microbeads to the aqueous solution of ethanol is 1:5-10.
Preferably, in the step S2, the alkaline solution is sodium hydroxide solution, and the mass fraction of the alkaline solution is 5% -10%.
Preferably, in the step S2, the mass ratio of the vitrified microbeads after cleaning to the alkaline solution is 1:6-12.
Preferably, in the step S3, the mass ratio of scandium chloride to deionized water is 1.5-2.5:10.
Preferably, in the step S4, the preparation method of the silicic acid sol comprises:
and (3) weighing sodium silicate and deionized water, mixing the sodium silicate and the deionized water according to the mass ratio of 1:10-15 to form sodium silicate solution, and performing ion exchange by using cation exchange resin to finally obtain silicic acid sol with the pH value of 2.0-3.0.
Preferably, the cation exchange resin is a strongly acidic styrene cation exchange resin, which acts to remove sodium ions.
Preferably, in the step S4, the mass ratio of the silicic acid sol to the first treatment liquid of the vitrified micro bubbles is 1:7-9.
Preferably, in the step S5, the mass ratio of the scandium chloride solution to the second treatment solution for vitrified micro bubbles is 1:4-6.
The beneficial effects of the invention are as follows:
1. the invention discloses a composite outer wall construction method for energy-saving building block decoration, and mainly aims to solve the problems of insufficient heat preservation effect and unsatisfactory heat insulation effect of the energy-saving building block in the prior art. The scandium silicate coated vitrified microsphere is added to replace the vitrified microsphere as a heat-insulating component, so that the heat insulation performance of the traditional vitrified microsphere is enhanced, and the defects of high water absorption, high shrinkage and low adhesiveness of the traditional vitrified microsphere are overcome.
2. The invention also improves the bonding mortar for connecting the energy-saving building block with the outer wall base layer, and lignin fiber and redispersible latex powder are added in the bonding mortar, so that the bonding firmness of the bonding mortar is ensured, the flexibility of the bonding mortar is enhanced, the bonding property of the energy-saving building block can be ensured, and the heat preservation performance of the energy-saving building block is ensured.
3. When scandium silicate coated vitrified micro bubbles are prepared, the property of the vitrified micro bubbles is skillfully utilized, so that sodium silicate is generated on the surface of the vitrified micro bubbles through alkali liquor corrosion, the raw material for preparing scandium silicate later is generated, the specific surface area of the vitrified micro bubbles is increased, and the surface activity is increased, so that the subsequent coating can be performed more stably and smoothly.
4. In the process of preparing scandium silicate coated vitrified micro bubble, two sources of sodium silicate exist, one is that silicon dioxide on the surface layer of the vitrified micro bubble is corroded to generate soluble sodium silicate, and the other is that sodium silicate generated by the reaction of subsequently added silicic acid sol and sodium hydroxide. Therefore, in the preparation process of the invention, no waste of raw materials is generated, but the product generated by etching with alkali liquor is continuously reacted to generate scandium silicate. In some researches, scandium silicate has stronger high-temperature heat resistance stability and corrosion resistance, so that scandium silicate is coated on the surface of the existing vitrified micro bubble, and compared with the vitrified micro bubble, scandium silicate has better heat insulation performance in concrete, and the defects of large shrinkage and large water absorption caused by the vitrified micro bubble are overcome, and meanwhile, the mechanical property of the concrete is also enhanced.
Detailed Description
The technical features, objects and advantages of the present invention will be more clearly understood from the following detailed description of the technical aspects of the present invention, but should not be construed as limiting the scope of the invention.
The vitrified microbead is a novel inorganic light heat insulating material with high performance, has very stable physical and chemical properties, high ageing resistance and weather resistance, excellent heat insulation, fire resistance and sound absorption performance, is suitable for being used as light filling aggregate and heat insulation, fire resistance, sound absorption and heat insulation materials in various fields, and is often used as a heat insulation material to be added into heat insulation concrete, but the vitrified microbead also has the defects of high water absorption, high shrinkage and low adhesion, and the defects limit the application of the vitrified microbead in the concrete, and influence the mechanical property and the heat insulation effect of the concrete.
In the preparation of the scandium silicate coated vitrified microsphere, firstly, the vitrified microsphere is cleaned to remove impurity components on the surface layer of the vitrified microsphere, then, an alkaline sodium hydroxide solution is used for treatment, so that silicon dioxide on the surface layer of the vitrified microsphere is corroded by alkali liquor to generate soluble sodium silicate, meanwhile, the surface of the microsphere forms uneven dents, the surface activity is also increased, then, silicic acid sol is added into a first treatment solution of the vitrified microsphere to neutralize redundant sodium hydroxide to generate soluble sodium silicate, then, scandium chloride solution is added into a second treatment solution of the vitrified microsphere, scandium ions react with sodium silicate in the second treatment solution of the vitrified microsphere to generate scandium silicate precipitate, scandium silicate is gradually generated on the surface of the vitrified microsphere in the continuous stirring process, thus, the scandium silicate coated vitrified microsphere is formed, and then, water and alkali liquor are used for cleaning impurities.
The invention is further described with reference to the following examples.
Example 1
A composite outer wall construction method for energy-saving building block decoration comprises the following steps:
step 1, respectively weighing all components of the energy-saving building block according to parts by weight, and uniformly mixing and stirring to obtain energy-saving building block mixed slurry;
step 2, pouring the energy-saving building block mixed slurry into a prepared mold, and pouring and molding;
step 3, demolding the cured and molded energy-saving building block blank, wherein the length of the energy-saving building block is 18cm, the width of the energy-saving building block is 8cm, the thickness of the energy-saving building block is 3cm, and packaging and curing the energy-saving building block by using a plastic film for 28 days to obtain the energy-saving building block;
step 4, cleaning a base layer of the outer wall, coating a layer of bonding mortar with the thickness of 4mm on the surface layer of the base layer, paving the energy-saving building blocks on the surface of the bonding layer according to a preset design, and filling the bonding mortar between every two adjacent energy-saving building blocks;
and 5, coating decorative paint on the surface of the energy-saving building block after the bonding layer is completely dried, thus finishing construction.
In the step 4, the bonding mortar comprises the following components in parts by weight:
110 parts of Portland cement PO42.5, 62 parts of quartz sand, 11 parts of fly ash, 2 parts of lignin fiber, 3 parts of redispersible emulsion powder and 65 parts of water.
Wherein, the particle size of the fly ash is 100-200 mu m, and the fly ash is national standard first-grade fly ash; the particle size of the quartz sand is 0.5-2 mm, wherein SiO 2 The content is more than 90 percent, fe 2 O 3 The content is less than 0.05%; the length of the lignin fiber is 2-5 mm, the diameter is 20-30 mu m, and the ash content is 15% -18%; the particle size of the redispersible emulsion powder is 150 mu m, the solid content is more than 98.0%, and the ash content is 10% -12%.
In the step 1, the energy-saving building block comprises the following components in parts by weight:
132 parts of ordinary Portland cement PO42.5, 85 parts of scandium silicate coated vitrified micro bubble, 62 parts of fly ash, 56 parts of quartz sand, 1.4 parts of polypropylene fiber, 0.5 part of ZG-2 naphthalene high-efficiency water reducer and 90 parts of water.
Wherein the grain diameter of scandium silicate coated vitrified micro bubble is 2.0-4.0 mm; the particle size of the fly ash is 100-200 mu m, and the fly ash is national standard first-grade fly ash; the particle size of the quartz sand is 0.5-2 mm, wherein SiO 2 The content is more than 90 percent, fe 2 O 3 The content is less than 0.05%; the length of the polypropylene fiber is 5-10 mm, and the diameter is 10-20 mu m.
The preparation method of the scandium silicate coated vitrified microbead comprises the following steps:
s1, weighing vitrified microbeads, mixing the vitrified microbeads with 30% ethanol water solution according to a mass ratio of 1:8, performing ultrasonic treatment for 1h, cleaning, and drying for later use;
s2, uniformly mixing the cleaned vitrified micro bubbles with 10% sodium hydroxide solution according to the mass ratio of 1:8, heating to 50 ℃, preserving heat and stirring for 5 hours, and cooling to room temperature to obtain a first treatment solution of the vitrified micro bubbles;
s3, weighing scandium chloride, mixing the scandium chloride with deionized water according to a mass ratio of 2:10, and stirring until the scandium chloride is completely dissolved to obtain a scandium chloride solution;
s4, weighing sodium silicate and deionized water, mixing according to the mass ratio of 1:12 to form sodium silicate solution, and using strong acid styrene cation exchange resin to exchange and remove sodium ions to finally obtain silicic acid sol with the pH value of 2.0-3.0;
s5, uniformly stirring the first treatment liquid of the vitrified micro bubbles at room temperature, dropwise adding silicic acid sol, wherein the mass ratio of the silicic acid sol to the first treatment liquid of the vitrified micro bubbles is 1:8, continuously stirring during the dropwise adding, and continuously stirring for 4 hours at room temperature after dropwise adding to obtain the second treatment liquid of the vitrified micro bubbles;
s6, adding scandium chloride solution into the second treatment liquid of the vitrified micro bubbles dropwise, wherein the mass ratio of the scandium chloride solution to the second treatment liquid of the vitrified micro bubbles is 1:5, stirring at room temperature for 3 hours, heating to 80 ℃, stirring for 2 hours, filtering and collecting solid matters, washing with alkali liquor for at least three times, washing with pure water until the washing liquid is neutral, drying, and sieving to obtain scandium silicate coated vitrified micro bubbles.
Example 2
A composite outer wall construction method for energy-saving building block decoration comprises the following steps:
step 1, respectively weighing all components of the energy-saving building block according to parts by weight, and uniformly mixing and stirring to obtain energy-saving building block mixed slurry;
step 2, pouring the energy-saving building block mixed slurry into a prepared mold, and pouring and molding;
step 3, demolding the cured and molded energy-saving building block blank, wherein the length of the energy-saving building block is 15cm, the width of the energy-saving building block is 5cm, the thickness of the energy-saving building block is 2cm, and packaging and curing the energy-saving building block by using a plastic film for 28 days to obtain the energy-saving building block;
step 4, cleaning a base layer of the outer wall, coating a layer of bonding mortar with the thickness of 3mm on the surface layer of the base layer, paving the energy-saving building blocks on the surface of the bonding layer according to a preset design, and filling the bonding mortar between every two adjacent energy-saving building blocks;
and 5, after the energy-saving building blocks are paved, wrapping and curing for 28 days by using a plastic film, and coating decorative paint on the surfaces of the energy-saving building blocks after the bonding layers are completely dried, thus finishing construction.
In the step 4, the bonding mortar comprises the following components in parts by weight:
100 parts of Portland cement PO42.5, 58 parts of quartz sand, 10 parts of fly ash, 1 part of lignin fiber, 2 parts of redispersible emulsion powder and 60 parts of water.
Wherein, the particle size of the fly ash is 100-200 mu m, and the fly ash is national standard first-grade fly ash; the particle size of the quartz sand is 0.5-2 mm, wherein SiO 2 The content is more than 90 percent, fe 2 O 3 The content is less than 0.05%; the length of the lignin fiber is 2-5 mm, the diameter is 20-30 mu m, and the ash content is 15% -18%; the particle size of the redispersible emulsion powder is 150 mu m, the solid content is more than 98.0%, and the ash content is 10% -12%.
In the step 1, the energy-saving building block comprises the following components in parts by weight:
120 parts of ordinary Portland cement PO42.5, 72 parts of scandium silicate coated vitrified micro bubble, 54 parts of fly ash, 42 parts of quartz sand, 0.8 part of polypropylene fiber, 0.5 part of ZG-2 naphthalene high-efficiency water reducer and 80 parts of water.
Wherein the grain diameter of scandium silicate coated vitrified micro bubble is 2.0-4.0 mm; the particle size of the fly ash is 100-200 mu m, and the fly ash is national standard first-grade fly ash; the particle size of the quartz sand is 0.5-2 mm, wherein SiO 2 The content is more than 90 percent, fe 2 O 3 The content is less than 0.05%; the length of the polypropylene fiber is 5-10 mm, and the diameter is 10-20 mu m.
The preparation method of the scandium silicate coated vitrified microbead comprises the following steps:
s1, weighing vitrified microbeads, mixing the vitrified microbeads with 30% ethanol water solution according to a mass ratio of 1:5, performing ultrasonic treatment for 1h, cleaning, and drying for later use;
s2, uniformly mixing the cleaned vitrified micro bubbles with sodium hydroxide solution with the mass fraction of 5% -10% according to the mass ratio of 1:6, heating to 45 ℃, preserving heat and stirring for 4 hours, and cooling to room temperature to obtain vitrified micro bubble first treatment liquid;
s3, weighing scandium chloride, mixing the scandium chloride with deionized water according to the mass ratio of 1.5:10, and stirring until the scandium chloride is completely dissolved to obtain scandium chloride solution;
s4, weighing sodium silicate and deionized water, mixing according to the mass ratio of 1:10 to form sodium silicate solution, and using strong acid styrene cation exchange resin to exchange and remove sodium ions to finally obtain silicic acid sol with the pH value of 2.0-3.0;
s5, uniformly stirring the first treatment liquid of the vitrified micro bubbles at room temperature, dropwise adding silicic acid sol, wherein the mass ratio of the silicic acid sol to the first treatment liquid of the vitrified micro bubbles is 1:7, continuously stirring during the dropwise adding, and continuously stirring for 3 hours at room temperature after dropwise adding to obtain the second treatment liquid of the vitrified micro bubbles;
s6, adding scandium chloride solution into the second treatment liquid of the vitrified micro bubbles dropwise, wherein the mass ratio of the scandium chloride solution to the second treatment liquid of the vitrified micro bubbles is 1:4, stirring at room temperature for 2 hours, heating to 75 ℃, stirring for 1 hour, filtering and collecting solid matters, washing with alkali liquor for at least three times, washing with pure water until the washing liquid is neutral, drying, and sieving to obtain scandium silicate coated vitrified micro bubbles.
Example 3
A composite outer wall construction method for energy-saving building block decoration comprises the following steps:
step 1, respectively weighing all components of the energy-saving building block according to parts by weight, and uniformly mixing and stirring to obtain energy-saving building block mixed slurry;
step 2, pouring the energy-saving building block mixed slurry into a prepared mold, and pouring and molding;
step 3, demolding the cured and molded energy-saving building block blank, wherein the length of the energy-saving building block is 20cm, the width of the energy-saving building block is 10cm, the thickness of the energy-saving building block is 4cm, and packaging and curing the energy-saving building block by using a plastic film for 28 days to obtain the energy-saving building block;
step 4, cleaning a base layer of the outer wall, coating a layer of bonding mortar with the thickness of 5mm on the surface layer of the base layer, paving the energy-saving building blocks on the surface of the bonding layer according to a preset design, and filling the bonding mortar between every two adjacent energy-saving building blocks;
and 5, coating decorative paint on the surface of the energy-saving building block after the bonding layer is completely dried, thus finishing construction.
In the step 4, the bonding mortar comprises the following components in parts by weight:
120 parts of Portland cement PO42.5, 65 parts of quartz sand, 12 parts of fly ash, 3 parts of lignin fiber, 5 parts of redispersible emulsion powder and 70 parts of water.
Wherein, the particle size of the fly ash is 100-200 mu m, and the fly ash is national standard first-grade fly ash; the particle size of the quartz sand is 0.5-2 mm, wherein SiO 2 The content is more than 90 percent, fe 2 O 3 The content is less than 0.05%; the length of the lignin fiber is 2-5 mm, the diameter is 20-30 mu m, and the ash content is 15% -18%; the particle size of the redispersible emulsion powder is 150 mu m, the solid content is more than 98.0%, and the ash content is 10% -12%.
In the step 1, the energy-saving building block comprises the following components in parts by weight:
165 parts of ordinary Portland cement PO42.5, 98 parts of scandium silicate coated vitrified micro bubble, 68 parts of fly ash, 63 parts of quartz sand, 2.2 parts of polypropylene fiber, 1 part of ZG-2 naphthalene high-efficiency water reducer and 100 parts of water.
Wherein the grain diameter of scandium silicate coated vitrified micro bubble is 2.0-4.0 mm; the particle size of the fly ash is 100-200 mu m, and the fly ash is national standard first-grade fly ash; the particle size of the quartz sand is 0.5-2 mm, wherein SiO 2 The content is more than 90 percent, fe 2 O 3 The content is less than 0.05%; the length of the polypropylene fiber is 5-10 mm, and the diameter is 10-20 mu m.
The preparation method of the scandium silicate coated vitrified microbead comprises the following steps:
s1, weighing vitrified microbeads, mixing the vitrified microbeads with 50% ethanol aqueous solution according to a mass ratio of 1:10, performing ultrasonic treatment for 1h, cleaning, and drying for later use;
s2, uniformly mixing the cleaned vitrified micro bubbles with 10% sodium hydroxide solution according to the mass ratio of 1:12, heating to 55 ℃, preserving heat and stirring for 6 hours, and cooling to room temperature to obtain a first treatment solution of the vitrified micro bubbles;
s3, weighing scandium chloride, mixing the scandium chloride with deionized water according to the mass ratio of 2.5:10, and stirring until the scandium chloride is completely dissolved to obtain scandium chloride solution;
s4, weighing sodium silicate and deionized water, mixing according to the mass ratio of 1:15 to form sodium silicate solution, and using strong acid styrene cation exchange resin to exchange and remove sodium ions to finally obtain silicic acid sol with the pH value of 2.0-3.0;
s5, uniformly stirring the first treatment liquid of the vitrified micro bubbles at room temperature, dropwise adding silicic acid sol, wherein the mass ratio of the silicic acid sol to the first treatment liquid of the vitrified micro bubbles is 1:9, continuously stirring during the dropwise adding, and continuously stirring for 6 hours at room temperature after dropwise adding to obtain the second treatment liquid of the vitrified micro bubbles;
s6, adding scandium chloride solution into the second treatment liquid of the vitrified micro bubbles dropwise, wherein the mass ratio of the scandium chloride solution to the second treatment liquid of the vitrified micro bubbles is 1:6, stirring at room temperature for 4 hours, heating to 85 ℃, stirring for 3 hours, filtering and collecting solid matters, washing with alkali liquor for at least three times, washing with pure water until the washing liquid is neutral, drying, and sieving to obtain scandium silicate coated vitrified micro bubbles.
Comparative example 1
The bonding mortar comprises the following components in parts by weight:
110 parts of Portland cement PO42.5, 62 parts of quartz sand, 11 parts of fly ash and 65 parts of water.
Wherein, the particle size of the fly ash is 100-200 mu m, and the fly ash is national standard first-grade fly ash; the particle size of the quartz sand is 0.5-2 mm, wherein SiO 2 The content is more than 90 percent, fe 2 O 3 The content is less than 0.05 percent.
And curing the bonding mortar, namely, after the energy-saving building blocks are paved, wrapping and curing for 28 days by using a plastic film.
Comparative example 2
The energy-saving building block comprises the following components in parts by weight:
132 parts of ordinary Portland cement PO42.5, 85 parts of vitrified micro bubbles, 62 parts of fly ash, 56 parts of quartz sand, 1.4 parts of polypropylene fiber, 0.5 part of ZG-2 naphthalene high-efficiency water reducer and 90 parts of water.
Wherein, the particle size of the vitrified microbeads is 2.0-4.0 mm; the particle size of the fly ash is 100-200 mu m, and the fly ash is national standard first-grade fly ash; the particle size of the quartz sand is 0.5-2 mm, wherein SiO 2 The content is more than 90 percent, fe 2 O 3 The content is less than 0.05%; the length of the polypropylene fiber is 5-10 mm, and the diameter is 10-20 mu m.
The preparation method of the energy-saving building block comprises the following steps:
step 1, respectively weighing all components of the energy-saving building block according to parts by weight, and uniformly mixing and stirring to obtain energy-saving building block mixed slurry;
step 2, pouring the energy-saving building block mixed slurry into a prepared mold, and pouring and molding;
and step 3, demolding the cured and molded energy-saving building block blank, wherein the length of the energy-saving building block is 18cm, the width of the energy-saving building block is 8cm, the thickness of the energy-saving building block is 3cm, and packaging and curing the energy-saving building block by using a plastic film for 28 days to obtain the energy-saving building block.
In order to more clearly illustrate the invention, the performance of the bonding mortar and the energy-saving building block prepared by the invention is detected and compared, and the method comprises the following steps:
1. the adhesive mortars prepared in examples 1 to 3 and comparative example 1 of the present invention were tested for tensile bond strength with cement mortar using standard JC/T547-2017 ceramic tile adhesive and flexibility using standard JG/T157-2009, and the results are shown in table 1 below:
TABLE 1 Performance detection of different adhesive mortars
2. The following performance tests were carried out on the properties of the energy-saving blocks prepared in examples 1 to 3 and comparative example 2 according to the present invention:
compressive strength and tensile strength were measured according to GB/T50081-2019, thermal conductivity was measured according to standard GB/T10294-2008, and drying shrinkage was measured according to standard GB/T2542-2012, with the results shown in Table 2 below:
table 2 Performance detection of different energy saving blocks
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (8)
1. The composite outer wall construction method for energy-saving building block decoration is characterized by comprising the following steps of:
step 1, respectively weighing all components of the energy-saving building block according to parts by weight, and uniformly mixing and stirring to obtain energy-saving building block mixed slurry;
step 2, pouring the energy-saving building block mixed slurry into a prepared mold, and pouring and molding;
step 3, demolding the cured and molded energy-saving building block blank, and curing to obtain an energy-saving building block;
step 4, cleaning a base layer of the outer wall, coating a layer of bonding mortar on the surface layer of the base layer, paving the energy-saving building blocks on the surface of the bonding layer, and filling the bonding mortar between every two adjacent energy-saving building blocks;
step 5, after the bonding layer is completely dried, coating decorative paint on the surface of the energy-saving building block, namely finishing construction;
the energy-saving building block comprises the following components in parts by weight:
120-165 parts of silicate cement, 72-98 parts of scandium silicate coated vitrified micro bubble, 54-68 parts of fly ash, 42-63 parts of quartz sand, 0.8-2.2 parts of polypropylene fiber, 0.5-1 part of water reducer and 80-100 parts of water;
the preparation method of the scandium silicate coated vitrified microbead comprises the following steps:
s1, weighing vitrified microbeads, ultrasonically cleaning the vitrified microbeads by using an ethanol aqueous solution, and drying the vitrified microbeads for later use;
s2, placing the cleaned vitrified micro bubbles in an alkaline solution, uniformly mixing, heating to 45-55 ℃, preserving heat, stirring for 4-6 hours, and cooling to room temperature to obtain a first treatment liquid of the vitrified micro bubbles;
s3, weighing scandium chloride, mixing with deionized water, and stirring until the scandium chloride is completely dissolved to obtain scandium chloride solution;
s4, uniformly stirring the first treatment liquid of the vitrified micro bubbles at room temperature, dropwise adding silicic acid sol, continuously stirring during the dropwise adding, and continuously stirring at room temperature for 3-6 hours after dropwise adding to obtain a second treatment liquid of the vitrified micro bubbles;
and S5, dropwise adding scandium chloride solution into the second treatment solution of the vitrified micro bubbles, stirring at room temperature for 2-4 hours, heating to 75-85 ℃, stirring for 1-3 hours, filtering, collecting solid matters, washing with alkali liquor for at least three times, washing with pure water until the washing solution is neutral, drying, and sieving to obtain scandium silicate coated vitrified micro bubbles.
2. The composite outer wall construction method for energy-saving building block decoration according to claim 1, wherein the length of the energy-saving building block is 15-20 cm, the width of the energy-saving building block is 5-10 cm, and the thickness of the energy-saving building block is 2-4 cm.
3. The method for constructing the composite outer wall decorated by the energy-saving building blocks according to claim 1, wherein the curing treatment mode is plastic film wrapping curing, and the curing time is 28 days.
4. The composite exterior wall construction method for energy-saving building block decoration according to claim 1, wherein the bonding mortar comprises the following components in parts by weight:
100-120 parts of Portland cement, 58-65 parts of quartz sand, 10-12 parts of fly ash, 1-3 parts of lignin fiber, 2-5 parts of redispersible latex powder and 60-70 parts of water.
5. The method for constructing a composite exterior wall decorated with energy-saving building blocks according to claim 4, wherein, in the components of the binding mortar, the portland cement is ordinary portland cement PO42.5; the particle size of the fly ash is 100-200 mu m, and the fly ash is national standard first-grade fly ash; the particle size of the quartz sand is 0.5-2 mm, wherein SiO 2 The content is more than 90 percent, fe 2 O 3 The content is less than 0.05%; the length of the lignin fiber is 2-5 mm, the diameter is 20-30 mu m, and the ash content is 15% -18%; the particle size of the redispersible emulsion powder is 150 mu m, the solid content is more than 98.0%, and the ash content is 10% -12%.
6. The method for constructing the composite outer wall decorated by the energy-saving building block according to claim 1, wherein the silicate cement is ordinary silicate cement PO42.5; the particle size of the scandium silicate coated vitrified micro bubble is 2.0-4.0 mm; the fly ashThe particle size of the fly ash is 100-200 mu m, and the fly ash is national standard first-grade fly ash; the particle size of the quartz sand is 0.5-2 mm, wherein SiO 2 The content is more than 90 percent, fe 2 O 3 The content is less than 0.05%; the length of the polypropylene fiber is 5-10 mm, and the diameter is 10-20 mu m; the water reducer is naphthalene water reducer.
7. The method for constructing a composite exterior wall decorated by energy-saving building blocks according to claim 1, wherein in the step S4, the preparation method of silicic acid sol is as follows:
and (3) weighing sodium silicate and deionized water, mixing the sodium silicate and the deionized water according to the mass ratio of 1:10-15 to form sodium silicate solution, and performing ion exchange by using cation exchange resin to finally obtain the silicic acid sol with the pH value of 2.0-3.0.
8. The method for constructing an energy-saving building block decorative composite outer wall according to claim 7, wherein the cation exchange resin is a strong acid styrene cation exchange resin, and is used for removing sodium ions.
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