CN101327621A - Steamed aerated concrete - Google Patents

Abstract

The present invention relates to an autoclaved aerated concrete, which is composed of lime, cement, coal ash or quartz sand, gypsum, foaming agent and admixture. The autoclaved aerated concrete has the advantages of light volume weight, good heat-preserving property, large building plane utilization coefficient, processibility, and good fireproof property.

Description

Steam-pressing aero-concrete

Technical field

The present invention relates to a kind of construction material, relate in particular to a kind of concrete.

Background technology

Concrete is widely used in building field.

Existing concrete is the compound that is cooperated by a certain percentage by cementitious matter and water, forms the artificial stone with certain intensity after hardening.With cement is that cementitious matter cooperates according to a certain percentage with sand, stone, water, stirs the cement concrete that is referred to as of moulding, and its unit weight is generally 2400kg/m ³Cooperate by a certain percentage with calcareous material and siliceous material, stir the silicate concrete that is referred to as of moulding, its unit weight is generally 1600-2400kg/m ³Adopt light-weight aggregate or replace the concrete that gathers materials and form in the normal concrete with bubble, be referred to as lightweight concrete, its unit weight is less than 1900kg/m ³

The concrete that adopts the light collection of conducts such as various haydites, swollen pearl to make is referred to as light aggregate concrete, and its unit weight is generally 800-1800kg/m ³

Above-mentioned series concrete unit weight is heavy, and sound insulation, heat-proof quality are relatively poor, do not possess processing conditions, and its artificial stone that all forms under normal temperature or steam curing, and the production cycle is long.

Summary of the invention

The technical issues that need to address of the present invention have provided a kind of steam-pressing aero-concrete, are intended to solve above-mentioned defective.

In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:

The present invention is made up of lime, cement, flyash or quartz sand, gypsum, foaming agent, additive;

Compared with prior art, the invention has the beneficial effects as follows: unit weight is light; Good heat insulating, building plane usage factor is big; Has machinability; And has excellent fireproof performance.

The specific embodiment

Below in conjunction with the specific embodiment the present invention is described in further detail:

The present invention is made up of lime, cement, flyash or quartz sand, gypsum, foaming agent, additive;

Described quartz sand is CHARACTERISTICS OF TAILINGS SAND; Described foaming agent can be metallic aluminium cream or aluminium powder; Described additive can be spaonin powder or draw back material or benzene seedcake;

Ash aerated concrete match ratio (%): lime 20-23, cement 5-10, flyash 72-63.5, gypsum 3-3.5, aluminium powder 0.068-0.072, spaonin powder 0.068-0.072;

Sand aerated concrete match ratio (%): lime 18-15.5, cement 11-16.5, quartz sand 67.7-64.5, gypsum 3.3-3.5, aluminium powder 0.075-0.08, spaonin powder 0.075-0.08;

Require the lime particle fineness to be controlled at 0.080mm in the air entrained concrete match ratio and tail over≤15%, digestion time is: 8-16 minute, digestion condition was: 68-75 ℃; Cement granules fineness 0.080mm screen cloth≤10%, setting time: initial set h:min 〉=0:45, final set h:min≤10:00; Intensity Mpa resisted folding 〉=2.5, resistance to compression 〉=11.0 in 3 days.

Calcium sulfate CaSO in the gypsum ₄Content 〉=85%, moisture content≤35%.

Solid powder 〉=65% in aluminium cream or the powder, activated aluminum in solid part 〉=85%; Grain fineness 0.075mm tails over≤2%, rate of gas generation 4min50-60%, 16min 〉=90%, 30min 〉=99%; Water dispersible: do not have granule.

Fly ash grain fineness 0.080mm tails over≤12-25%, silica SiO ₂〉=45%, phosphorus content≤5% burns vector≤10%.

Quartz sand particle fineness 0.080mm tails over≤10-18%, silica SiO ₂〉=90%, alundum (Al AL ₂O ₃≤ 1%, magnesia MgO≤1% burns vector≤0.8%, and clay content is burnt vector≤3%.

Quick lime is the main calcareous material of air entrained concrete, and it mainly provides effective calcium oxide (ACaO), makes it to react with silica, aluminium oxide in hydrothermal reaction process, thereby makes goods obtain intensity.

Cement mainly plays in air entrained concrete in the effect of regulating pouring stability and the base substrate hardening process and plays a driving role, and can reduce the shrinkage value of goods.

Flyash, quartz sand (CHARACTERISTICS OF TAILINGS SAND) mainly provide silica (SiO in air entrained concrete ₂) with calcium oxide, aluminium oxide hydro-thermal reaction, make goods obtain intensity.

Gypsum can delay the raising rate of aluminium cream (powder) in air entrained concrete, suppress the thickening time of the digestion time and the prolongation slip of lime, and goods are gained in strength.

Aluminium cream (powder) is got angry under certain slurry temperature in the air entrained concrete cast, produces pore, impels slip to expand, and the weight of supporting slip makes the slip multiviscosisty harden into base substrate.

Additive: in the air entrained concrete cast, play the degreasing of aluminium cream (powder) and the effect of steady bubble, improve pouring stability.

Powder ash air-entrained concrete technology match ratio: (unit: kg)

Lime cement flyash-gypsum aluminium cream (powder) additive

430 120 1350 60 1.30 1.30

390 95 1415 60 1.30 1.30

Sand aerated concrete technology match ratio: (unit: kg)

Lime cement quartz sand (CHARACTERISTICS OF TAILINGS SAND) gypsum aluminium cream (powder) additive

350 210 1330 65 1.43 1.43

300 320 1270 65 1.43 1.43

Remarks: the gypsum in powder ash air-entrained concrete, the sand aerated concrete match ratio all mixes in the slip of preparation in proportion.

Characteristics of the present invention are:

One, unit weight is light

The air entrained concrete product weight is light, can reduce the building deadweight, helps improving the shock resistance of building.General aerated concrete density is 400-700kg/m ³, its weight only is equivalent to 1/3 of clay brick, 1/5 of common brick.

Two, good heat insulating, building plane usage factor is big.

Unit weight is 400-700kg/m ³Air entrained concrete, its thermal conductivity factor is 0.08～0.15 kilocalorie/meter. the time. the degree; Only be the 1/4-1/5 of clay brick thermal conductivity factor, be the 1/5-1/10 of light water adobe; The heat insulation effect of the aerated concrete wall of common 200 millimeters thick is equivalent to the common brick of 490 millimeters thick.

Three, has machinability

The steam-pressing aero-concrete product can saw, dig, bore, follow closely, and available suitable binding material bonds when construction.

Four, fire protecting performance is good.

Five, production efficiency height, energy resource consumption are few

Produce air entrained concrete and can realize high mechanization, automation, the efficiency height.General aero-crete factory, its labor productivity reaches 400m approximately ³/ people. year, and the labor productivity of unselected clay brick field only is 200m ³/ people. year.It is few to produce the air entrained concrete energy resource consumption, shows that according to the graduate data of building materials being worked into the total energy consumption that steams the extrusion still from raw material is 59-75kg mark coal/m ³, and the energy consumption of production clay brick is marked coal/m up to 114kg ³

Claims (5)

1. a steam-pressing aero-concrete is made up of lime, cement, flyash or quartz sand, gypsum, foaming agent, additive.

2. steam-pressing aero-concrete according to claim 1, described quartz sand is CHARACTERISTICS OF TAILINGS SAND; Described foaming agent can be metallic aluminium cream or aluminium powder; Described additive can be spaonin powder or draw back material or benzene seedcake.

3. steam-pressing aero-concrete according to claim 2, wherein match ratio (%): lime 20-23, cement 5-10, flyash 72-63.5, gypsum 3-3.5, aluminium powder 0.068-0.072, spaonin powder 0.068-0.072.

4. steam-pressing aero-concrete according to claim 2, wherein match ratio (%): lime 18-15.5, cement 11-16.5, quartz sand 67.7-64.5, gypsum 3.3-3.5, aluminium powder 0.075-0.08, spaonin powder 0.075-0.08.

5. steam-pressing aero-concrete according to claim 1, the lime particle fineness is controlled at 0.080mm and tails over≤15%, and digestion time is: 8-16 minute, digestion condition was: 68-75 ℃; Cement granules fineness 0.080mm screen cloth≤10%, setting time: initial set h:min 〉=0:45, final set h:min≤10:00; Intensity Mpa resisted folding 〉=2.5, resistance to compression 〉=11.0 in 3 days;

Calcium sulfate CaSO in the gypsum ₄Content 〉=85%, moisture content≤35%;

Solid powder 〉=65% in aluminium cream or the powder, activated aluminum in solid part 〉=85%; Grain fineness 0.075mm tails over≤2%, rate of gas generation 4min50-60%, 16min 〉=90%, 30min 〉=99%; Water dispersible: do not have granule;

Fly ash grain fineness 0.080mm tails over≤12-25%, silica SiO ₂〉=45%, phosphorus content≤5% burns vector≤10%;

Quartz sand particle fineness 0.080mm tails over≤10-18%, silica SiO ₂〉=90%, alundum (Al AL ₂O ₃≤ 1%, magnesia MgO≤1% burns vector≤0.8%, and clay content is burnt vector≤3%.