CN105271862A - Anti-cracking additive - Google Patents

Abstract

The invention provides an anti-cracking additive. The anti-cracking additive is prepared from 40-70% of slag powder, 10-20% of silicon powder, 5-15% of iron powder, 3-8% of aluminum powder, 5-15% of quartz powder, 1-3% of Danqiangsi, 1-3% of glass fiber and 3-8% of expanding agents. In external wall surface paint of buildings, temperature-fluctuation-resistant tests show that coatings are free of spalling, bubbling, cracking and obvious color changes and the water permeability of coatings is 0.5 mL; meanwhile, impact-resistant tests show that coatings are free of cracking, spalling and obvious deformation; in addition, waste slag serves as the main raw material of the anti-cracking additive, cost is low, the industrial waste, namely, slag, can be effectively recycled and comprehensively utilized, waste can be turned into wealth, and the severe problems that when slag is stacked, the occupied area is large and the environment is polluted are fundamentally solved.

Description

A kind of anticracking additive

Technical field

The present invention relates to a kind of additive, especially a kind of anticracking additive on the external walls such as concrete, putty, mortar.

Background technology

For increasing decorating building effect, protection materials for wall, usually will outside the building wall making cement screed or putty layer.Because the surperficial material of construction such as sand-cement slurry, putty can produce be full of cracks because the coefficient of expansion of aquation drying shrinkage, differing materials is not equal mutually, thus cause done top coat to occur crackle, and once there be crackle, not only affect facade, more seriously can cause rain leakage because of crack, thus affect the interior finish of buildings.Therefore, top coat cracking is the problem that building trade is difficult to break through always, for overcoming building surface cracking, though people have developed different materials, as flexible and elastic break-preventing putty etc., but still there is the problems such as cost is high, effect of anti-cracking is not good, and fundamentally do not solve skin topcoating---the problem of cement sand bed or putty layer cracking.In addition, the industrial waste slag such as the lead zinc after smelting, Copper Slag, Iron-ore Slag, major part is all to stack formal layout, small part is only had to be recovered utilization, and recycling amount is quite limited, not only take limited land resources, and long-term stacking will bring environmental pollution to stacking.Therefore, must be improved prior art.

Summary of the invention

For overcoming skin topcoating---the problem of the cracking such as cement sand bed or putty layer, the invention provides a kind of anticracking additive.

The present invention is to provide so a kind of anticracking additive, it is characterized in that component is:

Slag powders 40 ~ 70%;

Silica flour 10 ~ 20%;

Iron powder 5 ~ 15%;

Aluminium powder 3 ~ 8%;

Silica powder 5 ~ 15%;

Red strong silk 1 ~ 3%;

Glass fibre 1 ~ 3%;

Swelling agent 3 ~ 8%.

Slag powders is lead zinc after smelting, Copper Slag, one or more in Iron-ore Slag, and is broken into 200 object fine powders.

Silica flour, iron powder, aluminium powder, silica powder, red strong silk, glass fibre, swelling agent are commercial products.

Anticracking additive provided by the invention obtains through following method: by above-mentioned slag powders, silica flour, iron powder, aluminium powder, silica powder, red strong silk, glass fibre, swelling agent mixing and stirring, obtain anticracking additive product.

By anticracking additive: the mass ratio of skin topcoating=1:4 ~ 6, by anticracking additive of the present invention with addition of in skin topcoating, can effectively prevent skin topcoating from ftractureing.

The present invention has following advantages and effect: adopt such scheme, the anticracking additive of the present invention is made to have stronger anti-crack function, when in the exterior wall surface coating at buildings, as sand-cement slurry, putty etc., after allocating the present invention into, the drying of coating initial stage does not produce any crackle, cohesive strength is greater than 0.5MPa, coating is tested through temperature-change resistance, do not peel off, non-foaming, flawless, without obvious variable color, coating water-permeable is 0.5mL, coating is through impulse withstand test simultaneously, flawless, without peeling off, obviously be not out of shape, in addition, main raw material of the present invention is discarded slag, not only cost is low, and can efficient recovery fully utilize this trade waste of slag, make it to turn waste into wealth, fundamentally solving slag, to stack the floor space brought large, the serious problems such as contaminate environment.

Embodiment

Below in conjunction with embodiment, the present invention is described further.

Embodiment 1

By 200 object Pb-Zn deposits ground-slag 40 kilograms, and commercial silica flour 15 kilograms, iron powder 15 kilograms, aluminium powder 3 kilograms, silica powder 15 kilograms, red strong silk 1 kilogram, 3 kilograms, glass fibre, after swelling agent 8 kilograms of mixing and stirring, obtains anticracking additive.

During use, by anticracking additive: the mass ratio of sand-cement slurry=1:4, by anticracking additive of the present invention with addition of in sand-cement slurry, can effectively prevent skin sand-cement slurry from ftractureing.

Embodiment 2

By 200 object copper mine ground-slag 20 kilograms, Pb-Zn deposits ground-slag 43 kilograms, and commercial silica flour 10 kilograms, iron powder 5 kilograms, aluminium powder 3 kilograms, silica powder 5 kilograms, red strong silk 3 kilograms, 3 kilograms, glass fibre, after swelling agent 8 kilograms of mixing and stirring, obtains anticracking additive.

During use, by anticracking additive: the mass ratio of sand-cement slurry=1:5, by anticracking additive of the present invention with addition of in sand-cement slurry, can effectively prevent skin sand-cement slurry from ftractureing.

Embodiment 3

By 200 object Pb-Zn deposits ground-slag 20 kilograms, copper mine ground-slag 10 kilograms, iron ore ground-slag 16 kilograms, and commercial silica flour 20 kilograms, iron powder 10 kilograms, aluminium powder 5 kilograms, silica powder 10 kilograms, red strong silk 2 kilograms, 2 kilograms, glass fibre, after swelling agent 5 kilograms of mixing and stirring, obtains anticracking additive.

During use, by anticracking additive: the mass ratio of putty powder=1:6, by anticracking additive of the present invention with addition of in putty powder, can effectively prevent skin putty from ftractureing.

Embodiment 4

By 200 object copper mine ground-slag 20 kilograms, iron ore ground-slag 20 kilograms, silica flour 20 kilograms, iron powder 7 kilograms, aluminium powder 8 kilograms, silica powder 15 kilograms, red strong silk 3 kilograms, 1 kilogram, glass fibre, after swelling agent 6 kilograms of mixing and stirring, obtains anticracking additive

During use, by anticracking additive: the mass ratio of putty powder=1:5, by anticracking additive of the present invention with addition of in putty powder, can effectively prevent skin putty from ftractureing.

Claims (1)

1. an anticracking additive, is characterized in that, is made up of the raw material of following mass percent:

Slag powders 40 ~ 70%;

Silica flour 10 ~ 20%;

Iron powder 5 ~ 15%;

Aluminium powder 3 ~ 8%;

Silica powder 5 ~ 15%;

Red strong silk 1 ~ 3%;

Glass fibre 1 ~ 3%;

Swelling agent 3 ~ 8%;

Described slag powders is lead zinc after smelting, Copper Slag, one or more in Iron-ore Slag.

Described slag powders was broken into 200 object fine powders.