CN1775707A - Light thermal in sulating block composition and its preparing method - Google Patents

Abstract

The invention relates to a lightweight thermal insulating brick combination and its making method, and the combination contains the components in weight shares: stalks of sectional herbs or crops 20%-45%, mixture of light burned magnesia and magnesium chloride 50%-75%, and additive 2%-5%, and the invention first mixes the additive and magnesium chloride solution of a certain concentration, and then makes mixing and blending procedures to make the bricks, which can effectively realize thermal insulation and reduce their own weights, thus able to reduce the cost and prevent the bricks going moldy and being verminous.

Description

Light thermal in sulating block composition and preparation method thereof

Technical field:

The present invention relates to a kind of be used to the make composition of light heat insulation blocks and the method for making building block of said composition.

Background technology:

Traditional building block that is used to build by laying bricks or stones buildings or structures normally is made of common brick, and common brick needs with high-quality soil in making processes is raw material, and makes by sintering, so, baking red bricks not only destroys land resources, also causes problems such as waste of coal equal energy source and environmental pollution; In addition, because traditional common brick is not considered the insulation problem, so this kind common brick all adopts solid structure, and quality is bigger, also can increase the difficulty of building operation when not reaching fine heat insulation effect.

" the polystyrene foamed sandwich brick " of No. 2364110 bulletins of Chinese patent is exactly a solution that proposes at the problems referred to above.The sandwich brick that this patent proposed is to adopt material such as flyash and by exempting from the brick that the agglomerating method is made, and utilizes this dual mode of benzene plate that is arranged on the vertical core on this brick and is installed in the vertical core to realize insulation.Though this sandwich brick can solve the insulation of traditional common brick and problem such as waste energy, but, there is not heat-insulating property owing to constitute this kind sandwich brick material of main part, with its masonry panel the time, the contacted position of brick and brick always exists and is not incubated benzene plate and hollow position, promptly at architectural alleged " cold bridge ", and cold bridge can't be realized whole wall thermal insulating, even it also can only be to dwindle cold bridge that the profile of brick adopts inserting mode or other structure formation limitedly, but, cold bridge can not be eliminated fully.

For this reason, Chinese patent has been announced the technology of " a kind of light-weight hollow building block made " for No. 1105652.Holllow building block that this patent proposed with wood sawdust, pulverize straw or plant stem chip as charges, and with its with by ground silica or magnesium oxide and magnesium chloride etc. as aggregate, with the charges chip with make holllow building block after aggregate mixes.Its meaning is to want to utilize charges such as wood sawdust, pulverizing straw to realize insulation, can also reduce the cost of manufacture of building block simultaneously and alleviate the weight of self.But owing to wood sawdust, pulverize charges such as straw after being ground into the smalls shape, its heat-insulating property can reduce greatly, and simultaneously, infested because of the easy moldy metamorphism of above-mentioned charges, and this patent does not provide the mouldy and infested measure of any prevention.

In addition, Chinese patent has also been announced a kind of name for No. 1473693 and has been called " making method of light concrete hollow block brick ".This patent is rape straw, straw etc. to be combined as starting material and with concrete be made into hollow block brick.From the content of this patent disclosure as can be seen, the use length of raw materials such as its rape straw, straw is between 5-10mm, and raw materials such as the rape straw in this length range, straw do not reach the ideal heat insulation effect equally, and this patent does not provide the mouldy infested any technology enlightenment of prevention equally, the usage quantity of raw materials such as rape straw, straw is no more than 50% simultaneously, and its consumption is less relatively.

Summary of the invention:

Task of the present invention provides the bar of a kind of plant of the section of utilization nodular or farm crop and realizes insulation and utilize the mode weight reduction that strengthens its usage quantity, can prevent the composition of its mouldy infested light heat insulation blocks simultaneously again.

Another task of the present invention provides a kind of method that is used to make above-mentioned composition.

Light thermal in sulating block composition proposed by the invention, composition that it contains and weight quota are: the bar of section nodular herbaceous plant or farm crop is 20%--45%, and magnesia unslacked and magnesium chloride mixture are 50%--75%, and additive is 2%--5%.Because the bar itself of plant or farm crop just has heat-insulating property, and lighter weight; And additive can be made of dispersion agent and sterilizing agent or tensio-active agent, and it can the section of making nodular herbaceous plant or the bars of farm crop and magnesia unslacked and magnesium chloride uniform mixing fully, and magnesium chloride can also prevent effectively that building block is mouldy infested simultaneously.Magnesia unslacked is light magnesium oxide, is dissolved in acid and ammonium salt solution, mixes with magnesium chloride solution easy gelling to harden, and this mixture mixes rigidity or the supporting capacity that the sclerosis of gelling again is enough to guarantee building block with section nodular plant or farm crop.

The content of magnesium is greater than 80% in the described magnesia unslacked, and the content of magnesium is greater than 45% in the magnesium chloride, and the weight ratio between magnesia unslacked and the magnesium chloride is 1: 0.2-0.4.

Described additive comprises poly alkyl alcohol ethene (n) ether and dilute sulphuric acid, and wherein, n is less than 18 or greater than 12, the positive integer less than 18.Poly alkyl alcohol ethene (n) ether is commonly called as peregal, it is a kind of nonionogenic tenside, hydrophilic radical in the molecule is the Soxylat A 25-7 chain, have extremely strong water-soluble, also have performances such as good wetting, emulsification and dispersion simultaneously, and nontoxic, adding this additive in this building block mainly is to utilize above-mentioned performance.

Described additive also comprises by magnesium oxide and water, and the pH value of sulfuric acid preparation is between 6.5 to 7.5 or the pH value neutralizer that equals 7.

Described additive also comprises the dispersion agent that is made of calcium lignin sulphonate and by being the water reducer that major ingredient constitutes with β-tea sodium iodate.Calcium lignin sulphonate is a kind of polycomponent high molecular polymer anion surfactant, has very strong dispersiveness, cohesiveness; And water reducer proposed by the invention be a kind of be the high efficiency water reducing agent that main component constitutes with β-tea sodium iodate, its sodium sulphate content is lower than 5%, its water-reducing rate can be brought up to more than 18%.

The weight quota that described additive contains each composition is respectively: water reducer 5%--15%, poly alkyl alcohol ethene (n) ether 2%--10%, dispersion agent 0.5%--5%, neutralizer 70%--90%.The composition that contains β-tea sodium iodate in the described water reducer is between 10% to 30%.Described poly alkyl alcohol ethene (n) ether is the aqueous solution, and its purity is between 20% to 40%.

Method with above-mentioned composition is made light heat insulation blocks comprises the following steps:

At first be cut to length Duan Jie between 1 to 3 centimetre behind the bar natural air drying with herbaceous plant or farm crop, then the magnesium chloride water is modulated into the diluting soln of ripple magnesium degree between 22 ° to 27 °, press the pre-determined quantity additive preparation again, at last with the additive and the magnesium oxide that prepare, and section nodular bar predetermined amounts adds in the magnesium chloride solution successively, and stir while adding, until above-mentioned each material add and thorough mixing after more mixed material is put into mould and makes light heat insulation blocks through natural reaction or by compacting step.

When additive preparation, also comprise water reducer and poly alkyl alcohol ethene (n) ether with the water-reducible step more than 80 ℃.

The bar of herbaceous plant or farm crop, particularly the straw of farm crop such as corn is the waste of prior art intractable, and adopt volume to reach herbaceous plant more than 80% or the bar of farm crop in the composition proposed by the invention, the building block of making of said composition can realize being incubated and alleviating the weight of self effectively, and reduce very big cost, simultaneously by magnesia unslacked and magnesium chloride, and the combination of additive can also guarantee that building block has stronger rigidity and supporting capacity, particularly contain water reducer in the additive, composition such as dispersion agent and sulfuric acid, magnesia unslacked and magnesium chloride can prevent that again building block is mouldy infested so that can organically combine with section nodular bar.

Embodiment:

Embodiment 1:

Get dried corn or sorghum straw bar or grass stalk and be cut to the section nodular of length between 1 to 3 centimetre, 45Kg is stand-by for the section of taking by weighing nodular straw.Additive preparation then is that dilute sulphuric acid that 2% the dilute sulphuric acid or the vitriol oil obtain behind thin up mixes with magnesium oxide and it added to be mixed with pH value be 7 neutralizer with concentration, takes by weighing this neutralizer 4.5Kg then; Dilute water reducer with boiling water again, to make its content be 10% and take by weighing 0.35Kg, and equally with boiling water dilution poly alkyl alcohol ethene (15) ether, to make its content be 40% and take by weighing 0.1Kg, takes by weighing dispersion agent 0.05Kg simultaneously.Enter combination process at last, take by weighing magnesium chloride 15Kg and water and be modulated into the solution of ripple magnesium degree about 26 °, this solution is put into container, the additive that in this container, adds above-mentioned preparation and take by weighing then, taking by weighing magnesia unslacked 35Kg again puts into container and the mixture of container is fully stirred, treat that material presents and the straw of well cutting is put into container after thick and fully stir again and just make composition proposed by the invention, to mix the back composition and be respectively charged in the ready-formed mould, and treat promptly to can be made into building block behind its natural reaction.

Embodiment 2:

Producing corn or sorghum straw bar or straw section nodular bar 20Kg and preparation pH value according to the method for embodiment 1 is neutralizer between 6.5 to 7.5, take by weighing this neutralizer 3.5Kg then, and with the content of boiling water dilution 10% water reducer 0.75Kg, be diluted to content and be 40% poly alkyl alcohol ethene (15 or 12) ether 0.5Kg, take by weighing dispersion agent 0.25Kg, and the magnesium chloride water of 13Kg is modulated into the solution of ripple magnesium degree about 22 ° puts into container, the additive that in this container, adds above-mentioned preparation and take by weighing then, take by weighing magnesium oxide or magnesia unslacked 62Kg again and put into the method stirring of container according to embodiment 1, the dress mould is made building block at last.

Embodiment 3:

Producing corn or sorghum straw bar or straw section nodular bar 30Kg and preparation pH value according to the method for embodiment 1 is 7.5 neutralizer, take by weighing this neutralizer 1.6Kg then, and with the content of boiling water dilution 10% water reducer 0.2Kg, be diluted to content and be 40% poly alkyl alcohol ethene (15 or 12) ether 0.16Kg, take by weighing dispersion agent 0.04Kg, and the magnesium chloride water of 16Kg is modulated into the solution of ripple magnesium degree about 27 ° puts into container, the additive that in this container, adds above-mentioned preparation and take by weighing then, take by weighing magnesium oxide or magnesia unslacked 52Kg again and put into method stirring and the dress mould of container, make building block at last according to embodiment 1.

Embodiment 4:

Producing corn or sorghum straw bar or straw section nodular bar 37Kg and preparation pH value according to the method for embodiment 1 is 6.5 neutralizer, take by weighing this neutralizer 2.25Kg then, and with the content of boiling water dilution 10% water reducer 0.3Kg, be diluted to content and be 40% poly alkyl alcohol ethene (15 or 12) ether 0.3Kg, take by weighing dispersion agent 0.15Kg, and the magnesium chloride water of 10Kg is modulated into the solution of ripple magnesium degree about 27 ° puts into container, the additive that in this container, adds above-mentioned preparation and take by weighing then, take by weighing magnesium oxide or magnesia unslacked 50Kg again and put into method stirring and the dress mould of container, make building block at last according to embodiment 1.

Embodiment 5:

Producing corn or sorghum straw bar or straw section nodular bar 38Kg and preparation pH value according to the method for embodiment 1 is 7 neutralizer, take by weighing this neutralizer 2.7Kg then, and with the content of boiling water dilution 10% water reducer 0.2Kg, be diluted to content and be 40% poly alkyl alcohol ethene (15 or 12) ether 0.08Kg, take by weighing dispersion agent 0.02Kg, and the magnesium chloride water of 11Kg is modulated into the solution of ripple magnesium degree about 27 ° puts into container, the additive that in this container, adds above-mentioned preparation and take by weighing then, take by weighing magnesium oxide or magnesia unslacked 48Kg again and put into method stirring and the dress mould of container, make building block at last according to embodiment 1.

Claims (10)

1, light thermal in sulating block composition is characterized in that: composition that contains in the said composition and weight quota are: the bar of section nodular herbaceous plant or farm crop is 20%--45%, and magnesia unslacked and magnesium chloride mixture are 50%--75%, and additive is 2%--5%.

2, composition according to claim 1 is characterized in that: the content of magnesium is greater than 80% in the described magnesia unslacked, and the content of magnesium is greater than 45% in the magnesium chloride, and the weight ratio between magnesia unslacked and the magnesium chloride is 1: 0.2-0.4.

3, composition according to claim 1 is characterized in that: described additive comprises poly alkyl alcohol ethene (n) ether, and wherein, n is less than 18 or greater than 12, the positive integer less than 18.

4, composition according to claim 1 is characterized in that: described additive also comprises by magnesium oxide and water, and the pH value of sulfuric acid preparation is between 6.5 to 7.5 or the pH value neutralizer that equals 7.

5, composition according to claim 1 is characterized in that: described additive also comprises the dispersion agent that is made of calcium lignin sulphonate and by being the water reducer that major ingredient constitutes with β-tea sodium iodate.

6, according to claim 1 or 3 or 4 or 5 described compositions, it is characterized in that: the weight quota that described additive contains each composition is respectively: water reducer 5%--15%, poly alkyl alcohol ethene (n) ether 2%--10%, dispersion agent 0.5%--5%, neutralizer 70%--90%.

7, composition according to claim 6 is characterized in that: the composition that contains β-tea sodium iodate in the described water reducer is between 10% to 30%.

8, composition according to claim 6 is characterized in that: described poly alkyl alcohol ethene (n) ether is the aqueous solution, and its purity is between 20% to 40%.

9, the method for making light heat insulation blocks according to the described composition of claim 1 to 8 is characterized in that comprising the following steps:

At first be cut to length Duan Jie between 1 to 3 centimetre behind the bar natural air drying with herbaceous plant or farm crop, then the magnesium chloride water is modulated into the diluting soln of ripple magnesium degree between 22 ° to 27 °, press the pre-determined quantity additive preparation again, at last with the additive and the magnesium oxide that prepare, and section nodular bar predetermined amounts adds in the magnesium chloride solution successively, and stir while adding, until above-mentioned each material add and thorough mixing after more mixed material is put into mould and makes light heat insulation blocks through natural reaction or by compacting step.

10, method according to claim 9 is characterized in that: also comprise when additive preparation water reducer and poly alkyl alcohol ethene (n) ether with the water-reducible step more than 80 ℃.