CN102936117A

CN102936117A - Preparing method of exterior wall external heat insulation material of geopolymer-based polyphenyl particle building

Info

Publication number: CN102936117A
Application number: CN2012104677407A
Authority: CN
Inventors: 刘峥; 刘洁; 袁帅
Original assignee: Guilin University of Technology
Current assignee: Guilin University of Technology
Priority date: 2012-11-19
Filing date: 2012-11-19
Publication date: 2013-02-20
Anticipated expiration: 2032-11-19
Also published as: CN102936117B

Abstract

The invention discloses a preparing method of an exterior wall external heat insulation material of a geopolymer-based polyphenyl particle building and relates to the field of building exterior wall external heat insulation materials. The exterior wall external heat insulation material is characterized by containing 30-50% of geopolymer cementing materials, 39-60% of modified polyphenyl particles, 1-3% of redispersible latex powder and 0-1% of methyl celluloses according to weight percentage. In the preparing process, polyphenyl particle surfaces are modified, modified polyphenyl particles of a core-shell structure are prepared, compatibility of the modified polyphenyl particles and other geopolymer cementing materials is effectively improved, and accordingly thermal insulation mortar comprehensive performance is improved. The geopolymer cementing materials replace the traditional cement so that the exterior wall external heat insulation material of the geopolymer-based polyphenyl particle building has the advantages of being environment-friendly and energy-saving in production process.

Description

The preparation method of ground polymers base polyphenyl particle external wall heat insulating material for external

Technical field

The present invention relates to external wall heat insulating material for external field, being specifically related to is the preparation method of a kind of ground polymers base polyphenyl particle external wall heat insulating material for external.

Background technology

In the growing energy consumption in the whole world, no matter be industrially developed country or developing country, building energy consumption all accounts for sizable ratio in the total energy consumption of a country.Building will surmount the other industry such as industry to be become with can main growth point.Relevant department sends caution, and as not accelerating to carry out building energy conservation, to the year two thousand twenty, the energy consumption of whole nation building will up to 1,100,000,000 tons of standard coals, be that all buildings of the whole nation consume more than 3 times of the energy at present.Building energy consumption is often take heating and air conditioning energy consumption as main, so the emphasis of building energy conservation is to reduce heating and energy consumption for cooling.Wherein to strengthen exactly building heat preservation heat insulation in most economical effective conservation measures.Exterior-wall heat insulation is as the important technical of building energy conservation at present, become the focus of building energy conservation, granular polystyrene (or EPS particle) heat-insulating mortar exterior wall outer heat preservation system wherein, to suit the Status of development of China's Building Energy-saving Work, finished the advantage that traditional mortar performance is promoted and shown one's talent.Polyphenyl particle heat-insulating mortar is processed the fine particle that is broken into, or is adopted former eps foam particle as light skeletal, and add an amount of binding agent normally take cement as agglutination material with discarded eps foam, form by the suitable proportion mixed preparing.In recent years, China's polystyrene foam (EPS) development is rapid, and oneself reaches 500,000 tons annual production.EPS mostly is greatly disposable use, and the waste EPS that up to ten million cubic meter arranged every year becomes environmentally hazardous white pollution because not processing with degrading., not only can turn waste into wealth as main light skeletal preparation EPS thermal insulation mortar with broken EPS particle, as long as and take the technological line that suits, just can make high performance thermal insulation mortar.

The metakaolin that geopolymer (geopolymer) refers to contain the active silica-alumina group under the effect of exciting agent through similar geochemistry process or geology Synthesis and a class novel inorganic gelling material that forms, the production technique of ground polymers gelling material is simpler than cement, therefore its use properties and environmental benefit are better than silicate cement, be expected to replace silicate cement, become building cementing material of new generation.The geopolymer molecule is crossed covalent linkage by links such as Si, Al, O elements fully and is consisted of, has three-dimensional net structure, and at high temperature also can keep network structure complete, thereby ground polymers material has the intensity higher than Portland cement, hardness, toughness, high-temperature stability and frost resistance.Existing slip-stick artist develops ground polymers base EPS lightweight thermal baffle, makes people see the application prospect of ground polymers base in the exterior wall heat insulating material for external.

Practice shows will prepare qualified ground polymers base polyphenyl particle external wall heat insulating material for external, and solving ground polymers gelling material and granular polystyrene consistency is key problem in technology.The present invention is take redispersable latex powder and trolamine composite modifier as " bridge " ,Utilize it amphipathic, hydrophobic grouping and EPS particle surface produce physical adsorption, and align in its surface; Hydrophilic radical outwards points to solution, and the polar group in ground polymers gelling material is combined by chemisorption, effectively improves the interfacial state between EPS particle and the ground polymers gelling material.Based on this Research Thinking, adopt redispersable latex powder and trolamine composite modifier to the EPS particle surface modification, add again ground polymers gelling material and make the modified polyphenyl particle with nucleocapsid structure, make the EPS particle surface become wetting ability by hydrophobic nature, the thermal insulation mortar high comprehensive performance that makes on this basis.

Summary of the invention

The preparation method who the purpose of this invention is to provide a kind of production technique environmental protection, energy-conservation ground polymers base polyphenyl particle external wall heat insulating material for external is to replace the preparation method of with serious pollution traditional concrete-based polyphenylene granule external wall heat insulating material for external.

Concrete steps are:

(1) with diatomite 450 ℃ of lower roastings twice in retort furnace, each 2 hour; With the former ash of flyash, wear into 250-350 purpose powder; Regulating industrial-grade sodium silicate solution acquisition alkali-activator modulus with sodium hydroxide is the alkali-activator of 1-1.4.

(2) diatomite, flyash and the alkali-activator with distilled water and step (1) acquisition mixes, and after stirring, continues to stir 0.5 hour again, obtains ground polymers gelling material; The weight percent of distilled water, diatomite and flyash is respectively: 18-24%, 70-74%, 6-12%, alkali-activator modulus are 1-1.4.

(3) auxiliary lower in ultrasonic wave, respectively redispersable latex powder and trolamine are dissolved in the water, be made into respectively weight percent and be 3% the aqueous solution, and will above-mentioned two kinds of aqueous solution by volume for the 1:1 mixing, get composite modified agent solution.

(4) step (3) gained composite modifier is sprayed at granular polystyrene (EPS) surface of constantly stirring, until particle surface is wetting fully, add again the ground polymers gelling material that step (2) makes, continue to stir 0.5 hour, put into baking oven, slowly be heated to complete drying, get puffy modified polyphenyl particle, the weight ratio 3-4:1 of ground polymers gelling material and granular polystyrene (EPS).

(5) be that to join the weight percent that constantly stirs be in the modified polyphenyl particle that makes of the step (4) of 39-60% for the water of 8-20% with weight percent, then add the ground polymers gelling material of the step that weight percent is 30-50% (2) gained, redispersable latex powder and the weight percent that weight percent is 1-3% is the methylcellulose gum of 0-1%, under constantly stirring, add entry, until in the viscosity of slurry when appropriateness, stop to add, restir 10 minutes can obtain thermal insulation mortar.

(6) thermal insulation mortar that step (5) is made is poured in the steel die, and is floating, and maintenance is 24 hours at ambient temperature, the demoulding, and at room temperature maintenance is 14 days again, obtains lagging material.

Production technique environmental protection of the present invention, energy-conservation.

Description of drawings

Fig. 1 is the lagging material sectional drawing that the embodiment of the invention prepares through the modified polyphenyl particle.

The lagging material sectional drawing of Fig. 2 for not preparing through the modified polyphenyl particle.

Embodiment

Embodiment:

(1) with diatomite 450 ℃ of lower roastings twice in retort furnace, each 2 hour; With the former ash of flyash, wear into 300 purpose powder; With sodium hydroxide regulate industrial-grade sodium silicate solution obtain the alkali-activator modulus be 1.2 alkali-activator (measure the 29.5mL degree Beaume and be 39.7, W(Na ₂O)=8.75%, W(SiO ₂)=27.6%, modulus are 3.26, the water glass of density 1.40g/mL, and weighing sodium hydroxide is (with Na again ₂The O meter) quality 8g. mixes).

(2) diatomite that distilled water and step (1) is obtained, flyash and, alkali-activator mixes, and after stirring, continues to stir 0.5 hour again, obtains ground polymers gelling material; The weight percent of distilled water, diatomite and flyash is respectively: 20%, 72%, 8%, and the alkali-activator modulus is 1.2.

(4) step (3) gained composite modifier is sprayed at granular polystyrene (EPS) surface of constantly stirring, until particle surface is wetting fully, add again the ground polymers gelling material that step (2) makes, continue to stir 0.5 hour, put into baking oven, slowly be heated to complete drying, get puffy modified polyphenyl particle, the weight ratio 3.5:1 of ground polymers gelling material and granular polystyrene (EPS).

(5) be that to join the weight percent that constantly stirs be in the modified polyphenyl particle that makes of 45% step (4) for 17% water with weight percent, then ground polymers gelling material, the weight percent that adds weight percent and be 35% step (2) gained is that 2% redispersable latex powder and weight percent are 1% methylcellulose gum, under constantly stirring, add entry, until in the viscosity of slurry when appropriateness, stop to add, restir 10 minutes can obtain thermal insulation mortar.

The lagging material for preparing as stated above (Fig. 1) and show that by the contrast photo that does not prepare lagging material (Fig. 2) section through the granular polystyrene of modification granular polystyrene significantly improves the interface compatibility of EPS particle and ground polymers gelling material through modification.

Claims

1. the preparation method of a ground polymers base polyphenyl particle external wall heat insulating material for external is characterized in that concrete steps are:

(1) with diatomite 450 ℃ of lower roastings twice in retort furnace, each 2 hour; With the former ash of flyash, wear into 250-350 purpose powder; Regulating industrial-grade sodium silicate solution acquisition alkali-activator modulus with sodium hydroxide is the alkali-activator of 1-1.4;

(2) diatomite, flyash and the alkali-activator with distilled water and step (1) acquisition mixes, and after stirring, continues to stir 0.5 hour again, obtains ground polymers gelling material; The weight percent of distilled water, diatomite and flyash is respectively: 18-24%, 70-74%, 6-12%, alkali-activator modulus are 1-1.4;

(3) auxiliary lower in ultrasonic wave, respectively redispersable latex powder and trolamine are dissolved in the water, be made into respectively weight percent and be 3% the aqueous solution, and will above-mentioned two kinds of aqueous solution by volume for the 1:1 mixing, get composite modified agent solution;

(4) step (3) gained composite modifier is sprayed at the granular polystyrene surface of constantly stirring, until particle surface is wetting fully, add again the ground polymers gelling material that step (2) makes, continue to stir 0.5 hour, put into baking oven, slowly be heated to complete drying, get puffy modified polyphenyl particle, the weight ratio 3-4:1 of ground polymers gelling material and granular polystyrene;

(5) be that to join the weight percent that constantly stirs be in the modified polyphenyl particle that makes of the step (4) of 39-60% for the water of 8-20% with weight percent, then add the ground polymers gelling material of the step that weight percent is 30-50% (2) gained, redispersable latex powder and the weight percent that weight percent is 1-3% is the methylcellulose gum of 0-1%, under constantly stirring, add entry, until in the viscosity of slurry when appropriateness, stop to add, restir 10 minutes can obtain thermal insulation mortar;