CN102936117B

CN102936117B - Preparing method of exterior wall external heat insulation material of geopolymer-based polyphenyl particle building

Info

Publication number: CN102936117B
Application number: CN201210467740.7A
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: 2014-07-02
Anticipated expiration: 2032-11-19
Also published as: CN102936117A

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 a national total energy consumption.Building will surmount the other industries such as industry to be become with the main growth point of energy.Relevant department sends warning, carries out building energy conservation if do not accelerated, and to the year two thousand twenty, the energy consumption of whole nation building will be up to 1,100,000,000 tons of standard coals, is that at present national all buildings consume the more than 3 times of the energy.Building energy consumption is often taking heating and air conditioning energy consumption as main, and therefore 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, wherein granular polystyrene (or EPS particle) heat-insulating mortar exterior wall outer heat preservation system, to suit the Status of development of China's Building Energy-saving Work, complete the advantage that traditional mortar performance is promoted and shown one's talent.Polyphenyl particle heat-insulating mortar, normally taking cement as agglutination material, processes with the eps foam of discarding the fine particle being broken into, or adopts former eps foam particle as light skeletal, and adds appropriate binding agent, forms by suitable proportion mixed preparing.In recent years, rapidly, oneself reaches 500,000 tons annual production in China's polystyrene foam (EPS) development.EPS is mostly disposable use, has every year the waste EPS of up to ten million cubic meters to become environmentally hazardous white pollution because not processing with degraded.Using broken EPS particle as main light skeletal preparation EPS thermal insulation mortar, not only can turn waste into wealth, as long as and take suitable technological line, just can make high performance thermal insulation mortar.

Geopolymer (geopolymer) refers to the class novel inorganic gelling material that metakaolin containing active silica-alumina group forms through similar geochemistry process or geology Synthesis under the effect of exciting agent, 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.Geopolymer molecule is crossed covalent linkage by links such as Si, Al, O elements completely and is formed, there is 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 exterior wall heat insulating material for external.

Practice shows to 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 taking 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 ground polymers gelling material.Based on this Research Thinking, adopt redispersable latex powder and trolamine composite modifier to EPS particle surface modification, add again ground polymers gelling material to make the modified polyphenyl particle with nucleocapsid structure, make EPS particle surface become wetting ability from hydrophobic nature, the thermal insulation mortar high comprehensive performance making on this basis.

Summary of the invention

The object of this invention is to provide the preparation method of a kind of production technique environmental protection, energy-conservation ground polymers base polyphenyl particle external wall heat insulating material for external, 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) by diatomite roasting twice at 450 DEG C in retort furnace, each 2 hours; By former flyash ash, wear into 250-350 object powder; The alkali-activator that is 1-1.4 with sodium hydroxide adjusting industrial-grade sodium silicate solution acquisition alkali-activator modulus.

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

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

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

(5) water that is 8-20% by weight percent joins in the modified polyphenyl particle that step (4) that the weight percent that constantly stirs is 39-60% makes, then adding weight percent is the methylcellulose gum that the ground polymers gelling material of step (2) gained of 30-50%, redispersable latex powder that weight percent is 1-3% and weight percent are 0-1%, under constantly stirring, add water, until the viscosity of slurry appropriateness while stopping adding, stir again 10 minutes, can obtain thermal insulation mortar.

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

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

Brief description of the drawings

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

Fig. 2 is the lagging material sectional drawing not preparing through modified polyphenyl particle.

Embodiment

Embodiment:

(1) by diatomite roasting twice at 450 DEG C in retort furnace, each 2 hours; By former flyash ash, wear into 300 object powder; With sodium hydroxide regulate industrial-grade sodium silicate solution obtain the alkali-activator that alkali-activator modulus is 1.2 (measure 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, then weighing sodium hydroxide is (with Na ₂o meter) quality 8g., mix).

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

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

(5) water that is 17% by weight percent joins in the modified polyphenyl particle that step (4) that the weight percent that constantly stirs is 45% makes, then adding weight percent is the methylcellulose gum that the ground polymers gelling material of 35% step (2) gained, redispersable latex powder that weight percent is 2% and weight percent are 1%, under constantly stirring, add water, until the viscosity of slurry appropriateness while stopping adding, stir again 10 minutes, can obtain thermal insulation mortar.

The lagging material (Fig. 1) preparing as stated above 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. a preparation method for ground polymers base polyphenyl particle external wall heat insulating material for external, is characterized in that concrete steps are:

(1) by diatomite roasting twice at 450 DEG C in retort furnace, each 2 hours; By former flyash ash, wear into 300 object powder; The alkali-activator that is 1.2 with sodium hydroxide adjusting industrial-grade sodium silicate solution acquisition alkali-activator modulus;

(2) diatomite, flyash and the alkali-activator of distilled water and step (1) acquisition are mixed, after stirring, then continue to stir 0.5 hour, obtain ground polymers gelling material; The weight percent of distilled water, diatomite and flyash is respectively: 20%, 72%, 8%, and alkali-activator modulus is 1.2; Described alkali-activator by 29.5mL degree Beaume be 39.7, Na ₂o mass percent is 8.75%, SiO ₂mass percent is 27.6%, modulus is 3.26, the water glass of density 1.40g/mL and with Na ₂the sodium hydroxide of O meter 8g mixes;

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

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

(5) water that is 17% by weight percent joins in the modified polyphenyl particle that step (4) that the weight percent that constantly stirs is 45% makes, then adding weight percent is the methylcellulose gum that the ground polymers gelling material of 35% step (2) gained, redispersable latex powder that weight percent is 2% and weight percent are 1%, under constantly stirring, add water, until the viscosity of slurry appropriateness while stopping adding, stir again 10 minutes, can obtain thermal insulation mortar;