CN109824330A - A kind of high-performance middle-and-low strength concrete - Google Patents

A kind of high-performance middle-and-low strength concrete Download PDF

Info

Publication number
CN109824330A
CN109824330A CN201910250388.3A CN201910250388A CN109824330A CN 109824330 A CN109824330 A CN 109824330A CN 201910250388 A CN201910250388 A CN 201910250388A CN 109824330 A CN109824330 A CN 109824330A
Authority
CN
China
Prior art keywords
parts
concrete
water
performance
agent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910250388.3A
Other languages
Chinese (zh)
Inventor
王荣生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Aerospace Building Materials Technology Co Ltd
Original Assignee
Jiangsu Aerospace Building Materials Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Aerospace Building Materials Technology Co Ltd filed Critical Jiangsu Aerospace Building Materials Technology Co Ltd
Priority to CN201910250388.3A priority Critical patent/CN109824330A/en
Publication of CN109824330A publication Critical patent/CN109824330A/en
Pending legal-status Critical Current

Links

Abstract

The invention discloses a kind of high-performance middle-and-low strength concretes, the concrete includes following components according to the mass fraction: cement: 60-80 parts, regeneration concrete micro mist: 50-70 parts, coarse aggregate: 15-20 parts, fine aggregate: 10-15 parts, flyash: 20-25 parts, water: 40-50 parts, bentonite: 2-4 parts, water-reducing agent: 10-15 parts, triterpenoid saponin: 3-5 parts, acidification flake asbestos: 1-2 parts, aluminium chloride: 1-2 parts, mineral admixture: 10-15 parts, glass bead: 2-4 parts, graphene powder: 1-3 parts, nano boron carbide-silicon carbide whisker powder: 3-5 parts, thickener: 0.5-1 parts, organic fibrous material: 5-7 parts, antibacterial agent: 1-3 parts;The Cost of Concrete is cheap, and structure is more closely knit, improves high epistasis, stability and the durability of construction, and the service life is then much higher than traditional product.

Description

A kind of high-performance middle-and-low strength concrete
Technical field
The present invention relates to a kind of concrete, and in particular to a kind of high-performance middle-and-low strength concrete.
Background technique
China is in new historical periods at present, faces comprehensive reform, conventional concrete building enterprise inside and outside Deep variation also occurs for environment, and under new industry development situation and the new normality background of economic development, conventional concrete is built Industry beyond reasonable doubt current significant challenge and opportunity are built, is relied on scientific and technological advances, model innovation is constantly grown stronger and larger It is excellent, new requirement is just adapted to, could stand firm, establish oneself in an unassailable position in fierce market.As concrete is wanted in market The continuous improvement asked, environmentally protective low-carbon energy-saving technology are weeded out the old and bring forth the new, and Concrete Industry is equally faced with asking for transition and upgrade Topic.
Middle-and-low strength concrete high performance is researched and developed, high epistasis, stability and the durability of construction are mainly improved, Since the 1970s, many industrially developed country are faced with some reinforced concrete structures, especially build in one's early years The infrastructure problem of aging such as bridge, need to put into huge fund and repair or update.The portion of American National material consulting office Government Report is pointed out: in the U.S.'s 57.5 ten thousand bridge blocks at that time, about 25.3 ten thousand are in different degrees of collapse state, Some validity periods were less than 20 years, and impaired bridge also increases by 3.5 ten thousand every year.In the report " country for submitting US Congress It is pointed out in highway and bridge status ", 91,000,000,000 dollars need to be invested to repair or replacing the expense of existing defective bridge;As delayed Reparation process, expense will increase to 131,000,000,000 dollars.About 6 trillion dollars of value of the existing whole concrete works in the U.S., every year Expense for maintenance is up to 30,000,000,000 dollars.In Canada, to be consumed to repair whole infrastructure projects estimation of deterioration damage Take 500,000,000,000 dollars.Durability of Concrete is also very serious in China's Structural Engineering.The Ministry of Construction has organized to domestic coagulation The investigation of soil structure finds that most of industrial buildings and outdoor structures need overhaul after using 25-30, is situated between in harmful Building service life in matter only 15-20 years, the bridge durability for building construction, under open-air atmosphere It is even more serious with disease conditions.According to national Highway General Survey in 2000, has various highway bridge 27889 to 2000 end of the year China Seat, Dangerous highway bridge 9597, annual 3800000000 yuan of maintenance cost of actual needs, and practical only 800,000,000 yuan in place.Harbour, harbour, gate Etc. engineerings because be in marine environment, Chloride Attack cause steel bar corrosion, cause component cracking, corrosion condition it is the most serious.It hands over The units such as logical the 4th navigational matters Engineering Bureau, portion to the harbour investigation of South China 18 as a result, have 80% or more occur it is serious or compared with Serious steel bar corrosion destroys, and the time some destroyed occurs away from building up only 5-10 years.In addition concrete is maximum as dosage Artificial material must consider its influence of the use to ecological environment.Although with other Building woods such as steel, aluminium, plastics Material is compared, and concrete itself is also a kind of purity material, but since its dosage is huge, exhaustive exploitation ore and sand, stone aggregate The destruction Of resources are caused in many places and seriously affect environment and natural landscape.Some big cities have been difficult to obtain quality conjunction The sandstone of lattice.On the other hand, due to concrete premature deterioration, concrete rubbish after engineering is removed former days how disposing expense also to Environment brings threat.Therefore, following concrete must fundamentally reduce cement consumption, it is necessary to more utilize various industry Waste residue is as its raw material;Must fully consider the regeneration of discarded concrete, following concrete must be it is high performance, It is especially durable." high performance concrete " is exactly to generate in this background.Many concrete under conventional environment at present Structure is often being destroyed because of durability deficiency after having used the not too long of time, and the endurance issues of concrete have caused The extensive concern of people.Large-scale, super-huge hydraulic and hydroelectric engineerings many at this stage, subway and tunnel, highway and bridge etc. are great Engineering mostly uses low strong and moderate strength concrete in the design, but Life Design then requires to meet or exceed 100 years, such as long The concrete strength that river Three Gorges Dam pours is mostly in C25-C30, but service life but requires to grow very much, for another example Line of Nanjing Subway work Journey, the concrete strength widely applied is also C25-C30, but its projected life also requires to be greater than 100 years, but due to passing The concrete theory of system thinks that concrete crushing strength improves, and endurance quality can also be correspondinglyd increase, and is affected by this, usually The high meter strength grade of continuous improvement concrete is taken to improve the endurance quality of concrete.For a long time, people always High-strength energy concrete is mentioned in the same breath with high performance concrete, it is believed that after the design strength of concrete improves, every endurance quality is all It can accordingly be improved, so, not only increase construction cost, also add the integral load of building therefore, Make every effort to break through industry bottleneck on the high performance direction of middle-and-low strength concrete, leads the transition and upgrade of industry normal concrete.
Summary of the invention
The technical problem to be solved by the present invention is to propose a kind of high-performance for the above disadvantage of the existing technology Middle-and-low strength concrete, the Cost of Concrete is cheap, and structure is more closely knit, improves the high epistasis of construction, stability and resistance to Long property, service life are then much higher than traditional product.
The technical solution that the present invention solves the above technical problem is:
A kind of high-performance middle-and-low strength concrete, which includes following components according to the mass fraction:
Cement: 60-80 parts, regeneration concrete micro mist: 50-70 parts, coarse aggregate: 15-20 parts, fine aggregate: 10-15 parts, flyash: 20-25 parts, water: 40-50 parts, bentonite: 2-4 parts, water-reducing agent: 10-15 parts, triterpenoid saponin: 3-5 parts, it is acidified flake asbestos: 1-2 Part, aluminium chloride: 1-2 parts, mineral admixture: 10-15 parts, glass bead: 2-4 parts, graphene powder: 1-3 parts, nano silicon carbide Boron-carbon SiClx whisker powder: 3-5 parts, thickener: 0.5-1 parts, organic fibrous material: 5-7 parts, antibacterial agent: 1-3 parts;
Cement includes the mixture of 32.5 class g cement of slag and 52.5 grade portland cements;The raw material of coarse aggregate be limestone or Granite;Fine aggregate be in, thick river sand or artificial sand, fineness modulus 2.5-2.7;Mineral admixture is silica and oxidation The mixture of calcium, in mass ratio meter silica: calcium oxide=2:1;Thickener is hydroxypropyl methyl cellulose ether and ethoxy first The mixing of one or more of base cellulose ether;Organic fibrous material be plant fiber, animal origin, manmade carbon fibre, The mixing of one or more materials such as carbon nanotube;Antibacterial agent be one of cerous nitrate, lanthanum nitrate and silver ion antimicrobial agent or Person is a variety of.
The technical solution that the present invention further limits are as follows:
In aforementioned high-performance middle-and-low strength concrete, which includes following components according to the mass fraction:
Cement: 60 parts, regeneration concrete micro mist: 50 parts, coarse aggregate: 15 parts, fine aggregate: 10 parts, flyash: 20 parts, water: 40- 50 parts, bentonite: 2 parts, water-reducing agent: 10 parts, triterpenoid saponin: 3 parts, be acidified flake asbestos: 1 part, aluminium chloride: 1 part, mineral are admixed Material: 10 parts, glass bead: 2 parts, graphene powder: 1 part, nano boron carbide-silicon carbide whisker powder: 3 parts, thickener: 0.5 Part, organic fibrous material: 5 parts, antibacterial agent: 1 part.
In aforementioned high-performance middle-and-low strength concrete, which includes following components according to the mass fraction:
Cement: 80 parts, regeneration concrete micro mist: 70 parts, coarse aggregate: 20 parts, fine aggregate: 15 parts, flyash: 25 parts, water: 50 Part, bentonite: 4 parts, water-reducing agent: 15 parts, triterpenoid saponin: 5 parts, acidification flake asbestos: 2 parts, aluminium chloride: 2 parts, mineral admixture: 15 parts, glass bead: 2-4 parts, graphene powder: 3 parts, nano boron carbide-silicon carbide whisker powder: 5 parts, thickener: 1 part, Organic fibrous material: 7 parts, antibacterial agent: 3 parts.
In aforementioned high-performance middle-and-low strength concrete, which includes following components according to the mass fraction:
Cement: 70 parts, regeneration concrete micro mist: 60 parts, coarse aggregate: 18 parts, fine aggregate: 13 parts, flyash: 22 parts, water: 45 Part, bentonite: 3 parts, water-reducing agent: 12 parts, triterpenoid saponin: 4 parts, be acidified flake asbestos: 1.5 parts, aluminium chloride: 1.5 parts, mineral are admixed Material: 12 parts, glass bead: 3 parts, graphene powder: 2 parts, nano boron carbide-silicon carbide whisker powder: 4 parts, thickener: 0.8 Part, organic fibrous material: 6 parts, antibacterial agent: 2 parts.
In aforementioned high-performance middle-and-low strength concrete, coarse aggregate moisture content 0.09-0.2%;Fine aggregate water content 0.2- 0.5%。
In aforementioned high-performance middle-and-low strength concrete, water-reducing agent includes following components according to the mass fraction:
Polycarboxylate buck agent: 20-25 parts, ligno-sulfate based plasticizer: 10-15 parts, corrosion inhibitor: 1-3 parts, retarder: 2-4 Part, defoaming agent: 0.5-1 parts, water: 40-50 parts;
The preparation method of polycarboxylate buck agent is specific as follows: first by poly glycol monomethyl ether, the pure and mild water of polyether polyols, heating is anti- It answers, the mixed solution of unsaturated acids, catalyst and unsaturated monomer is added dropwise, 2-4h is added dropwise, keep the temperature 1-3h, be cooled to 50-55 DEG C, pH6-8 is adjusted, polycarboxylate buck agent is obtained.
In aforementioned high-performance middle-and-low strength concrete, corrosion inhibitor is sodium nitrite;Retarder is Lignosite;Defoaming agent For organic silicon defoamer.
In aforementioned high-performance middle-and-low strength concrete, be acidified flake asbestos the preparation method comprises the following steps: in temperature be 30-35 by asbestos DEG C mass concentration be 1-3% hydrochloric acid solution in stir process 30-40min, water content 7-8% is dried to after taking-up, is ground into Powder crosses 200 meshes to obtain the final product.
In aforementioned high-performance middle-and-low strength concrete, the preparation process of concrete is specific as follows:
(1) cement, regeneration concrete micro mist, coarse aggregate, fine aggregate, flyash and water are poured into blender, open blender, 5-10min is stirred, the raw material of blender opposite is made to be stirred mixing;
(2) then into blender be added bentonite, water-reducing agent, triterpenoid saponin, acidification flake asbestos, aluminium chloride, mineral admixture, Glass bead, graphene powder, nano boron carbide-silicon carbide whisker powder, thickener and antibacterial agent continue to stir 20- 30min;
(3) organic fibrous material is added into step (2) to stir while being added, continues to stir 10-15min, then charges In bucket;
(4) charging ladle of step (3) is placed on a vibration table, then opens shake table, close vibration after shaking 20-30min Platform cools down the concrete in charging ladle with freezing machine, cooling 10-15min.
The beneficial effects of the present invention are:
Raw material sources needed for the present invention are extensive, predominantly traditional cements, sandstone, flyash, additive and water, it is from a wealth of sources at This is cheap;High performance middle-and-low strength concrete of the invention, is significantly better than traditional middle-and-low strength concrete, comparable in cost In the case of, the stability of construction greatly improves, and the service life is then much higher than traditional product.
Performance: mix-design should be on the basis of drying regime aggregate, and less than 0.5%, coarse aggregate contains fine aggregate water content Water rate is less than 0.2%;Compression strength reaches 100%;The test method of concrete mixture characteristic, mechanical property and endurance quality accords with Close existing national standards " Standard for test methods of properties of ordinary concrete mixture standard " GB/T50080, " normal concrete mechanical property Test method standard " GB/T50081 and " Standard for test methods of longterm performance and durability of ordinary concrete standard " GB/T50082 Regulation has good mix physical performance, mechanical property and endurance quality.,
In the comparable situation of cost, the stability of construction is greatly improved, and the service life is then much higher than traditional product.The present invention produces Product production has high degree of automation, and production capacity is big, and weighing accuracy is high, and small investment, mixing quality is good, is able to achieve more storehouses number, Polygamy composition and division in a proportion, continuous production, is not only greatly saved resource incessantly, but also realizes cost effective, has significant competing Strive advantage.
The application of product of the present invention can be huge to construction industry bring economic and social benefits, increases substantially the durable of building Property, by the technology upgrading Transformation Development of this project, there is apparent drive and castering action, the product skill to upstream and downstream firms Horizontal high, the cost performance height of art, meets country and promotes Green energy-saving buildings requirement.
Basic performance research of the present invention to raw material carries out comprehensive research and development to the formula of concrete, and the present invention keeps closing Suitable water-cement ratio, sand coarse aggregate ratio, are maintained at the slump within the scope of (200 ± 20) mm by Mixed With Admixture, change cementitious material Total dosage improves concrete workability;
Use regeneration concrete micro mist for cement components, the Self-curing effect that regenerative micro powder has, with composite water-reducing agent Decrement effect, is remarkably improved concrete early strong cracking resistance;Therefore, concrete has high volume stability.
The present invention uses triterpenoid saponin, and the spread ratio that triterpenoid saponin is introduced into the bubble in concrete is 0.2-0.3mm, mixes Relative dynamic elastic modulus retention rate of the solidifying soil after being subjected to 200 Frozen-thawed cycleds is greater than 90%, and therefore, concrete has high durable Property.
The raw material of coarse aggregate of the present invention is limestone or granite, and coarse aggregate is most important a kind of material in concrete, The application selects limestone and granite to ensure quality, can play the effect and performance of concrete itself in this way;
The mixing of Minerals admixture of the present invention, graphene powder and glass bead is added, improve concrete mobility and Cohesiveness;The addition of nano boron carbide-silicon carbide whisker powder improves the density and rigid of concrete, effectively realizes The performance characteristics of concrete.Increase antibacterial agent and improve antibacterial effect, so that environment protecting is good.
Joined fiber in the present invention, these fibers are distributed in entire concrete so that concrete assisted plus By force, to prevent contraction fissure, coagulation and the width and length that are likely to occur crack in the case where there is state of strength can also be minimized Degree, improves the tensile strength of concrete.
Many additives are such as acidified between asbestos with the use of water-reducing property is realized in the present invention, prevent the stream of concrete Dynamic property reduces at any time, be conducive to concrete fill in construct, effectively reduce the usage amount of cement, overcome general concrete Water-reducing property difference and the insufficient defect of intensity make concrete construct the raising of part intensity, and then satisfy the use demand.
The present invention is on the basis of conventional material and production equipment, production technology, the gradation design that optimised coagulation soil gathers materials, Minimum voidage is obtained, the amount of cement slurry in concrete is reduced;The water consumption of concrete is reduced using high efficiency water reducing agent;It adds big The active mineral additives of volume, active mineral additives play filling effect in concrete, reduce the dosage of cement, active mineral Spike reduces water-cement ratio, reduces the quantity of pore, improve the quality of cement slurry, change due to having played its complex effect It has been apt to the pore structure of Behavior of Hardened Cement Paste in concrete, has improved the microstructure of Behavior of Hardened Cement Paste and the uniformity of concrete, density, make Concrete structure is more closely knit, and intensity is improved significantly with durability.
Specific embodiment
Embodiment 1
The present embodiment provides a kind of high-performance middle-and-low strength concretes, which includes following components according to the mass fraction:
Cement: 60 parts, regeneration concrete micro mist: 50 parts, coarse aggregate: 15 parts, fine aggregate: 10 parts, flyash: 20 parts, water: 40- 50 parts, bentonite: 2 parts, water-reducing agent: 10 parts, triterpenoid saponin: 3 parts, be acidified flake asbestos: 1 part, aluminium chloride: 1 part, mineral are admixed Material: 10 parts, glass bead: 2 parts, graphene powder: 1 part, nano boron carbide-silicon carbide whisker powder: 3 parts, thickener: 0.5 Part, organic fibrous material: 5 parts, antibacterial agent: 1 part;
Cement includes the mixture of 32.5 class g cement of slag and 52.5 grade portland cements;The raw material of coarse aggregate is limestone; Fine aggregate is middle river sand, fineness modulus 2.5;Mineral admixture is the mixture of silica and calcium oxide, is counted in mass ratio Silica: calcium oxide=2:1;Thickener is hydroxypropyl methyl cellulose ether;Organic fibrous material is plant fiber;Antibacterial agent For cerous nitrate.
In the present embodiment: coarse aggregate moisture content 0.09%;Fine aggregate water content 0.2%.
In the present embodiment: water-reducing agent includes following components according to the mass fraction:
Polycarboxylate buck agent: 20 parts, ligno-sulfate based plasticizer: 10 parts, corrosion inhibitor: 1 part, retarder: 2 parts, defoaming agent: 0.5 part, water: 40 parts;
The preparation method of polycarboxylate buck agent is specific as follows: first by poly glycol monomethyl ether, the pure and mild water of polyether polyols, heating is anti- It answers, the mixed solution of unsaturated acids, catalyst and unsaturated monomer is added dropwise, 2h is added dropwise, keep the temperature 1h, be cooled to 50 DEG C, adjust PH6 obtains polycarboxylate buck agent.
Catalyst, unsaturated monomer, unsaturated acids etc. are specific reagent using being conventional production examination in the present embodiment Agent.
In the present embodiment, corrosion inhibitor is sodium nitrite;Retarder is Lignosite;Defoaming agent is organosilicon defoaming Agent.
In the present embodiment, be acidified flake asbestos the preparation method comprises the following steps: in the mass concentration that temperature is 30 DEG C be 1% by asbestos Hydrochloric acid solution in stir process 30min, water content 7% is dried to after taking-up, is pulverized, cross 200 meshes to obtain the final product.
The preparation process of above-mentioned concrete is specific as follows:
(1) cement, regeneration concrete micro mist, coarse aggregate, fine aggregate, flyash and water are poured into blender, open blender, 5min is stirred, the raw material of blender opposite is made to be stirred mixing;
(2) then into blender be added bentonite, water-reducing agent, triterpenoid saponin, acidification flake asbestos, aluminium chloride, mineral admixture, Glass bead, graphene powder, nano boron carbide-silicon carbide whisker powder, thickener and antibacterial agent continue to stir 20min;
(3) organic fibrous material is added into step (2) to stir while being added, continues to stir 10min, then charging ladle It is interior;
(4) charging ladle of step (3) is placed on a vibration table, then opens shake table, close bumper after shaking 20min, The concrete in charging ladle is cooled down with freezing machine, cooling 10min.
Embodiment 2
The present embodiment provides a kind of high-performance middle-and-low strength concretes, which includes following components according to the mass fraction:
Cement: 80 parts, regeneration concrete micro mist: 70 parts, coarse aggregate: 20 parts, fine aggregate: 15 parts, flyash: 25 parts, water: 50 Part, bentonite: 4 parts, water-reducing agent: 15 parts, triterpenoid saponin: 5 parts, acidification flake asbestos: 2 parts, aluminium chloride: 2 parts, mineral admixture: 15 parts, glass bead: 2-4 parts, graphene powder: 3 parts, nano boron carbide-silicon carbide whisker powder: 5 parts, thickener: 1 part, Organic fibrous material: 7 parts, antibacterial agent: 3 parts;
Cement includes the mixture of 32.5 class g cement of slag and 52.5 grade portland cements;The raw material of coarse aggregate be limestone or Granite;Fine aggregate is thick river sand, fineness modulus 22.7;Mineral admixture is the mixture of silica and calcium oxide, is pressed Mass ratio meter silica: calcium oxide=2:1;Thickener is that hydroxypropyl methyl cellulose ether and ethoxyl methyl cellulose ether are mixed It closes;Organic fibrous material is plant fiber, animal origin mixing;Antibacterial agent is cerous nitrate, lanthanum nitrate mixing.
In the present embodiment: coarse aggregate moisture content 0.2%;Fine aggregate water content 0.5%.
In the present embodiment: water-reducing agent includes following components according to the mass fraction:
Polycarboxylate buck agent: 25 parts, ligno-sulfate based plasticizer: 15 parts, corrosion inhibitor: 3 parts, retarder: 4 parts, defoaming agent: 1 part, water: 50 parts;
The preparation method of polycarboxylate buck agent is specific as follows: first by poly glycol monomethyl ether, the pure and mild water of polyether polyols, heating is anti- It answers, the mixed solution of unsaturated acids, catalyst and unsaturated monomer is added dropwise, 4h is added dropwise, keep the temperature 3h, be cooled to 55 DEG C, adjust PH8 obtains polycarboxylate buck agent.
In the present embodiment, corrosion inhibitor is sodium nitrite;Retarder is Lignosite;Defoaming agent is organosilicon defoaming Agent.
In the present embodiment, be acidified flake asbestos the preparation method comprises the following steps: in the mass concentration that temperature is 35 DEG C be 3% by asbestos Hydrochloric acid solution in stir process 40min, water content 8% is dried to after taking-up, is pulverized, cross 200 meshes to obtain the final product.
The preparation process of above-mentioned concrete is specific as follows:
(1) cement, regeneration concrete micro mist, coarse aggregate, fine aggregate, flyash and water are poured into blender, open blender, 10min is stirred, the raw material of blender opposite is made to be stirred mixing;
(2) then into blender be added bentonite, water-reducing agent, triterpenoid saponin, acidification flake asbestos, aluminium chloride, mineral admixture, Glass bead, graphene powder, nano boron carbide-silicon carbide whisker powder, thickener and antibacterial agent continue to stir 30min;
(3) organic fibrous material is added into step (2) to stir while being added, continues to stir 15min, then charging ladle It is interior;
(4) charging ladle of step (3) is placed on a vibration table, then opens shake table, close bumper after shaking 30min, The concrete in charging ladle is cooled down with freezing machine, cooling 15min.
Embodiment 3
The present embodiment provides a kind of high-performance middle-and-low strength concretes, which includes following components according to the mass fraction:
Cement: 70 parts, regeneration concrete micro mist: 60 parts, coarse aggregate: 18 parts, fine aggregate: 13 parts, flyash: 22 parts, water: 45 Part, bentonite: 3 parts, water-reducing agent: 12 parts, triterpenoid saponin: 4 parts, be acidified flake asbestos: 1.5 parts, aluminium chloride: 1.5 parts, mineral are admixed Material: 12 parts, glass bead: 3 parts, graphene powder: 2 parts, nano boron carbide-silicon carbide whisker powder: 4 parts, thickener: 0.8 Part, organic fibrous material: 6 parts, antibacterial agent: 2 parts;
Cement includes the mixture of 32.5 class g cement of slag and 52.5 grade portland cements;The raw material of coarse aggregate is granite; Fine aggregate is artificial sand, fineness modulus 2.6;Mineral admixture is the mixture of silica and calcium oxide, is counted in mass ratio Silica: calcium oxide=2:1;Thickener is ethoxyl methyl cellulose ether;Organic fibrous material is carbon nanotube;Antibacterial agent For silver ion antimicrobial agent.
In the present embodiment: coarse aggregate moisture content 0.1%;Fine aggregate water content 0.3%.
In the present embodiment: water-reducing agent includes following components according to the mass fraction:
Polycarboxylate buck agent: 22 parts, ligno-sulfate based plasticizer: 13 parts, corrosion inhibitor: 2 parts, retarder: 3 parts, defoaming agent: 0.8 part, water: 45 parts;
The preparation method of polycarboxylate buck agent is specific as follows: first by poly glycol monomethyl ether, the pure and mild water of polyether polyols, heating is anti- It answers, the mixed solution of unsaturated acids, catalyst and unsaturated monomer is added dropwise, 3h is added dropwise, keep the temperature 2h, be cooled to 52 DEG C, adjust PH7 obtains polycarboxylate buck agent.
, in the present embodiment, corrosion inhibitor is sodium nitrite;Retarder is Lignosite;Defoaming agent is organosilicon defoaming Agent.
In the present embodiment, be acidified flake asbestos the preparation method comprises the following steps: in the mass concentration that temperature is 33 DEG C be 2% by asbestos Hydrochloric acid solution in stir process 32min, water content 7% is dried to after taking-up, is pulverized, cross 200 meshes to obtain the final product.
The preparation process of above-mentioned concrete is specific as follows:
(1) cement, regeneration concrete micro mist, coarse aggregate, fine aggregate, flyash and water are poured into blender, open blender, 8min is stirred, the raw material of blender opposite is made to be stirred mixing;
(2) then into blender be added bentonite, water-reducing agent, triterpenoid saponin, acidification flake asbestos, aluminium chloride, mineral admixture, Glass bead, graphene powder, nano boron carbide-silicon carbide whisker powder, thickener and antibacterial agent continue to stir 25min;
(3) organic fibrous material is added into step (2) to stir while being added, continues to stir 13min, then charging ladle It is interior;
(4) charging ladle of step (3) is placed on a vibration table, then opens shake table, close bumper after shaking 25min, The concrete in charging ladle is cooled down with freezing machine, cooling 13min.
Water soluble chloride ion maximum level is not more than 0.3% in concrete mix in the present embodiment;Diminishing used in the present invention Agent is that a kind of composite water-reducing agent water-reducing rate is greater than 30%, and decrement reaches 25% or more, concrete initial slump reaches 220 ± 20mm, gradual loss≤10mm, so that concrete has high workability.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape At technical solution, fall within the scope of protection required by the present invention.

Claims (9)

1. a kind of high-performance middle-and-low strength concrete, which is characterized in that the concrete includes following components according to the mass fraction:
Cement: 60-80 parts, regeneration concrete micro mist: 50-70 parts, coarse aggregate: 15-20 parts, fine aggregate: 10-15 parts, flyash: 20-25 parts, water: 40-50 parts, bentonite: 2-4 parts, water-reducing agent: 10-15 parts, triterpenoid saponin: 3-5 parts, it is acidified flake asbestos: 1-2 Part, aluminium chloride: 1-2 parts, mineral admixture: 10-15 parts, glass bead: 2-4 parts, graphene powder: 1-3 parts, nano silicon carbide Boron-carbon SiClx whisker powder: 3-5 parts, thickener: 0.5-1 parts, organic fibrous material: 5-7 parts, antibacterial agent: 1-3 parts;
The cement includes the mixture of 32.5 class g cement of slag and 52.5 grade portland cements;The raw material of the coarse aggregate For limestone or granite;The fine aggregate be in, thick river sand or artificial sand, fineness modulus 2.5-2.7;The mineral blending Material is the mixture of silica and calcium oxide, in mass ratio meter silica: calcium oxide=2:1;The thickener is hydroxypropyl The mixing of one or more of ylmethyl cellulose ether and ethoxyl methyl cellulose ether;The organic fibrous material is The mixing of one or more materials such as plant fiber, animal origin, manmade carbon fibre, carbon nanotube;The antibacterial agent is nitre One or more of sour cerium, lanthanum nitrate and silver ion antimicrobial agent.
2. high-performance middle-and-low strength concrete according to claim 1, which is characterized in that the concrete is according to the mass fraction Including following components:
Cement: 60 parts, regeneration concrete micro mist: 50 parts, coarse aggregate: 15 parts, fine aggregate: 10 parts, flyash: 20 parts, water: 40- 50 parts, bentonite: 2 parts, water-reducing agent: 10 parts, triterpenoid saponin: 3 parts, be acidified flake asbestos: 1 part, aluminium chloride: 1 part, mineral are admixed Material: 10 parts, glass bead: 2 parts, graphene powder: 1 part, nano boron carbide-silicon carbide whisker powder: 3 parts, thickener: 0.5 Part, organic fibrous material: 5 parts, antibacterial agent: 1 part.
3. high-performance middle-and-low strength concrete according to claim 1, which is characterized in that the concrete is according to the mass fraction Including following components:
Cement: 80 parts, regeneration concrete micro mist: 70 parts, coarse aggregate: 20 parts, fine aggregate: 15 parts, flyash: 25 parts, water: 50 Part, bentonite: 4 parts, water-reducing agent: 15 parts, triterpenoid saponin: 5 parts, acidification flake asbestos: 2 parts, aluminium chloride: 2 parts, mineral admixture: 15 parts, glass bead: 2-4 parts, graphene powder: 3 parts, nano boron carbide-silicon carbide whisker powder: 5 parts, thickener: 1 part, Organic fibrous material: 7 parts, antibacterial agent: 3 parts.
4. high-performance middle-and-low strength concrete according to claim 1, which is characterized in that the concrete is according to the mass fraction Including following components:
Cement: 70 parts, regeneration concrete micro mist: 60 parts, coarse aggregate: 18 parts, fine aggregate: 13 parts, flyash: 22 parts, water: 45 Part, bentonite: 3 parts, water-reducing agent: 12 parts, triterpenoid saponin: 4 parts, be acidified flake asbestos: 1.5 parts, aluminium chloride: 1.5 parts, mineral are admixed Material: 12 parts, glass bead: 3 parts, graphene powder: 2 parts, nano boron carbide-silicon carbide whisker powder: 4 parts, thickener: 0.8 Part, organic fibrous material: 6 parts, antibacterial agent: 2 parts.
5. high-performance middle-and-low strength concrete described in any claim in -4 according to claim 1, it is characterised in that: described Coarse aggregate moisture content 0.09-0.2%;The fine aggregate water content 0.2-0.5%.
6. high-performance middle-and-low strength concrete described in any claim in -4 according to claim 1, it is characterised in that: described Water-reducing agent according to the mass fraction include following components:
Polycarboxylate buck agent: 20-25 parts, ligno-sulfate based plasticizer: 10-15 parts, corrosion inhibitor: 1-3 parts, retarder: 2-4 Part, defoaming agent: 0.5-1 parts, water: 40-50 parts;
The preparation method of the polycarboxylate buck agent is specific as follows: first by poly glycol monomethyl ether, the pure and mild water of polyether polyols, rising Temperature reaction, is added dropwise the mixed solution of unsaturated acids, catalyst and unsaturated monomer, and 2-4h is added dropwise, and keeps the temperature 1-3h, is cooled to 50-55 DEG C, pH6-8 is adjusted, polycarboxylate buck agent is obtained.
7. high-performance middle-and-low strength concrete according to claim 6, it is characterised in that: the corrosion inhibitor is nitrous acid Sodium;The retarder is Lignosite;The defoaming agent is organic silicon defoamer.
8. high-performance middle-and-low strength concrete described in any claim in -4 according to claim 1, it is characterised in that: described Be acidified flake asbestos the preparation method comprises the following steps: asbestos are stirred in the hydrochloric acid solution that the mass concentration that temperature is 30-35 DEG C is 1-3% It handles 30-40min, water content 7-8% is dried to after taking-up, is pulverized, cross 200 meshes to obtain the final product.
9. high-performance middle-and-low strength concrete described in any claim in -4 according to claim 1, it is characterised in that: described The preparation process of concrete is specific as follows:
(1) cement, regeneration concrete micro mist, coarse aggregate, fine aggregate, flyash and water are poured into blender, open blender, 5-10min is stirred, the raw material of blender opposite is made to be stirred mixing;
(2) then into blender be added bentonite, water-reducing agent, triterpenoid saponin, acidification flake asbestos, aluminium chloride, mineral admixture, Glass bead, graphene powder, nano boron carbide-silicon carbide whisker powder, thickener and antibacterial agent continue to stir 20- 30min;
(3) organic fibrous material is added into step (2) to stir while being added, continues to stir 10-15min, then charges In bucket;
(4) charging ladle of step (3) is placed on a vibration table, then opens shake table, close vibration after shaking 20-30min Platform cools down the concrete in charging ladle with freezing machine, cooling 10-15min.
CN201910250388.3A 2019-03-29 2019-03-29 A kind of high-performance middle-and-low strength concrete Pending CN109824330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910250388.3A CN109824330A (en) 2019-03-29 2019-03-29 A kind of high-performance middle-and-low strength concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910250388.3A CN109824330A (en) 2019-03-29 2019-03-29 A kind of high-performance middle-and-low strength concrete

Publications (1)

Publication Number Publication Date
CN109824330A true CN109824330A (en) 2019-05-31

Family

ID=66874681

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910250388.3A Pending CN109824330A (en) 2019-03-29 2019-03-29 A kind of high-performance middle-and-low strength concrete

Country Status (1)

Country Link
CN (1) CN109824330A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112624709A (en) * 2021-01-15 2021-04-09 福州大学 Antibacterial cement concrete and preparation method thereof
CN112851253A (en) * 2021-02-04 2021-05-28 深圳大学 Recycled aggregate micro-powder concrete, preparation method and drainage road edge stone

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104086126A (en) * 2014-07-04 2014-10-08 北京东方建宇混凝土科学技术研究院有限公司 Premixed concrete doped with brick recycled micro-powder
CN106673567A (en) * 2016-09-30 2017-05-17 江苏金海宁新型建材科技有限公司 High-performance concrete
CN107954657A (en) * 2017-11-27 2018-04-24 南宁兴典混凝土有限责任公司 A kind of its preparation process of green high performance concrete
CN108017332A (en) * 2017-12-28 2018-05-11 安徽金丰新型建材有限公司 A kind of strong concrete for reducing cement usage amount
CN108129085A (en) * 2017-12-28 2018-06-08 安徽金丰新型建材有限公司 A kind of method that high performance concrete is prepared using discarded concrete
CN108178584A (en) * 2018-02-05 2018-06-19 上海良延环保科技发展有限公司 A kind of regenerated environment protecting concrete
CN108239431A (en) * 2017-12-29 2018-07-03 合肥候鸟新型材料有限公司 Heat preservation putty
CN108439881A (en) * 2018-04-28 2018-08-24 芜湖盛创新材料科技有限公司 A kind of preparation method of high performance concrete

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104086126A (en) * 2014-07-04 2014-10-08 北京东方建宇混凝土科学技术研究院有限公司 Premixed concrete doped with brick recycled micro-powder
CN106673567A (en) * 2016-09-30 2017-05-17 江苏金海宁新型建材科技有限公司 High-performance concrete
CN107954657A (en) * 2017-11-27 2018-04-24 南宁兴典混凝土有限责任公司 A kind of its preparation process of green high performance concrete
CN108017332A (en) * 2017-12-28 2018-05-11 安徽金丰新型建材有限公司 A kind of strong concrete for reducing cement usage amount
CN108129085A (en) * 2017-12-28 2018-06-08 安徽金丰新型建材有限公司 A kind of method that high performance concrete is prepared using discarded concrete
CN108239431A (en) * 2017-12-29 2018-07-03 合肥候鸟新型材料有限公司 Heat preservation putty
CN108178584A (en) * 2018-02-05 2018-06-19 上海良延环保科技发展有限公司 A kind of regenerated environment protecting concrete
CN108439881A (en) * 2018-04-28 2018-08-24 芜湖盛创新材料科技有限公司 A kind of preparation method of high performance concrete

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张勇等: "中低强度等级混凝土高性能化及其工程应用", 《江苏建筑》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112624709A (en) * 2021-01-15 2021-04-09 福州大学 Antibacterial cement concrete and preparation method thereof
CN112851253A (en) * 2021-02-04 2021-05-28 深圳大学 Recycled aggregate micro-powder concrete, preparation method and drainage road edge stone

Similar Documents

Publication Publication Date Title
CN103274652B (en) Reactive powder concrete for reinforcing buildings as well as preparation method and construction method thereof
CN106242429B (en) A kind of high tenacity concrete reinforced by assorted fiber and preparation method thereof
CN101323515B (en) Ultra-high strong concrete having ultra-high pumping performance and method for preparing the same
WO2017067411A1 (en) Self-compacting concrete for use as crts iii slab ballastless railway track filler layer and method for preparation thereof
CN106747128B (en) A kind of big fluidised form High Strength Non-shrinking Filling Material and preparation method thereof
CN102718447B (en) High-performance reinforced mortar suitable for thick-layer spraying and preparation method thereof
CN102491694B (en) Self-compacting concrete and preparation method thereof
CN103482899B (en) Channel grouting agent and manufacturing method thereof
CN102745964B (en) Grouting material
CN104478325A (en) C90-grade self-compaction high-strength concrete and preparation method thereof
CN107572981A (en) A kind of concrete repair self-compacting concrete and preparation method thereof
CN104944863A (en) Preparation method for high-strength self-compacting concrete with recycled fine aggregate
CN106007573A (en) Ultra-fine high-strength plastic expansion pressure slurry and production method thereof
CN106365536A (en) Self-compacting expansive concrete
CN107935445A (en) A kind of pervious concrete reinforcing agent and preparation method thereof
CN106882942A (en) A kind of marble powder Medium and low intensity grade self-compacting concrete
CN109824330A (en) A kind of high-performance middle-and-low strength concrete
CN105174855A (en) C30 micro-expansive self-compacting concrete
CN110734257A (en) Preparation method of high impervious concrete
CN108328977B (en) Concrete repairing material
CN106316248B (en) A kind of low self-constriction high-strength concrete prepared using concrete mixing plant waste pulp
CN107265980A (en) A kind of low glue material self-compacting concrete and compound method for mixing ultra fine sand
CN106747093A (en) A kind of early strengthening and high strengthening concrete and preparation method thereof
CN106478018A (en) A kind of ecological environment-friendly type nano cement based composites
CN103387361A (en) Preparation method of three-low three-high low-carbon environmentally-friendly concrete for super high-rise buildings

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination