CN105837142B - A kind of microdilatancy type coral sand concrete and preparation method thereof - Google Patents
A kind of microdilatancy type coral sand concrete and preparation method thereof Download PDFInfo
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- CN105837142B CN105837142B CN201610251919.7A CN201610251919A CN105837142B CN 105837142 B CN105837142 B CN 105837142B CN 201610251919 A CN201610251919 A CN 201610251919A CN 105837142 B CN105837142 B CN 105837142B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/002—Water
- C04B22/0026—Salt water, e.g. seawater
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of microdilatancy type coral sand concrete and preparation method thereof.It is as follows that it forms meter in parts by weight：300~450 parts of cement, 15~45 parts of admixture, 600~725 parts of coral sand, 975~1150 parts of rubble, 165~205 parts of seawater, 3~7 parts of water reducer, 1.5~2.5 parts of liquid swelling agent；Wherein, the main component of the liquid swelling agent is the emulsion that higher fatty acids generates through saponification.The present invention utilizes a kind of concrete admixture liquid swelling agent, significantly improve and improve dry contraction and the volume stability of concrete, double expansion effectiveness substantially increase the compactness of concrete, the porosity of concrete is effectively made up and improves, so as to ensure that the volume stability of coral sand concrete.
Description
Technical field
The invention belongs to building material technical field, and in particular to a kind of microdilatancy type coral sand concrete and its preparation side
Method.
Background technology
From cement concrete material invention application so far, it studies the development that nearly 200 years are experienced with application.Its application
Widely, it is related to the engineering constructions such as highway, railway, bridge, tunnel, ocean, particularly country provides to Reef in Chinese South Sea in recent years
The attention and development in source so that concrete material has wider display stage in ocean engineering.By geographical position and environment
Influence, the resource on the most of islands and reefs in the South Sea needs to be developed and utilized, and the construction of ocean islands and reefs engineering be unable to do without concrete
With being accumulated on islands and reefs has substantial amounts of coral aggregate such as coral reef, coral sand, and this special coral aggregate is exploitation ocean work
Cheng Jianshe provides abundant raw material resources.It is continuous for South China Sea islands controversial issue in recent years, it should more protect under these circumstances
On the premise of protecting sea island ecosystem environment, coral concrete is prepared using the coral sand of islands and reefs or periphery, so can not only be saved
Financial cost, can also solve the source of aggregate, have very important significance and be worth for ocean engineering construction.
Compared with common river sand, coral sand has higher water absorption rate and porosity, and this allows for preparing coral sand
Need to increase water consumption and water reducer dosage during concrete.Although the coral sand concrete prepared has light, heat-insulation and heat-preservation
Can be good the advantages that, but easily cause to dry because water requirement is larger and shrink comparatively fast, intensity is relatively low and volume stability of concrete is bad
The defects of, thus ill effect can be produced to the long durability of coral sand concrete.In order to give full play to coral sand
In the effect of ocean engineering construction, we, which need badly, takes technological means and measure to tackle this phenomenon and problem.
The content of the invention
Present invention aims at existing coral sand concrete is improved, it is good that a kind of intensity height, volume stability is prepared
Microdilatancy type coral sand concrete.
It is as follows using technical scheme to reach above-mentioned purpose：
A kind of microdilatancy type coral sand concrete, it is as follows that it forms meter in parts by weight：
300~450 parts of cement, 15~45 parts of admixture, 600~725 parts of coral sand, 975~1150 parts broken
Stone, 165~205 parts of seawater, 3~7 parts of water reducer, 1.5~2.5 parts of liquid swelling agent；
Wherein, the main component of the liquid swelling agent is the emulsion that higher fatty acids generates through saponification.
By such scheme, the liquid swelling agent is prepared as follows：
Add higher fatty acids, sodium hydroxide, catalyst into reaction vessel, and heating stirring, temperature control 60~
75 DEG C, after reacting 5~8h, saturated sodium-chloride is added to remove glycerine and separate out higher fatty acids sodium；Continue to be heated to 75~90
DEG C, opacifiers, diffusant are added, after fully reacting 1~2h, it is 7.0 or so to be cooled to room temperature to add hydrochloric acid to be neutralized to pH value, filtering
Isolated liquid swelling agent.
It is as follows by such scheme, its raw materials by weight portion meter：
By such scheme, the higher fatty acids is at least one of stearic acid, palmitic acid, oleic acid, linoleic acid.
By such scheme, the catalyst is at least one of ethanol, propyl alcohol, ethylene glycol, propane diols.
By such scheme, the opacifiers is AEO, aliphatic amine polyoxyethylene ether, alkyl phenol polyoxy second
At least one of alkene ether, phenethyl phenol polyethenoxy ether.
By such scheme, the diffusant is alkylbenzenesulfonate, alkylnaphthalene sulfonate, alkylsulfonate, alkyl phosphoric acid
At least one of salt.
By such scheme, the cement is in Portland cement, portland slag cement, composite Portland cement
It is one or two kinds of.
By such scheme, the admixture is at least one of metakaolin, graining blast-furnace cinder micro-powder, SILICA FUME.
By such scheme, the modulus of fineness of the coral sand is 2.5~3.0, and bulk density is 1120~1180kg/m3。
By such scheme, the rubble is basaltic broken stone, and bulk density is 1580~1760kg/m3, crush values be 7~
9%, clay content 0.1~0.4%；The basaltic broken stone is by 0~5mm, 5~10mm, 10~20mm continuous grading rubble group
Into.
By such scheme, the water reducer is polycarboxylate water-reducer, naphthalene water reducer, aliphatic water reducing agent, sulfamic acid
At least one of salt water reducer.
The preparation method of above-mentioned microdilatancy type coral sand concrete, comprises the following steps：
By 300~450 parts of cement, 15~45 parts of admixture, 600~725 parts of coral sand, 975~1150 parts
Rubble be placed in machine mixer stir 1~2min it is uniform after, it is then 3~7 parts of water reducer and 1.5~2.5 parts of liquid is swollen
The seawater of swollen dose of well mixed rear 165~205 parts of companion together pours into, and continues 1~2min of stirring and microdilatancy type coral is uniformly made
Coral sand concrete.
Liquid swelling agent can effectively improve the shrinkage of coral sand concrete, it has as a kind of additive product
Volume is small, chloride ion content is low, expansion stability it is good, with other additive applicabilities it is good, economic and environment-friendly the features such as.Liquid expands
Agent mainly makes concrete produce microdilatancy by binder materials such as the interior expansion component having and cement in hydration reaction early stage generation
Product carry out the plastic shrinkage of compensating concrete.
The beneficial effects of the present invention are：
The present invention substitutes common river sand and fresh water using the coral sand on the islands and reefs of ocean and seawater, is truly realized raw material
Local use, so realize reduce raw material cost of transportation and improve coral sand utilization rate purpose and meaning.
The present invention utilizes a kind of concrete admixture liquid swelling agent, hence it is evident that improves and improves drying for concrete and shrinks
And volume stability, the use of liquid swelling agent realize binder materials hydration rate and paste structure shape in coral sand concrete
Synchronization into speed is carried out, and the early stage hydrated product intensity of coral sand inside concrete binder materials is relatively low, and now liquid expands
The effect of agent is more obvious；And when the aquation later stage, coral sand concrete strength was higher, the effect of liquid swelling agent eases up, early stage
Larger plastic expansion adds later stage certain expansion, is so achieved that the effects of double expansions.Double expansion effectiveness fully carry
The high compactness of concrete, the porosity of concrete is effectively made up and improves, so as to ensure that the body of coral sand concrete
Product stability.
Embodiment
Following examples further explain technical scheme, but not as limiting the scope of the invention.
The preparation embodiment of liquid swelling agent：
Embodiment 1
The stearic acid of 115 parts of addition, 120 parts of sodium hydroxide, 0.5 part of absolute ethyl alcohol, heating stirring are equal in flask
Even, it is 70 DEG C to control heating-up temperature, reaction time 7h；
Add saturated sodium-chloride and separate out odium stearate, be warming up to 85 DEG C, add 0.08 part of aliphatic amine polyoxyethylene ether,
0.03 part of alkylbenzenesulfonate, room temperature is cooled to after fully reacting 1h；
It is 6.7 that the hydrochloric acid of 50 parts of addition, which carries out being neutralized to PH, and it is liquid expansion to be separated by filtration after cleaning and obtain emulsion
Agent.
Embodiment 2
The oleic acid of 96 parts of addition in flask, 105 parts of sodium hydroxide, 0.2 part of absolute ethyl alcohol, 0.1 part of ethylene glycol,
Heating stirring is uniform, and it is 65 DEG C to control heating-up temperature, reaction time 6.5h；
Add saturated sodium-chloride and separate out odium stearate, be warming up to 90 DEG C, add 0.05 part APES and
0.04 part of AEO, 0.02 part of alkylbenzenesulfonate and 0.03 part of alkylnaphthalene sulfonate, fully reaction
Room temperature is cooled to after 1.5h；
It is 6.9 that the hydrochloric acid of 45 parts of addition, which carries out being neutralized to PH, and it is liquid expansion to be separated by filtration after cleaning and obtain emulsion
Agent.
Embodiment 3
Add 85 parts of oleic acid and 35 parts of linoleic acid in flask, 130 parts of sodium hydroxide, 0.5 part of ethylene glycol and
0.3 part of propane diols, heating stirring is uniform, and it is 70 DEG C to control heating-up temperature, reaction time 7h；
Add saturated sodium-chloride and separate out odium stearate, be warming up to 85 DEG C, add 0.03 part APES and
0.06 part of phenethyl phenol polyethenoxy ether, 0.05 part of alkylsulfonate and 0.04 part of alkylphosphonic, fully react 2h
After be cooled to room temperature；
It is 6.8 that the hydrochloric acid of 70 parts of addition, which carries out being neutralized to PH, and it is liquid expansion to be separated by filtration after cleaning and obtain emulsion
Agent.
Embodiment 4
A kind of microdilatancy type coral sand concrete, its material mixture ratio：42.5 380 parts of Portland cements, micro- wollastonite powder
25 parts, 650 parts of coral sand, 975 parts of basaltic broken stone, 180 parts of seawater, 5 parts of aliphatic water reducing agent, liquid swelling agent fills respectively
1.6th, 2.0,2.4 parts.Stirred after 3~4min, poured to 100mm × 100mm × 100mm and 100mm with machine mixer
In × 100mm × 515mm concrete test die, jolt ramming shaping, conserved under the conditions of mark is supported to 3d, 7d and 28d and measure examination body
Length and compression strength.The tensile strain rate of test specimen is calculated using equation below：
In formula：εtTensile strain rate during-t ages, %；
LtExamination body length during-t ages, mm；
L-initial length measured value, mm；
L0- examination body datum length, mm.
The compression strength of table 1 and drying shrinkage
Table 1 illustrates：Fill the compression strength that coral sand concrete is not only increased after appropriate liquid swelling agent, Er Qieming
The aobvious drying shrinkage for reducing coral sand concrete；When liquid swelling agent volume is 2.0%, the coral sand of different larval instar mixes
It is best to coagulate the compression strength of soil, drying shrinkage is minimum.
Embodiment 5
A kind of microdilatancy type coral sand concrete, its material mixture ratio：42.5 400 parts of Portland cements, 42.5 slags
80 parts of portland cement, 20 parts of metakaolin, 675 parts of coral sand, 1035 parts of basaltic broken stone, 195 parts of seawater, polycarboxylic acids diminishing
4.8 parts of agent, liquid swelling agent fill 1.5,1.9,2.3 parts respectively.Stirred with machine mixer after 3~4min, pour to
In 100mm × 100mm × 100mm and 100mm × 100mm × 515mm concrete test die, jolt ramming shaping, under the conditions of mark is supported
Conserve to 3d, 7d and 28d and measure the length and compression strength of examination body.
The compression strength of table 2 and drying shrinkage
Table 2 illustrates：Fill the compression strength that coral sand concrete is not only increased after appropriate liquid swelling agent, Er Qieming
The aobvious drying shrinkage for reducing coral sand concrete, when liquid swelling agent volume is 1.9%, the coral sand of different larval instar mixes
It is best to coagulate the compression strength of soil, drying shrinkage is minimum.
Embodiment 6
A kind of microdilatancy type coral sand concrete, its material mixture ratio：42.5 360 parts of composite Portland cements, 42.5 slags
50 parts of portland cement, 10 parts of metakaolin, 10 parts of ground granulated blast furnace slag, 695 parts of coral sand, 1015 parts of basaltic broken stone,
190 parts of seawater, 5.4 parts of naphthalene water reducer, liquid swelling agent fill 1.5,2.0,2.5 parts respectively.It is equal with machine mixer stirring
After even 3~4min, pour to 100mm × 100mm × 100mm and 100mm × 100mm × 515mm concrete test die, jolt ramming
Shaping, conserved under the conditions of mark is supported to 3d, 7d and 28d and measure the length and compression strength of examination body.
The compression strength of table 3 and drying shrinkage
Table 3 illustrates：The compression strength of coral sand concrete can not only be improved after appropriate liquid swelling agent by filling, and
Also significantly reduce the drying shrinkage of coral sand concrete；When liquid swelling agent volume is 2.0%, the coral of different larval instar
The compression strength highest of sand concrete, drying shrinkage are minimum.
Claims (9)
1. a kind of microdilatancy type coral sand concrete, it is characterised in that composition is counted as follows in parts by weight：
300~450 parts of cement, 15~45 parts of admixture, 600~725 parts of coral sand, 975~1150 parts of rubble,
165~205 parts of seawater, 3~7 parts of water reducer, 1.5~2.5 parts of liquid swelling agent；
Wherein, the main component of the liquid swelling agent is the emulsion that higher fatty acids generates through saponification；
The liquid swelling agent is prepared as follows：
Add higher fatty acids, sodium hydroxide, catalyst into reaction vessel, and heating stirring, temperature control at 60~75 DEG C,
After reacting 5~8h, saturated sodium-chloride is added to remove glycerine and separate out higher fatty acids sodium；Continue to be heated to 75~90 DEG C, add
Enter opacifiers, diffusant, fully react 1~2h after, be cooled to room temperature add hydrochloric acid be neutralized to pH values be 7.0, be separated by filtration to obtain
Liquid swelling agent；The opacifiers is AEO, aliphatic amine polyoxyethylene ether, APES, benzene
At least one of ethyl phenol polyethenoxy ether.
2. microdilatancy type coral sand concrete as claimed in claim 1, it is characterised in that the raw material of the liquid swelling agent is pressed
Parts by weight meter is as follows：
3. microdilatancy type coral sand concrete as claimed in claim 1, it is characterised in that the higher fatty acids be stearic acid,
At least one of palmitic acid, oleic acid, linoleic acid.
4. microdilatancy type coral sand concrete as claimed in claim 1, it is characterised in that the catalyst be ethanol, propyl alcohol,
At least one of ethylene glycol, propane diols.
5. microdilatancy type coral sand concrete as claimed in claim 1, it is characterised in that the diffusant is alkyl benzene sulphonate
At least one of salt, alkylnaphthalene sulfonate, alkylsulfonate, alkylphosphonic.
6. microdilatancy type coral sand concrete as claimed in claim 1, it is characterised in that the cement is normal silicate water
One or both of mud, portland slag cement, composite Portland cement.
7. microdilatancy type coral sand concrete as claimed in claim 1, it is characterised in that the admixture is metakaolin, grain
Change at least one of blast-furnace cinder micro-powder, SILICA FUME；The water reducer is polycarboxylate water-reducer, naphthalene water reducer, aliphatic
At least one of water reducer, sulfamate water reducer.
8. microdilatancy type coral sand concrete as claimed in claim 1, it is characterised in that the modulus of fineness of the coral sand is
2.5~3.0, bulk density is 1120~1180kg/m3；The rubble is basaltic broken stone, bulk density is 1580~
1760kg/m3, crush values be 7~9%, clay content 0.1~0.4%, the basaltic broken stone by 0~5mm, 5~10mm, 10~
20mm continuous grading rubble composition.
9. the preparation method of the microdilatancy type coral sand concrete described in claim 1, it is characterised in that comprise the following steps：
By 300~450 parts of cement, 15~45 parts of admixture, 600~725 parts of coral sand, 975~1150 parts of rubble
Be placed in machine mixer stir 1~2min it is uniform after, then by 3~7 parts of water reducer and 1.5~2.5 parts of liquid swelling agent
Together poured into company with 165~205 parts of seawater after well mixed, continue 1~2min of stirring and microdilatancy type coral sand is uniformly made
Concrete.
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| CN107986650B (en) * | 2017-11-30 | 2021-06-11 | 嘉华特种水泥股份有限公司 | Concrete cementing material |
| CN110171940B (en) * | 2019-04-11 | 2021-09-14 | 武汉理工大学 | Coral sand admixture and preparation method and application thereof |
| CN110372298B (en) * | 2019-07-24 | 2021-11-16 | 桂林理工大学 | Preparation method of high-strength coral concrete |
| CN111268962A (en) * | 2019-12-02 | 2020-06-12 | 哈尔滨工程大学 | Dark portland cement concrete for inducing adhesion of marine periphyton and preparation method thereof |
| CN110984461B (en) * | 2019-12-27 | 2021-04-30 | 中国矿业大学 | Seawater coral aggregate concrete block with built-in FRP rib framework and construction method |
| CN111875321B (en) * | 2020-07-02 | 2021-10-22 | 中铁桥研科技有限公司 | Underwater repair material based on seawater and coral sand and preparation method thereof |
| CN112430039A (en) * | 2020-12-07 | 2021-03-02 | 北京金隅混凝土有限公司 | Ultrahigh-performance concrete and preparation method thereof |
| CN112500091A (en) * | 2021-01-22 | 2021-03-16 | 湘潭大学 | Chloride ion permeation resistant mortar for ocean engineering and preparation method thereof |
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| JP2010229016A (en) * | 2009-03-06 | 2010-10-14 | Nippon Shokubai Co Ltd | Concrete composition |
| CN103342498B (en) * | 2013-07-10 | 2014-10-01 | 南京瑞迪高新技术有限公司 | Liquid plasticity expanding agent special for CA (Cellulose Acetate) mortar and preparation method thereof |
| CN104129960B (en) * | 2014-08-09 | 2016-04-06 | 桂林理工大学 | A kind of polypropylene fibre coral concrete and preparation method thereof |
| CN104609806B (en) * | 2015-01-27 | 2017-01-04 | 中国人民解放军总后勤部建筑工程研究所 | A kind of sea water mixes foster coral sand artificial aggregate's concrete segment and preparation method thereof |
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