CN103922683A

CN103922683A - Energy-saving thermal insulation mortar for building exterior walls

Info

Publication number: CN103922683A
Application number: CN201410088272.1A
Authority: CN
Inventors: 张国辉; 王辉; 温海滨
Original assignee: University of Jinan
Current assignee: University of Jinan
Priority date: 2014-03-12
Filing date: 2014-03-12
Publication date: 2014-07-16

Abstract

The invention relates to an energy-saving thermal insulation mortar for building exterior walls and a manufacturing method thereof, especially to a thermal insulation mortar for chemical gypsum exterior walls and a manufacturing method thereof. The building energy-saving thermal insulation mortar is formed by mixing a binding material, a thermal insulation lightweight aggregate and water, and is characterized in that chemical gypsum is doped in large quantities into the binding material under the action of a modified additive. Each performance of the prepared thermal insulation mortar can meet relevant national standard; by the use of the thermal insulation mortar, energy-saving and thermal insulation effects reach 65% and potential quality hazard of an exterior wall insulation system is avoided; the chemical gypsum used is a solid waste, is easily available and has low cost; and by full cyclic utilization of the chemical gypsum, the environment is protected and economic benefit is raised.

Description

A kind of used for building exterior wall energy-saving heat preserving mortar

Technical field

The present invention relates to a kind of used for building exterior wall energy-saving heat preserving mortar and preparation method thereof.A kind of chemical gypsum heat preservation mortar for outer wall and preparation method thereof particularly.

Background technology

Construction industry energy saving building is now to strengthen exterior-wall heat insulation performance to guarantee energy-saving effect.The major way that exterior wall heat-preserving system adopts at present: 1, masonry adopts insulation blocks, beam, post, cold-heat bridge partly adopt thermal insulation mortar or warming plate to form heat-insulation system; 2, masonry is non-insulation blocks, and building exterior wall heat preserving system adopts external thermal insulation system or exterior wall internal insulation system.External thermal insulation system mostly is thermal insulation mortar or warming plate, and exterior wall internal insulation system mostly is thermal insulation mortar.External thermal insulation system is various in style with warming plate, and conventional has: inorganic board composite material thermal insulation plate and cement foaming insulation board, organic plates extruded sheet and styrofoam etc.; The conventional thermal insulation mortar of external thermal insulation system is cement based glass bead or polyphenyl granule exterior wall heat preserving mortar.Above-mentioned these materials in actual application due to the reason of material or the reason of process for processing or the reason of construction, inevitably occur the quality problems such as cracking, hollowing even come off, and the inflammableness of organic materials is brought major safety risks to buildings.Exterior wall internal insulation system adopts gypsum base thermal insulation mortar more, and gypsum base thermal insulation mortar, can not be for exterior wall because of sill characteristic.

Thermal insulation mortar is one of energy saving building exterior wall heat-preserving system main raw, in particular for the cold and hot pontic heat preservation energy-saving of buildings, processes, and has the feature of the low easy construction of cost.The present invention makes it react and be able to modification together with other gelling material under effect at additive chemical gypsum after calcining, and making building materials of gypsum meet water is that the characteristic of powder becomes history.The unit weight of gypsum is generally not more than 880 kilograms, light weight self is to have good thermal insulation property, the thermal insulation mortar gelling material relative quantity of making for main gelling material is large, its stickiness, bonding force, ultimate compression strength, water proof anti-seepage rate obviously improve compared with cement based thermal insulation mortar, have overcome existing exterior wall heat-preserving system hidden danger of quality.For the comprehensive utilization of chemical gypsum, not only can solve the problem of environmental pollution, can make full use of again renewable resource and develop a circular economy, meet national industrial policies.

Summary of the invention

The object of the invention is to propose a kind of used for building exterior wall thermal insulation mortar that gypsum is main gelling material and preparation method thereof of take.Overcome the technical deficiency of existing thermal insulation mortar, after building is used this mortar to do energy-saving heat preserving processing, its energy-saving heat preserving effect reaches 65% national standard, thermal conductivity reaches 0.065w/mk, property indices meets national correlation technique rules specified requirement, has avoided the hidden danger of quality of exterior wall heat-preserving system.

Technical scheme of the present invention is that the abundant mixed dry powder blend material of gelling material and thermal insulation light aggregate adds modification activator and water to stir to make and can whitewash the heat preservation mortar for outer wall of buildings that can spray.Described gelling material is calcining chemical gypsum, flyash, cement, lime, slag, rice husk or straw powder etc.; practical application weight percent is: gypsum 30-50%, flyash 10-30%, cement 5-10%, lime 2-15%, slag 2-10%, glass bead or glass microballon 5-20%, rice husk (stalk) powder 2-10%; wherein: gypsum is calcining chemical gypsum, and rice husk straw powder is through carbonizing treatment.Described light-weight aggregate is: glass bead or glass microballon, practical application weight percent is: glass bead 5-20% or glass microballon 5-20%.Described modification activator is: the mixed solutions such as sodium-chlor, calcium chloride, magnesium oxide, sodium hydroxide, Calucium Silicate powder, potassium sulfate, alum, citric acid, PVC latex powder, practical application weight percent is 3-10%.Modification activator weight percent is: sodium-chlor 10-16%, calcium chloride 16-16%, magnesium oxide 12-14%, sodium hydroxide 12-16%, Calucium Silicate powder 6-10%, potassium sulfate 16-20%, alum 2-6%, citric acid 0.5-2%, PVC latex powder 15-22%.

Making method of the present invention: 1 adds light-weight aggregate fully to stir in stirred vessel described gelling material, forms dry powder premixing mortar.2 insert above-mentioned dry powder premixing mortar while using in mortar mixer, to add after water and modification activator stir and form thermal insulation mortar slurry.3 whitewash above-mentioned thermal insulation mortar slurry or spraying building exterior wall or building flooring are supported and within 2-4 hour, to be completed final set and be heat preservation mortar for outer wall of buildings of the present invention in time.

Case study on implementation:

Case one: calcined phosphogypsum 40 %, flyash 10 %, cement 8 %, lime 6 %, slag 6 %, glass bead 22 %, rice husk (stalk) powder 2 %, modification activator 6 %, ratio of water to material 0.80.

Case two: calcining desulfurated plaster 45 %, flyash 12 %, cement 6 %, lime 3 %, slag 4 %, glass bead 28.2 %, rice husk (stalk) powder 4 %, modification activator 2 %, ratio of water to material 0.75.

Case three: calcining titanium gypsum 48 %, flyash 5 %, cement 7 %, lime 5 %, slag 3 %, glass bead 26 %, rice husk (stalk) powder 2 %, modification activator 4 %, ratio of water to material 0.85.

Case four: calcining fluorgypsum 50 %, flyash 5 %, cement 5 %, lime 8 %, slag 2%, glass bead 23 %, rice husk (stalk) powder 2 %, modification activator 5 %, ratio of water to material 0.85.

Making method: 1, with case proportioning, described gelling material and light-weight aggregate are measured to fully stirring in rearmounted powder stirrer, make premixing dry-mix; While 2, using, premixing dry-mix is added to modification activator and water and put fully stirring in mortar mixer, make thermal insulation mortar slurry; 3, thermal insulation mortar slurry is whitewashed or be sprayed at skin or flooring in time, maintenance 2-4 hour completes after final set.

Claims

1. a used for building exterior wall energy-saving heat preserving mortar is mainly in gelling material, to add thermal insulation light aggregate and water mixes; It is characterized in that under the effect of property-modifying additive, mixing in enormous quantities in gelling material chemical gypsum; Each component per-cent is: gelling material 60%-70 %, thermal insulation light aggregate 15%-35%, modification activator 3 %-9 %, ratio of water to material 0.7-0.85.

2. by heat preservation mortar for outer wall described in claim, it is characterized in that described gelling material is comprised of gypsum, flyash, cement, lime, slag, each component weight percent is gypsum 30%-50%, flyash 10 %-30 %, cement 5 %-10 %, lime 2%-11 %, slag 2%-10 %.

3. by heat preservation mortar for outer wall described in claim, it is characterized in that described thermal insulation light aggregate is that glass bead or glass microballon add rice husk (stalk) powder, each component weight percent is glass bead or glass microballon 5 %-20 %, rice husk (stalk) powder 2%-10 %.

4. by heat preservation mortar for outer wall described in claim 1, it is characterized in that described modification activator forms mixed solution by sodium-chlor, calcium chloride, magnesium oxide, sodium hydroxide, Calucium Silicate powder, potassium sulfate, alum, citric acid, PVC latex powder etc.; Each component weight percent is: sodium-chlor 10-16%, calcium chloride 16-16%, magnesium oxide 12-14%, sodium hydroxide 12-16%, Calucium Silicate powder 6-10%, potassium sulfate 16-20%, alum 2-6%, citric acid 0.5-2%, PVC latex powder 15-22%.