CN109574585A - A kind of water-tight concrete and its construction method - Google Patents
A kind of water-tight concrete and its construction method Download PDFInfo
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- CN109574585A CN109574585A CN201811471955.XA CN201811471955A CN109574585A CN 109574585 A CN109574585 A CN 109574585A CN 201811471955 A CN201811471955 A CN 201811471955A CN 109574585 A CN109574585 A CN 109574585A
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- 239000004568 cement Substances 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 25
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- 230000000996 additive effect Effects 0.000 claims abstract description 19
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 18
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- 239000010881 fly ash Substances 0.000 claims abstract description 17
- 238000004078 waterproofing Methods 0.000 claims abstract description 17
- 239000004615 ingredient Substances 0.000 claims abstract description 8
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- 239000011398 Portland cement Substances 0.000 claims description 10
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 10
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 10
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical group [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 6
- 239000004927 clay Substances 0.000 claims description 5
- 229920005646 polycarboxylate Polymers 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
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- 229910052791 calcium Inorganic materials 0.000 description 2
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- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
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- 239000002956 ash Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
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Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D15/00—Apparatus or tools for roof working
- E04D15/07—Apparatus or tools for roof working for handling roofing or sealing material in bulk form
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of water-tight concrete, raw material of constructing includes the ingredient of following parts by weight: 90~110 parts of cement, 300~360 parts of coarse aggregate, 230~270 parts of fine aggregate, 50~80 parts of flyash, 20~40 parts of additive, 50~60 parts of water；It include air entraining agent, impervious fiber, swelling agent, water-reducing agent, waterproofing agent in the additive.Water-tight concrete total alkali content < the 2.25kg/m3, raw material is simply easy for construction.Air entraining agent of the present invention changes inside concrete pore structure, and capillary channel is truncated；Impervious fiber fracture has blocking effect, reduces the brittleness of concrete.Water-tight concrete provided by the invention is used for the construction of roof structure, it is agitated, pour, vibrate, conserving after, the anti-permeability strength of water-tight concrete is much larger than normal concrete anti-permeability strength, and the test of progress 14 days is impermeable water-tight, and weatherability is not stronger easy to crack.
Description
Technical field
The present invention relates to the technical field of concrete, in particular to a kind of water-tight concrete and its construction method.
Background technique
Roof is the guard member and load-carrying members of building top layer, height, the residence of waterproof performance and construction quality
Safety firmly and comfort level are closely related.However, there are problems that more serious roof water-proof in most building construction at present,
Leakage phenomenon happens occasionally, and has seriously affected construction quality and the interests of occupant.Some old roof structures are by supporting course
It is constituted with waterproof layer, using precast hollow slab as supporting course, coil waterproof layer, this room is then laid on precast hollow slab
Roof construction inevitably leaks at the weak links such as parapet and gutter bead.The problem of especially severe is waterproof layer
There are many reason of being also possible to will appear crack after the completion of construction and leak, generating crack: climate change and shining upon causes
Roofing expand with heat and contract with cold；Buckling deformation after roof boarding stress；The reasons such as settlement of foundation or the slurry contraction of wall load-bearing recoil cause
Roofing change；Waterproof layer material itself is dry-shrinkage deformed etc..
In order to overcome the defect of waterproof layer cracking, in existing roof structure waterproof layer usually select high temperature not trickle, low temperature
Not fragmentation, unsuitable aging, good water-proof effect waterproof material.There are also building roofs to be laid with layer flexible waterproof layer, room
Often there is " three floors of tarred felt and four floors of tar " or " two felts, three oil " in top, is handled in conjunction with PVC cement or PVC coating.In recent years, though
Right some waterproof materials also start to come into operation, and put into roof construction has EPDM membrane, but due to leakproof room
The raw material and construction method of roof construction concrete without relevant criterion, can not all be kept away completely only by waterproof layer is improved
Exempt from the generation of roof leakage phenomenon, and multilayer flashing layer construction is relatively complicated and higher cost.
Chinese patent CN101224968A discloses a kind of marine durable cement concrete, using cementitious material, aggregate, subtracts
Aqua, additive mix and stir, and cementitious material uses cement, miberal powder, flyash, and additive selects paraffin and rosin, improve
The intensity and corrosion resistance of durability concrete for maritime work, reduce contraction of the concrete under long-term Soaking environment to a certain extent
Cracking.Also this marine durable cement concrete is used for basement by someone, can prevent underground wet environment from invading wall
Erosion.But due to the particularity of roof structure, it need to be subjected to that summer is exposed to the sun, winter freezing, sleet erosion, solar radiation etc. destroy,
The long-term anticracking of roof structure, impervious particular/special requirement is still not achieved in the structure of current this durability concrete for maritime work.Therefore, needle
To now cleithral concrete bearing layer and waterproof layer structure, a kind of inexpensive and high weatherability preventing water leakage roof how is configured
Structure concrete becomes those skilled in the art's key problem to be solved.
Summary of the invention
In view of this, it is an object of that present invention to provide a kind of water-tight concrete and its construction method, it is provided by the invention anti-
It is low to seep concrete cost of material, impervious waterproofness is high, which is mixed and stirred, carries out simply conserving i.e. again after pouring molding
Can, construction is simple is convenient, can resist the generation of the cracking and percolating water of roof structure caused by long-time climate change.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of water-tight concrete, the water-tight concrete construction raw material include following parts by weight at
Point: 90~110 parts of cement, 300~360 parts of coarse aggregate, 230~270 parts of fine aggregate, 50~80 parts of flyash, additive 20~
40 parts, 50~60 parts of water；
The additive includes air entraining agent, impervious fiber, swelling agent, water-reducing agent, waterproofing agent；
Total alkali content < 2.25kg/m of the water-tight concrete3。
Preferably, the cement is ordinary portland cement, and the ordinary portland cement is non-early-strength, seven days aquations
Heating index < 275kJ/kg, the compression strength > 32.5MPa of 28d.
Preferably, the coarse aggregate uses partial size to obtain for the machine macadam gradating of 5~31.5mm, and the machine rubble contains mud
Amount < 1%.
Preferably, the fine aggregate use fineness modulus for 2.5~3.0 medium coarse sand, the clay content of the medium coarse sand <
3%.
Preferably, the air entraining agent is rosin or rosin polycondensate.
Preferably, the impervious fiber is polypropylene fibre.
Preferably, the swelling agent is UEA composite expansive agents for concrete.
Preferably, the water-reducing agent is polycarboxylate dehydragent.
Preferably, the waterproofing agent is aluminum sulfate.
The present invention provides a kind of construction methods of water-tight concrete, include the following steps:
(1) cement, coarse aggregate, fine aggregate, flyash are stirred evenly；
(2) air entraining agent, impervious fiber, swelling agent, water-reducing agent, waterproofing agent is added and is uniformly mixing to obtain water-tight concrete；
(3) water-tight concrete is poured into the roof with bar construction, large-area backplane and top plate grouping pour, pool wall
Stratified continuous pouring；
(4) machinery is carried out after the completion of pouring to vibrate, and in the mechanical inconvenient preformed hole that vibrates, built-in pipe, built-in fitting and is stopped
The junction of water band, which increases, manually to be plugged and pounded；
(5) water-tight concrete after vibrating and manually plugging and pounding is conserved.
The utility model has the advantages that the raw material of water-tight concrete provided by the invention includes the ingredient of following parts by weight: cement 90~110
Part, 300~360 parts of coarse aggregate, 230~270 parts of fine aggregate, 50~80 parts of flyash, 20~40 parts of additive, water 50~60
Part；Wherein additive includes air entraining agent, impervious fiber, swelling agent, water-reducing agent, waterproofing agent.Water-tight concrete provided by the invention
Cost of material is low, by the reasonable selection and control dosage of raw material, improves the structural behaviour of concrete, improves the impervious of itself
Property.The present invention further increases the comprehensive waterproof function of water-tight concrete by being used in mixed way for a variety of additives, this is impervious mixed
Solidifying soil has both two kinds of functions of waterproof and load-bearing.
The present invention uses air entraining agent, and inside concrete is made to generate disconnected bubble, and capillary channel is truncated, and changes hole
Structure, to improve the impermeability of concrete.The present invention uses impervious fiber, is main characterization with the blocking effect of fracture,
Actually since the impervious fiber of low-elasticity-modulus adds in the concrete of relatively high-elastic mould, the essence of effect is to drop most possibly
The low brittleness of concrete, thus solve the problems, such as since the congenital bring of concrete is because being easy cracking caused by brittleness, it is right
Improve concrete inner structure and plays important function.
Construction of Impermeable Concrete method provided by the invention is simple and convenient, agitated, pour, vibrate, conserving and can meet
The construction of impervious Watertight roof structure.
Embodiment the result shows that, water-tight concrete provided by the invention be used for roof structure construction, after maintenance resist
The anti-permeability strength for seeping concrete is much larger than normal concrete, and the test of progress 14 days is impermeable water-tight, does not crack significantly
Phenomenon.
Specific embodiment
The present invention provides a kind of water-tight concrete, the raw material of the water-tight concrete includes the ingredient of following parts by weight:
90~110 parts of cement, 300~360 parts of coarse aggregate, 230~270 parts of fine aggregate, 50~80 parts of flyash, additive 20~40
Part, 50~60 parts of water；It include air entraining agent, impervious fiber, swelling agent, water-reducing agent, waterproofing agent in the additive；It is described impervious mixed
Coagulate total alkali content < 2.25kg/m of soil3。
In the present invention, in parts by weight, the raw material of the water-tight concrete includes 90~110 parts of cement, and preferably 95
~105 parts, more preferably 100 parts.In the present invention, the cement is preferably ordinary portland cement, present invention preferably uses
The ordinary portland cement of non-early-strength, seven days aquation heating indexes of the cement that uses of the present invention preferably < 275kJ/kg, 28d's is anti-
The preferred > 32.5MPa of Compressive Strength.Ordinary portland cement of the present invention is also known as ordinary cement, be by Portland clinker,
Hydraulic cementing materials made of the mixing material and proper amount of gypsum of 5%-20% is levigate has hydration reaction speed fast, early stage
The high feature with later strength, the closely knit freexing tolerance of structure can be good.In the present invention, the preferable concrete of water permeability resistance in order to obtain
Pore structure should be avoided using the early-strength ordinary portland cement in label with R, to prevent water-tight concrete premature hardening.
In the present invention, in parts by weight, the raw material of the water-tight concrete includes 300~360 parts of coarse aggregate, preferably
320~340 parts, more preferably 330 parts.In the present invention, the coarse aggregate preferably uses partial size for the machine rubble of 5~31.5mm
Gradation obtains, clay content < 1% of the machine rubble.In the present invention, the gradation of rubble is mainly adjusted by the discharge of crusher
Mouthful size and the screening efficiency of vibrating screen guarantee, for three-graded concrete, the institute of M40~80, M20~40 and M5~20
Accounting example is different, is estimated generally according to 30%, 40%, 30%, in actual production according to the concrete condition of construction site into
Row adjustment.In the present invention, the elongated particles of concrete coarse aggregate generally answer≤25% (by weight), and gill shape building stones produce
Raw reason is related with the processing equipment and production technology of selection mainly other than the physical characteristic of building stones itself.
In the present invention, in parts by weight, the raw material of the water-tight concrete includes 230~270 parts of fine aggregate, preferably
240~260 parts, more preferably 250 parts.In the present invention, the fine aggregate preferably uses fineness modulus in 2.5~3.0
Coarse sand more preferably uses fineness modulus for 2.7~2.8 medium coarse sand, and the clay content of the medium coarse sand is preferably < 3%.In the present invention
In specific embodiment in, be more preferably used in mixed way using two or more the medium coarse sand of different fineness modulus,
Because if only using a kind of sand of thickness, gap is maximum, and the sand collocation of two kinds of partial sizes is got up, and gap is reduced, a variety of
The sand of partial size is arranged in pairs or groups, and gap is smaller.
In the present invention, in parts by weight, the raw material of the water-tight concrete includes 50~80 parts of flyash, and preferably 60
~70 parts, more preferably 65 parts.In the present invention, the rank of the flyash is not less than II grade, must not use high-calcium fly ass,
High-calcium fly ass alkalinity is high, and water imbibition is high, is unfavorable for the construction of water-tight concrete, and the present invention should also use alkali content
Lower ordinary portland cement, with guarantee the total alkali content in final water-tight concrete provided by the invention preferably < 2.25kg/
m3, to make the admixture itself of concrete that there is preferable impervious preventing water leakage basis.
In the present invention, in parts by weight, the raw material of the water-tight concrete includes 20~40 parts of additive, and preferably 25
~35 parts, more preferably 30 parts.In the present invention, the additive preferably includes air entraining agent, impervious fiber, swelling agent, diminishing
Agent, waterproofing agent.The present invention is not specific to the mixed dosage of the air entraining agent, impervious fiber, swelling agent, water-reducing agent, waterproofing agent
It is required that being added combination according to the demand of those skilled in the art, its respective function can be realized.
In the present invention, the air entraining agent is preferably rosin or rosin polycondensate.The system of rosin polycondensate of the present invention
Preparation Method preferably includes: being uniformly mixed after rosin and lignin heating fusing, isomerization product A is made in isomerization；To isomerization
Maleic anhydride or maleic anhydride is added in product A and synthetic resin B is made in the concentrated sulfuric acid, polycondensation；Poly- second two is added into resin B
Alcohol is additionally added glycerine and/or the concentrated sulfuric acid, and grafting, which is esterified, is made esterification products C；Add foam stabilizing component, heat preservation into esterification products C
Reaction；Cooling, lye neutralize, and control pH=8~13, and insulation reaction is added dropwise tap water, makes solid content 30 ± 1%, and pine is made
Fragrant polycondensate air-entraining agent.Rosin polycondensate air-entraining agent prepared by the present invention has good water soluble characteristic, bleed performance and bubble
Retention property is more suitable for the Anti-permeation concrete of roof structure.
In the present invention, the impervious fiber is preferably polypropylene fibre, more preferably Netted flap.In this hair
In bright, its appearance of Netted flap is that the mutual commissure of plurality of fibers monofilament forms reticular structure；Work as mesh polypropylene-fibre
After putting into concrete, in concrete whipping process, the transverse direction between fibre single thread links the rubbing through concrete itself and rubs
Wiping is acted on and is destroyed, and forms fibre single thread or reticular structure sufficiently opens, to realize that large number of polypropylene fibre is uniformly mixed
Enter the effect in concrete.
In the present invention, the swelling agent is preferably UEA composite expansive agents for concrete.In the present invention, the UEA is compound
Cement expansive material is the mixture being combined by aluminum sulfate, aluminium oxide, aluminum aluminum sulfate and calcium sulfate and carrier, and appearance is ash
White powder product, the easy moisture absorption.In the present invention, UEA is mixed in portland cement can be improved the anti-crack and anti-seepage of concrete, compensation
The performances such as contraction, seif-citing rate can improve concrete strength to reinforcing bar non-corroding, enhance anti-freezing property；UEA composite concrete is swollen
Swollen dose can be improved the compactness of concrete, reach anti-crack and anti-seepage effect by the continuous fill concrete hole of expansion crystallographic.
In the present invention, the preferred polycarboxylate dehydragent of the water-reducing agent, polycarboxylate dehydragent low, diminishing with volume
The high feature of rate, is able to maintain more long water-reducing effect.The present invention is to the source of polycarboxylate dehydragent without particular/special requirement.
In the present invention, the waterproofing agent is preferably aluminum sulfate.In the present invention, the aluminum sulfate can effectively improve coagulation
Native capillary structure, while gel is precipitated, inside concrete capillary porosity duct is blocked, compared with not adding waterproofing agent, anti-permeability performance
It can be improved 5~8 times, there is permanent water-resistant effect.
In the present invention, in parts by weight, the raw material of the water-tight concrete includes 50~60 parts of water, preferably 55 parts.
In a specific embodiment of the present invention, currently preferred cement mortar proportion is water: cement: fine aggregate=0.55: 1: 2.5.
The present invention mixes concrete preferably, when stirring, each material was mixed by rationally controlling the ratio of water and cement and medium coarse sand
It closes uniformly, the hole of concrete is few, and the later period is easy to conserve raising performance.
The present invention provides the construction methods of the water-tight concrete described in above scheme, include the following steps:
(1) cement, coarse aggregate, fine aggregate, flyash are added water and stirred uniformly, obtains just mixing；
(2) air entraining agent, impervious fiber, swelling agent, water-reducing agent, waterproofing agent is added into the just mixing to be uniformly mixing to obtain
Water-tight concrete；
(3) water-tight concrete is poured into the roof with bar construction, large-area backplane and top plate grouping pour, pool wall
Stratified continuous pouring；
(4) machinery is carried out after the completion of pouring to vibrate, and in the mechanical inconvenient preformed hole that vibrates, built-in pipe, built-in fitting and is stopped
The junction of water band, which increases, manually to be plugged and pounded；
(5) concrete after vibrating or manually plugging and pounding is conserved.
The present invention adds water and stirs cement, coarse aggregate, fine aggregate, flyash uniformly.The present invention equipment used to stirring
There is no particular/special requirement with agitating mode, using mixing plant well known to those skilled in the art and stirring means.
After mixing evenly by admixture, air entraining agent, impervious fiber, swelling agent, water-reducing agent, waterproofing agent stirring is added in the present invention
Water-tight concrete uniformly can be obtained.The present invention does not have particular/special requirement to the addition sequencing of all kinds of additives.
After obtaining water-tight concrete, water-tight concrete is poured into the roof with bar construction, large area bottom by the present invention
Plate and top plate grouping pour, pool wall stratified continuous pouring.The present invention is to the mechanical equipment used when pouring without particular/special requirement.
After the completion of pouring, the present invention carries out machinery and vibrates, in the mechanical inconvenient preformed hole, built-in pipe, built-in fitting of vibrating
And the junction increase of waterstop manually plugs and pounds.
After machinery vibrates and manually plugs and pounds, the present invention conserves concrete.In specific embodiments of the present invention
In, water-tight concrete is covered according to scene temperature condition in time preferably and sprinkling maintenance, the sprinkling maintenance time are greater than 14
It is to get the roof structure poured to water-tight concrete integration.
Water-tight concrete provided by the invention and its construction method are described in detail below with reference to embodiment, still
They cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
A kind of water-tight concrete, raw material include the ingredient of following parts by weight: 100 parts of cement, 330 parts of coarse aggregate, thin bone
Material 250 parts, 65 parts of flyash, 30 parts of additive (6 parts of air entraining agent, 6 parts of impervious fiber, 6 parts of swelling agent, 6 parts of water-reducing agent, waterproof
6 parts of agent), 55 parts of water；The specific raw material of the present embodiment is shown in Table 1.
The construction method of above-mentioned water-tight concrete, includes the following steps:
Cement, coarse aggregate, fine aggregate, flyash are added water and stirred uniformly；Sequentially add air entraining agent, impervious fiber, expansion
Agent, water-reducing agent, waterproofing agent are uniformly mixing to obtain water-tight concrete；Water-tight concrete is poured into the roof with bar construction,
Large-area backplane and top plate grouping pour, pool wall stratified continuous pouring；Machinery is carried out after the completion of pouring to vibrate, and is vibrated not in machinery
Easily the junction of preformed hole, built-in pipe, built-in fitting and waterstop increases and manually plugs and pounds；Finally according to live temperature condition and
When covering and sprinkling maintenance, the sprinkling maintenance time be greater than 14 days.
The anti-of 28D is carried out to the roof structure of water-tight concrete prepared by embodiment 1 according to the relevant criterion of GB-50164
Permeability performance is checked and accepted, the results showed that, water-tight concrete roof structure prepared by the embodiment of the present invention 1 has reached P12 grade, carries out
14 days follow-on tests are impermeable water-tight, have excellent water permeability resistance energy；The water-tight concrete roof structure also has good
Good cold-and-heat resistent alternating, prevents the characteristics of cracking.
In order to verify the advantage of water-tight concrete of the invention, the present invention targetedly changes the additional of water-tight concrete
The type of agent is added using the additive in normal concrete, and specific implementation method is as follows:
Comparative example 1
A kind of normal concrete, raw material include the ingredient of following parts by weight: 100 parts of cement, 330 parts of coarse aggregate, thin bone
Material 250 parts, 65 parts of flyash, 30 parts of additive (6 parts of air entraining agent, 6 parts of impervious fiber, 6 parts of swelling agent, 6 parts of water-reducing agent, waterproof
6 parts of agent), 55 parts of water；The specific raw material of this comparative example is shown in Table 1, and the specific raw material of this comparative example is shown in Table 1, and normal concrete is applied
Work method is consistent with the construction method of embodiment 1.
Comparative example 2
A kind of normal concrete, raw material include the ingredient of following parts by weight: 90 parts of cement, 360 parts of coarse aggregate, fine aggregate
240 parts, 70 parts of flyash, 30 parts of additive (6 parts of air entraining agent, 6 parts of impervious fiber, 6 parts of swelling agent, 6 parts of water-reducing agent, waterproofing agent 6
Part), 55 parts of water；The specific raw material of this comparative example is shown in Table 1, and the specific raw material of this comparative example is shown in Table 1, the construction party of normal concrete
Method is consistent with the construction method of embodiment 1.
Comparative example 3
A kind of normal concrete, raw material include the ingredient of following parts by weight: 110 parts of cement, 320 parts of coarse aggregate, thin bone
Material 250 parts, 60 parts of flyash, 30 parts of additive (6 parts of air entraining agent, 6 parts of impervious fiber, 6 parts of swelling agent, 6 parts of water-reducing agent, waterproof
6 parts of agent), 60 parts of water；The specific raw material of this comparative example is shown in Table 1, the construction method of the construction method and embodiment 1 of normal concrete
Unanimously.
The raw material of normal concrete prepared by water-tight concrete and comparative example 1~3 prepared by the embodiment of the present invention 1 is constituted such as
Shown in table 1:
1. concrete material of table is constituted
The roof structure of the normal concrete prepared by comparative example 1~3 of the present invention according to the relevant criterion of GB-50164 into
The waterproof performances acceptance of row 28D, the results showed that, normal concrete roof structure as a comparison prepared by the present invention it is impervious
Performance has respectively reached P6, P4, P4 grade, although having certain waterproof performance, prepared by comparative example 1~3 of the present invention
The roof structure of normal concrete is easier erosion by summer in winter hot and cold alternation and long-term sunshine wind and rain, so as to cause open
It splits, anti-permeability performance is caused sharply to decline.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of water-tight concrete, which is characterized in that the construction raw material of the water-tight concrete includes the ingredient of following parts by weight:
90~110 parts of cement, 300~360 parts of coarse aggregate, 230~270 parts of fine aggregate, 50~80 parts of flyash, additive 20~40
Part, 50~60 parts of water；
It include air entraining agent, impervious fiber, swelling agent, water-reducing agent, waterproofing agent in the additive；
Total alkali content < 2.25kg/m of the water-tight concrete3。
2. water-tight concrete according to claim 1, which is characterized in that the cement is ordinary portland cement, described
Ordinary portland cement is non-early-strength, the compression strength > 32.5MPa of seven days aquation heating index < 275kJ/kg, 28d.
3. water-tight concrete according to claim 1, which is characterized in that the coarse aggregate uses partial size for 5~31.5mm
Machine macadam gradating obtain, clay content < 1% of the machine rubble.
4. water-tight concrete according to claim 1, which is characterized in that the fine aggregate use fineness modulus for 2.5~
3.0 medium coarse sand, clay content < 3% of the medium coarse sand.
5. water-tight concrete according to claim 1, which is characterized in that the air entraining agent is rosin or rosin polycondensate.
6. water-tight concrete according to claim 1, which is characterized in that the impervious fiber is polypropylene fibre.
7. water-tight concrete according to claim 1, which is characterized in that the swelling agent is the soil expansion of UEA complex coagulation
Agent.
8. water-tight concrete according to claim 1, which is characterized in that the water-reducing agent is polycarboxylate dehydragent.
9. water-tight concrete according to claim 1, which is characterized in that the waterproofing agent is aluminum sulfate.
10. the construction method of water-tight concrete described in claim 1~9 any one, which comprises the steps of:
(1) cement, coarse aggregate, fine aggregate, flyash are stirred evenly, obtains just mixing；
(2) to it is described be just added in mixing air entraining agent, impervious fiber, swelling agent, water-reducing agent, waterproofing agent be uniformly mixing to obtain it is impervious
Concrete；
(3) water-tight concrete is poured into the roof with bar construction, large-area backplane and top plate grouping pour, pool wall layering
Continuous placing；
(4) it carries out machinery after the completion of pouring to vibrate, in preformed hole, built-in pipe, built-in fitting and the waterstop that it is inconvenient that machinery vibrates
Junction increase manually plug and pound；
(5) water-tight concrete after vibrating and manually plugging and pounding is conserved.
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