CN104909656A - High temperature resistant vegetable fiber cement composite strip plate and producing method thereof - Google Patents

Abstract

The present invention discloses a high temperature resistant vegetable fiber cement composite strip plate comprising the following raw materials by weight: 26-33 parts of vegetable fiber, 20-25 parts of Portland cement, 35-40 parts of fly ash, 12-14 parts of river sand, 8-11 parts of zeolite, 17-20 parts of carbide slag, 0.4-0.8 part of zirconia, 0.2-0.5 part of ammonium molybdate, 0.3-0.6 part of calcium nitrite, 8-11 parts of butyl benzyl phthalate, 14-18 parts of VAE emulsion, 4-7 parts of rice bran oil and proper amount of water; the high temperature resistant vegetable fiber cement composite strip plate has the characteristics of being high-temperature-resistant, high in strength, seismic, non-deformation,and the like, and ha the good workability of being cut, nailed, planed, drilled and bonded.

Description

A kind of high temperature resistant 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 temperature resistant 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 crop stalk 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 crop stalks 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 temperature resistant 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 temperature resistant plant fiber-cement composite strip plate, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 26-33, silicate cement 20-25, flyash 35-40, river sand 12-14, zeolite 8-11, carbide slag 17-20, zirconium white 0.4-0.8, ammonium molybdate 0.2-0.5, calcium nitrite 0.3-0.6, butyl benzyl phthalate 8-11, VAE emulsion 14-18, Rice pollard oil 4-7, water are appropriate.

The preparation method of described a kind of high temperature resistant 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 VAE emulsion of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific Rice pollard oil, dries;

(2) zeolite, carbide slag are calcined 1-2 hour at 620-695 DEG C, cooling adds flyash, river sand agitation grinding 30-40 minute, add zirconium white and be warming up to 210-260 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add butyl benzyl phthalate to continue to stir 13-15 minute, be cooled to room temperature, dry porphyrize;

(3) calcium nitrite 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 stirring 20-30 minute again, add forming machine shaping, after 20-30h, obtain finished product through cutting, the demoulding, natural curing successively.

The present invention has following beneficial effect: it is easy that the present invention prepares simple operations, first VAE 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 Rice pollard 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 have high temperature resistant, intensity is high, antidetonation, the feature such as indeformable, have concurrently can saw, can cut, follow closely, dig, bore and the good processability such as bonding simultaneously.

Embodiment

Described one is high temperature resistant plant fiber-cement composite strip plate, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 30, silicate cement 23, flyash 40, river sand 13, zeolite 8, carbide slag 18, zirconium white 0.6, ammonium molybdate 0.3, calcium nitrite 0.5, butyl benzyl phthalate 8, VAE emulsion 16, Rice pollard oil 7, 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 VAE emulsion of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific Rice pollard oil, dries;

(2) zeolite, carbide slag are calcined 1-2 hour at 620-695 DEG C, cooling adds flyash, river sand agitation grinding 30-40 minute, add zirconium white and be warming up to 210-260 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add butyl benzyl phthalate to continue to stir 13-15 minute, be cooled to room temperature, dry porphyrize;

(3) calcium nitrite 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 stirring 20-30 minute again, add forming machine shaping, after 20-30h, obtain finished product through cutting, the demoulding, natural curing successively.

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

(1) fracture toughness value improves 58.68%;

(2) relative impact intensity improves 27.57%;

(3) thermal conductivity (medial temperature 25 ± 2 DEG C): 0.074W/ (mk).

Claims (2)

1. a high temperature resistant plant fiber-cement composite strip plate, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 26-33, silicate cement 20-25, flyash 35-40, river sand 12-14, zeolite 8-11, carbide slag 17-20, zirconium white 0.4-0.8, ammonium molybdate 0.2-0.5, calcium nitrite 0.3-0.6, butyl benzyl phthalate 8-11, VAE emulsion 14-18, Rice pollard oil 4-7, water are appropriate.

2. the making method of a kind of high temperature resistant 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 VAE emulsion of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific Rice pollard oil, dries;

(2) zeolite, carbide slag are calcined 1-2 hour at 620-695 DEG C, cooling adds flyash, river sand agitation grinding 30-40 minute, add zirconium white and be warming up to 210-260 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add butyl benzyl phthalate to continue to stir 13-15 minute, be cooled to room temperature, dry porphyrize;

(3) calcium nitrite 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 stirring 20-30 minute again, add forming machine shaping, after 20-30h, obtain finished product through cutting, the demoulding, natural curing successively.