CN103601425A

CN103601425A - Additive for concrete with strength grade more than 20C

Info

Publication number: CN103601425A
Application number: CN201310555396.1A
Authority: CN
Inventors: 周兆弟
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-11-11
Filing date: 2013-11-11
Publication date: 2014-02-26

Abstract

The invention relates to an additive for concrete with strength grade more than 20C. The additive not only can fully utilize aggregate and dust, but also can further improve the strength grade of the concrete on the premise of reducing the usage amount of the cement. 3-20% of aggregate and dust additive is added into 100 parts by weight of cement products. The additive has the advantages of firstly setting a precedent on adopting dust as a concrete additive; secondly, fundamentally overcoming the problems that the centrifugal formation or vibrating formation of concrete structures causes the reduction of the binding property between the cement slurry and aggregate surfaces, and surface defects of the concrete structures due to throwing or ascending, and ensuring the non-reduction of cement constitution in the concrete structures, and high formation strength grade; thirdly, not only realizing the utilization of wastes, but also protecting the environment and avoiding the occurrence of earth caking phenomenon caused by aggregate dust by adopting aggregate and dust as the additive of the concrete.

Description

For the concrete additive of strength grade more than 20C

Technical field

The present invention relates to a kind ofly can make full use of sandstone dust, can reduce under the prerequisite of cement consumption again, be used for filling the hole that is not less than 0.15mm part in existing concrete yellow ground containing particle, improve concrete workability, further improve strength grade of concrete a kind of for strength grade the concrete additive more than 20C, belong to concrete additive and manufacture field.Because making, to become the stone of stone intensity must be very high, the intensity of sand is also that the very high particle diameter intensity below 0.15mm is also like this so, and can make full use of fine sand, stone flour dirt, fill all spaces that differ in size, greatly improve concrete density, greatly improved concrete strength simultaneously.

Background technology

1, CN1370756A, title " cement concrete of superstrength ", it is characterized in that: it is to using zeolite as Bo Suolan material, to replace the cement of 0.5-40%, it carries out Bo Suolan with cement and reacts, produce the calcium silicon hydrate of low density colloid, to fill up the hole of cement concrete, and the various materials in bridge joint concrete, to improve the intensity of cement concrete, become ultrahigh-strength cement concrete.Its weak point: although zeolite powder contains a certain amount of active silica and disilicon trioxide, can generate gum material with the hydrated product calcium hydroxide effect of cement, but do not solve the degree of compactness of cement in concrete formation process, cannot reach high-density high-strength concrete truly.

2, in building trade, fine sand due to natural sand and efflorescence stone or full efflorescence, because the full efflorescence layer of being originally of this sand or strong efflorescence stone are collided ditch, streams by flood from mountain, huge port, river, because of the raw material of natural sand cannot guarantee be same intensity with stone matter, so cause the high end of sand intensity of the same particle diameter of natural sand to differ completely, so particle diameter is less than the intensity foundation of 0.15 natural sand, sand is taken from riverbed, rivers and lakes lakebed, and take from riverbed, the natural sand of rivers and lakes lakebed, all contain a large amount of mud, and yellow ground below 0.15mm cannot be realized water and cleans, cannot reach for by sand, the object that mud is separated clean, therefore country is when working out yellow ground use standard, ban use of particle diameter to be less than the yellow ground below 0.15mm, and yellow ground after water cleans, although surface cleaning, but decline with the adhesion property of cement, when high speed centrifugation is made stake, pipe, bar member, or high-frequency vibration is made structures (coagulation bridge structure beam, precoated plate, Super High concrete frame) time, its high-frequency vibration causes the adhesion property between grout and sandstone to decline, rise to concrete structure condensate surface, cause structures internal water cement content to decline, set strength reduces.

Summary of the invention

Purpose of design: avoid the weak point in background technology, design a kind of particle that can make full use of at the sandstone dust below 0.15, can reduce under the prerequisite of cement consumption again, further improve strength grade of concrete a kind of for strength grade the concrete additive more than 20C.

Design: in order to realize above-mentioned purpose of design.The application adds the design of the sandstone dust of 3-20 in weight is the cement products of 100 parts, is technical characteristics of the present invention.The object of doing is like this: are Machine-made Sands due to current building trade with the employings of the sand overwhelming majority, and the exploitation that the exploitation of Machine-made Sand country expressly provides tor from top to bottom cascaded surface vertical pipe bury big gun cut into a mountain for quarrying (seeing accompanying drawing 1), do not permit transverse tube to bury big gun exploitation, its objective is in order to guarantee exploitation of stone security, prevent the generation of serious accident.Simultaneously this vertical pipe of cascaded surface is from top to bottom buried the method that big gun cuts into a mountain for quarrying and has but been brought up the phenomenon that tor soil property is all rooted out before cutting into a mountain for quarrying, and has solved the tradition middle earth of cutting into a mountain for quarrying and has mixed the phenomenon in building stones, and resulting building stones are containing earth.Because building stones are not containing earth, although therefore the dust particle in made Machine-made Sand is less than 0.15 millimeter, but not containing earth, for pure stone matter particle, not only without water, clean, and because particle is less than that 0.15 millimeter of sandstone dust has good adhesivity and by adhesivity, it can form good adhesion granule simultaneously with cement dust, because cement fineness is thinner, its activity is higher, therefore when the concrete that adds sandstone dust during at formation prefabricated component not only degree of compactness greatly improve, and strength grade is improved significantly.

Technical scheme: a kind of for strength grade the concrete additive more than 20C, weight is in the cement products of 100 parts, to add the sand powder dust additive of 3-40%.

The present invention compares with background technology, and the one, started and adopted dust as the precedent of concrete additive; The 2nd, fundamentally solved cement slurry and the sandstone surface adhesion performance that concrete structures causes when flospinning or vibration shaping and reduced, thrown to cause or rise and cause the defect on concrete structures surface, guaranteed that in concrete structures, cement composition does not reduce, fabrication strength grade is high; The 3rd, adopt sandstone dust as concrete additive, not only realize waste material utilization, and protected environment, avoided the generation of the hardening soil phenomenon that sandstone dust causes.

Embodiment

Embodiment 1: a kind of for strength grade the concrete additive more than 20C, weight is in the cement products of 100 parts, to add the sand powder dust additive of 3-20%.The particle of described sandstone dust is less than 0.15mm.

Embodiment 2: on the basis of embodiment 1, weight is to add 3% sand powder dust additive in the cement products of 100 parts.

Embodiment 3: on the basis of embodiment 1, weight is to add 20% sand powder dust additive in the cement products of 100 parts.

Embodiment 4: on the basis of embodiment 1, weight is to add 4% sand powder dust additive in the cement products of 100 parts.

Embodiment 5: on the basis of embodiment 1, weight is to add 5% sand powder dust additive in the cement products of 100 parts.

Embodiment 6: on the basis of embodiment 1, weight is to add 6% sand powder dust additive in the cement products of 100 parts.

Embodiment 7: on the basis of embodiment 1, weight is to add 7% sand powder dust additive in the cement products of 100 parts.

Embodiment 8: on the basis of embodiment 1, weight is to add 8% sand powder dust additive in the cement products of 100 parts.

Embodiment 9: on the basis of embodiment 1, weight is to add 9% sand powder dust additive in the cement products of 100 parts.

Embodiment 10: on the basis of embodiment 1, weight is to add 10% sand powder dust additive in the cement products of 100 parts.

Embodiment 11: on the basis of embodiment 1, weight is to add 11% sand powder dust additive in the cement products of 100 parts.

Embodiment 12: on the basis of embodiment 1, weight is to add 12% sand powder dust additive in the cement products of 100 parts.

Embodiment 13: on the basis of embodiment 1, weight is to add 13% sand powder dust additive in the cement products of 100 parts.

Embodiment 14: on the basis of embodiment 1, weight is to add 14% sand powder dust additive in the cement products of 100 parts.

Embodiment 15: on the basis of embodiment 1, weight is to add 15% sand powder dust additive in the cement products of 100 parts.

Embodiment 16: on the basis of embodiment 1, weight is to add 16% sand powder dust additive in the cement products of 100 parts.

Embodiment 17: on the basis of embodiment 1, weight is to add 17% sand powder dust additive in the cement products of 100 parts.

Embodiment 18: on the basis of embodiment 1, weight is to add 18% sand powder dust additive in the cement products of 100 parts.

Embodiment 19: on the basis of embodiment 1, weight is to add 19% sand powder dust additive in the cement products of 100 parts.

Embodiment 20: on the basis of embodiment 1, weight is to add 25% sand powder dust additive in the cement products of 100 parts.

Embodiment 21: on the basis of embodiment 1, weight is to add 30% sand powder dust additive in the cement products of 100 parts.

Embodiment 22: on the basis of embodiment 1, weight is to add 35% sand powder dust additive in the cement products of 100 parts.

Embodiment 23: on the basis of embodiment 1, weight is to add 38% sand powder dust additive in the cement products of 100 parts.

Embodiment 24: on the basis of embodiment 1, weight is to add 40% sand powder dust additive in the cement products of 100 parts.

Embodiment 25: on the basis of above-described embodiment: (1) a kind of when for strength grade, the concrete additive more than 20C is used for making concrete pile, due to concrete tubular pile, be configured as high speed centrifugation moulding method, concrete in pile tube shaping mould under ultracentrifugal effect, in its concrete, cement composition is thrown tube wall under ultracentrifugal effect, make the huge increasing of cement component content of tube wall wall, the cement composition of tube wall own reduces, degree of compactness reduces, lead concrete tubular pile intensity and cannot reach high-density so far, high strength, and (the fragmentation of sandstone mechanical process, screening, transport etc.) and the fine dust particle of generation, the particle size range of its dust by carefully to 1/10 μ m to hundreds of micron, this fine solid particles can not only disperse (suspension) in gas, and there is good adhesivity, therefore when there is mutual adhesion with cement particulate in it, both made under ultracentrifugal effect, also cannot be by cement particulate and sandstone dust separation, thereby work as and sandstone, when cement mixing forms concrete, not only there is good filling function, improve concrete degree of compactness, and can fundamentally solve that concrete tubular pile is centrifugal to be manufactured caused cement slurry and reduced by the tube wall degree of compactness of throwing tube wall wall and causing, the defect that intensity is low.(2) a kind of when for strength grade, the concrete additive more than 20C is used for making concrete structures, because being shaped, concrete structures adopt high-frequency vibration that concrete degree of compactness is increased, and cement composition declines with the adhesion property of sandstone under the effect of high-frequency vibration in concrete, cause the huge increasing of cement component content on structures surface, inner cement composition reduces, strength grade of concrete reduces, cannot reach high-density, high-intensity object, the application is by (the fragmentation of sandstone mechanical process, screening, transport etc.) and the fine dust particle of generation, the particle size range of this dust by carefully to 1/10 μ m to hundreds of micron, thereby this fine solid particles can not only disperse (suspension) in gas, and there is good adhesivity, when itself and cement particulate occur mutually to adhere to, both made under the effect of high-frequency vibration,

Also cannot be by cement particulate and sandstone dust separation, thereby when forming concrete with sandstone, cement mixing, not only there is good filling function, improve concrete strength grade, and can fundamentally solve concrete and construct part and manufacture the defect that caused cement slurry and sandstone adhesion property decline, guaranteed the raising of concrete structures strength grade.

It is to be understood that: although above-described embodiment is to the mentality of designing of the present invention detailed text description of contrasting; but these text descriptions; just the simple text of mentality of designing of the present invention is described; rather than the restriction to mentality of designing of the present invention; any combination, increase or modification that does not exceed mentality of designing of the present invention, all falls within the scope of protection of the present invention.

Claims

1. the concrete additive more than 20C for strength grade, is characterized in that: in the cement products that weight is 100 parts, add the sand powder dust additive that fineness is less than 0.15mm, weight 3-40%.

2. according to claim 1 adding forced agent, it is characterized in that: the sandstone dust that described particle is less than 0.15mm is for the hole in fill concrete yellow ground, improves concrete workability, has greatly improved concrete compression and tensile strength.