CN105060808A - Acid and alkali resistant plant fiber cement composite ribbon board and manufacturing method thereof - Google Patents

Abstract

The invention discloses an acid and alkali resistant plant fiber cement composite ribbon board. According to the invention, an aqueous methyl-etherified amino resin dipping treatment process is employed to pretreat the surfaces of plant fiber so as to allow the internal and external surfaces of the plant fiber to be coated with a polymer film, then mist-like drainage oil is sprinkled, so the entire fiber is compact, obtains certain rigidity and has improved water resistance; and then fly ash is added to modify and replace a part of cement, so the generation amount of hydrated calcium hydrate is decreased, and corrosion resistance of the plant fiber is improved. The prepared plant fiber cement composite ribbon board has the advantages of thermal insulation performance, crack resistance, impact resistance, resistance to acid and alkali corrosion, rapid and convenient construction, low cost, etc., may be in a shape of a flat, a curved surface, a spherical surface, a warped structure or the like, and integrates bearing and thermal insulation properties together.

Description

A kind of acidproof alkaline 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 acidproof alkaline 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 acidproof alkaline 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 acidproof alkaline plant fiber-cement composite strip plate, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 25-30, silicate cement 20-30, FDN high efficiency water reducing agent 0.1-0.3, flyash 45-50, dickite 10-13, magnesium slag 12-15, Magnesium Stearate 0.2-0.4, urea 1-2, aramid fiber 5-8, quadrol 0.3-0.5, dioctyl sebacate 8-10, water-based methyl-etherified aminoresin 18-20, sewer oil 4-7, water are appropriate.

The preparation method of described a kind of acidproof alkaline 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 water-based methyl-etherified aminoresin of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific sewer oil, dries;

(2) dickite, magnesium slag are calcined 1-2 hour at 600-685 DEG C, cooling adds flyash agitation grinding 30-40 minute, add Magnesium Stearate and be warming up to 180-230 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add dioctyl sebacate to continue to stir 5-10 minute, be cooled to room temperature, dry porphyrize;

(3) urea 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: it is easy that the present invention prepares simple operations, first water-based methyl-etherified aminoresin 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 sewer 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 light weight has that insulation, cracking resistance, shock resistance, acid-alkali-corrosive-resisting, construction are quick and convenient, low cost and other advantages, its shape can be made into flat board, curved surface, sphere and sticks up the shapes such as body structure, load bearing heat preserving integration.

Embodiment

Described one acidproof alkaline 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, silicate cement 28, FDN high efficiency water reducing agent 0.2, flyash 47, dickite 12, magnesium slag 14, Magnesium Stearate 0.3, urea 1, aramid fiber 6, quadrol 0.3, dioctyl sebacate 9, water-based methyl-etherified aminoresin 19, sewer oil 5, 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 water-based methyl-etherified aminoresin of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific sewer oil, dries;

(2) dickite, magnesium slag are calcined 1-2 hour at 600-685 DEG C, cooling adds flyash agitation grinding 30-40 minute, add Magnesium Stearate and be warming up to 180-230 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add dioctyl sebacate to continue to stir 5-10 minute, be cooled to room temperature, dry porphyrize;

(3) urea 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 23.54%;

(2) bending strength of maintenance 28d improves 16.47%;

(3) relative impact intensity improves 29.12%;

(4) thermal conductivity (medial temperature 25 ± 2 DEG C): 0.073W/ (mk).

Claims (2)

1. an acidproof alkaline plant fiber-cement composite strip plate, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 25-30, silicate cement 20-30, FDN high efficiency water reducing agent 0.1-0.3, flyash 45-50, dickite 10-13, magnesium slag 12-15, Magnesium Stearate 0.2-0.4, urea 1-2, aramid fiber 5-8, quadrol 0.3-0.5, dioctyl sebacate 8-10, water-based methyl-etherified aminoresin 18-20, sewer oil 4-7, water are appropriate.

2. the making method of a kind of acidproof alkaline 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 water-based methyl-etherified aminoresin of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific sewer oil, dries;

(2) dickite, magnesium slag are calcined 1-2 hour at 600-685 DEG C, cooling adds flyash agitation grinding 30-40 minute, add Magnesium Stearate and be warming up to 180-230 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add dioctyl sebacate to continue to stir 5-10 minute, be cooled to room temperature, dry porphyrize;

(3) urea 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.