CN104058647A - Straw fiber concrete and preparation method thereof - Google Patents

Abstract

The invention discloses straw fiber concrete. The straw fiber concrete is prepared from the following raw materials in parts by weight: 2-3 parts of sodium phosphate, 3-4 parts of calcium chloride, 15-20 parts of calcium hydroxide, 3-4 parts of boric acid, 2-4 parts of toluene diisocynate, 5-7 parts of bamboo fibers, 6-8 parts of rice straw, 5-7 parts of wheat straw, 5-7 parts of corn straw, 1-2 parts of polyvinylpyrrolidone, 260-290 parts of sand, 3-4 parts of ethyl orthophosphate, 4-5 parts of dimethyl sulfoxide, a proper quantity of water, 25-28 parts of auxiliaries, 170-190 parts of cement, 540-570 parts of stone and 20-30 parts of superfine mineral powder. The plant straw fibers are adopted for the concrete, and after the plant straw fibers are treated, the rupture strength of the concrete can be enhanced, and in addition, the concrete has excellent waterproofness, anti-cracking ability and shock resistance; besides, the defects of cohesiveness, easy dissociation and increased initial shrinkage of fresh mixed concrete due to poorly graded stone and sand are also overcome.

Description

A kind of stalk fibre concrete and preparation method thereof

Technical field

The invention belongs to building material field, particularly a kind of stalk fibre concrete and preparation method thereof.

Background technology

Concrete has abundant raw material, cheap, the simple feature of production technique, thereby make its consumption increasing.It is high that while concrete also has ultimate compression strength, good endurance, the features such as strength grade wide ranges.These features make its use range very extensive, not only in various civil engineering works, use, and be exactly shipbuilding, mechanical industry, the exploitation of ocean, geothermal engineering etc., concrete is also important material.

Development along with component materials of concrete, people are to being not only confined to ultimate compression strength to concrete performance requriements, but basing oneself upon on the basis of intensity the balance and coordination of more focusing on concrete weather resistance, deformation performance, fire-and explosion-proof performance, water-impervious performance, toughness, erosion resistance, heat retaining property, health environment-friendly and reducing costs etc. overall target.The requirement of concrete property indices is than clearer and more definite, refinement and concrete in the past.Meanwhile, the lifting of Architectural Equipment level, continuing to bring out and promoting of novel construction process, makes concrete technology adapt to different designs, construction and service requirements, develops very fast.

Concrete also be unable to do without the raw-material development of the reinforcement of concrete, be unable to do without the development and change of concrete engineering application.Therefore, development performance is more excellent, function is more powerful, more adapt to novel process, the concrete of new building object just seems particularly important.

Summary of the invention

The object of the present invention is to provide a kind of stalk fibre concrete and preparation method thereof, this concrete has good water-repellancy, resistance to cleavage, shock resistance.

Technical scheme of the present invention is as follows:

A stalk fibre concrete, is characterized in that being made by the raw material of following weight part: sodium phosphate salt 2-3, calcium chloride 3-4, calcium hydroxide 15-20, boric acid 3-4, tolylene diisocyanate 2-4, bamboo fibers 5-7, straw 6-8, wheat straw 5-7, maize straw 5-7, polyvinylpyrrolidone 1-2, sand 260-290, etherophosphoric acid 3-4, dimethyl sulfoxide (DMSO) 4-5, water are appropriate, auxiliary agent 25-28, cement 170-190, stone 540-570, super finely ground slag 20-30;

Described auxiliary agent is made by the raw material of following weight part: steel fiber 5-6, methacrylic ester 2-3, isophorone diisocyanate 2-3, bisphenol A epoxide resin 4-5, magnesium oxide 3-4, ethyl propenoate 4-5, Oleum Bupleuri 0.4-0.7, trolamine 1-2, sodium hydroxide 0.6-0.9, tripoly phosphate sodium STPP 0.4-0.6, styrylphenol polyoxyethylene ether 0.5-0.8, ammonium persulphate 0.1-0.2, Potassium Persulphate 0.1-0.2, water 9-12; Preparation method is: water, tripoly phosphate sodium STPP, styrylphenol polyoxyethylene ether, steel fiber, methacrylic ester, ethyl propenoate, trolamine are mixed, be heated to 70-80 ℃, add ammonium persulphate reaction 20-30 minute, mix with other remaining components again, be heated to 80-90 ℃, stirring reaction 30-40 minute, obtains.

The concrete preparation method of described stalk fibre, is characterized in that comprising the following steps:

(1) bamboo fibers, straw, wheat straw, maize straw are cut into the section of 5-10cm, mix with sodium phosphate salt, boric acid, tolylene diisocyanate, polyvinylpyrrolidone, etherophosphoric acid, dimethyl sulfoxide (DMSO) again, stir 30-50 minute, mix with calcium chloride, water again, stir, obtain mixed serum;

(2) sand, cement, stone, super finely ground slag are mixed, the mixed serum and other remaining components that obtain with (1) step mix, stirring reaction 8-12 minute, and then cast, vibrates;

(3) in the wet environment of 5-25 ℃, carry out maintenance 6-8 days after building, obtain.

Beneficial effect of the present invention

Concrete of the present invention has been used plant straw fibers, through processing, has not only increased concrete folding strength, and this concrete also has good water-repellancy, resistance to cleavage, shock resistance simultaneously; The fresh concrete cohesiveness that stone and sand disproportionately graded cause, the shortcoming that easily segregation, early-age shrinkage increase have also been solved; By making used additives, increased concrete pressure-proof and snap-resistent intensity, increased concrete fragrance, rustless property, waterproof, seepage control performance are good, also have good water reducing ability, workability, plasticity-and can pumping effect.

Embodiment

A stalk fibre concrete, by following weight part (kilogram) raw material make: sodium phosphate salt 2.5, calcium chloride 3.5, calcium hydroxide 18, boric acid 3.5, tolylene diisocyanate 3, bamboo fibers 6, straw 7, wheat straw 6, maize straw 6, polyvinylpyrrolidone 1.5, sand 280, etherophosphoric acid 3.5, dimethyl sulfoxide (DMSO) 4.5, water are appropriate, auxiliary agent 27, cement 180, stone 560, super finely ground slag 25;

Described auxiliary agent by following weight part (kilogram) raw material make: steel fiber 5, methacrylic ester 2.5, isophorone diisocyanate 2.5, bisphenol A epoxide resin 4.5, magnesium oxide 3.5, ethyl propenoate 4.5, Oleum Bupleuri 0.6, trolamine 1.5, sodium hydroxide 0.7, tripoly phosphate sodium STPP 0.5, styrylphenol polyoxyethylene ether 0.6, ammonium persulphate 0.1, Potassium Persulphate 0.1, water 11; Preparation method is: water, tripoly phosphate sodium STPP, styrylphenol polyoxyethylene ether, steel fiber, methacrylic ester, ethyl propenoate, trolamine are mixed, be heated to 75 ℃, add ammonium persulphate reaction 25 minutes, mix with other remaining components again, be heated to 85 ℃, stirring reaction 35 minutes, obtains.

The concrete preparation method of described stalk fibre, comprises the following steps:

(1) bamboo fibers, straw, wheat straw, maize straw are cut into the section of 7cm, mix with sodium phosphate salt, boric acid, tolylene diisocyanate, polyvinylpyrrolidone, etherophosphoric acid, dimethyl sulfoxide (DMSO) again, stir 40 minutes, then mix with calcium chloride, water, stir, obtain mixed serum;

(2) sand, cement, stone, super finely ground slag are mixed, the mixed serum and other remaining components that obtain with (1) step mix, stirring reaction 10 minutes, and then cast, vibrates;

(3) in the wet environment of 12-23 ℃, carry out maintenance 7 days after building, obtain.

Experimental data:

The strength grade of concrete of this embodiment is C30, and the slump is 16cm, ultimate compression strength 39.4Pa, folding strength 16.8MPa.

Claims (2)

1. a stalk fibre concrete, is characterized in that being made by the raw material of following weight part: sodium phosphate salt 2-3, calcium chloride 3-4, calcium hydroxide 15-20, boric acid 3-4, tolylene diisocyanate 2-4, bamboo fibers 5-7, straw 6-8, wheat straw 5-7, maize straw 5-7, polyvinylpyrrolidone 1-2, sand 260-290, etherophosphoric acid 3-4, dimethyl sulfoxide (DMSO) 4-5, water are appropriate, auxiliary agent 25-28, cement 170-190, stone 540-570, super finely ground slag 20-30;

Described auxiliary agent is made by the raw material of following weight part: steel fiber 5-6, methacrylic ester 2-3, isophorone diisocyanate 2-3, bisphenol A epoxide resin 4-5, magnesium oxide 3-4, ethyl propenoate 4-5, Oleum Bupleuri 0.4-0.7, trolamine 1-2, sodium hydroxide 0.6-0.9, tripoly phosphate sodium STPP 0.4-0.6, styrylphenol polyoxyethylene ether 0.5-0.8, ammonium persulphate 0.1-0.2, Potassium Persulphate 0.1-0.2, water 9-12; Preparation method is: water, tripoly phosphate sodium STPP, styrylphenol polyoxyethylene ether, steel fiber, methacrylic ester, ethyl propenoate, trolamine are mixed, be heated to 70-80 ℃, add ammonium persulphate reaction 20-30 minute, mix with other remaining components again, be heated to 80-90 ℃, stirring reaction 30-40 minute, obtains.

2. the concrete preparation method of stalk fibre according to claim 1, is characterized in that comprising the following steps:

(1) bamboo fibers, straw, wheat straw, maize straw are cut into the section of 5-10cm, mix with sodium phosphate salt, boric acid, tolylene diisocyanate, polyvinylpyrrolidone, etherophosphoric acid, dimethyl sulfoxide (DMSO) again, stir 30-50 minute, mix with calcium chloride, water again, stir, obtain mixed serum;

(2) sand, cement, stone, super finely ground slag are mixed, the mixed serum and other remaining components that obtain with (1) step mix, stirring reaction 8-12 minute, and then cast, vibrates;

(3) in the wet environment of 5-25 ℃, carry out maintenance 6-8 days after building, obtain.