CN105016682A - Concrete pipe pile and preparation method thereof - Google Patents

Abstract

The invention discloses a concrete pipe pile which is prepared from the following raw materials in parts by weight: 500-640 parts of common silicate cement, 300-400 parts of yellow sand, 200-300 parts of gravels, 14-20 parts of aluminum phosphate, 7-15 parts of a poly carboxylic acid water reducing agent, 16-20 parts of polyethylene wax, 0.1-0.2 part of dibenzoyl peroxide, 5-6 parts of maleic anhydride, 2-3 parts of methoxy polyethylene glycol, 4-7 parts of ethyecellulose, 0.7-2 parts of sp-80, 50-70 parts of waste rubber powder and 0.1-0.2 part of triethylamine. According to the concrete pipe pile disclosed by the invention, by doping the ethoxylated rubber fiber, the inner pore structure of the concrete can be effectively improved to form a lot of closed pores to prevent pores from forming a continuous penetrating netty structure system so as to play a role of further enhancing inhibition of invasion of carbon dioxide. In addition, the content of harmful pores and defects in the concrete structure can be further reduced, the alkalinity of hydration products is reduced, and the low-strength hydration products are promoted to be converted into high-strength hydration products.

Description

A kind of concrete tubular pile and preparation method thereof

Technical field

The present invention relates to a kind of concrete tubular pile, particularly relate to a kind of concrete tubular pile 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 concrete tubular pile, is characterized in that what it was made up of the raw material of following weight parts:

Ordinary Portland cement 500-640, yellow ground 300-400, rubble 200-300, aluminum phosphate 14-20, polycarboxylate water-reducer 7-15, polyethylene wax 16-20, dibenzoyl peroxide 0.1-0.2, maleic anhydride 5-6, poly glycol monomethyl ether 2-3, ethyl cellulose 4-7, sp-80 0.7-2, waste rubber powder 50-70, triethylamine 0.1-0.2.

A preparation method for concrete tubular pile, comprises the following steps:

(1) above-mentioned 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, joins in cooling material weight 2-3 acetone doubly, fully stirs, filter, drying, mixes with poly glycol monomethyl ether, adds compound weight 1.8-2 No. 3 white oils doubly, insulated and stirred 3-4 hour at 80-90 DEG C, suction filtration, dry, obtain oxyethyl group polyethylene wax;

(2) above-mentioned ethyl cellulose joined in 4-5 lysate doubly, described lysate is weight ratio is the toluene of 3-5:1, the mixed solution of ethanol, stirs, obtains ethyl cellulose solution;

(3) cross 60-100 mesh sieve after being dried by waste rubber powder, add the n-methyl-2-pyrrolidone of its weight 10-15%, stir, obtain rubber liquid;

(4) oxyethyl group polyethylene wax is joined in 10-12 times of deionized water, add sp-80, stir, add ethyl cellulose solution, 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 fibre;

(5) 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;

(6) ethoxylation rubber fibre is mixed with each raw material of residue, send in stirrer, 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 concrete tubular pile.

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.

Embodiment

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

Embodiment 1:

A kind of concrete tubular pile, is characterized in that what it was made up of the raw material of following weight parts:

Ordinary Portland cement 640, yellow ground 400, rubble 300, aluminum phosphate 20, polycarboxylate water-reducer 15, polyethylene wax 20, dibenzoyl peroxide 0.2, maleic anhydride 6, poly glycol monomethyl ether 3, ethyl cellulose 4, sp-80 0.7, waste rubber powder 70, triethylamine 0.2.

A preparation method for concrete tubular pile, comprises the following steps:

(1) above-mentioned polyethylene wax is joined in No. 3 white oils of its weight 4 times, add dibenzoyl peroxide, maleic anhydride, insulated and stirred 3 hours at 140 DEG C, discharging is cooled to normal temperature, joins in the acetone of cooling material weight 3 times, fully stirs, filter, drying, mixes with poly glycol monomethyl ether, adds No. 3 white oils of compound weight 1.8 times, insulated and stirred 3 hours at 90 DEG C, suction filtration, dry, obtain oxyethyl group polyethylene wax;

(2) above-mentioned ethyl cellulose joined in 4-5 lysate doubly, described lysate is weight ratio is the toluene of 3-5:1, the mixed solution of ethanol, stirs, obtains ethyl cellulose solution;

(3) cross 100 mesh sieves after being dried by waste rubber powder, add the n-methyl-2-pyrrolidone of its weight 15%, stir, obtain rubber liquid;

(4) oxyethyl group polyethylene wax is joined in 12 times of deionized waters, add sp-80, stir, add ethyl cellulose solution, rubber liquid, insulated and stirred 30 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 fibre;

(5) 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;

(6) ethoxylation rubber fibre is mixed with each raw material of residue, send in stirrer, 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 concrete tubular pile.

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;

Ultimate compression strength is 89.9MPa;

Chloride diffusion coefficient is 5.0 × 10 ^-11cm ²/ s, perviousness can be ignored.

Claims (2)

1. a concrete tubular pile, is characterized in that what it was made up of the raw material of following weight parts:

Ordinary Portland cement 500-640, yellow ground 300-400, rubble 200-300, aluminum phosphate 14-20, polycarboxylate water-reducer 7-15, polyethylene wax 16-20, dibenzoyl peroxide 0.1-0.2, maleic anhydride 5-6, poly glycol monomethyl ether 2-3, ethyl cellulose 4-7, sp-80 0.7-2, waste rubber powder 50-70, triethylamine 0.1-0.2.

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

(1) above-mentioned 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, joins in cooling material weight 2-3 acetone doubly, fully stirs, filter, drying, mixes with poly glycol monomethyl ether, adds compound weight 1.8-2 No. 3 white oils doubly, insulated and stirred 3-4 hour at 80-90 DEG C, suction filtration, dry, obtain oxyethyl group polyethylene wax;

(2) above-mentioned ethyl cellulose joined in 4-5 lysate doubly, described lysate is weight ratio is the toluene of 3-5:1, the mixed solution of ethanol, stirs, obtains ethyl cellulose solution;

(3) cross 60-100 mesh sieve after being dried by waste rubber powder, add the n-methyl-2-pyrrolidone of its weight 10-15%, stir, obtain rubber liquid;

(4) oxyethyl group polyethylene wax is joined in 10-12 times of deionized water, add sp-80, stir, add ethyl cellulose solution, 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 fibre;

(5) 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;

(6) ethoxylation rubber fibre is mixed with each raw material of residue, send in stirrer, 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 concrete tubular pile.