CN105060806A - Lightweight plant fiber cement composite ribbon board with excellent bending resistance and manufacturing method thereof - Google Patents

Abstract

The invention discloses a lightweight plant fiber cement composite ribbon board with excellent bending resistance. According to the invention, a butadiene styrene rubber emulsion 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 butadiene styrene rubber emulsion 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 light weight, high strength, excellent bending resistance, good compaction resistance, long duration, etc., and meets building requirements of homes, offices, etc.

Description

Plant fiber-cement composite strip plate of a kind of lightweight resistance to bending excellence and preparation method thereof

Technical field

The present invention relates to material of construction material technical field, be specifically related to plant fiber-cement composite strip plate of a kind of lightweight resistance to bending excellence 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 plant fiber-cement composite strip plate of a kind of lightweight resistance to bending excellence 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 plant fiber-cement composite strip plate of lightweight resistance to bending excellence, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 30-35, silicate cement 25-35, flyash 40-45, algae clay 10-12, coal gangue 20-25, glass fibre 8-13, Sodium Pyrosulfite 0.1-0.3, cerium dioxide 0.7-1.3, sodium carbonate 0.5-0.9, SBR emulsion 14-17, trolamine 0.4-0.7, epoxy soybean oil 5-8, silicone emulsion 6-10, water are appropriate.

The preparation method of the plant fiber-cement composite strip plate of described a kind of lightweight resistance to bending excellence, 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 SBR emulsion of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific epoxy soybean oil, dries;

(2) algae clay, coal gangue are calcined 1-2 hour at 575-685 DEG C, cooling adds flyash agitation grinding 30-40 minute, add cerium dioxide and be warming up to 200-260 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add silicone emulsion, 13-15 minute is stirred in trolamine continuation, be cooled to room temperature, dry porphyrize;

(3) sodium carbonate 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 SBR 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 SBR emulsion 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, the advantages such as obtained plant fiber-cement composite strip plate light weight intensity is high, resistance to bending is excellent, crushing resistance good, weather resistance is long, are very suitable for the building requirements in the place such as household, office.

Embodiment

The plant fiber-cement composite strip plate of described a kind of lightweight resistance to bending excellence, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 34, silicate cement 29, flyash 43, algae clay 11, coal gangue 23, glass fibre 8, Sodium Pyrosulfite 0.1, cerium dioxide 1.2, sodium carbonate 0.7, SBR emulsion 15, trolamine 0.6, epoxy soybean oil 5, silicone emulsion 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 SBR emulsion of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific epoxy soybean oil, dries;

(2) algae clay, coal gangue are calcined 1-2 hour at 575-685 DEG C, cooling adds flyash agitation grinding 30-40 minute, add cerium dioxide and be warming up to 200-260 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add silicone emulsion, 13-15 minute is stirred in trolamine continuation, be cooled to room temperature, dry porphyrize;

(3) sodium carbonate 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) bending strength of maintenance 28d improves 16.47%;

(2) fracture toughness value improves 62.24%;

(3) relative impact intensity improves 30.13%.

Claims (2)

1. the plant fiber-cement composite strip plate of a lightweight resistance to bending excellence, it is characterized in that, be made up of the raw material of following weight part: vegetable fibre 30-35, silicate cement 25-35, flyash 40-45, algae clay 10-12, coal gangue 20-25, glass fibre 8-13, Sodium Pyrosulfite 0.1-0.3, cerium dioxide 0.7-1.3, sodium carbonate 0.5-0.9, SBR emulsion 14-17, trolamine 0.4-0.7, epoxy soybean oil 5-8, silicone emulsion 6-10, water are appropriate.

2. the making method of the plant fiber-cement composite strip plate of a kind of lightweight resistance to bending excellence 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 SBR emulsion of 10%, press dry post-drying, air blast to the state of seething sprays into vaporific epoxy soybean oil, dries;

(2) algae clay, coal gangue are calcined 1-2 hour at 575-685 DEG C, cooling adds flyash agitation grinding 30-40 minute, add cerium dioxide and be warming up to 200-260 DEG C of stirring 5-10 minute, be cooled to 50-80 DEG C, add silicone emulsion, 13-15 minute is stirred in trolamine continuation, be cooled to room temperature, dry porphyrize;

(3) sodium carbonate 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.