CN1270994C - Fly ash concrete light weight multi-porous ribbon board and manufacturing method thereof - Google Patents

Abstract

The present invention discloses a fly ash concrete light weight multi-porous ribbon board and a manufacturing method thereof. The present invention aims to solve the problems of shrinkage cracks, unstable atmosphere and the like which are easily generated by the existing board. The present invention has the technical scheme that the fly ash concrete light weight multi-porous ribbon board of a concrete mixed material which contains cement, fly ash, lime, sand and light aggregate is characterized in that the ratio of effective CaO and SiO2 in the mixed material is equal to 0.25 to 0.45. The method comprises the necessary step of the extrusion forming and the mould forming of a conventional board. The method is characterized in that activating treatment and the extrusion or the casting forming of matched steel bars are additionally added, and the step of secondary steam pressurization and maintenance is carried out on the basis of natural maintenance or steam maintenance. The kettle outlet strength of the product exceeds 28 day strength level specified by the standard of an ordinary industrial waste concrete light weight hollow ribbon board, and shrinkage ratio is obviously reduced. The present invention has the advantages of use quantity enlargement of industrial waste, maintenance time shortening and cost reduction. The fly ash concrete light weight multi-porous ribbon board and the manufacturing method are good for environmental protection.

Description

Light porous batten of fly ash concrete and manufacture method thereof

Technical field

The present invention relates to a kind of light porous batten, specifically relate to light porous batten of a kind of fly ash concrete and manufacture method thereof, belong to novel building sheet material field.

Background technology

Light hollow partition wall battens such as existing industrial residue concrete all are to be gelling material with cement, flyash is adulterant, mix becomes concrete mixed material, through screw extrusion or vertical cassette form moulding slab, forms product strength under normal temperature natural curing or 90 ℃～100 ℃ common steam curings.Its material proportioning is on traditional experiential basis, and according to the theory of strength design of preparing burden, and proportioning is adjusted in the requirement of reference plane density; The hydrated product that forms in goods mainly is relatively poor CSH gel of degree of crystallinity and Ca (OH) ₂Crystal constitutes the cement products structural strength; Though contain more SiO in the flyash ₂And Al ₂O ₃, but under normal temperature or 100 ℃ of vapor cure conditions with cement in Ca (OH) ₂Effect just generates the higher vigorous mullite class hydrated product of CSH (B) holder of the relatively poor basicity of degree of crystallinity.The C that they are all high than degree of crystallinity ₄S ₅H ₅Hold in the palm that vigorous mullite class hydrated product intensity is low, shrinkage value is big, wherein Ca (OH) ₂Crystallization intensity is minimum, only is 1～2% of the vigorous mullite class hydrated product intensity of holder.Light porous battens such as obvious general industry lime-ash are than containing the high C of mass crystallization degree ₄S ₅H ₅Ask the product strength of vigorous mullite class hydrated product low, shrinkage value is big.In light hollow slats such as general industry lime-ash concrete, often add cement for improving product strength, add flyash and pearlstone for pursuing " lightweight ", thereby cause the sheet material drying shrinkage value to strengthen, its weather resistance and air stability are poor, not only cement consumption is bigger, and in use, sheet material is easy to generate shrinkage crack, hollowing takes place, come off, expansion, buckling deformation also can occur, even phenomenons such as horizontal or longitudinal fracture can occur, greatly influence construction quality and caused serious potential safety hazard.

The solid batten of existing aerating concrete is to be mixed with whipping agent in starting material, and with the mobile slip casting moulding of big water cement ratio, early stage non-structure intensity, though under steam press maintenance, also can generate the vigorous mullite class hydrated product of holder, but owing to be the non-closely knit concrete of vesicular structure, the sheet material concrete strength is very low, has only about 2.5～5MPa; For China's fly ash aeroconcretes plate, also because the temperature and pressure of steam press maintenance is on the low side, all≤and 175 ℃, 10MPa pressure, generate the higher C of degree of crystallinity ₄S ₅H ₅Ask vigorous mullite and water garnet class hydrated product less, cause big, the anti-charing poor performance of shrinkage value, sheet material very easily produces shrinkage crack.

Summary of the invention

The purpose of this invention is to provide a kind of traditional fly ash concrete material fiting ratio design that changes, as main gelling material, it is good to make the intensity height, shrinkage value is low and reaches anti-charing performance with flyash, is difficult for producing the light porous batten of fissured fly ash concrete.

To achieve these goals, the present invention adopts following technical scheme: the light porous batten of a kind of fly ash concrete, it is a main raw material with flyash, ashes, and includes cement, lime, gypsum, sand and light skeletal and be made at interior concrete mixed material.It is characterized in that: effective SiO in effective CaO and the flyash in the lime of described compound and the cement ₂Ratio C/S=0.25～0.45.It is different with conventional proportioning be with flyash and lime as the main ingredient of gelling material, account for compound 60～70%; Cement and gypsum addition just play guarantee effect to early stage lifting of slab and carrying intensity.Described concrete mixed material proportioning (weight percent) is: cement 10～23%, lime 4～20%, flyash 40～65%; Sand 10～30%, light skeletal 0～15%, gypsum are 0～10% of cement mixing content.

Described light skeletal is a kind of in slag, float stone or the haydite, the maximum particle diameter≤8mm of slag, float stone or haydite.

When the light skeletal add-on was zero in the described compound, the volume of sand was 10～30%; When the light skeletal add-on was 10～15%, the volume of sand was 10～20%; The effective SiO of flyash in the described raw material ₂Content is lower than at 40% o'clock, needs the admixture fine quartz sand, and its admixture fine quartz sand amount is 15～20% of a described flyash add-on.

To achieve these goals, the present invention provides the manufacture method of the light porous batten of above-mentioned fly ash concrete simultaneously, comprises the conventional extrusion molding or the steps necessary of pouring forming technology, it is characterized in that: comprise effective CaO and effective SiO in the former compound ₂Ratio range be controlled at 0.25～0.45 step, compound stirs after the step of the step of activation treatment, configuration reinforcement extrusion molding or vertical cassette form moulding, and on natural curing or vapor cure basis, carries out the step of secondary steam press maintenance again.

Described extrusion molding is divided into long-line pedestal method extrusion molding or the extrusion molding of unit flowing water method; Described casting is the formwork erection casting.

Effective CaO and effective SiO in the described concrete mixed material ₂Ratio range be controlled at 0.25～0.45 step and be:

1) be more than or equal to 2.0MPa according to the sheet material early strength, precuring is under vapor cure or the natural curing condition, determines that cement mixing content A is 10～23%;

When slab adopted vapor cure in early days, cement mixing content was 10～18%; Cement mixing content is 18～23% when adopting natural curing.

2) get that the CaO average content is 50% in the ordinary Portland cement, generate Ca (OH) behind the hydrated cementitious ₂Account for 20% and participate in the flyash hydrothermal synthesis reaction, then effective CaO is 10% in the cement.

3) get SiO in the flyash ₂Content greater than 40% and lime in CaO content greater than 65% numerical value, with SiO ₂With the ratio of CaO be 0.25～0.45, the following formula of substitution calculates the volume proportioning of flyash X and lime Y:

$\left\{\begin{array}{c}X+Y=60~70\%\\ (C\×Y+10\%\×A)/S\×X=0.25~0.45\end{array}\right.$

In the formula: X---fly-ash-contained; Y---lime incorporation; A---cement mixed weight;

S---SiO in the flyash ₂Content; C---CaO content in the lime.

Try to achieve flyash and lime addition content by this formula, i.e. effective CaO and effective SiO in the may command compound ₂Ratio C/S is at 0.25～0.45 optimum range.

Described sheet material lifts by crane intensity in early days more than or equal to 2.0MPa; Described precuring condition is a kind of in vapor cure or the natural curing, and its cement mixed weight is 10～23%.

Two kinds of precuring condition differences, its cement mixed weight difference, when the precuring condition adopted vapor cure, cement mixing content was 10～18%; When the precuring condition adopted natural curing, cement mixing content was 18～23%.

The step of described raw material activation treatment is to set according to different moulding processs:

When adopting screw extruding briquetting technology, the compound that stirs rolls fragmentation through wheel roller, and described wheel roller is a forced action type twin shaft Mill with roller, and the muller diameter is 1400～1600 * 450～500mm, each muller weight is 1.5～3 tons, about 5～6 minutes of rolling time.Compound through wheel roller roll fragmentation after, will have agglomerating flyash of hole and lime and pulverize, discharge air and water in the flyash, make mixing of materials even;

When adopting vertical cassette form moulding technology, dry grinded 5～6 minutes through the ball mill mixing by flyash, cement, lime, gypsum, sand and the light skeletal of proportioning metering, ball mill can adopt Φ 1.2～1.5M * 4.5～5.7M tuber grinder.Compound can make mixing more even after mixing dry grinding, and increases new surface, enlarges specific surface area, helps more active ingredient and participates in hydro-thermal reaction.

The forming step of described configuration reinforcement is the different function requirements according to the different thickness and the inside and outside wall board of plate, adopts the long-line pedestal method screw extruding briquetting, is configuration Φ 2.0～4.0mm longitudinal reinforcement on long-line pedestal; Vertical cassette form moulding is reinforced mesh or the longitudinal reinforcement at mould intracavity wall configuration Φ 2.0～4.0mm; The extrusion molding of unit flowing water method is arrangement of reinforcement not.

Described secondary high temperature steam press maintenance step, be to pile up on sign indicating number base car through the slab after natural curing or the vapor cure to send into autoclave, adopting temperature is that 173 ℃～200 ℃, pressure are the saturation steam of 0.8～1.5MPa, according to intensification 1.5～2 hours, constant temperature 4～12 hours, 2 hours conservation systems of cooling, carry out secondary high temperature steam press maintenance.

Described high temperature steam press maintenance is to make lime and the effective CaO content of cement and the effective SiO in the flyash in the compound ₂The abundant chemical combination of content, reaction generate C sufficient amount, that degree of crystallinity is suitable ₄S ₅H ₅Hold in the palm vigorous mullite class and a certain amount of water garnet class hydrated product, make sheet material improve intensity, reduce shrinkage value and improve the atmospheric stability performance.

The present invention is different from the most outstanding characteristics of prior art and is: in compound, with flyash is that main component and cement, lime are jointly as gelling material, be optimized the batching design according to C/S=0.25～0.45, compound is through rolling or mix the dry grinding activation treatment; And on natural curing or steam-cured basis, carry out secondary High Temperature High Pressure steam press maintenance again.It compared with prior art, it is as follows to have advantage:

(1), the concrete strength of sheet material and compactness improves, by the maintenance of autoclave High Temperature High Pressure, the timber intensity that goes out still can surpass 28 days intensity levels of general industry lime-ash concrete hollow batardeau plate standard code.

(2), significantly reduce the panel shrinkage performance, its shrinkage value can be lower than 0.4mm/M.

(3), compared with prior art, the anti-charing performance of product, atmospheric stability performance and sheet material weather resistance have been improved.

(4), strengthened flyash mixed dosage, doping quantity of fly ash is 40～65%, if comprise that slag can reach 70～80%, has reduced cement consumption, has reduced material cost, is of value to sharp useless and environmental requirement.

(5), enlarged the use range that industrial residue is made wallboard, not only can make inner partition plate, and because shrinkage value is low, Chinese People's Anti-Japanese Military and Political College's gas good stability also can be made the Side fascia of building enclosure and roof boarding etc.

(6), the present invention adopts optimizing materials proportion design and High Temperature High Pressure maintaining process technology, big, the good light porous batten of autoclaved fly ash concrete of function of the sharp useless amount of exploitation, its scrap build cost is low, construction investment only needs 200～3,000,000 yuan.Can utilize newly-built panel production line for Lightweight Steel Construction supporting sheet material factory and fly ash in electric power plant.Also can supply aerating concrete factory and the technological transformation of industrial residue lightweight concrete board material factory, develop new product.To aerating concrete factory, only needing increases part material treatment facility and sheet-forming machine, just can make full use of the throughput of existing autoclave, the light porous batten of production high-performance fly ash concrete; For industrial residue concrete light hollow slat factory, only needing increases raw material activation treatment equipment and autoclave, makes full use of originaling forming equipment, can produce the light porous batten of high performance fly ash concrete equally.Its performance all is better than existing fly ash aeroconcretes and light hollow slat, fundamentally solves the existing concrete light lath of China and in use occurs crack, hollowing easily, peels off and disadvantage such as fracture.

(7), adopt 200 ℃ of temperature, the atmospheric steaming pressuring curing process of 1.5MPa, formed C ₄S ₅H ₅Hold in the palm vigorous mullite degree of crystallinity optimum, and quantity is enough, performances such as product strength, anti-contraction, anti-charing are compared with currently available products, increase significantly, and can shorten curing time, save the energy, shorten the production cycle.

Description of drawings

Fig. 1 adopts the screw extruding briquetting process flow sheet for the present invention

Fig. 2 adopts the vertical cassette form moulding process flow sheet for the present invention

Embodiment

At first theoretical foundation of the present invention and experimental verification are carried out comparatively detailed introduction.

1, the theoretical foundation and the experimental verification of proportioning raw materials design

In steam-pressing silicate products, the main hydration products of performances such as decision product strength and contraction is the hydrated product of vigorous mullite class of holder and water garnet class.Hold in the palm vigorous mullite class hydrated product different by its degree of crystallinity and composition, mainly be divided into C ₄S ₅H ₅, CSH (B) and C ₂SH ₂Three kinds, wherein with C ₄S ₅H ₅Degree of crystallinity is best, is platelike crystal, and intensity is the highest, contains a large amount of C ₄S ₅H ₅The goods of hydrated product also have charing intensity preferably and low-shrinkage energy, and within the specific limits, product strength and anti-contracility can be along with C ₄S ₅H ₅The degree of crystallinity of hydrated product improves and quantity increases and improves; CSH (B) degree of crystallinity is lower, contains the goods of a large amount of CSH (B) hydrated product, though have higher intensity, shrinkability is bigger, and anti-charing performance is also very poor, and its calcium silicon is than between 0.8～1.5; C ₂SH ₂Hydrated product degree of crystallinity is minimum, is CaO and SiO ₂The product of initial action, it changes other hydrated product into very soon along with steaming the pressure process, and its calcium silicon is than between 1.5～2.Owing to contain more Al in the flyash ₂O ₃In the autoclaved fly ash goods, can form calcium aluminium water garnet, generally in CaO content＞10% o'clock appearance, and along with the CaO volume increases and increases, the goods that contain calcium aluminium water garnet can weaken article construction intensity, but can improve anti-charing performance and atmospheric stability performance, and have good sulphate-corrosion resistance energy.

According to above-mentioned theory, be to obtain high strength, low-shrinkage energy and the good powdered coal ash product of air stability, key is to make it to form the enough and degree of crystallinity of quantity and holds in the palm vigorous mullite and a certain amount of water garnet class hydrated product preferably.For this reason, must be according to C ₄S ₅H ₅Formation condition, optimizing materials proportion design, and select to steam press temperature and time.

The design of optimizing materials proportioning at first will be found out and generate the enough C of quantity ₄S ₅H ₅The best C/S ratio of hydrated product is promptly found out in lime and the cement SiO in the CaO content and flyash ₂Content optimum ratio scope designs batching according to C/S optimum ratio scope then.According to relevant testing data, flyash and lime with Beijing Thermal Power Plant according to different proportionings, are mixed and made into the lab scale body, wherein SiO in the flyash ₂Content is 51.46, Al ₂O ₃Content is 28.69; CaO content is 75% in the lime; Its examination body is carried out the strength comparison test, and the strength of test block testing data of the different volumes of its lime sees Table 1;

The strength of test block simultaneous test that table 1 lime intermingled quantity is different

Lime intermingled quantity 20% as seen from Table 1, and strength of test block is the highest during C/S=0.36.

Get the Shijingshan fly ash in electric power plant again, under different curing conditions, carry out the simultaneous test of the different proportioning examination of flyash body, wherein SiO in the flyash with lime ₂Content is 51.82, Al ₂O ₃Content is 37.51; CaO content is 75% in the lime; The test-results that influences to lime intermingled quantity under different curing conditions is shown in Table 2:

The different curing conditions of table 2 are to the influence test of lime intermingled quantity

Sequence number	Proportioning (%)					Ultimate compression strength (MPa)		Folding strength (MPa)
										Lime	Flyash	Gypsum	Water	C/S	90 ℃ of curing temperatures (2-12-2)	174.5 ℃ of curing temperatures (2-6-2)	90 ℃ of curing temperatures (2-12-2)	174.5 ℃ of curing temperatures (2-6-2)
	1	8	92	5	12		7.57	11.45	0.65										2.70
2										10	90	5	12		7.26	16.83	0.87	3.77
	3	12	88	5	12	0.19	6.40	19.50	1.00										5.16
4										15	85	5	12	0.25	9.31	21.05	1.38	5.01
	5	20	80	5	12	0.36	13.02	25.90	1.49										5.65

Annotate: the gypsum consumption is meant the percentage that accounts for lime consumption.

As seen from Table 2, no matter 90 ℃ of vapor cures or 174 ℃ of steam press maintenances all are at lime intermingled quantity 20%, i.e. C/S=0.25～0.36 o'clock, and strength of test block is the highest.Because China's flyash and lime particle fineness and composition difference thereof are bigger, between 15～25%, strength of test block is in the peak scope to lime intermingled quantity greatly, and when surpassing 15～25% scopes, then intensity obviously reduces.Lime intermingled quantity was at 50% o'clock, and intensity reduces more than 2 times.Contrast under 175 ℃ of autoclaved conditions the X ray and the electron microscope that form hydrated product, also as can be seen, lime intermingled quantity forms and holds in the palm vigorous mullite C between (promptly 15～25%) about 20% just ₄S ₅H ₅Quantity is more, and an amount of water garnet is arranged, and when lime intermingled quantity＞50%, then the water garnet becomes main hydration products, because C ₄S ₅H ₅Hydrated product quantity reduces and makes the intensity reduction particularly evident.

In addition, carbonation properties is an important indicator of weighing the powdered coal ash product weather resistance.According to relevant testing data, get carbon content higher relatively (13.61%), and SiO ₂+ Al ₂O ₃Be lower than 70% flyash, test sees Table 3 to the powdered coal ash product carbonation intension to carry out different lime intermingled quantities under common steam curing (90 ℃):

The relation of different lime intermingled quantities of table 3 and curing time and powdered coal ash product carbonation intension

ACaO content (%) in the lime	Lime and aggregate ratio	Kiln discharge 24h intensity (MPa)	Whole carbonization times (d)	Intensity (MPa) after whole carbonizations	With whole carbonizations with the test specimen intensity (MPa) that leaves in the length of time in the atmosphere	R carbonization/R kiln discharge (%)	R carbonization/R is with atmosphere in the length of time (%)	Curing time (h)
									10	1∶1.2	7.66	50	5.46	8.0	70.8	67.7	5
15	1∶1.2	7.0	50	8.42	9.94	120	84.7	5
									20	1∶1.2	9.52	50	13.12	12.26	137	107	5
10	1∶1.2	13.52	50	7.6	13.92	52.3	54.0	15
									15	1∶1.2	15.52	50	12.16	19.08	78.4	63.0	15
20	1∶1.2	16.26	50	15.92	22.04	98	72.1	15

Annotate: the flyash SiO that adopts ₂Content 43.09%, Al ₂O ₃Content 12.42%, carbon content 13.61%.

Identical down at curing time as can be seen from Table 3, no matter be the intensity behind the kiln discharge, or carbonation intension, all improve along with increasing of CaO content.Lack (5h) when curing time, during effective CaO content 10%, carbonation intension reduces than kiln discharge intensity, between 15% to 20%, carbonation intension improves on the contrary, and this is because curing time is shorter, residual ionization CaO is more relatively in the goods, and carbonation intension surpasses kiln discharge intensity even; Growing (15h) carbonation intension when curing time all has reduction, but in effective CaO content 15～20% o'clock, carbonation intension reduced rate minimum.Can further prove thus, when effective CaO content in the raw material in 15～20% scopes, the goods weather resistance also is an optimum regime.

According to above-mentioned theory and verification experimental verification, take all factors into consideration the influence of blanks and moulding and conserving condition difference, material fineness and level pairing combination reaction, when lime intermingled quantity 15～25%, the every performance the best of powdered coal ash product is by this corresponding effective CaO and effective SiO of calculating in its raw material ₂Ratio (C/S), be 0.25～0.45.Can think that thus this ratio is C ₄S ₅H ₅The best formation condition of hydrated product should be the optimum proportion scope of proportioning raw materials design.

2, carry out the material fiting ratio method of design according to C/S=0.25～0.45

Under the regular situation, the design of concrete proportioning is to prepare burden according to theory of strength, and wherein cement is main gelling material, constitutes the main ingredient of concrete strength, and flyash is as adulterant, is not as gelling material, does not consider its chemical action substantially.The present invention is according to C ₄S ₅H ₅The hydrated product formation condition, according to the design of preparing burden of raw material chemical constitution, and flyash is not as adulterant, but chemical reaction takes place jointly for component and lime, the cement of the main gelling material of conduct, and cement mixing content lifts by crane intensity in early days by slab and determines; Calcium Si oxide abundant chemical combination under hot conditions generates the C that helps gain in strength and shrinkage value reduction in the raw material ₄S ₅H ₅-class and water garnet class hydrated product produce shrinkage crack and atmosphere instability problem thereby fundamentally solve this based article.

The present invention is as follows according to C/S=0.25～0.45 design material fiting ratio concrete grammar: determine that at first flyash and lime are main ingredient in the material, account for 60%～70% of concrete mixed material; Cement guarantees the early stage structural strength of goods except that being used to, formed portion C a (OH) after its aquation ₂The hydro-thermal of also participate in steaming pressure each stage of process is synthetic, approximately consumes about 20% of CaO amount in the cement; When preparing burden design calculation according to C/S=0.25～0.45, the effective CaO amount should comprise the CaO amount that consumes in the cement in the material, and getting the average CaO content of cement is 50%, and then the CaO of cement participation flyash hydrothermal synthesis reaction is 10%.Set up following calculation formula thus:

$\left\{\begin{array}{c}X+Y=60\%~70\%\\ (C\×Y+10\%\×A)/S\×X=0.25~0.45\end{array}\right.$

In the formula: X, Y---be respectively flyash and lime incorporation;

S---SiO in the flyash ₂Content;

C---CaO content in the lime;

A---cement mixed weight (10%～23%);

10%---cement participates in the CaO content of hydrothermal synthesis reaction;

60%～70%---flyash and lime account for the ratio of concrete mixed material.

By this formula, calculate flyash in the fly ash concrete compound, lime and cement optimum mix.Manufacturing enterprise's raw material optimum mix numerical value in actual production sees Table 4;

Table 4 fly ash concrete hollow lath raw material optimum mix

Factory can be according to SiO in the flyash ₂CaO content and cement mixing content in content and the lime are used above-mentioned formula, also can corresponding above table data, and adopt interpolation to calculate flyash and lime optimum proportion ratio respectively.Under this proportioning, the intensity of fly ash concrete plate, contraction and anti-charing performance the best, doping quantity of fly ash is also the highest.

Except that adding cement, flyash, lime, can also require an amount of pearlstone of adding, light skeletal to make adulterant in the compound according to area density; Light skeletal plays skeleton function in raw material, select for use in slag, float stone or the haydite a kind ofly, and its maximum particle diameter is no more than 8mm, and volume is generally 10～15%, under the situation that concrete strength and area density meet the demands, also can not mix float stone or haydite; Sand plays filling effect as fine aggregate in raw material, form early strength with cement chemical combination, and its granulometric composition requires thick medium sand to surpass 60%, and wherein 0.16～1.25mm accounts for 50%, 1.25～2.5mm and accounts for 10%; When being mixed with light skeletal (slag, float stone or haydite), the sand volume is generally 10～20%; When not mixing light skeletal, the sand volume is about 10～30%; When flyash contains SiO ₂Measure on the low side＜40% o'clock, need mix fine quartz sand and participate in hydrothermal synthesis reaction as siliceous raw material, in order to regulate product strength and shrinkage, require fine quartz sand particle diameter＜0.15mm for well this moment, volume is generally 15～20% of flyash, and concrete proportioning can be determined by test according to raw material actual state and weather condition.

3. light porous sheet metal forming of fly ash concrete

The light porous batten moulding process of fly ash concrete comprises the conventional screw extruding briquetting (two kinds of long-line pedestal method and unit flowing water methods) and the steps necessary of vertical cassette form moulding technology, as shown in Figure 1.Its different step that is different from existing technology is:

1) raw material is carried out the proportioning design according to best C/S ratio;

Proportioning raw materials should be satisfied with effective SiO in middle effective CaO content of lime (cement) and the described flyash ₂The ratio (C/S) of content is under 0.25～0.45 the requirement, to make its product reach optimum performance.

Raw material ratio (weight percent) is: cement 10～23%, lime 4～20%, flyash 40～65%, light skeletal 0～15%, sand 10～30%, gypsum are 0～10% and suitable quantity of water of cement consumption, mix and stir, material quality requires to meet the relevant regulations of the relevant silicate building products of country with raw material standards.

Cement, gypsum addition mainly be for guarantee slab initial stage lifting and carrying have enough intensity (〉=2.0MPa), different according to moulding process with the precuring condition, regulate the incorporation of cement and gypsum, when slab adopted vapor cure in early days, cement mixing content was 10～18%; When adopting natural curing, cement mixing content is 18～23%.Bigger in the moulding squeeze, the slab degree of compactness is higher or when adopting vapor cure, cement consumption also can reduce; Less in the moulding squeeze, during the lower or natural curing of slab degree of compactness, cement consumption can suitably strengthen; Adding gypsum is that cement early strength is played excitation, and its gypsum add-on is a cement add-on 0～10%.

2) adopt screw extruding briquetting or vertical cassette form moulding slab:

Screw extruding briquetting technology comprises two kinds of long-line pedestal method extrusion molding (shaper moves) and unit flowing water method extrusion moldings (shaper is motionless).The sort of mode no matter, raw material mixes stirring through conventional metering, after adding suitable quantity of water digestion, all compound will be sent into wheel roller carries out after rolling handles, send into screw extrusion press again, the long-line pedestal method extrusion molding is to configure shaping slab on the long-line pedestal of longitudinal reinforcement, and the moulding of unit flowing water method then is unworthy of reinforcing bar.

Because the doping quantity of fly ash of the light porous batten of high-performance fly ash concrete is higher, and flyash is a kind of material of vesicular structure, its porosity is up to 65～75%, therefore between flyash inside and particle, contain a large amount of empty G﹠Ws, flyash and lime is easily balling-up separately, it is even to be difficult for mix, functions as follows by rolling:

(1), discharge the empty G﹠W of part in the material, make its mixing more even, closely knit, evidence, through the material of rolling, its unit weight can improve 30～60%, base substrate unit weight also can improve 10～25%.

(2), can extrude the part moisture of particle hole inside, make it be distributed in particle surface, increase plasticity, reduce the moulding water consumption, improve the processability of compound.According to testing data, the compound moulding moisture behind the rolling can obviously reduce.

(3), for siliceous raw materials such as slag and sand, roll crushing effect through rolling, and the granule in crushing flyash and the lime, increase particle surface newly, enlarge the aquation surface-area, make itself and cement, lime thorough mixing, the promotion hydration reaction, play and excite the material active function, and can prevent that the unslaked lime later stage from bursting phenomenon to sheet material.

Used wheel roller is a forced action type twin shaft wheel roller, and its muller diameter is 1400～1600mm * 450～500mm, and each muller weight is 1.5～3 tons, about 5～6 minutes of rolling time.

When adopting vertical cassette form moulding, flyash in the compound, lime, gypsum, cement, sand and light skeletal mix through the ball mill dry grinding, to enlarge material specific surface area, especially to fly ash grain, can destroy vitreum increases new surface, helps more gelation activity component and participates in hydro-thermal reaction.General adopted Φ 1.2～1.5M * 4.5～5.7M tuber grinder mix grinding 5～6 minutes.

3), configuration reinforcement as required

For producing Side fascia, screw extruding briquetting or vertical cassette form moulding all must the configuration double steel bars.

The long-line pedestal method screw extruding briquetting, its reinforcement manner comprises the steps:

(1), reinforcing bar is given earlier stretching, the transverse section desired location configuration double steel bar of pressing board is fixed on the pedestal two ends;

(2), along pedestal direction placement positioning pin, reinforcement location is fixed, screw extrusion press is walked on pedestal, one side is pushed concrete mixed material and reinforcing bar is wrapped a shaping slab.

Vertical cassette form moulding, its reinforcement manner are both sides configuration reinforcement net sheet or vertical single reinforcements in the formwork erection chamber, and the pour concrete compound is imbedded in the concrete reinforcing bar, forms the arrangement of reinforcement slab.

According to sheet material different thickness and performance requriements, bar diameter is 2.0～4.0mm, also can be unworthy of reinforcing bar.Can produce 90mm, 100mm, inside and outside wall board that 120mm is different with the 150mm equal thickness.

4) select suitable steaming to press temperature and time

The fly ash concrete goods will obtain high strength, the low contraction and good charing performance, and key is to generate the enough and degree of crystallinity of quantity C preferably ₄S ₅H ₅Hold in the palm vigorous mullite and a certain amount of water garnet class hydrated product.For this reason, must be according to C ₄S ₅H ₅The hydrated product formation condition is selected suitable steam press maintenance temperature and time.

Experimental study shows, the maintenance at normal temperatures of fly ash concrete goods, and the hydrated product of generation mainly is the CSH that degree of crystallinity is poor, basicity is high (B); Also be to generate CSH (B) class hydrated calcium silicate under 100 ℃ of steam curings, only CSH (B) quantity is more, and degree of crystallinity is high slightly, simultaneously with the less water garnet.Only maintenance under High Temperature High Pressure could generate a fairly large number ofly, and degree of crystallinity is C preferably ₄S ₅H ₅Hold in the palm vigorous mullite and a certain amount of water garnet hydrated product.According to relevant testing data, about 170 ℃, the vigorous mullite transition of hydrated product CSH (B) forward holder forms the vigorous mullite of holder so-called time, and its degree of crystallinity is still than C ₄S ₅H ₅Relatively poor, specific surface area is big, and adsorpting water quantity is also big, up to more than 200 ℃, just can form degree of crystallinity C preferably ₄S ₅H ₅Platelike crystal, therefore constant temperature 4～6 hours under 200 ℃, the saturated vapo(u)r of 1.5MPa, the C of formation ₄S ₅H ₅Hold in the palm vigorous mullite degree of crystallinity optimum, and quantity is enough, thereby it is the highest to constitute product strength, shrinkage value is minimum, and anti-charing performance is also best; Simultaneously, by the maintenance under the autoclave high-temperature and high-pressure conditions, not only promote C ₄S ₅H ₅Hydrated product well generates, and can shorten curing time, saves the energy, the faster production cycle.The maintaining process step of slab is as follows:

(1), natural curing or vapor cure: for screw extruding briquetting, long-line pedestal method adopts different maintenance methods with unit flowing water method.The natural curing of long-line pedestal fado, after the arrival lifting intensity, the cutting slab is piled up on sign indicating number base car, sends into autoclave; Unit flowing water method can adopt vapor cure, and slab is sent into curing room together with the steel supporting plate, and maintenance was piled up on sign indicating number base car to the specified time, sent into autoclave again; Battery-mold process adopts vapor cure, is to arrive the prescribed strength demoulding by the logical steam heating maintenance of the steel pipe of loosing core of inserting, and slab is piled up on sign indicating number base car, sends into autoclave.Under the situation that cement mark improves and volume increases, and mix proper amount of gypsum, guarantee that sheet material obtains sufficient intensity in early days,, can omit vapor cure, adopt the natural curing method usually greater than 2.0MPa.

(2), high temperature steam press maintenance: slab must carry out the High Temperature High Pressure maintenance in autoclave after natural curing and vapor cure.The autoclave temperature is set at 194～200 ℃, the saturation steam of pressure 1.3～1.5MPa, according to heating up 1.5～2 hours, and constant temperature 4～6 hours, the 2 hours conservation systems of lowering the temperature carry out steam press maintenance.

If the autoclave of existing factory does not reach said temperature and pressure, can also adopt steaming to press 173～194 ℃ of temperature, pressure is the saturation steam of 0.8～1.3MPa, according to intensification 1.5～2 hours, constant temperature 6～12 hours, the conservation system of lowering the temperature 2 hours carries out steam press maintenance.

This shows that above-mentioned know-why of the present invention and measure both be different from light hollow slats such as the existing industrial residue concrete of China, were different from the solid batten of aerating concrete again.The difference of light hollow slats such as it and existing industrial residue concrete, be starting material and proportioning difference thereof, the maintaining process difference, the raw-material effect and the mechanism that reacts to each other are also different, the final hydrated product that forms is different fully, thereby plate property is significantly different with quality; The difference of it and aerating concrete sheet material is two kinds of diverse production technique, two kinds of different concrete structure and performances thereof.So far in all Cement Concrete building boards, all be to carry out the proportioning design and adopt natural curing or steam curing technology according to the theory of strength of routine, and the present invention optimizes proportion design and adopts the High Temperature High Pressure maintaining process according to the raw material chemical constitution, these two measures are complemented each other again, indispensable, its great advantage is that doping quantity of fly ash increases greatly than the volume in the conventional Cement Concrete, and product properties significantly improves, not only the lightweight inner partition wall plate can be made, and Side fascia can be made.

According to the data of above-mentioned theory and verification experimental verification, the concrete operations in actual production are as follows:

Embodiment 1:

As shown in Figure 1, employing long-line pedestal method extrusion molding compound is 1000 kilograms the light porous batten of fly ash concrete: get flyash and contain SiO ₂46.5%, unslaked lime contains CaO65%, and cement is ordinary Portland cement 42.5 ^#Its manufacturing step is as follows:

Step 1: according to the requirement of sheet material early strength, water mixing mud 15%, press C/S=0.25 design batching:

If doping quantity of fly ash X, lime intermingled quantity Y set up calculation formula:

$\left\{\begin{array}{c}X+Y=60\%\\ (C\×Y+10\%\×A)/S\×X=0.25\end{array}\right.$

In the formula: C---lime CaO content is 65%; S---flyash SiO ₂Content is 46.5%;

A---cement mixing content 15%.

By formula try to achieve doping quantity of fly ash X=53%, lime intermingled quantity Y=7%,, adjust sand and light skeletal volume again according to the requirement of sheet material area density.

Then the weighing of compound is 150 kilograms of cement, 70 kilograms in lime, 530 kilograms in flyash, 100 kilograms in slag, 150 kilograms of sands, and other adds 12 kilograms in gypsum, water cement ratio 0.36, and mixing and stirring was cleared up 30 minutes;

Step 2: above-mentioned compound is sent into wheel roller, rolled 6 minutes, make compound crushed, mix by forced action type twin shaft wheel roller;

Step 3: on long-line pedestal that reinforcing bar is stretching in advance, the transverse section desired location configuration double steel bar of pressing board is fixed on the pedestal two ends, and along pedestal direction placement positioning pin, reinforcement location is fixed;

Step 4: adopt the screw extrusion press moulding, the compound that rolls stirring is sent into screw extrusion press, configuring on the pedestal of longitudinal reinforcement, by the hollow slab of screw extrusion press moulding arrangement of reinforcement; Its thickness is any one of different thickness such as 90mm, 100mm, 120mm or 150mm, and its slab concrete is closely knit, even, and reinforcement cover is guaranteed;

Step 5: natural curing 2～3 days, to lifting intensity, slab is cut, carries, piles up on sign indicating number base car, send into autoclave;

Step 6: in autoclave, carry out the maintenance of secondary High Temperature High Pressure

Carry out steam press maintenance with the 1.2MPa autoclave, 184 ℃ of temperature settings, saturated vapour pressure are 1.2MPa in the autoclave, carry out maintenance according to intensification 2 hours, constant temperature 8 hours, 2 hours systems of cooling;

Step 7: product goes out still, stacking.

Embodiment 2:

As shown in Figure 1, employing long-line pedestal method extrusion molding compound is 1000 kilograms the light porous batten of fly ash concrete: get flyash and contain SiO ₂46.5%, lime contains CaO65%, and cement is ordinary Portland cement 42.5 ^#

Step 1: according to the requirement of sheet material early strength, water mixing mud 23%, press C/S=0.45 design batching:

If doping quantity of fly ash X, lime intermingled quantity Y set up calculation formula:

$\left\{\begin{array}{c}X+Y=65\%\\ (C\×Y+10\%\×A)/S\×X=0.45\end{array}\right.$

In the formula: C---lime CaO content is 65%; S---flyash SiO ₂Content is 46.5%;

A---cement mixing content 23%.

By formula try to achieve doping quantity of fly ash X=52%, lime intermingled quantity Y=13%,, adjust sand and light skeletal volume again according to the requirement of sheet material area density.

Then the compound weighing is: 230 kilograms of cement, 130 kilograms in lime, 520 kilograms in flyash, sand 120 kg, and other adds 11.5 kilograms in gypsum, water cement ratio 0.36, mixing and stirring was cleared up 30 minutes;

Step 2: above-mentioned compound is sent into wheel roller, rolled 6 minutes, make the compound crushing, mix by forced action type twin shaft wheel roller;

Step 3: on long-line pedestal that reinforcing bar is stretching in advance, the transverse section desired location configuration double steel bar of pressing board is fixed on the pedestal two ends, and along pedestal direction placement positioning pin, reinforcement location is fixed;

Step 4: adopt the screw extrusion press moulding, the mixed material that rolls stirring is sent into screw extrusion press, configuring on the pedestal of longitudinal reinforcement, by the hollow slab of screw extrusion press moulding arrangement of reinforcement; Its thickness is any one of different thickness such as 90mm, 100mm, 120mm or 150mm, and its slab concrete is closely knit, even, and reinforcement cover is guaranteed;

Step 5: natural curing 24 hours, reach lifting intensity, slab is cut, carries, piles up on sign indicating number base car, send into autoclave;

Step 6: in autoclave, carry out the maintenance of secondary High Temperature High Pressure

Carry out steam press maintenance with the 1.3MPa autoclave, 194 ℃ of autoclave temperature settings, saturated vapour pressure are 1.3MPa, carry out steam press maintenance according to intensification 2 hours, constant temperature 6 hours, 2 hours systems of cooling;

Step 7: product goes out still, stacking.

Embodiment 3:

As shown in Figure 1, employing unit flowing water method extrusion molding compound is 1000 kilograms the light porous batten of fly ash concrete: get flyash and contain SiO ₂46.5%, lime contains CaO65%, and cement is ordinary Portland cement 42.5 ^#

Step 1: according to the requirement of sheet material early strength, water mixing mud 15% is pressed C/S=0.35 design batching, establishes doping quantity of fly ash X, lime intermingled quantity Y, sets up calculation formula:

$\left\{\begin{array}{c}X+Y=65\%\\ (C\×Y+10\%\×A)/S\×X=0.35\end{array}\right.$

In the formula: C---lime CaO content 65%; S---coal ash SiO ₂Content 46.5%;

A---cement mixing content 15%.

By formula try to achieve doping quantity of fly ash X=54%, lime intermingled quantity Y=11%,, adjust sand and light skeletal volume again according to the requirement of sheet material area density.

Then the compound weighing is: 150 kilograms of cement, 110 kilograms in lime, 540 kilograms in flyash, 150 kilograms of sands, 50 kilograms of haydites, and other adds 15 kilograms in gypsum, water cement ratio 0.36, mixing and stirring was cleared up 30 minutes;

Step 2: above-mentioned compound is sent into wheel roller, and by forced action type twin shaft rolling mixing machine, the muller diameter is 1400～1600 * 450～500mm, and each muller weight is 1.5～3 tons, 6 minutes rolling time, make the compound crushing, and mix;

Step 3: the compound that will roll after the fragmentation is sent into screw extrusion press, and can produce thickness is 90mm, 100mm and three kinds of plain concrete porous battens of not joining reinforcing bar of 120mm, and the slab that extrusion molding is good moves carrying in company with the steel supporting plate;

Step 4: will send into curing room with the slab of steel supporting plate, and adopt 90 ℃ of vapor cures 10 hours, slab is piled up on sign indicating number base car, and send into autoclave;

Step 5: in autoclave, carry out the maintenance of secondary High Temperature High Pressure

It is 1.5MPa that the autoclave temperature is set at 200 ℃, saturated vapour pressure, and steam press maintenance is carried out in 1.5 hours, constant temperature 4 hours, 2 hours systems of cooling according to heating up.

Step 6: product goes out still, stacking.

Embodiment 4:

As shown in Figure 2, employing vertical cassette form moulding compound is 1000 kilograms the light porous batten of fly ash concrete: get flyash and contain SiO ₂46.5%, lime contains CaO65%, and cement is ordinary Portland cement 42.5 ^#

Step 1: according to the requirement of sheet material early strength, water mixing mud 18%, prepare burden according to the C/S=0.25 design:

If doping quantity of fly ash X, lime intermingled quantity Y set up calculation formula:

$\left\{\begin{array}{c}X+Y=65\%\\ (C\×Y+10\%\×A)/S\×X=0.25\end{array}\right.$

In the formula: C---lime CaO content is 65%; S---flyash SiO ₂Content is 46.5%;

A---cement mixing content 18%.

By formula try to achieve doping quantity of fly ash X=57.5%, lime intermingled quantity Y=7.5%,, adjust sand and light skeletal volume again according to the requirement of sheet material area density.

Then the compound weighing is: 180 kilograms of cement, 75 kilograms in lime, 575 kilograms in flyash, 170 kilograms of sands, and other adds 9 kilograms in gypsum, mixing and stirring;

Step 2: above-mentioned compound is sent into ball mill, mix dry grinding 5 minutes, the input forced stirrer;

Step 3: compound in forced mixer, is pressed water cement ratio 0.7-0.8, add water and stir, and have flowable and mold filling character;

Step 4: battery mould is installed, at inboard two wall configuration reinforcement net sheet or the longitudinal reinforcements of die cavity, the slip casting that will have flowable is gone into mould, the one side cast, one side is inserted steel pipe in center core layer, and carry out the weak vibration moulding with attached type vibrator, can produce the light porous batten of fly ash concrete that the external and internal wall done of different thickness such as 90mm, 100mm, 120mm or 150mm is used.

Step 5: vapor cure, the formwork erection concrete slab that casting is good is quiet to stop 40 minutes, and by the logical 100 ℃ of hot steam maintenances of center steel pipe 10 hours, the form removal lifting was piled up slab on sign indicating number base car, sends into autoclave;

Step 6: in autoclave, carry out the maintenance of secondary High Temperature High Pressure

It is 1.4MPa that the autoclave temperature is set at 200 ℃, saturated vapour pressure, and steam press maintenance is carried out in 2 hours, constant temperature 4 hours, 2 hours systems of cooling according to heating up.

Step 7: product goes out still, stacking.

Embodiment 5:

As shown in Figure 2, employing vertical cassette form moulding compound is 1000 kilograms the light porous batten of fly ash concrete: get flyash and contain SiO ₂46.5%, lime contains CaO65%, and cement is ordinary Portland cement 42.5 ^#

Step 1: according to the requirement of sheet material early strength, water mixing mud 15%, prepare burden according to the C/S=0.45 design:

If doping quantity of fly ash X, lime intermingled quantity Y set up calculation formula:

$\left\{\begin{array}{c}X+Y=70\%\\ (C\×Y+10\%\×A)/S\×X=0.45\end{array}\right.$

In the formula: C---lime CaO content is 65%; S---flyash SiO ₂Content is 46.5%;

A---cement mixing content 15%.

By formula try to achieve doping quantity of fly ash X=54.7%, lime intermingled quantity Y=15.3%,, adjust sand and light skeletal volume again according to the requirement of sheet material area density.

Then the compound weighing is: 150 kilograms of cement, 547 kilograms in flyash, 153 kilograms in lime, 150 kilograms of sands, mixing and stirring;

Step 2: above-mentioned compound is sent into ball mill, mix dry grinding 6 minutes, the input forced stirrer;

Step 3: compound in forced mixer, is pressed water cement ratio 0.7-0.8, add water and stir, and have flowable and mold filling character;

Step 4: battery mould is installed, at inboard two wall configuration reinforcement net sheet or the longitudinal reinforcements of die cavity, the slip casting that will have flowable is gone into mould, the one side cast, one side is inserted steel pipe in center core layer, and carry out the weak vibration moulding with attached type vibrator, can produce the light porous batten of fly ash concrete that the external and internal wall done of different thickness such as 90mm, 100mm, 120mm or 150mm is used.

Step 5: vapor cure, the formwork erection concrete slab that casting is good is quiet to stop 40 minutes, and by the logical 90 ℃ of hot steam maintenances of center steel pipe 12 hours, the form removal lifting was piled up slab on sign indicating number base car, sends into autoclave;

Step 6: in autoclave, carry out the maintenance of secondary High Temperature High Pressure

200 ℃ of autoclave temperature settings, saturated vapour pressure are 1.5MPa, carry out steam press maintenance according to intensification 2 hours, constant temperature 4 hours, 2 hours systems of cooling.

Step 7: product goes out still, stacking.

Embodiment 6:

As shown in Figure 2, employing vertical cassette form moulding compound is 1000 kilograms the light porous batten of fly ash concrete: get flyash and contain SiO ₂46.5%, lime contains CaO65%, and cement is ordinary Portland cement 42.5 ^#

Step 1: according to the requirement of sheet material early strength, water mixing mud 10%, prepare burden according to the C/S=0.40 design:

If doping quantity of fly ash X, lime intermingled quantity Y set up calculation formula:

$\left\{\begin{array}{c}X+Y=70\%\\ (C\×Y+10\%\×A)/S\×X=0.40\end{array}\right.$

In the formula: C---lime CaO content is 65%; S---flyash SiO ₂Content is 46.5%;

A---cement mixing content 10%.

By formula try to achieve doping quantity of fly ash X=55.6%, lime intermingled quantity Y=14.4%,, adjust sand and light skeletal volume again according to the requirement of sheet material area density.

Then the compound weighing is: 100 kilograms of cement, 556 kilograms in flyash, 144 kilograms in lime, 150 kilograms of sands, 50 kilograms of haydites, and other adds 8 kilograms in gypsum, mixing and stirring;

Step 2: above-mentioned compound is sent into ball mill, mix dry grinding 5 minutes, ball mill can adopt Φ 1.2～1.5M * 4.5～5.7M tuber grinder;

Step 3: compound in forced mixer, is pressed water cement ratio 0.7-0.8, add water and stir, and have flowable and mold filling character;

Step 4: battery mould is installed, at inboard two wall configuration reinforcement net sheet or the longitudinal reinforcements of die cavity, the slip casting that will have flowable is gone into mould, the one side cast, one side is inserted steel pipe in center core layer, and carry out the weak vibration moulding with attached type vibrator, can produce the light porous batten of fly ash concrete that the external and internal wall done of different thickness such as 90mm, 100mm, 120mm or 150mm is used.

Step 5: vapor cure, the formwork erection concrete slab that casting is good is quiet to stop 40 minutes, and by the logical 90 ℃ of hot steam maintenances of center steel pipe 12 hours, the form removal lifting was piled up slab on sign indicating number base car, sends into autoclave;

Step 6: in autoclave, carry out the maintenance of secondary High Temperature High Pressure

173 ℃ of autoclave temperature settings, saturated vapour pressure are 0.8MPa, carry out steam press maintenance according to intensification 2 hours, constant temperature 12 hours, 2 hours systems of cooling.

Step 7: product goes out still, stacking.

Each carried out performance test the foregoing description 1～embodiment 6 through 28 days, see Table 5 with the product and the contrast of standard performance index of prior art.

The product performance index contrast of table 5 the present invention and prior art sees Table

Claims (10)

1. light porous batten of fly ash concrete, it processes at interior compound by including cement, flyash, lime, gypsum, sand and light skeletal, it is characterized in that: effective SiO in effective CaO and the described flyash in described cement, the lime ₂Ratio range be C/S=0.25～0.45.

2. the light porous batten of fly ash concrete according to claim 1, it is characterized in that: the add-on of described flyash and described lime accounts for 60～70% of described compound weight percent; Described cement mixing content is determined by the slab early strength.

3. the light porous batten of fly ash concrete according to claim 1 and 2 is characterized in that: described mix material proportioning is (by weight percentage): cement 10～23%, lime 4～20%, flyash 40～65%; Sand 10～30%, light skeletal 0～15%, gypsum are 0～10% of cement mixing content.

4. the light porous batten of fly ash concrete according to claim 1 and 2 is characterized in that: the effective SiO of described flyash ₂Content is lower than at 40% o'clock, and described compound needs the admixture fine quartz sand, and its addition content is 15～20% of a described flyash adding total amount.

5. the manufacture method of the light porous batten of each described fly ash concrete of claim 1-4 comprises the conventional sheet material screw extruding briquetting or the steps necessary of vertical cassette form moulding technology, it is characterized in that: comprise effective CaO and SiO in the compound ₂Ratio range be controlled at 0.25～0.45 step, compound stirs after the forming step of the step that overactivation is handled, configuration reinforcement and on natural curing or vapor cure basis carries out the step of secondary steam press maintenance again.

6. the manufacture method of the light porous batten of fly ash concrete according to claim 5 is characterized in that: effective CaO and SiO in the described compound ₂Ratio range be controlled at 0.25～0.45 step and be:

1) lifts by crane intensity and early stage curing condition in early days according to sheet material, determine cement mixed weight;

2) get that the CaO average content is 50% in the ordinary Portland cement, generate Ca (OH) behind the hydrated cementitious ₂Account for 20% and participate in the flyash hydrothermal synthesis reaction, then effective CaO is 10% in the cement.

3) get SiO in the flyash ₂Content greater than 40% and lime in CaO content greater than 65% numerical value, with CaO and SiO ₂Ratio C/S=0.25～0.45, the following formula of substitution calculates the volume proportioning of flyash X and lime Y:

$\left\{\begin{array}{c}X+Y=60\%~70\%\\ (C\×Y+10\%\×A)/S\×X=0.25~0.45\end{array}\right.$

In the formula: S is SiO in the flyash ₂Content;

C is a CaO content in the lime;

A is a cement mixed weight, and its cement mixed weight accounts for 10%～23% of described compound weight percent;

4) according to the specific requirement of sheet material area density, volume proportioning according to step 3) definite flyash, lime and cement determines that the sand of admixture is that described compound weight percent is 10～30%, and the admixture light skeletal is that described compound weight percent is 0～15%.

7. the manufacture method of the light porous batten of fly ash concrete according to claim 5, it is characterized in that: described activation treatment rolls fragmentation or sends into mixing dry grinding fragmentation in the ball mill for compound being sent into wheel roller, described Mill with roller is the twin shaft wheel roller, the diameter of described muller is 1400～1600 * 450～500mm, its weight is 1.5～3 tons, and the time of described rolling is 5～6 minutes; The time of described mixing dry grinding is 5～6 minutes.

8. the manufacture method of the light porous batten of fly ash concrete according to claim 5, it is characterized in that: described configuration reinforcement is shaped to the double-deck longitudinal reinforcement of configuration on long-line pedestal, through screw extruding briquetting, by described compound described double-deck longitudinal reinforcement is wrapped, form the hollow slab of arrangement of reinforcement, described double-deck longitudinal reinforcement diameter is Ф 2.0～4.0mm.

9. the manufacture method of the light porous batten of fly ash concrete according to claim 5, it is characterized in that: described configuration reinforcement is shaped in the battery mould chamber along both sides inner wall arrangement reinforced mesh or longitudinal reinforcement, the fixed position casting, form the arrangement of reinforcement slab, described reinforced mesh or longitudinal reinforcement diameter are Ф 2.0～4.0mm.

10. the manufacture method of the light porous batten of fly ash concrete according to claim 5, it is characterized in that: described secondary steam press maintenance carries out the High Temperature High Pressure maintenance for reenter autoclave after common steam maintenance or natural curing, and the temperature of saturation steam is that 173 ℃～200 ℃, pressure are 0.8～1.5MPa in the described autoclave; Its secondary steaming pressuring curing system is: heat up 1.5～2 hours, constant temperature 4～12 hours, cooling 2 hours.

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