CN103896527A - Lightweight high-strength cement based composite material - Google Patents

Lightweight high-strength cement based composite material Download PDF

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Publication number
CN103896527A
CN103896527A CN201410100422.6A CN201410100422A CN103896527A CN 103896527 A CN103896527 A CN 103896527A CN 201410100422 A CN201410100422 A CN 201410100422A CN 103896527 A CN103896527 A CN 103896527A
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cement
aggregate
composite material
base composite
strength light
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Inventor
刘国平
施慧聪
赵正
王俊颜
姚欣
刘健
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Shanghai Royang Innovative Material Technologies Co Ltd
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Shanghai Royang Innovative Material Technologies Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention relates to a lightweight high-strength cement based composite material. The grain composition of a multivariate cementing material and grain composition of aggregate are optimized, anddue to use of additives such as water reducing agent and thickener, the material can obtain high compressive strength of over 20MPa while obtaining the unit weight which is significantly lower than that of common concrete. The material has the technical advantages that the compressive strength of 28d standard curing is greater than or equal to 20MPa when the unit weight is smaller than or equal to 1650kg/m<3>; the requirements of the construction liquidity can be met by grain composition of the optimized gel material and the grain composition of the aggregate; the hardened material has a dense surface, and has excellent endurance performances such as anti-permeability, carbonation resistance, resistance to chloride ion erosion and the like.

Description

High-strength light cement-base composite material
Technical field
The invention belongs to concrete technology field, relate to high-strength light cement-base composite material.
Background technology
Modern concrete is as the manufactured construction materials history of existing more than 170 year.In production practice process, along with the raising of state of the art, in order to solve the shortcoming that normal concrete quality is large, people have developed concrete new variety light weight concrete one by one gradually.Because light weight concrete is that a kind of specific tenacity is high, thermal insulation fire-resistant, anti-seismic performance waits well new concrete, can be widely used on the structures such as various industry and covil construction, having good Technological Economy is worth, so obtained significant progress and application in countries in the world since the sixties in last century, become one of New Building Materials of high-strength light with fastest developing speed in building material industry.In the early stage of development of light weight concrete, because its intensity is lower and people are less to its mechanical property research, the scope of its application is limited to some extent.Along with deep, the high-strength lightweight of research are the appearance of high-strength ceramic granule.People utilize high-strength ceramic granule to make density rating is 1600～1900, and strength grade, more than C20, is widely used in the high strength lightweight aggregate concrete of structure.It is significant that the appearance of this light weight concrete improves economy for reduction deadweights such as solving Longspan Bridge, extra large work structures and Highrise buildings.China starts late in the research of high-strength light cement-base composite material, promotes and is restricted owing to being subject to the poor and high in cost of production reason of the workability of material under the constraint, low water usage amount of light skeletal self intensity.
Summary of the invention
The object of this invention is to provide a kind of high-strength light cement-base composite material, grain composition by the grain composition to polynary gelling material and aggregate is optimized, and by the use of the chemical admixtures such as water reducer, make material be equal to or less than 1650kg/m obtaining 3when unit weight, reach 20MPa or higher intensity, there is suitable mobility simultaneously and guarantee material normal construction.
High-strength light cement-base composite material of the present invention, comprise gelling material, aggregate, admixture and water, it is characterized in that: described gelling material is cement and mineral admixture, described cement is that strength grade is 42.5 and above PI, PII or PO code name cement, and described mineral admixture is two or three combination of materials of silicon ash, flyash or breeze; Described aggregate comprises that apparent density is less than 1800kg/m 3aglite or apparent density be 1800～2800kg/m 3the combination of general aggregate and aglite; The combination of one or several that described admixture agent is water reducer, defoamer, thickening material, hardening accelerator, retardant or economization agent;
Wherein, cement consumption accounts for 5～40% of high-strength light cement-base composite material volume, and described mineral admixture accounts for 5～40% of high-strength light cement-base composite material volume; Described aggregate accounts for 30～80% of high-strength light cement-base composite material volume;
The particle diameter cumulative distribution curve that the proportioning mark of the each component of described gelling material is piled up curve and the each component of gelling material by ideal carries out numerical analysis;
1) the described desirable curve equation of piling up is:
P sd 100 · / m /；
Wherein, P sdfor particle is by the per-cent of sieve aperture, A is empirical constant, and d is sieve diameter, D maxfor the maximum particle diameter of particle;
The value of empirical constant A requires to determine by formula according to the design slump of high-strength light cement-base composite material or design divergence:
In the time of H≤220mm, A 5H/H,
In the time of H > 220mm, A 5L H/H,
L is divergence design load, and H is slump design load, H 0for the height 300mm of slump bucket;
2) the particle diameter cumulative distribution curve of the each component of gelling material:
To component cement required in gelling material, silicon ash, flyash and breeze after tested obtain cumulative distribution curve f separately c(d), f sf(d), f faand f (d) bs(d);
3) numerical analysis is as follows:
If it is X that cement accounts for the volume fraction of binder total amount c, the silicon ash volume fraction that accounts for binder total amount is X sf, the flyash volume fraction that accounts for binder total amount is X fathe volume fraction that accounts for binder total amount with breeze is X bs, and meet X c∈ [0.111,0.889], (X sf+ X fa+ X bs) ∈ [0.111,0.889], X c+ X sf+ X fa+ X bs=1;
Setting the particle diameter cumulative distribution curve of gelling material after mixing is:
P=X cf c(d)+X sff sf(d)+X faf fa(d)+X bsf bs(d)，
To the volume fraction X of each component c, X sf, X faand X bstaking 0.001～0.01 as step-length, exhaustive computations P in span separately, comparison curves P and P sd, calculate the standard deviation of the corresponding X-coordinate particle diameter of identical ordinate zou d, get the X of standard deviation minimum c, X sf, X faand X bsvalue is as each component proportion mark of gelling material; When actual computation, cast out associated score and the distribution curve of the corresponding gelling material not adopting;
The mass ratio W/B of the consumption of water and gelling material is 0.1～0.5, and wherein W represents the consumption of water, and B represents gelling material quality;
After mixing and stirring by the high-strength light cement-base composite material that calculates the preparation of gained proportioning, flowability properties is as follows:
Slump GB/T50080: >=10mm;
Or divergence GB/T50080: >=450mm;
The only just test in the time that high fluidity is slump > 220mm of the value of divergence, now concrete flowability is as the criterion with divergence;
After hardened material, performance is as follows:
Ultimate compression strength, normal curing 28d: >=20MPa;
Unit weight :≤1650kg/m 3.
High-strength light cement-base composite material of the present invention, comprises gelling material, fine aggregate, admixture and water, it is characterized in that: described gelling material is cement and mineral admixture, and described cement is that strength grade is 42.5 and above PI, PII or PO code name cement; The present invention is not precluded within particular cases, uses the cement of other types to be prepared high-performance cement-based anti-impact mill material according to method of the present invention; Described mineral admixture is two or three combination of materials of silicon ash, flyash or breeze;
As preferred technical scheme:
High-strength light cement-base composite material as above, described ordinate zou is chosen according to maximum value 100% decile, at least gets 5 values.
High-strength light cement-base composite material as above, described W/B is 0.12 to 0.28.
High-strength light cement-base composite material as above, described cement meets GB " general purpose portland cement " GB175; Described silicon ash meets " mortar and the reinforcement of concrete silicon ash " GB/T27690; Described flyash meets " for cement and concrete flyash " GB/T1596; Described breeze meets " for the GBFS of cement and concrete " GB/T18046; Water meets " the reinforcement of concrete water quality standard " JGJ63.
Aglite in high-strength light cement-base composite material as above is the one or more combination of glass bead, pearlstone, expanded slag, swelling clay, float stone, vermiculite, light ceramic, granular polystyrene, and described general aggregate is the one or more combination of natural sand, artificial sand; The volume ratio of described aggregate and described gelling material is 0.5～4.0.
During for two or more aggregate of use, the cumulative distribution curve that the ratio of aggregate is piled up curve and various aggregates by ideal carries out numerical analysis;
1) described accumulation curve equation is:
P sdA 100 · A/ Am /；
Wherein, P sdAfor particles of aggregates is by the per-cent of sieve aperture, B is aggregate empirical constant, d afor aggregate sieve diameter, D amaxfor the maximum particle diameter of particles of aggregates;
The value of empirical constant B requires to determine by formula according to the slump of high-strength light cement-base composite material or divergence:
In the time of H≤220mm, B 5H/H,
In the time of H > 220mm, B 5L H/H,
L is divergence design load, and H is slump design load, H 0for the height 300mm of slump bucket;
2) the particle cumulative distribution curve of various aggregates:
Various aggregate screening tests are obtained to cumulative distribution curve f separately an(d);
F an(d) be n# aggregate, n=1～10;
3) numerical analysis is as follows:
If it is X that n# aggregate accounts for the volume fraction of aggregate total amount an, and meet ∑ X an1;
Setting the particle diameter cumulative distribution curve of aggregate after mixing is:
P A ∑X Anf A d；
To the volume fraction X of each component antaking 0.001～0.05 as step-length, exhaustive computations P in span separately a, comparison curves P aand P sdA, calculate the corresponding X-coordinate particle diameter of identical ordinate zou d astandard deviation, get the X of standard deviation minimum anvalue is as each component proportion mark of aggregate.
High-strength light cement-base composite material as above, described ordinate zou is chosen according to maximum value 100% decile, at least gets 5 values.
High-strength light cement-base composite material as above, described in described high-strength light cement-base composite material, admixture is water reducer, defoamer, thickening material, hardening accelerator, one or several the combination of retardant and economization agent, water reducer is selected more than 25% water reducer of water-reducing rate, volume is 0.5%～5% of described gelling material quality, defoamer volume is 0.08%～2% of gelling material quality, thickening material volume is 0.005%～0.5% of gelling material quality, hardening accelerator volume is 0.01～5% of gelling material quality, retardant volume is cement material quality 0.005%～1.5%, economization agent volume is 0.1%～5% of gelling material quality.
Water reducer mainly comprises polycarboxylic acid concrete superplasticizer, does not also get rid of the superplasticizer that other can promote that gelling material is disperseed.Described water reducer can comprise solution form and solid form.
Defoamer mainly comprises the defoamer of the types such as polyethers, high-carbon alcohols, silicone based, polyether-modified silicon.Described defoamer can comprise solution form, solid form or preferred resin form, oily form or emulsion form.
Thickening material mainly comprises derivatived cellulose, as methylcellulose gum, Walocel MT 20.000PV, ethyl cellulose, Natvosol; Natural polymer and derivative thereof, as starch, gelatin, sodium alginate, casein food grade, guar gum, chitosan, Sudan Gum-arabic, xanthan gum; Inorganic thickening agent, as sodium bentonite, diatomite; Synthetic polymer, as polypropylene milling amine, modified paraffin resin, polyacrylic acid.Can use the mixture of above reagent.
Hardening accelerator mainly comprises: sodium salt, calcium salt and organism, and as trolamine, urea.
Retardant mainly comprises: polyol, hydroxycarboxylate and derivative thereof, high sugared sulfonated lignin.
Economization agent mainly comprises: lower alcohol alkylidene group epoxy compounds, polyalcohols and polyethers.
High-strength light cement-base composite material as above, the water-reducing rate of described water reducer is more than 30%, volume is 0.8%～3% of described gelling material quality.
High-strength light cement-base composite material as above, in described high-strength light cement-base composite material, also add fiber, described fiber is steel fiber or non-metallic fibers, non-metallic fibers is polyvinyl alcohol fiber, polyethylene fibre, polypropylene fibre, polyacrylonitrile fibre, trevira, nylon fiber, cellulosic fibre, carbon fiber, glass fibre or basalt fibre, accounts for 0.05%～5% of described high-strength light cement-base composite material volume; The diameter of described fiber is 15～1000 μ m, and staple length is 1～100mm.
Beneficial effect:
(1) at≤1650kg/m 3unit weight situation is issued to 28d mark and supports ultimate compression strength>=20MPa;
(2) reach by optimizing the grain composition of gelling material grain composition and aggregate the requirement that meets construction mobility under low water binder ratio; (3) material surface densification after sclerosis, has the excellent endurance quality such as impervious, anti-carbonization, corrosion resistance of chloride ion.。
Embodiment
Below in conjunction with embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
High-strength light cement-base composite material, comprise gelling material, light skeletal, water, fiber and water reducer, described cement is that strength grade is 42.5 PO cement, and described mineral admixture is silicon ash and flyash, and the light skeletal of use is particle diameter 0.5～2mm, apparent density 95kg/m 3glass bead.
The proportioning mark of cement, silicon ash and flyash piles up curve by ideal and its particle diameter cumulative distribution curve carries out numerical analysis;
1) the described desirable curve equation of piling up is:
P sd 100 · / m /；
Wherein, P sdfor particle is by the per-cent of sieve aperture, A is empirical constant, and d is sieve diameter, D maxfor the maximum particle diameter of particle;
The value of empirical constant A requires to determine by formula according to the design slump of high-strength light cement-base composite material or design divergence:
Slump GB/T50080:180mm; The height H of slump bucket 0for 300mm;
A 5·H/H=3.0；
In material, the maximum particle diameter of cement is greater than other bi-materials, so D maxget the maximum particle diameter 110 μ m of cement;
2) the particle diameter cumulative distribution curve of the each component of gelling material:
To cement, silicon ash and flyash after tested obtain cumulative distribution curve f separately c(d), f sfand f (d) fa(d);
3) numerical analysis is as follows:
If it is X that cement accounts for the volume fraction of binder total amount c, the silicon ash volume fraction that accounts for binder total amount is X sfthe volume fraction that accounts for binder total amount with flyash is X fa, and meet X c∈ [0.111,0.889], (X sf+ X fa) ∈ [0.111,0.889], X c+ X sf+ X fa=1;
Setting the particle diameter cumulative distribution curve of gelling material after mixing is:
P=X cf c(d)+X sff sf(d)+X faf fa(d)，
To the volume fraction X of each component c, X sfand X fataking 0.001 as step-length, exhaustive computations P in span separately, comparison curves P and P sd, on ordinate zou, get 5 Along ents in maximum value, calculate the standard deviation of the corresponding X-coordinate particle diameter of identical ordinate zou d, relatively obtain as calculated the X of standard deviation minimum c=0.407, X sf=0.202, X fa=0.391, respectively as the proportioning mark of cement, silicon ash and flyash;
The mass ratio W/B of the consumption of water and gelling material is 0.261, and wherein W represents the consumption of water, and B represents gelling material quality.
The volume ratio of aggregate and gelling material is 2.02.Cement volume accounts for 10.5% of cumulative volume, and mineral admixture accounts for 15.3%, and aggregate accounts for 52.1%.
Use polycarboxylate water-reducer, pulvis, water-reducing rate 30%, consumption is gelling material 2.9%;
Use PVA fiber, diameter 20 μ m, length 18mm, volume volume is 0.1%;
The consumption of main materials of high-strength light cement-base composite material, volume percent is as follows:
Figure BDA0000478669160000061
Each material usage of high-strength light cement-base composite material, mass ratio is as follows:
After mixing and stirring by the high-strength light cement-base composite material that calculates the preparation of gained proportioning, flowability properties is as follows:
Slump GB/T50080:180mm;
After hardened material, performance is as follows:
Ultimate compression strength, normal curing 28d:20.5MPa;
Unit weight: 943.5kg/m 3.
Embodiment 2
High-strength light cement-base composite material, comprise gelling material, aggregate, water, water reducer and thickening material, described cement is that strength grade is 52.5 PII cement, and described mineral admixture is silicon ash and breeze, the account form that the each component proportion mark of gelling material is pressed embodiment 1, obtains X c=0.503, X sf=0.244, X bs=0.254;
The aggregate using comprises:
1# aggregate: the natural river sand that fineness modulus is 2.7;
2# aggregate: particle diameter is that 0.5～2mm apparent density is 95kg/m 3glass bead;
3# aggregate: particle diameter is that 5～10mm apparent density is 500kg/m 3light shale haydite;
The cumulative distribution curve that the ratio of aggregate is piled up curve and various aggregates by ideal carries out numerical analysis;
1) described accumulation curve equation is:
P dAB 100 B · d A/D A /；
Wherein, P sdAfor particles of aggregates is by the per-cent of sieve aperture, B is aggregate empirical constant, d afor aggregate sieve diameter, D amaxget the maximum particle diameter 10mm of 3# aggregate;
The value of empirical constant B requires to determine by formula according to the slump of high-strength light cement-base composite material or divergence:
Slump GB/T50080:195mm; The height H of slump bucket 0for 300mm;
B 5·H/H=3.25；
2) the particle cumulative distribution curve of various aggregates:
Above-mentioned 3 kinds of aggregate screenings are tested the cumulative distribution curve obtaining separately and are followed successively by f s1(d), f s2and f (d) s3(d).
3) numerical analysis is as follows:
If it is X that the aggregate of 1#, 2# and 3# accounts for the volume fraction of aggregate total amount s1, X s2and X s3, and meet X s1+ X s2+ X s3=1;
Setting the particle diameter cumulative distribution curve of aggregate after mixing is:
P A=X s1f s1(d)+X s2f s2(d)+X s3f s3(d)；
To the volume fraction X of each component s1, X s2and X s3taking 0.002 as step-length, exhaustive computations P in span separately a, comparison curves P aand P sdA, on ordinate zou, get 5 Along ents in maximum value, calculate the corresponding X-coordinate particle diameter of identical ordinate zou d astandard deviation, relatively obtain as calculated the X of standard deviation minimum s1=0.066, X s2=0.275, X s3=0.658, respectively as the proportioning mark of 1#, 2# and 3# aggregate;
The volume ratio of aggregate and gelling material gets 3.06; Water-cement ratio is 0.311; Admixture uses polycarboxylate water-reducer solution, and volume is 1.6% of gelling material quality; Thickening material adopts methylcellulose gum, and volume is 0.02% of gelling material quality;
The consumption of main materials of high-strength light cement-base composite material, volume percent is as follows:
Figure BDA0000478669160000081
Each material usage of high-strength light cement-base composite material, mass ratio is as follows:
Figure BDA0000478669160000082
After mixing and stirring by the high-strength light cement-base composite material that calculates the preparation of gained proportioning, flowability properties is as follows:
Slump GB/T50080:195mm;
After hardened material, performance is as follows:
Ultimate compression strength, normal curing 28d:30.8MPa;
Unit weight: 889.6kg/m 3.
Embodiment 3
High-strength light cement-base composite material, comprise gelling material, aggregate, water, water reducer and economization agent, described cement is that strength grade is 62.5 PII cement, and described mineral admixture is silicon ash and breeze, the account form that the each component proportion mark of gelling material is pressed embodiment 1, obtains X c=0.774, X sf=0.122, X bs=0.104; It is that 5～10mm apparent density is 550kg/m that aggregate adopts natural river sand and the particle diameter that fineness modulus is 2.7 3light haydite of powdered coal ash, the proportioning mark of the each component of aggregate, according to the account form of embodiment 2, obtains X s1=0.192, X s2=0.808; The volume ratio of aggregate and gelling material gets 0.943; Water-cement ratio is 0.159; Admixture uses polycarboxylate water-reducer solution, and volume is 1.5% of gelling material quality; Thickening material adopts methylcellulose gum, and volume is 0.02% of gelling material quality;
The consumption of main materials of high-strength light cement-base composite material, volume percent is as follows:
Figure BDA0000478669160000091
Each material usage of high-strength light cement-base composite material, mass ratio is as follows:
Figure BDA0000478669160000092
After mixing and stirring by the high-strength light cement-base composite material that calculates the preparation of gained proportioning, flowability properties is as follows:
Slump GB/T50080:165mm;
After hardened material, performance is as follows:
Ultimate compression strength, normal curing 28d:58.6MPa;
Unit weight: 1629.4kg/m 3.
Embodiment 4
High-strength light cement-base composite material, comprise gelling material, aggregate, water and water reducer, described cement is that strength grade is 42.5 PII cement, and described mineral admixture is silicon ash and flyash, the account form that the each component proportion mark of gelling material is pressed embodiment 1, obtains X c=0.182, X sf=0.089, X fa=0.729; It is that 5～10mm apparent density is 550kg/m that aggregate adopts natural river sand and the particle diameter that fineness modulus is 2.7 3light haydite of powdered coal ash, the proportioning mark of the each component of aggregate, according to the account form of embodiment 2, obtains X s1=0.235, X s2=0.765; The volume ratio of aggregate and gelling material gets 0.655; Water-cement ratio is 0.167; Admixture uses polycarboxylate water-reducer solution, and volume is 1.5% of gelling material quality;
The consumption of main materials of high-strength light cement-base composite material, volume percent is as follows:
Figure BDA0000478669160000101
Each material usage of high-strength light cement-base composite material, mass ratio is as follows:
Figure BDA0000478669160000102
After mixing and stirring by the high-strength light cement-base composite material that calculates the preparation of gained proportioning, flowability properties is as follows:
Slump GB/T50080:175mm;
After hardened material, performance is as follows:
Ultimate compression strength, normal curing 28d:31.2MPa;
Unit weight: 1575.9kg/m 3.

Claims (9)

1. high-strength light cement-base composite material, comprise gelling material, aggregate, admixture and water, it is characterized in that: described gelling material is cement and mineral admixture, described cement is that strength grade is 42.5 and above PI, PII or PO code name cement, and described mineral admixture is two or three combination of materials of silicon ash, flyash or breeze; Described aggregate comprises that apparent density is less than 1800kg/m 3aglite or apparent density be 1800～2800kg/m 3the combination of general aggregate and aglite; The combination of one or several that described admixture agent is water reducer, defoamer, thickening material, hardening accelerator, retardant or economization agent;
Wherein, cement consumption accounts for 5～40% of high-strength light cement-base composite material volume, and described mineral admixture accounts for 5～40% of high-strength light cement-base composite material volume; Described aggregate accounts for 30～80% of high-strength light cement-base composite material volume;
The particle diameter cumulative distribution curve that the proportioning mark of the each component of described gelling material is piled up curve and the each component of gelling material by ideal carries out numerical analysis;
1) the described desirable curve equation of piling up is:
P sd 100 · / m /；
Wherein, P sdfor particle is by the per-cent of sieve aperture, A is empirical constant, and d is sieve diameter, D maxfor the maximum particle diameter of particle;
The value of empirical constant A requires to determine by formula according to the design slump of high-strength light cement-base composite material or design divergence:
In the time of H≤220mm, A5H/H,
In the time of H > 220mm, A5LH/H,
L is divergence design load, and H is slump design load, H 0for the height 300mm of slump bucket;
2) the particle diameter cumulative distribution curve of the each component of gelling material:
To component cement required in gelling material, silicon ash, flyash and breeze after tested obtain cumulative distribution curve f separately c(d), f sf(d), f faand f (d) bs(d);
3) numerical analysis is as follows:
If it is X that cement accounts for the volume fraction of binder total amount c, the silicon ash volume fraction that accounts for binder total amount is X sf, the flyash volume fraction that accounts for binder total amount is X fathe volume fraction that accounts for binder total amount with breeze is X bs, and meet X c∈ [0.111,0.889], (X sf+ X fa+ X bs) ∈ [0.111,0.889], X c+ X sf+ X fa+ X bs=1;
Setting the particle diameter cumulative distribution curve of gelling material after mixing is:
P=X cf c(d)+X sff sf(d)+X faf fa(d)+X bsf bs(d)，
To the volume fraction X of each component c, X sf, X faand X bstaking 0.001～0.01 as step-length, exhaustive computations P in span separately, comparison curves P and P sd, calculate the standard deviation of the corresponding X-coordinate particle diameter of identical ordinate zou d, get the X of standard deviation minimum c, X sf, X faand X bsvalue is as each component proportion mark of gelling material;
The mass ratio W/B of the consumption of water and gelling material is 0.1～0.5, and wherein W represents the consumption of water, and B represents gelling material quality;
After mixing and stirring by the high-strength light cement-base composite material that calculates the preparation of gained proportioning, flowability properties is as follows:
Slump GB/T50080: >=10mm;
Or divergence GB/T50080: >=450mm;
The only just test in the time that high fluidity is slump > 220mm of the value of divergence, now concrete flowability is as the criterion with divergence;
After hardened material, performance is as follows:
Ultimate compression strength, normal curing 28d: >=20MPa;
Unit weight :≤1650kg/m 3.
2. high-strength light cement-base composite material according to claim 1, is characterized in that, described ordinate zou is chosen according to maximum value 100% decile, at least gets 5 values.
3. high-strength light cement-base composite material according to claim 1, is characterized in that, described W/B is 0.12 to 0.28.
4. high-strength light cement-base composite material according to claim 1, is characterized in that, described cement meets GB " general purpose portland cement " GB175; Described silicon ash meets " mortar and the reinforcement of concrete silicon ash " GB/T27690; Described flyash meets " for cement and concrete flyash " GB/T1596; Described breeze meets " for the GBFS of cement and concrete " GB/T18046; Water meets " the reinforcement of concrete water quality standard " JGJ63.
5. high-strength light cement-base composite material according to claim 1, it is characterized in that, aglite in described high-strength light cement-base composite material is the one or more combination of glass bead, pearlstone, expanded slag, swelling clay, float stone, vermiculite, light ceramic, granular polystyrene, and described general aggregate is the one or more combination of natural sand, artificial sand; The volume ratio of described aggregate and described gelling material is 0.5～4.0;
During for two or more aggregate of use, the cumulative distribution curve that the ratio of aggregate is piled up curve and various aggregates by ideal carries out numerical analysis;
1) described accumulation curve equation is:
P sdA 100 · A/ Am /；
Wherein, P sdAfor particles of aggregates is by the per-cent of sieve aperture, B is aggregate empirical constant, d afor aggregate sieve diameter, D amaxfor the maximum particle diameter of particles of aggregates;
The value of empirical constant B requires to determine by formula according to the slump of high-strength light cement-base composite material or divergence:
In the time of H≤220mm, B5H/H,
In the time of H > 220mm, B5LH/H,
L is divergence design load, and H is slump design load, H 0for the height 300mm of slump bucket;
2) the particle cumulative distribution curve of various aggregates:
Various aggregate screening tests are obtained to cumulative distribution curve f separately an(d);
F an(d) be n# aggregate, n=1～10;
3) numerical analysis is as follows:
If it is X that n# aggregate accounts for the volume fraction of aggregate total amount an, and meet ∑ X an1;
Setting the particle diameter cumulative distribution curve of aggregate after mixing is:
P A ∑X Anf A d；
To the volume fraction X of each component antaking 0.001～0.05 as step-length, exhaustive computations P in span separately a, comparison curves P aand P sdA, calculate the corresponding X-coordinate particle diameter of identical ordinate zou d astandard deviation, get the X of standard deviation minimum anvalue is as each component proportion mark of aggregate.
6. high-strength light cement-base composite material according to claim 5, is characterized in that, described ordinate zou is chosen according to maximum value 100% decile, at least gets 5 values.
7. high-strength light cement-base composite material according to claim 1, it is characterized in that, described water reducer is selected more than 25% water reducer of water-reducing rate, volume is 0.5%～5% of described gelling material quality, defoamer volume is 0.08%～2% of gelling material, thickening material volume is 0.005%～0.5% of gelling material, and retardant volume is cement material 0.005%～1.5%, and economization agent volume is gelling material 0.1%～5%.
8. high-strength light cement-base composite material according to claim 1, is characterized in that, the water-reducing rate of described water reducer is more than 30%, and volume is 0.5%～3% of described gelling material quality.
9. high-strength light cement-base composite material according to claim 1, it is characterized in that, in described high-strength light cement-base composite material, also add fiber, described fiber is steel fiber or non-metallic fibers, non-metallic fibers is polyvinyl alcohol fiber, polyethylene fibre, polypropylene fibre, polyacrylonitrile fibre, trevira, nylon fiber, cellulosic fibre, carbon fiber, glass fibre or basalt fibre, accounts for 0.05%～5% of described high-strength light cement-base composite material volume; The diameter of described fiber is 15～1000 μ m, and staple length is 1～100mm.
CN201410100422.6A 2014-03-18 2014-03-18 Lightweight high-strength cement based composite material Pending CN103896527A (en)

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Application publication date: 20140702