CN104829191A - High hardness thermal insulation plant fiber cement composite strip plate and producing method thereof - Google Patents

Abstract

The invention discloses a high hardness thermal insulation plant fiber cement composite strip plate made from the following raw materials by weight: 25-35 parts of plant fiber, 20-30 parts of Portland cement, 40-44 parts of fly ash, 10-13 parts of infrared ceramic powder, 0.2-0.4 part of sodium lignin sulfonate, 0.3-0.5 part of calcium sulfate, 0.4-0.8 part of lanthanum oxide, 11-15 parts of silica sol, 0.5-0.7 part of monoethanolamine, 16-18 parts of poly vinyl acetate emulsion, 6-9 parts of paraffin oil, and proper amount of water; the high hardness thermal insulation plant fiber cement composite strip plate has high strength, high hardness, high smoothness, thermal insulation and other features.

Description

A kind of high rigidity insulation plant fiber-cement composite strip plate and preparation method thereof

Technical field

The present invention relates to material of construction material technical field, be specifically related to a kind of high rigidity insulation plant fiber-cement composite strip plate and preparation method thereof.

Background technology

Since entering the nineties, in the selection of living environment, people have been not content with general has it to occupy, but is pursuing material of construction and the new building materials of environmental harmony type with natural characteristic.Environmental harmony type building materials must meet heat preservation energy-saving, sound absorption sound insulation, water-proof fire-retardant, nonpoisonous and tasteless, lightweight, the characteristic such as high-strength, safe, plant fiber-cement composite strip plate is exactly a kind of novel environmental harmony type material of construction, selected vegetable fibre refers to annual fiber, mainly refers to that agricultural crop straw is as corn stalk, straw, cotton stem, waste of flax etc.

At China's yearly plant abundance, be inexhaustible, nexhaustible raw material, their lifetime is shorter, does not have too large purposes after withered.These agricultural crop straws through cut off hammer broken after obtained vegetable fibre feature be that length-to-diameter ratio is large, specific tenacity is high, specific surface area is large, density is low and biodegradable, have that cost is low, tensile strength advantages of higher in addition, replace timber to make cementitious composite batten strongthener, in use unharmful substance and obnoxious flavour generate.

But the alkaline attack effect of vegetable fibre extract to the anticoagulation of cement and cement-hydrate all limits the application of plant fiber-cement composite strip plate, show: the high alkalinity liquid phase in cement matrix hole has erosion action to vegetable fibre, thus affects the weather resistance of composite strip plate; Vegetable fibre has very high water-intake rate, the declining to a great extent of flexural tensile strength and Young's modulus after volume change can be caused to cause plant fiber-cement composite strip plate to make moist, and composite strip plate is distorted distortion, even ftractures; Vegetable fibre because there is depolymerization, making its polymerization degree decline and causing the corresponding reduction of its tensile strength under microbial process.For solving the problems of the prior art, need to carry out modification to existing plant fibre surface and reduce the alkalescence of gelling material.

Summary of the invention

Object of the present invention is just to provide a kind of high rigidity insulation plant fiber-cement composite strip plate and preparation method thereof, to overcome the deficiencies in the prior art.

The object of the present invention is achieved like this:

A kind of high rigidity insulation plant fiber-cement composite strip plate, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 25-35, silicate cement 20-30, flyash 40-44, infrared ceramic powder 10-13, sodium lignosulfonate 0.2-0.4, calcium sulfate 0.3-0.5, lanthanum trioxide 0.4-0.8, silicon dioxide gel 11-15, monoethanolamine 0.5-0.7, polyvinyl acetate emulsion 16-18, paraffin oil 6-9, water are appropriate.

The preparation method of described a kind of high rigidity insulation plant fiber-cement composite strip plate, is characterized in that comprising the following steps:

(1) within baking oven about 3-4 hour that vegetable fibre is put into 105 DEG C, dry, room temperature is dried, rap that to remove to pectin and be crushed to diameter be 3-6mm again with skin hammer, being placed on mass concentration is soak 24 hours in the polyvinyl acetate emulsion of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific paraffin oil, dries;

(2) infrared ceramic powder is calcined 1-2 hour at 610-690 DEG C, cooling adds flyash agitation grinding 30-40 minute, add lanthanum trioxide and be warming up to 190-260 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add silicon dioxide gel to continue to stir 3-5 minute, be cooled to room temperature, dry porphyrize;

(3) calcium sulfate be dissolved in water and stir 10-15 minute, add step (1), (2) reaction mass stirring and evenly mixing, add silicate cement and other remaining components again and stir 20-30 minute, it is shaping to add forming machine, obtains finished product successively after 20-30h through cutting, the demoulding, natural curing.

The present invention has following beneficial effect: the level of comprehensive utilization that invention increases vegetable fibre, reduce because waste resource deals with the grievous injury caused improperly, first polyvinyl acetate emulsion dip treating technique is taked to make the surfaces externally and internally of vegetable fibre be enclosed with one layer of polymeric film to plant fibre surface pre-treatment, spray vaporific paraffin oil again, make whole fibre dense and obtain certain rigidity, and water tolerance improves; Secondly flyash is added and in addition modification replaces part of cement, the growing amount of calcium hydroxide after minimizing aquation, improve the corrosion resistance of vegetable fibre, choose the water cement ratio of 0.42 simultaneously, obtained plant fiber-cement composite strip plate has the features such as high strength, high rigidity, high-flatness, insulation.

Embodiment

Described a kind of high rigidity insulation plant fiber-cement composite strip plate, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 35, silicate cement 24, flyash 42, infrared ceramic powder 12, sodium lignosulfonate 0.3, calcium sulfate 0.4, lanthanum trioxide 0.6, silicon dioxide gel 12, monoethanolamine 0.6, polyvinyl acetate emulsion 17, paraffin oil 8, water are appropriate.

Making method comprises the following steps:

(1) within baking oven about 3-4 hour that vegetable fibre is put into 105 DEG C, dry, room temperature is dried, rap that to remove to pectin and be crushed to diameter be 3-6mm again with skin hammer, being placed on mass concentration is soak 24 hours in the polyvinyl acetate emulsion of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific paraffin oil, dries;

(2) infrared ceramic powder is calcined 1-2 hour at 610-690 DEG C, cooling adds flyash agitation grinding 30-40 minute, add lanthanum trioxide and be warming up to 190-260 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add silicon dioxide gel to continue to stir 3-5 minute, be cooled to room temperature, dry porphyrize;

(3) calcium sulfate be dissolved in water and stir 10-15 minute, add step (1), (2) reaction mass stirring and evenly mixing, add silicate cement and other remaining components again and stir 20-30 minute, it is shaping to add forming machine, obtains finished product successively after 20-30h through cutting, the demoulding, natural curing.

The technical parameter index of the plant fiber-cement composite strip plate using the present invention to produce is as follows:

(1) tensile splitting strength of maintenance 28d improves 23.56%;

(2) bending strength of maintenance 28d improves 15.68%;

(3) thermal conductivity (medial temperature 25 ± 2 DEG C): 0.076W/ (mk).

Claims (2)

1. a high rigidity insulation plant fiber-cement composite strip plate, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 25-35, silicate cement 20-30, flyash 40-44, infrared ceramic powder 10-13, sodium lignosulfonate 0.2-0.4, calcium sulfate 0.3-0.5, lanthanum trioxide 0.4-0.8, silicon dioxide gel 11-15, monoethanolamine 0.5-0.7, polyvinyl acetate emulsion 16-18, paraffin oil 6-9, water are appropriate.

2. the making method of a kind of high rigidity insulation plant fiber-cement composite strip plate according to claim 1, is characterized in that comprising the following steps:

(1) within baking oven about 3-4 hour that vegetable fibre is put into 105 DEG C, dry, room temperature is dried, rap that to remove to pectin and be crushed to diameter be 3-6mm again with skin hammer, being placed on mass concentration is soak 24 hours in the polyvinyl acetate emulsion of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific paraffin oil, dries;

(2) infrared ceramic powder is calcined 1-2 hour at 610-690 DEG C, cooling adds flyash agitation grinding 30-40 minute, add lanthanum trioxide and be warming up to 190-260 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add silicon dioxide gel to continue to stir 3-5 minute, be cooled to room temperature, dry porphyrize;

(3) calcium sulfate be dissolved in water and stir 10-15 minute, add step (1), (2) reaction mass stirring and evenly mixing, add silicate cement and other remaining components again and stir 20-30 minute, it is shaping to add forming machine, obtains finished product successively after 20-30h through cutting, the demoulding, natural curing.