CN105060819A - Environmental-friendly concrete pipe pile and preparation method therefor - Google Patents

Abstract

The invention discloses an environmental-friendly concrete pipe pile. According to the concrete pipe pile, ethoxylated rubber fiber is doped, so that an internal pore structure of concrete is effectively improved to form a large number of closed pores so as to prevent capillary pores from forming a continuous mesh architecture. An "anti-carbonation zone" is formed to have a further reinforcing effect in inhibiting intrusion of carbon dioxide. In addition, harmful pores and defect content of the concrete structure can be reduced, thereby lowering the alkalinity of a hydration product, and promoting conversion from a low-intensity hydration product to a high-intensity product.

Description

A kind of environment-friendly concrete pile tube and preparation method thereof

Technical field

The present invention relates to a kind of environment-friendly concrete pile tube, particularly relate to a kind of environment-friendly concrete pile tube and preparation method thereof.

Background technology

Concrete structure is one of structure be most widely used, the have an appointment building construction of 70% and the bridge structure of 50% of China have employed concrete structure. along with the growth of these engineering structures duration of service, the durability damage of concrete material and structure more and more comes into one's own, many engineering structures are often because the reason of weather resistance causes using function to degenerate even structure deteriorate, unnecessary loss is brought to society. concrete carbonization is one of important durability index of concrete, due to the carbonic acid gas in air and the alkali substance reaction in concrete, namely the process making concrete present neutralisation is called concrete carbonization, carbonization makes the reinforcing bar in concrete structure lose the protection of passive film, reinforcing bar is very easily made to get rusty, and then structure is destroyed. along with the continuous propelling of process of industrialization, the quantity discharged of carbonic acid gas increases, while generation Greenhouse effect, also disadvantageous effect is created to the weather resistance of concrete structure,

The present invention wants to adopt waste and old rubber powder as modified filler, reduce concrete carbonization, but first rubber particle surface is nonpolar, cement matrix is polarity, both consistencies are poor, under surface tension effects, cement slurry is subject to the tension force deviating from rubber particle surface, rubber and grout bonding surface is made to produce crack, this crack makes concrete density reduce, and provides passage more easily also to the intrusion of carbonic acid gas simultaneously, enhances carbonization effect on the contrary, therefore to reduce carbonization, first will carry out modification to rubber surface.

Summary of the invention

Instant invention overcomes prior art deficiency, provide one and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of environment-friendly concrete pile tube, it is made up of the raw material of following weight parts:

Maleic anhydride 5-6, n-methyl-2-pyrrolidone 7-10, ordinary Portland cement 500-640, yellow ground 300-400, rubble 200-300, polycarboxylate water-reducer 7-15, polyethylene wax 16-20, poly glycol monomethyl ether 2-3, sp-800.7-2, waste rubber powder 50-70, dibenzoyl peroxide 0.1-0.2, borax 5-10, urea 1-2, powdered rice hulls 17-20, calcium aluminate 3-6, lauryl dimethyl amine oxide 0.6-2, allyl polyglycol 2.7-4, magnesium borate 2-3, alkyl ketene dimer 2-3, vinyl carboxylate 0.8-1.

2, a preparation method for environment-friendly concrete pile tube as claimed in claim 1, is characterized in that comprising the following steps:

(1) abovementioned alkyl ketene dimer is joined in 4-6 times of dehydrated alcohol, stir, add allyl polyglycol, polyethylene wax, send in the oil bath of 100-105 DEG C, insulated and stirred 7-10 minute, discharging cools, the de-ethanol of distillation, obtains pre-modified polyethylene wax;

(2) above-mentioned lauryl dimethyl amine oxide is joined in 10-15 times of deionized water, stir, add calcium aluminate, borax, 60-100 rev/min is stirred 10-20 minute, adds vinyl carboxylate, waste rubber powder, is heated to boiling, drip urea, after dropwising, be stirred to water under preserving boiling condition and do, obtain modified rubber powder;

(3) above-mentioned pre-modified polyethylene wax is joined in its weight 3-4 No. 3 white oils doubly, add dibenzoyl peroxide, maleic anhydride, insulated and stirred 2-3 hour at 130-140 DEG C, discharging is cooled to normal temperature, join in cooling material weight 2-3 acetone doubly, fully stir, filter, drying, obtains modified polyethylene wax;

(4) modified rubber is joined in n-methyl-2-pyrrolidone, stir, obtain modified rubber liquid;

(5) get above-mentioned modified polyethylene wax, add poly glycol monomethyl ether, 60-100 rev/min is stirred 3-5 minute, adds above-mentioned mixed system weight 1.8-2 No. 3 white oils doubly, insulated and stirred 3-4 hour at 80-90 DEG C, suction filtration, dry, obtains oxyethyl group polyethylene wax;

(6) oxyethyl group polyethylene wax is joined in 10-12 times of deionized water, add sp-80, stir, add above-mentioned modified rubber liquid, insulated and stirred 20-30 minute in the water-bath of 80-90 DEG C, reduction temperature is 30-40 DEG C, adds triethylamine, continues insulated and stirred 1-2 hour, discharging cools, press filtration, dries, obtains ethoxylation rubber;

(7) use establishment machinery to weave Steel Reinforcement Cage, load after Steel Reinforcement Cage establishment in the pipe pile die of required type, make reinforced tube pile die;

(8) ethoxylation rubber is sent in stirrer, add each raw material of residue, add suitable quantity of water; stir, be injected in above-mentioned reinforced tube pile die, install mould lid; carry out stretch-draw, centrifugal, concrete pipe forming pile, atmospheric steam curing; control thermostat temperature is 75-85 DEG C, and curing time is 6-10 hour, the demoulding; put into autoclave, carry out autoclave curing, constant-pressure pressure is 0.8-0.9Mpa; cooling, obtains described environment-friendly concrete pile tube.

Advantage of the present invention is:

Oxyethyl group polyethylene wax in the present invention be first polyethylene wax molecular chain on to be formed with maleic anhydride molecule and hang together structure, thus polar group-COOH is introduced on polyethylene wax molecular chain, then the carboxyl introduced in the molecule by graft modification with poly glycol monomethyl ether carries out esterification, a certain amount of oxyethyl group is introduced at the side chain of grafting wax after esterification, further increase the wetting ability of polyethylene wax, be conducive to carrying out emulsification with tensio-active agent to it, obtain stable wax emulsion, simultaneously, maleic anhydride is polar molecule, polyethylene wax after ethoxylation also has good surface polarity, after rubber liquid blending and modifying, the nonpolar property on waste and old rubber particle surface can be improved, strengthen the consistency with cement matrix, reduce the tension force on surface, make rubber and grout bonding surface more closely knit, improve intensity and the resistance of formation of concrete, thus prevent the intrusion of carbonic acid gas, reduce carbonization effect, simultaneously because mixing of ethoxylation rubber fibre can effectively improve inside concrete pore structure, form a large amount of closed pores, thus stop pore to form continuously through reticulated structure system, formed together " anti-carbonization zone ", further reinforced effects is served to suppressing the intrusion of carbonic acid gas, harmful hole and defect content in concrete structure can be reduced in addition, reduce the alkalescence of hydrated product, low strength hydrated product is impelled to change to high strength hydrated product,

The concrete tubular pile feature of environmental protection of the present invention is good, also pollution-free to soil, and without obnoxious flavour volatilization in construction process, remain without toxic substance, technique is simple.

Embodiment

Below in conjunction with embodiment, the present invention is described in further detail:

Embodiment 1:

A kind of environment-friendly concrete pile tube, it is made up of the raw material of following weight parts:

Maleic anhydride 5, n-methyl-2-pyrrolidone 10, ordinary Portland cement 640, yellow ground 400, rubble 200, polycarboxylate water-reducer 7, polyethylene wax 20, poly glycol monomethyl ether 2, sp-800.7, waste rubber powder 70, dibenzoyl peroxide 0.2, borax 10, urea 1, powdered rice hulls 20, calcium aluminate 3, lauryl dimethyl amine oxide 0.6, allyl polyglycol 2.7, magnesium borate 2, alkyl ketene dimer 2, vinyl carboxylate 0.8.

A preparation method for environment-friendly concrete pile tube, comprises the following steps:

(1) joined in 4 times of dehydrated alcohols by abovementioned alkyl ketene dimer, stir, add allyl polyglycol, polyethylene wax, send in the oil bath of 105 DEG C, insulated and stirred 10 minutes, discharging cools, and the de-ethanol of distillation, obtains pre-modified polyethylene wax;

(2) above-mentioned lauryl dimethyl amine oxide is joined in 15 times of deionized waters, stir, add calcium aluminate, borax, 100 revs/min are stirred 20 minutes, add vinyl carboxylate, waste rubber powder, are heated to boiling, drip urea, after dropwising, be stirred to water under preserving boiling condition and do, obtain modified rubber powder;

(3) above-mentioned pre-modified polyethylene wax is joined in No. 3 white oils of its weight 3 times, add dibenzoyl peroxide, maleic anhydride, insulated and stirred 3 hours at 140 DEG C, discharging is cooled to normal temperature, join in the acetone of cooling material weight 3 times, fully stir, filter, drying, obtains modified polyethylene wax;

(4) modified rubber is joined in n-methyl-2-pyrrolidone, stir, obtain modified rubber liquid;

(5) get above-mentioned modified polyethylene wax, add poly glycol monomethyl ether, 100 revs/min are stirred 3 minutes, add No. 3 white oils of above-mentioned mixed system weight 1.8 times, insulated and stirred 3 hours at 90 DEG C, suction filtration, dry, obtain oxyethyl group polyethylene wax;

(6) oxyethyl group polyethylene wax is joined in 12 times of deionized waters, add sp-80, stir, add above-mentioned modified rubber liquid, insulated and stirred 20 minutes in the water-bath of 90 DEG C, reducing temperature is 40 DEG C, adds triethylamine, continues insulated and stirred 2 hours, discharging cools, press filtration, dries, obtains ethoxylation rubber;

(7) use establishment machinery to weave Steel Reinforcement Cage, load after Steel Reinforcement Cage establishment in the pipe pile die of required type, make reinforced tube pile die;

(8) ethoxylation rubber is sent in stirrer, add each raw material of residue, add suitable quantity of water; stir, be injected in above-mentioned reinforced tube pile die, install mould lid; carry out stretch-draw, centrifugal, concrete pipe forming pile, atmospheric steam curing; controlling thermostat temperature is 85 DEG C, and curing time is 10 hours, the demoulding; put into autoclave, carry out autoclave curing, constant-pressure pressure is 0.9Mpa; cooling, obtains described environment-friendly concrete pile tube.

Performance test:

The average seepage pressure 1.1mpa of impervious detection, average infiltration height 20mm;

Freeze-thaw-circulation reaches more than 500 times;

Sulphate-corrosion resistance can reach more than K120; 9

Ultimate compression strength is 92.8MPa;

Chloride diffusion coefficient is 6.1 × 10 ^-11cm ²/ s, perviousness can be ignored.

Claims (2)

1. an environment-friendly concrete pile tube, is characterized in that what it was made up of the raw material of following weight parts:

Maleic anhydride 5-6, n-methyl-2-pyrrolidone 7-10, ordinary Portland cement 500-640, yellow ground 300-400, rubble 200-300, polycarboxylate water-reducer 7-15, polyethylene wax 16-20, poly glycol monomethyl ether 2-3, sp-800.7-2, waste rubber powder 50-70, dibenzoyl peroxide 0.1-0.2, borax 5-10, urea 1-2, powdered rice hulls 17-20, calcium aluminate 3-6, lauryl dimethyl amine oxide 0.6-2, allyl polyglycol 2.7-4, magnesium borate 2-3, alkyl ketene dimer 2-3, vinyl carboxylate 0.8-1.

2. a preparation method for environment-friendly concrete pile tube as claimed in claim 1, is characterized in that comprising the following steps:

(1) abovementioned alkyl ketene dimer is joined in 4-6 times of dehydrated alcohol, stir, add allyl polyglycol, polyethylene wax, send in the oil bath of 100-105 DEG C, insulated and stirred 7-10 minute, discharging cools, the de-ethanol of distillation, obtains pre-modified polyethylene wax;

(2) above-mentioned lauryl dimethyl amine oxide is joined in 10-15 times of deionized water, stir, add calcium aluminate, borax, 60-100 rev/min is stirred 10-20 minute, adds vinyl carboxylate, waste rubber powder, is heated to boiling, drip urea, after dropwising, be stirred to water under preserving boiling condition and do, obtain modified rubber powder;

(3) above-mentioned pre-modified polyethylene wax is joined in its weight 3-4 No. 3 white oils doubly, add dibenzoyl peroxide, maleic anhydride, insulated and stirred 2-3 hour at 130-140 DEG C, discharging is cooled to normal temperature, join in cooling material weight 2-3 acetone doubly, fully stir, filter, drying, obtains modified polyethylene wax;

(4) modified rubber is joined in n-methyl-2-pyrrolidone, stir, obtain modified rubber liquid;

(5) get above-mentioned modified polyethylene wax, add poly glycol monomethyl ether, 60-100 rev/min is stirred 3-5 minute, adds above-mentioned mixed system weight 1.8-2 No. 3 white oils doubly, insulated and stirred 3-4 hour at 80-90 DEG C, suction filtration, dry, obtains oxyethyl group polyethylene wax;

(6) oxyethyl group polyethylene wax is joined in 10-12 times of deionized water, add sp-80, stir, add above-mentioned modified rubber liquid, insulated and stirred 20-30 minute in the water-bath of 80-90 DEG C, reduction temperature is 30-40 DEG C, adds triethylamine, continues insulated and stirred 1-2 hour, discharging cools, press filtration, dries, obtains ethoxylation rubber;

(7) use establishment machinery to weave Steel Reinforcement Cage, load after Steel Reinforcement Cage establishment in the pipe pile die of required type, make reinforced tube pile die;

(8) ethoxylation rubber is sent in stirrer, add each raw material of residue, add suitable quantity of water; stir, be injected in above-mentioned reinforced tube pile die, install mould lid; carry out stretch-draw, centrifugal, concrete pipe forming pile, atmospheric steam curing; control thermostat temperature is 75-85 DEG C, and curing time is 6-10 hour, the demoulding; put into autoclave, carry out autoclave curing, constant-pressure pressure is 0.8-0.9Mpa; cooling, obtains described environment-friendly concrete pile tube.