CN104513049A

CN104513049A - Fly ash brick and preparation method thereof

Info

Publication number: CN104513049A
Application number: CN201310474302.8A
Authority: CN
Inventors: 付德斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-30
Filing date: 2013-09-30
Publication date: 2015-04-15

Abstract

The present invention relates to a non sintered fly ash brick and a preparation method thereof. The non sintered fly ash brick in the prior art is prepared from fly ash, lime and gypsum as raw materials, and is low in strength and small in fly ash mixing amount. The non sintered fly ash brick comprises, by weight, 75-90% of fly ash, 4-12% of lime, 3-7% of gypsum, 3-12% of cement and 8-20% of water. After a green brick is made, the green brick is placed in an open space, is covered with a layer of transparent material, and can be cured by solar energy.

Description

A kind of flyash brick and preparation method thereof

The invention belongs to a kind of building wall material and preparation method thereof, more particularly relate to a kind of sintering-free flyash brick and manufacture method thereof.

The kind of flyash brick is a lot, as aerating flyash brick, and steam-cured fly ash brick, fired fly ash brick and sintering-free flyash brick etc." lime-flyash one gypsum brick " of current India batch production, its formulation by weight is 1 part, gypsum, 5 parts, lime, 125 parts, flyash, will be mixed in proportion after raw material pulverizing and the stirring that adds water, again the material of mixing is pressed into adobe, then showering curing about month, i.e. obtained finished bricks, its shortcoming is fly-ash-contained less in brick, ultimate compression strength is low, usually only has 40K g/c m ², be difficult to the needs meeting building constructions.

The object of the invention is to manufacture a kind of sintering-free flyash brick, improve the incorporation of flyash in flyash brick, according to the actual needs of construction work, produce the sintering-free flyash brick of the different labels such as No. 50, No. 75, No. 100, No. 150, No. 200.

Technical scheme of the present invention is as follows:

The present invention prepares flyash brick, with flyash, lime, gypsum for main raw material, adds cement, mixing and stirring, then the stirring that adds water, and adobe is made in punching press, then is finished product through maintenance.Proportioning raw materials of the present invention (by weight) is flyash 75 ~ 90%, lime 4 ~ 12%, gypsum 3 ~ 7%, cement 3 ~ 12%.After being mixed by raw material by said ratio, add water stirring, and amount of water is 8 ~ 20% of raw material gross weight, in whipping process, need stop for some time, so that material ageing, and digestion time 2 ~ 4 hours.After adobe is made, move to open area, cover one deck light transmissive material, be not less than the condition of 10 DEG C at temperature under, keep adobe moistening, utilize solar energy curing 8 ~ 45 days.

Flyash selected by the present invention, wherein silica content is not less than 35%, and alumina content is not less than 20%, and loss on ignition is not more than 15%, screen over-size (4900 holes/c m ², be not more than 35%, gypsum, lime all need to pulverize, and granularity is greater than 120 orders.In burning-free flyash brick, aggregate weigh content is not more than 10%, and aggregate can be stone, sand or calculon grain, particle diameter 02 ~ 07m m.The present invention prepares sintering-free flyash brick, and along with temperature is different, required curing time is also different.When temperature is 10 ~ 18 DEG C, need maintenance 28 ~ 45 days; When temperature is 18 ~ 30 DEG C, need maintenance 15 ~ 28 days; When temperature more than 30 DEG C, need maintenance 8 ~ 15 days.

It is simple that the present invention prepares sintering-free flyash brick technique, do not need to consume a large amount of coals, and save energy, pollution-free, working condition is better.Finished bricks surface not dusting, does not chap, and the incorporation of flyash can reach 90%, economizes soil and protects ground.According to user's needs, the sintering-free flyash brick of the different labels such as No. 50, No. 75, No. 100, No. 150, No. 200 can be produced.

Below in conjunction with embodiment, the invention will be further described.

Embodiment 1:

Select flyash 90%, lime 4%, gypsum 3%, cement 3%, after mixing, add water and stir, stop stirring, by material ageing 2 hours, and then stir 5 minutes.Amount of water is 15% of material gross weight, and in flyash, silica content is 54%, and alumina content is 30%, calcium oxide content is 3%, and ferric oxide content is 5%, content of magnesia 1%, all the other 1%, loss on ignition 6%, the screen over-size (4900 holes/c m of flyash ²sieve) be not more than 35%, after crushed, sieved through No. 130 sieve sieves, granularity is 130 orders for lime, gypsum.Aggregate selects particle diameter to be the handstone of 02 ~ 07m m.Material after mixing is struck out adobe with 60 tons of punching press brick presss, then adobe is moved to open area, covering one deck agricultural mulching, is under the condition of 20 ~ 25 DEG C at temperature, keeps adobe moistening, utilizes sun power to maintain and protects 18 days, be finished product.Through material of construction quality testing department sampling Detection, with reference to J C239-77 promulgated by the ministries or commissions of the Central Government flyash brick standard, quality product reaches the quality index of No. 75 flyash bricks.Detected result: ultimate compression strength 82K g/c m ²(standard value 75K g/c m ²), folding strength 18K g/c m2 (standard value 15K g/cm ²), physical dimension deviation is not more than ± 3m m, and after 15 freezing and thawing tests, the damage area on bar face is not more than 25c m ².Lime blowing is pressed, " Anhui Province's carbonated lime brick standard " test, 5 pieces of test specimens all without point of burst, resistance to compression freeze after rate of loss be 22%.

Embodiment 2:

Adopt flyash 76%, lime 12%, gypsum 3%, cement 4%, sand 5%, add water mixing and stirring, stops stirring, and by material ageing 35 hours, then stirs 10 minutes.Amount of water is 12% of material gross weight, and the quality index of flyash, lime, gypsum, granularity are all with embodiment 1.Material after mixing is struck out adobe through 60 tons of punching press brick presss, then moves to open area, cover one deck agricultural mulching, temperature is 30 ~ 35 DEG C, keeps adobe moistening, utilizes solar energy curing within 10 days, to be finished product.160K g/cm is reached through sampling Detection burning-free flyash brick ultimate compression strength ², folding strength is 27K g/cm ², physical dimension deviation is not more than ± 3m m, and quality product reaches the quality standard about No. 150 flyash bricks in the standard of JC239-77 promulgated by the ministries or commissions of the Central Government.Lime blowing by " Anhui Province's carbonated lime brick standard " test, 5 pieces of test specimens all without point of burst, resistance to compression freeze after rate of loss be 32%.

Embodiment 3:

Select flyash 80%, lime 4%, gypsum 4%, cement 12%, add water mixing and stirring, and ageing after 3 hours, then continues stirring 13 minutes, amount of water is 20% of material gross weight, and the quality index of flyash, screen over-size, loss on ignition are all with embodiment 1, and lime, gypsum granularity are 150 orders.The material of mixing is made adobe with the punching press of 60 tons of punching press brick presss, then adobe is moved to open area, cover one deck agricultural mulching, temperature is 18 ~ 20 DEG C, every 10 days water sprays once, keeps adobe moistening, utilizes solar energy curing within 28 days, to be finished product.Through sampling Detection, sintering-free flyash brick ultimate compression strength reaches 116K g/c m ², folding strength reaches 23K g/c m ², physical dimension deviation is not more than ± 3m m, and anti-freezing property is qualified, and quality product meets the quality standard about No. 100 flyash bricks in the flyash brick standard of J C239-77 promulgated by the ministries or commissions of the Central Government.Lime blast test method with embodiment 1,5 pieces of test specimens all without point of burst, resistance to compression freeze after rate of loss be 27%.

Embodiment 4:

Select flyash 75%, lime 4%, gypsum 7%, cement 12%, sand 2%, adds water and mixes, and amount of water is 8% of material gross weight.Stop stirring, by material ageing 4 hours, then stir 5 minutes.In flyash, each component content is with embodiment 1, loss on ignition 559%, screen over-size (4900 holes/cm ²sieve) be less than 18%, lime, gypsum granularity 130 order, mixed material is made adobe through the punching press of 60 tons of punching press brick presss, then moves to open area, cover layer of plastic film, temperature is 32 ~ 38 DEG C, utilize solar energy curing 15 days, every day to adobe water spray once, keeps adobe surface moisture, after testing, sintering-free flyash brick ultimate compression strength reaches 208K g/c m ², folding strength is 41K g/cm ², physical dimension deviation ± 15mm, anti-freezing property is qualified.

All by weight, covering adobe also can with other light transmissive materials such as sheet glass for component content mentioned in the embodiment of the present invention.

Claims

1. a sintering-free flyash brick, by flyash, gypsum, lime and cement, additional suitable quantity of water composition, its symbol is levied and is that the weight proportion of each component is:

Flyash 75 ~ 90%, lime 4 ~ 12%,

Gypsum 3 ~ 7%, cement 3 ~ 12%,

External adding water 8 ~ 20%.

In described flyash, silicon oxide weight percentage is not less than 35%, and the weight percentage of aluminum oxide is not less than 20%, and loss on ignition is not more than 15%.

2. a kind of sintering-free flyash brick according to claim 1, is characterized in that wherein aggregate weigh content is not more than 10%, and described aggregate is stone, sand or calculon grain, particle diameter 02 ~ 07m m.

3. the non-sintered fine coal brick of one according to claim 1, is characterized in that the screen over-size (4900 holes/c m of flyash ²sieve) be not more than 35%, gypsum, lime granularity are greater than 120 orders, and cement mark is not less than No. 425.

4. the preparation method of a kind of flyash brick according to claim 1, comprises batching, and add water the steps such as stirring, impact briquetting and finished product maintenance, it is characterized in that material ageing 2 ~ 4 hours in whipping process; Adobe moves to open area after making, and covers one deck light transmissive material, under being not less than the condition of 10 DEG C, keeping adobe moistening, utilizes solar energy curing 8 ~ 45 days at temperature.