CN102390968B - Heat insulation fireproofing honeycomb cement board and preparation method thereof - Google Patents

Abstract

The invention belongs to the technical field of building materials and in particular relates to a heat insulation fireproofing cement board and a preparation method thereof. The cement board is made from master batch and auxiliary materials, wherein the master batch is fast hardening sulphate aluminium cement and ordinary Portland cement; and the auxiliary materials are composed of a waterproofing agent, a brightening agent, a foaming agent, a water reducing agent, an accelerating agent, a moisturizing agent, fibres and water. The fireproofing heat insulation honey cement board provided by the invention has the advantages of good fireproofing thermal insulation property, aging resistance, low deformation coefficient, colour approximating to the colour of a wall body and high bonding strength with the wall body; and the preparation method is simple and is convenient to operate.

Description

Heat insulation fireproofing honeycomb cement board and preparation method thereof

Technical field

The invention belongs to building material technical field, particularly a kind of heat insulation fireproofing honeycomb cement board and preparation method thereof.

Background technology

Existing external wall wall heat insulation material usually adopts the organic materialss such as polystyrene foamed plastics, rigid polyurethane fat vacuole foam plastics, although excellent thermal insulation performance, but such lagging material very easily burns, and produce with a large amount of poison gases and flue gas during burning, bring exceptional hardship to rescue work of extinguishing fire, cause casualties and property damage.Simultaneously such organic insulation material also exist easily aging, poor stability, poor durability, with the shortcomings such as the body of wall cohesive strength is low.In the last few years, building fire frequently occurs, people are had higher requirement to the fire resistance of lagging material, inorganic heat insulation material because of have that fire resistance is good, ageing-resistant, deformation coefficient is little and approach with body of wall, with body of wall cohesive strength advantages of higher, cause people's extensive concern.The research and development thermal conductivity replaces styrofoam and extruded sheet less than 0.06w/m.k and the lower honeycomb cement plate of cost, thus solve existing warming plate easily aging, poor stability, poor durability, become a direction of inorganic heat insulation material research with shortcomings such as the body of wall cohesive strength are low.A kind of cellular concrete is provided in Chinese patent application 200710055329.8, can have solved the problem that the material of construction such as present brick or concrete can not satisfy lightweight in building, energy-saving and environmental protection needs.But the problem one that this invention exists is the honeycomb agent of using to be formed complicated, described honeycomb agent is that hydrogen peroxide, water and other material (in trolamine, Quilonum Retard, lithium chloride, boric acid, citric acid, tartrate, calcium lignin sulphonate, sodium lignosulfonate and magnesium lignosulfonate a kind of) form, because hydrogen peroxide has strong oxidizing property, can react with other material, cause the useful effect of hydrogen peroxide and other material to reduce, also be unfavorable for the quality control of cellular concrete material; The 2nd, production technique is unreasonable, can only for the production of building block or body of wall, be difficult to produce density less than 200kg/m ³Sheet material; The 3rd, its thermal conductivity is larger, and by embodiment is measured, thermal conductivity is all greater than 0.08 W/(m.K).Application number is in 200910305328.3 application, to use a large amount of glass beads, has that weight is large, easy broken, shortcoming that water-intake rate is high.

Summary of the invention

The object of the present invention is to provide a kind of heat insulation fireproofing honeycomb cement board and preparation method thereof, described heat insulation fireproofing honeycomb cement board has overcome present inorganic fireproofing insulation material from shortcoming great, that water-intake rate is high, thermal conductivity is large, easy to crack.

The technical solution used in the present invention is as follows:

Heat insulation fireproofing honeycomb cement board is made by masterbatch and auxiliary material, and wherein, the weight of masterbatch is composed as follows:

Quick hardening sulphoaluminate cement: 20-70 part; Ordinary Portland cement: 30-80 part;

The weight of auxiliary material is composed as follows:

Water-resisting agent: 1-3.5 part;

Brightener: 3-5 part;

Whipping agent: 5-12 part;

Water reducer: 0.1-1 part;

Accelerating chemicals: 1-3.5 part;

Wetting Agent for Printing Inks: 0.05-0.3 part;

Fiber: 0.2-1 part;

Water: 42-55 part.

Water-resisting agent is calcium stearate, Zinic stearas, Magnesium Stearate or organosilicon powder.

Described water reducer is calcium lignin sulphonate, sodium lignosulfonate or magnesium lignosulfonate.

Whipping agent is the hydrogen peroxide of mass concentration more than 25%.

Brightener is light calcined magnesia, unslaked lime or wollastonite powder.

Accelerating chemicals is powdery sodium silicate.

Wetting Agent for Printing Inks is carboxymethyl cellulose.

Fiber is the polypropylene fibre of length 3-8mm.

The present invention also provides a kind of preparation method of preferred described heat insulation fireproofing honeycomb cement board, first masterbatch and other auxiliary materials except water, whipping agent is mixed; Add afterwards entry and mix, add whipping agent to mix, foaming forms the honeycomb cement block, cuts apart to obtain the honeycomb cement plate.

Concrete, step is as follows:

1) take in proportion masterbatch and other auxiliary materials except water, whipping agent, mix;

2) take in proportion water, be added to 1) stir 1-5min in the material that mixes and obtain uniform slurry;

3) take in proportion whipping agent, be added to 2) uniformly in slurry, stir 0.5-2min;

4) 3) material that stirs is cast in and begins foaming in mould, and 2-5h forms the honeycomb cement block;

5) on request the honeycomb cement block is divided into the honeycomb cement plate.

The present invention be with quick hardening sulphoaluminate cement, ordinary Portland cement as gelling material, add other auxiliary materials jointly to stir, pour into mould and can form the honeycomb cement block, and the cutting form.The common drinking water of wet concentration described in the present invention, temperature are controlled at 20-45 ℃.

The honeycomb cement plate very high to waterproof requirement can carry out the honeycomb cement plate immersion treatment in organic silicon solution.

The problem that exists in order to solve prior art in the present invention, at first thinking is that technique is adjusted, because the reaction of hydrogen peroxide and cement is very fast, with whipping process after the material such as cement contacts in just begin foaming, not only waste hydrogen peroxide, and there is the inhomogeneous problem of pore opening in the cellular concrete that stirs out, volume density is higher, thermal conductivity strengthens, and therefore first adds the technique of hydrogen peroxide to be difficult to produce density less than 200kg/m ³Sheet material.

From raw material, because reaction between hydrogen peroxide and cement is very fast, can discharge amount of heat, temperature is up to 80 ℃, moisture in this Water Under mud bubble evaporates very soon, cause cement to bubble open the through crack hole, make the product dry shrinkage and cracking, the application solves cement and bubbles open the problem of splitting by adding accelerating chemicals, wetting Agent for Printing Inks and fiber.In addition, the honeycomb cement plate requires the lighter and lower thermal conductivity of weight, and a large amount of in the production of honeycomb cement plate to add the stopping composition such as flyash be disadvantageous to the finished product, and therefore, the application does not add the stopping composition such as flyash.In addition, add that the cellular cellular body that forms is case type after water-resisting agent, water can not permeate wherein, reaches the hydrophobic effect.Heat insulation fireproofing honeycomb cement board main raw of the present invention is comprised of inorganic materials, therefore has uninflammability; Owing to using quick hardening sulphoaluminate cement as gelling material, after cast 4-6 h intensity reached the 60-70% of design grade, the self-support moulding began to harden usually.

The described heat insulation fireproofing honeycomb cement board of the application has the following advantages: early stage bending and compressive strength is high, not retraction of later strength; Do not chap; Making processes is easy.Lightweight, high-strength, high-efficiency insulated, heat insulation, sound insulation, from waterproof, do not fire, shock resistance, shrinking percentage be little, its thermal conductivity can be controlled in 0.03-0.06W/(m.K), ultimate compression strength can change between 0.1-0.8MPa, and volume density can be controlled in 100-200(and may extend to 250) kg/m ³, the diameter that forms the honeycomb foam is 1-5mm, and is disconnected lockedin air space group mutually; After burning 120 min with 900 ℃ of high temperature bakings of blowtorch, lost integrity and heat insulating ability, do not have splendid fire-resistant and heat-proof quality.

Production and construct very convenient, both can produce in factory, again can field fabrication.During construction, energy plane, saw, nail etc. as the fire-blocking belt, can be constructed according to the constructional method of polystyrene board, save to greatest extent construction period; Can support the use with any structural system as wallboard, reduce the weight of buildings, equal area or volume, the weight of product material of the present invention is only 1/8th of brick wall, significantly alleviate load, reduced the bearing capacity of concrete foundation and steel frame, reduced the consumption of other material.

Long service life, the product material weather resistance of made can reach 80 years, and when 200 ℃ of high temperature, 72h is indeformable, and is not aging.And warming plate, double-side color steel plate, interior sandwich styrofoam that present construction market generally adopts, (temperature is at 70 ℃) styrofoam distortion after being heated, color steel namely fades at solar irradiation, wind, the 7-10 that drenches with rain, and has increased the maintenance cost in house.

The present invention has following advantage with respect to prior art:

Fireproof heat insulating honeycomb cement plate provided by the invention, have advantages of lightweight, the fireproof heat insulating performance is good, ageing-resistant, deformation coefficient is little, approach with body of wall, cohesive strength is high; The simple convenient operation of preparation method.

Embodiment

Below with specific embodiment, technical scheme of the present invention is described, but protection scope of the present invention is not limited to this:

The weight proportion of composing of the masterbatch of embodiment 1-10 and auxiliary material sees following table for details:

The honeycomb foam diameter of the fire prevention heatproof honeycomb cement plate that obtains is 1-8mm.

Adopting the concentration of hydrogen peroxide in embodiment is 27.5%.

Cellulosic length is 3-8mm.

All raw materials used are all the commercially available prod.

The preparation method of described fire prevention heatproof honeycomb cement plate comprises the following steps:

(1) take in proportion masterbatch, water-resisting agent, brightener, water reducer, accelerating chemicals, wetting Agent for Printing Inks, fiber, and stir in agitator;

(2) take in proportion water, be added in the material that (1) stir and stir, churning time 1-5 minute, be uniform slurry until stir;

(3) taking in proportion hydrogen peroxide, be added in the slurry that stirs of (2) step, and rapid stirring, stirring velocity turns 800/more than min, churning time 0.5-2 minute, until stir;

(4) material that (3) is stirred in casting mold, begins foaming rapidly, and 2-5h forms the honeycomb cement block;

(5) as requested the honeycomb cement block that reaches some strength is divided into the honeycomb cement plate.

(6) the honeycomb cement plate very high to waterproof requirement can carry out the honeycomb cement plate immersion treatment in organic silicon solution.

After with 900 ℃ of high temperature of blowtorch, 120 min being burnt in embodiment 1-10 product baking, all not lost integrity and heat insulating ability; When 200 ℃ of high temperature, can guarantee that 72h is indeformable, not aging.

Claims (4)

1. heat insulation fireproofing honeycomb cement board, is characterized in that, described cement plate is made by masterbatch and auxiliary material, and wherein, the weight of masterbatch is composed as follows:

Quick hardening sulphoaluminate cement: 20-70 part;

Ordinary Portland cement: 30-80 part;

The weight of auxiliary material is composed as follows:

Water-resisting agent: 1-3.5 part;

Brightener: 3-5 part;

Whipping agent: 5-12 part;

Water reducer: 0.1-1 part;

Accelerating chemicals: 1-3.5 part;

Wetting Agent for Printing Inks: 0.05-0.3 part;

Fiber: 0.2-1 part;

Water: 42-55 part;

Whipping agent is the hydrogen peroxide of mass concentration more than 25%; Water-resisting agent is calcium stearate, Zinic stearas, Magnesium Stearate or organosilicon powder; Described water reducer is calcium lignin sulphonate, sodium lignosulfonate or magnesium lignosulfonate; Brightener is light calcined magnesia, unslaked lime or wollastonite powder; Accelerating chemicals is powdery sodium silicate; Wetting Agent for Printing Inks is carboxymethyl cellulose; Fiber is the polypropylene fibre of length 3-8mm;

The preparation method is as follows: first masterbatch and other auxiliary materials except water, whipping agent are mixed; Add afterwards entry and mix, add whipping agent to mix, foaming forms the honeycomb cement block, cuts apart to obtain the honeycomb cement plate.

2. the preparation method of the described heat insulation fireproofing honeycomb cement board of claim 1, is characterized in that, first masterbatch and other auxiliary materials except water, whipping agent mixed; Add afterwards entry and mix, add whipping agent to mix, foaming forms the honeycomb cement block, cuts apart to obtain the honeycomb cement plate.

3. the preparation method of heat insulation fireproofing honeycomb cement board as claimed in claim 2, is characterized in that, step is as follows:

1) take in proportion masterbatch and other auxiliary materials except water, whipping agent, mix;

2) take in proportion water, be added to 1) stir 1-5min in the material that mixes and obtain uniform slurry;

3) take in proportion whipping agent, be added to 2) uniformly in slurry, stir 0.5-2min;

4) 3) material that stirs is cast in and begins foaming in mould, and 2-5h forms the honeycomb cement block;

5) on request the honeycomb cement block is divided into the honeycomb cement plate.

4. the preparation method of heat insulation fireproofing honeycomb cement board as claimed in claim 3, is characterized in that, the honeycomb cement plate carried out immersion treatment in organic silicon solution.