CN102145984A - Self-curing concrete - Google Patents
Self-curing concrete Download PDFInfo
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- CN102145984A CN102145984A CN2010101114162A CN201010111416A CN102145984A CN 102145984 A CN102145984 A CN 102145984A CN 2010101114162 A CN2010101114162 A CN 2010101114162A CN 201010111416 A CN201010111416 A CN 201010111416A CN 102145984 A CN102145984 A CN 102145984A
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Abstract
The invention relates to self-curing concrete capable of preventing moisture from being excessively evapotranspired on the surface of concrete so as to solve the problem that the development of concrete does not meet the requirement due to incomplete cement hydration caused by curing failure in the prior art. A high-performance liquid self-curing agent is added into blended concrete, and the using amount of the high-performance liquid self-curing agent is 0.01 to 10 weight percent of powder in the concrete; and the high-performance liquid self-curing agent can absorb aqueous vapor in the air and release moisture to the concrete, so that after the concrete is poured, the concrete does not need extra moisture or any external curing to fulfill the self-curing aim.
Description
Technical field
The present invention relates to a kind of concrete, particularly relate to a kind of self-maintenance concrete with suction and humidity-holding effect.
Background technology
Concrete condenses under natural climate condition, when hardening, if do not take any maintenance measure, concrete will be owing to the too fast and early stage a large amount of dehydration of moisture evaporation, so that influence the carrying out of hydrated reaction of cement, cause concrete surface phenomenons such as decortication, dusting or generation desciccation crack to occur, concrete intensity and weather resistance will decrease.Therefore, prevent the generation of early stage dehydration of concrete and desciccation crack, should in time carry out maintenance in concrete casting postpone.Existing known concrete is watering the postpone need through suitable outside maintenance work, to sprinkle water at concrete surface or to add the water mode, keep suff water, promptly so-called " wet controlling " (moist curing) method, so that it includes the complete aquation of cement, reach enough ultimate compression strength.Yet the wet method of controlling needs personnel periodically to water, spray or regular outside maintenance such as spraying, and moistening and dry effect repeatedly, can cause that structure is inner to be produced the crack and make works lose globality.
In addition, include cuticula method of curing and waterproof thing covering curing in addition for general concrete known maintenance process at present; And the cuticula maintenance is after newly watering concrete surface spraying one deck liquid film curing agent (claiming membrane curing solution) of putting, curing agent can the fluid-tight sealing rete of very fast formation one deck at concrete surface, stop the moisture evaporation in the concrete, make cement in the concrete obtain a kind of maintenance process of abundant aquation condition, because curing agent viscosity is lower, be easy to build up at the concrete surface pocket, film can lower skin friction coefficient and poor effect; Waterproof thing covering curing is only applicable to the big area works of simple shape.Though both at home and abroad standard all has the regulation to " suitably maintenance ", correlative study shows, on practice of construction, even the most basic curing requirements also can be left in the basket sometimes and is difficult to reach, and more even fully not in addition maintenance.
The Chinese invention patent application of a case application number 200610080647.5 " self-maintenance concrete " has been proposed before the applicant, it is added on the high-effect powder of preserving moisture in the mix in the concrete, consumption accounts for cement consumption 0.5-5wt% (weight percent) in the concrete, make concrete not need the extra moisture or the maintenance of any outside watering postpone, reach purpose, but necessity of further lifting is arranged for uniform mixing degree, weight loss and strength development etc. from maintenance.
This shows that above-mentioned available coagulation soil obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of novel self-maintenance concrete, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Because the defective that above-mentioned available coagulation soil exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and expertise, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of novel self-maintenance concrete, can improve general available coagulation soil, make it have more practicality.Through constantly research, design, and, create the present invention who has practical value finally through after studying sample and improvement repeatedly.
Summary of the invention
Main purpose of the present invention is, overcomes the defective that available coagulation soil exists, and a kind of novel self-maintenance concrete is provided, and technical problem to be solved is to make it promptly not need the maintenance of any outside just can reach effect from maintenance watering postpone; Do not need additionally to provide concrete moisture, just can reduce moisture after the concrete form removal evaporation, improve extent of hydration, reduce the contraction that moisture evaporation caused and increase ultimate compression strength, reaching concrete casting postpone does not promptly need the maintenance work of any outside, is very suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of self-maintenance concrete according to the present invention's proposition, it is characterized in that it adds the liquid autogenous curing agent of high-performance in concrete mixing, the liquid autogenous curing agent of this high-performance has in the atmosphere of absorption moisture and discharges moisture gives concrete function, make concrete promptly not need the maintenance of any outside just can reach effect watering postpone from maintenance, and between the 0.01-10wt% of consumption powder in this concrete of the liquid autogenous curing agent of the high-performance of being added, so that the ultimate compression strength of this self-maintenance concrete promotes more than 10% at least compared to the ultimate compression strength of no curing concrete.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid self-maintenance concrete, the 1-3wt% of consumption powder in this concrete of the liquid autogenous curing agent of wherein said high-performance.
Aforesaid self-maintenance concrete, the water-cement ratio of wherein said self-maintenance concrete is between 0.20 to 0.80.
Aforesaid self-maintenance concrete, the water-cement ratio of wherein said self-maintenance concrete are 0.3.
Aforesaid self-maintenance concrete, the liquid autogenous curing agent of this high-performance of wherein being added is a polyalcohols.
Aforesaid self-maintenance concrete, the liquid autogenous curing agent of wherein said high-performance is selected from polyoxyethylene glycol (polyethylene glycol, PEG), polyhexene alcohol (Polyvinyl Alcohol, PVA), ethylene glycol (Ethylene glycol, EG), propylene glycol (propylene glycol, PG), dipropylene glycol (dipropylene glycol, DPG), butyleneglycol (butylene glycol), 1,3 butyleneglycols (1,3-butylene glycol), 1,4 butyleneglycols (1,4-butylene glycol), neopentyl glycol (neopently glycol, NPG), Xylitol (xylitol), sorbyl alcohol (sorbitol), glycerine (glycerine), plant sterol (phytosterols) and function class thereof like material and one of them of its derivative, perhaps be the combination that comprises the above different ratios of above-mentioned at least two materials (containing).
Aforesaid self-maintenance concrete, the liquid autogenous curing agent of this high-performance of wherein being added is selected from Hyaluronic Acid (hyaluronic acid), polyoxy ethane (polyxyethylene, POE), pyrrole Lu alkane keto-earboxylic acid sodium (sodium pyrrolidone carboxylate, PCA-Na), Sodium.alpha.-hydroxypropionate (Sodiumlactate), stearyl alcohol (stearyl alcohol), hexadecanol (cetyl alcohol), sodium hydroxyl skin junket alkane ketone (Sodium PCA), always poly-Vetsin and the super glue of preserving moisture of 3D (sodium type) (Swollen γ-PGA; 3D Hydrogels (Na
+Form)), shark alkene (Squalane), shark shark alkane, lotus lotus flower oil, tallow acid amides (PEG-50), Collagen Hydrolysate (Hydrolyzed Collagen), chitin derivativ (Chitosan), aloe (Aloe Vera), Seaweed Extract, Amino acid (Amino acid), Panthenol (Panthenol), urea (urea), tartaric acid (α-hydroxy acid), lactic acid (LacticAcid) and function class thereof like material and one of them of its derivative, perhaps be the combination that comprises the above different ratios of above-mentioned at least two materials (containing).。
Aforesaid self-maintenance concrete, wherein this concrete has from filling concrete (Self-Compacting Concrete, proportioning SCC).
Aforesaid self-maintenance concrete, wherein this concrete has conventional concrete (OrdinaryPortland Concrete, proportioning OPC).
Aforesaid self-maintenance concrete, wherein said powder include the inert material of cement and the glued character of tool not.
Aforesaid self-maintenance concrete, the inert material of the glued character of wherein said not tool be selected from limestone powder, converter stove quarrel powder, air cooling State of Blast Furnace quarrel powder, olive stone flour, ground dolomite, pyroxene powder, hornblende powder, calcite in powder, plagioclase powder, silica powder, potash feldspar powder and function class thereof like material and one of them of its derivative, perhaps be the combination that comprises the above different ratios of above-mentioned at least two materials (containing).。
Aforesaid self-maintenance concrete, wherein said powder more include pozolana material (Pozzolans).
Aforesaid self-maintenance concrete, wherein said pozolana material is selected from hearthstone powder (groundgranulated blast-furnace slag, GGBFS), silicon ash (silica fume), flying dust (flyash), rice hull ash (rice husk ash), zeolite powder (zeolite powder) and function class thereof like material and one of them of its derivative, perhaps be the combination that comprises the above different ratios of above-mentioned at least two materials (containing).The present invention compared with prior art has tangible advantage and beneficial effect.As known from the above, for achieving the above object, the invention provides a kind of self-maintenance concrete, utilize the liquid autogenous curing agent of high-performance to be added into mix in the concrete, the liquid autogenous curing agent of this high-performance has the atmosphere of absorption aqueous vapor and discharges gives concrete function, makes concrete promptly not need the maintenance of any outside just can reach effect from maintenance watering postpone.After the simple construction of putting through concrete casting, do not need additionally to provide concrete moisture, just can reduce moisture after the concrete form removal evaporation, improve extent of hydration, reduce the contraction that moisture evaporation caused and increase ultimate compression strength.Optimal situation is to reach the maintenance work that concrete casting postpone does not promptly need any outside.
According to self-maintenance concrete of the present invention, it adds the liquid autogenous curing agent of high-performance in concrete mixing, the liquid autogenous curing agent of this high-performance has the moisture of release and gives concrete function, makes concrete promptly not need the maintenance of any outside just can reach effect from maintenance watering postpone.The liquid autogenous curing agent of the high-performance of being added has a specific consumption, for example accounts for the 0.01-10wt% of powder in this concrete, so that the ultimate compression strength of this self-maintenance concrete promotes more than 10% at least compared to the ultimate compression strength of no curing concrete.In one embodiment, the 1-3wt% of consumption cement proportion in this concrete of the liquid autogenous curing agent of this high-performance.Use, economic, curing concrete, and easy form of construction work effectively reaches the requirement of construction QC and working design standard.Wherein " wt% " abbreviation of being weight percentage.
By technique scheme, self-maintenance concrete of the present invention has following advantage and beneficial effect at least: self-maintenance concrete of the present invention does not promptly need the maintenance of any outside just can reach effect from maintenance watering postpone; Do not need additionally to provide concrete moisture, just can reduce moisture after the concrete form removal evaporation, improve extent of hydration, reduce the contraction that moisture evaporation caused and increase ultimate compression strength, reaching concrete casting postpone does not promptly need the maintenance work of any outside, is very suitable for practicality.
In sum, the invention relates to a kind of self-maintenance concrete, can avoid moisture to evapotranspire by the concrete surface over-drastic.Existing known in order to solve because of the maintenance failure makes hydrated cementitious incomplete, cause the inept problem of concrete development.The present invention is added on the liquid autogenous curing agent of high-performance in the mix in the concrete, its consumption accounts for the 0.01-10wt% of powder in the concrete, the liquid autogenous curing agent of this high-performance can absorb water in air gas and discharge moisture gives concrete function, make concrete not need the extra moisture or the maintenance of any outside watering postpone, reach purpose from maintenance.The present invention has significantly great progress technically, and has tangible positively effect, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technique means of the present invention, and can be implemented according to the content of specification sheets, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 be the present invention's one specific embodiment a kind of self-maintenance concrete apply schema.
Fig. 2 is that the interior moisture of the concrete of the present invention's one specific embodiment outwards moves the synoptic diagram that scatters and disappears.
Fig. 3 is the interior microtexture synoptic diagram of the concrete of the present invention's one specific embodiment.
1: concrete mixing
2: add the liquid autogenous curing agent of high-performance in the concrete mixing
3: concrete casting is put
4: whether observation reaches from the maintenance effect
5: middle water
6: pore water
7: planar water
8: the microporosity
9: macrovoid
10: pore
11: micropore humidity travel direction
12: macrovoid humidity travel direction
Embodiment
Reach technique means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of self-maintenance concrete, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can clearly present in the following detailed description that cooperates with reference to graphic preferred embodiment.For convenience of description, in following embodiment, components identical is represented with identical numbering.
Below will cooperate appended diagram to describe embodiments of the invention in detail, so it should be noted, those diagrams are the synoptic diagram of simplification, only basic framework of the present invention or implementation method are described with illustrative method, so only show element and the syntagmatic relevant with this case, shown element is not that number, shape, the size implemented with reality are done equal proportion and drawn among the figure, and some dimension scale and other relative dimensions ratios or exaggerated or simplify processing are to provide clearer description.Actual number, shape and the dimension scale of implementing is a kind of design of putting property of choosing, and detailed component placement may be more complicated.
According to a specific embodiment of the present invention, what a kind of self-maintenance concrete was illustrated in Fig. 1 mainly applies schema.This self-maintenance concrete adds the liquid autogenous curing agent of high-performance in concrete mixing, the liquid autogenous curing agent of this high-performance has in the atmosphere of absorption moisture and discharges moisture gives concrete function, makes concrete promptly not need the maintenance of any outside just can reach effect from maintenance watering postpone.Wherein, so-called " high-performance " is defined as and can makes the ultimate compression strength of self-maintenance concrete promote more than 10% at least compared to the ultimate compression strength of no curing concrete.
For making concrete maintenance more convenient, effective, utilization of the present invention has preserves moisture and the liquid autogenous curing agent of the high-performance of water absorption character is added on concrete in the mix, and between the 0.01-10wt% of consumption powder in this concrete of the liquid autogenous curing agent of the high-performance of being added, so that the ultimate compression strength of this self-maintenance concrete promotes more than 10% compared to the ultimate compression strength of no curing concrete at least, and weight loss reduces more than 10%, makes concrete can reach the purpose of " from maintenance (Self-Curing) " watering postpone.So-called " self-maintenance concrete " do not need to refer to manually additionally provide concrete moisture, even can not need the maintenance of any outside fully watering postpone, just can reach the purpose of self-maintenance.
As shown in Figure 1, the flow process that mainly applies of self-maintenance concrete of the present invention includes: the step 2 of the step 1 of " concrete mixing ", " adding the liquid autogenous curing agent of high-performance in the concrete mixing ", the step 3 of " concrete casting is put " and the step 4 of " observe and whether reach from the maintenance effect ".
At first, in step 1, select various arbitrarily concrete proportioning for use, it can comprise the coarse aggregate of suitable proportion, fine aggregate, cement (cement), pozolana material (Pozzolans), inert material, mould agent and mixing water or the like (mentioned " powder " in literary composition back promptly mainly comprise the inert material of cement and tool gluing character not etc. mix it) by force according to different ratios, conventional concrete (Ordinary PortlandConcrete for example, OPC), from the filling concrete (Self-Compacting Concrete, SCC), high performance concrete, eugenic concrete, light weight concrete or heavy concrete or the like.Specifically, this not the inert material of the glued character of tool can be selected from limestone powder, converter stove quarrel powder, air cooling State of Blast Furnace quarrel powder, olive stone flour, ground dolomite, pyroxene powder, hornblende powder, calcite in powder, plagioclase powder, silica powder, potash feldspar powder, silica flour and function class thereof like material and one of them of its derivative, perhaps be the combination that comprises the above different ratios of above-mentioned at least two kinds of materials (containing).In the present embodiment, this powder can more include the pozolana material.Particularly, this pozolana material can be selected from hearthstone powder (groundgranulated blast-furnace slag, GGBFS), silicon ash (silica fume), flying dust (flyash), rice hull ash (rice husk ash), zeolite powder (zeolite powder) and function class thereof like material and one of them of its derivative, perhaps be the combination that comprises the above different ratios of above-mentioned at least two kinds of materials (containing).
Afterwards, in step 2, add the liquid autogenous curing agent of high-performance concrete in mix, the liquid autogenous curing agent of this high-performance has the atmosphere aqueous vapor of absorption and discharges moisture gives concrete function.In one embodiment, the addition of the liquid autogenous curing agent of this high-performance can account for the 1-3wt% of powder in this concrete.The powder consumption is preferable in this concrete so the addition of the liquid autogenous curing agent of this high-performance should be proportional to, and the purity of the liquid autogenous curing agent of this high-performance should be more than 99%.Particularly, the liquid autogenous curing agent of this high-performance is a polyalcohols, be selected from polyoxyethylene glycol (polyethylene glycol, PEG), polyhexene alcohol (Polyvinyl Alcohol, PVA), ethylene glycol (Ethylene glycol, EG), propylene glycol (propylene glycol, PG), dipropylene glycol (dipropylene glycol, DPG), 1,3 butyleneglycols (1,3-butylene glycol), 1,4 butyleneglycols (1,4-butylene glycol), neopentyl glycol (neopently glycol, NPG), Xylitol (xylitol), sorbyl alcohol (sorbitol), glycerine (glycerine), plant sterol (phytosterols) and function class thereof like material and one of them of its derivative, perhaps be the combination that comprises the above different ratios of above-mentioned at least two materials (containing).
In another preferred embodiment, the liquid autogenous curing agent of this high-performance also can be selected from Hyaluronic Acid (hyaluronic acid), polyoxy ethane (polyxyethylene, POE), pyrrole Lu alkane keto-earboxylic acid sodium (sodium pyrrolidone carboxylate, PCA-Na), Sodium.alpha.-hydroxypropionate (Sodium lactate), stearyl alcohol (stearyl alcohol), hexadecanol (cetyl alcohol), sodium hydroxyl skin junket alkane ketone (SodiumPCA), always poly-Vetsin and the super glue of preserving moisture of 3D (sodium type) (Swollen γ-PGA; 3DHydrogels (Na
+Form)), shark alkene (Squalane), shark shark alkane, lotus lotus flower oil, tallow acid amides (PEG-50), Collagen Hydrolysate (Hydrolyzed Collagen), chitin derivativ (Chitosan), aloe (Aloe Vera), Seaweed Extract, Amino acid (Amino acid), Panthenol (Panthenol), urea (urea), tartaric acid, lactic acid (Lactic Acid) and function class thereof like material and one of them of its derivative, perhaps be the combination that comprises the above different ratios of above-mentioned at least two kinds of materials (containing).Wherein, for example the composition of urea (urea), tartaric acid, this class of lactic acid (Lactic Acid) has good water conservation effect when lower concentration.Preferably, the liquid autogenous curing agent of this high-performance can have the powerful characteristic that absorbs the atmosphere aqueous vapor, and can provide concrete pouring required moisture.
In a specific embodiment of the present invention, in the atmospheric environment of atmospheric moisture (RH) 50%, no matter this self-maintenance concrete is the liquid autogenous curing agent of high-performance of interpolation 1% or 3%, all can reach and reduce the concrete moisture loss to reach the effect from maintenance.Show to table four by table one, different concrete proportionings, the liquid autogenous curing agent of high-performance all can reduce the concrete moisture loss to reach the effect from maintenance.Alleged " blank group " refers to not have the concrete of maintenance in wherein showing, and alleged " w/b " writes a Chinese character in simplified form for the English of water-cement ratio (water-cementitious materials ratio).Wherein, water-cement ratio refers to the ratio of coagulation water in soil and consolidating material, and consolidating material can comprise cement, pozolana material etc., is generally powder in the concrete and deducts the not residue content of the inert material of the glued character of tool.
The moisture weight loss of table one: w/b=0.42
*Moisture weight loss refers to (initial concrete heavy-certain age concrete is heavy)/initial heavy * 100% of concrete
﹠amp;Blank group and the concrete examination body that adds the liquid autogenous curing agent of high-performance, its maintenance environment is a relative humidity 50%
The moisture weight loss of table two: w/b=0.36
*Moisture weight loss refers to (initial concrete heavy-certain age concrete is heavy)/initial heavy * 100% of concrete
﹠amp;Blank group and the concrete examination body that adds the liquid autogenous curing agent of high-performance, its maintenance environment is a relative humidity 50%
The moisture weight loss of table three: w/b=0.3
*Moisture weight loss refers to (initial concrete heavy-certain age concrete is heavy)/initial heavy * 100% of concrete
﹠amp;Blank group and the concrete examination body that adds the liquid autogenous curing agent of high-performance, its maintenance environment is a relative humidity 50%
The moisture weight loss of table four: w/b=0.24
*Moisture weight loss refers to (initial concrete heavy-certain age concrete is heavy)/initial heavy * 100% of concrete
﹠amp;Blank group and the concrete examination body that adds the liquid autogenous curing agent of high-performance, its maintenance environment is a relative humidity 50%
In addition, table five to table eight is represented different concrete proportionings respectively, the concrete of self-maintenance concrete of the present invention, the blank group of existing known no maintenance and the existing known wet comparison diagram of the concrete of maintenance in ultimate compression strength of controlling.The present invention is added with the self-maintenance concrete of the liquid autogenous curing agent of 1% and 3% high-performance, and its ultimate compression strength is all greater than the concrete of no maintenance, and approaching with the wet concrete strength of controlling maintenance, part proportioning even surmount to wet and control the concrete crushing strength of maintenance.So can inference, the liquid autogenous curing agent of this high-performance easily has " extractings " absorption atmosphere aqueous vapor and discharges moisture gives concrete, makes self-maintenance concrete proportioning of the present invention have the effect of preferable ultimate compression strength.
Self-maintenance concrete of the present invention, all can be greater than 28 days ultimate compression strength of no curing concrete, especially add the self-maintenance concrete of the liquid autogenous curing agent of 3% high-performance, even can more than 10%, be respectively 416.3 to 365.6 greater than 28 days ultimate compression strength of no curing concrete; 415.4 than 356.7; 668.8 than 516.6; 776.1 than 663.1, its unit is kgf/cm
2Along with the raising of concrete strength specification, the ultimate compression strength of self-maintenance concrete of the present invention has tangible more lifting, part even can be higher than the concrete of controlling maintenance through wet.Therefore, the effect that self-maintenance concrete of the present invention increases ultimate compression strength is outstanding obvious, compared with controlling the concrete of maintenance even have stronger ultimate compression strength through wet, represent that self-maintenance concrete of the present invention not only no longer needs long-time artificial wet to control maintenance, more can save cost of labor and ultimate compression strength is better.
Ultimate compression strength (the kgf/cm of table five: w/b=0.42
2)
﹠amp;Blank group and the concrete examination body that adds the liquid autogenous curing agent of high-performance, its maintenance environment is a relative humidity 50%
Ultimate compression strength (the kgf/cm of table six: w/b=0.36
2)
﹠amp;Blank group and the concrete examination body that adds the liquid autogenous curing agent of high-performance, its maintenance environment is a relative humidity 50%
Ultimate compression strength (the kgf/cm of table seven: w/b=0.3
2)
﹠amp;Blank group and the concrete examination body that adds the liquid autogenous curing agent of high-performance, its maintenance environment is a relative humidity 50%
Ultimate compression strength (the kgf/cm of table eight: w/b=0.24
2)
﹠amp;Blank group and the concrete examination body that adds the liquid autogenous curing agent of high-performance, its maintenance environment is a relative humidity 50%
By last tabulation five to table eight as seen, water-cement ratio (w/b) was at 0.36 o'clock, the 3wt% that the addition of the liquid autogenous curing agent of high-performance accounts for powder in the concrete is equivalent to wet concrete 28 days intensity controlling maintenance 28 days intensity, then can surpass the wet concrete of controlling maintenance 56 days intensity; Again, water-cement ratio (w/b) was at 0.24 o'clock, and the 1wt% that the addition of the liquid autogenous curing agent of high-performance accounts for powder in the concrete all can surpass the wet concrete of maintenance of controlling 28 days and 56 days intensity at 28 days with 56 days intensity.Therefore, when the addition of the liquid autogenous curing agent of high-performance accounted for the 1-3wt% of powder in the concrete, the control water-cement ratio can have preferable intensity performance at 28 days with 56 days 0.24 to 0.36.Best, water-cement ratio (w/b) was at 0.3 o'clock, the addition of the liquid autogenous curing agent of high-performance accounts for the 1wt% and the 3wt% of powder in the concrete, all can surpass the wet concrete that control maintenance at 7 days, 28 days with 56 days intensity, promptly to cooperate water-cement ratio (w/b) be that 0.3 situation is a best kenel of the present invention to the addition of the liquid autogenous curing agent of the high-performance 1wt% to 3wt% that accounts for powder in the concrete.
In addition, because of inert material does not have glued character and is contained in the powder, when powder consumption fixedly the time, can increase and decrease the consumption of gelling material such as cement, pozolana material in the mode of the usage quantity of adjusting inert material, reach and do not change the effect that concrete proportioning is adjusted water-cement ratio.
Therefore, the liquid autogenous curing agent of high-performance of adding in the step of concrete mixing owing to the present invention has the atmosphere aqueous vapor of absorption and discharges the concrete function of water molecules.Therefore, have the characteristic of minimizing, and can solve concrete works causes be full of cracks because of moisture loss phenomenon for concrete shrinkage.By table nine to table ten two as can be known, its shrinkage of self-maintenance concrete of adding the liquid autogenous curing agent of high-performance is littler than the concrete of no maintenance, and near control the concrete of maintenance through wetting, represent that self-maintenance concrete of the present invention can grasp airborne moisture effectively, and be released in the concrete, reduce scattering and disappearing of moisture, thus the contraction of volume can significantly be reduced, to solve the phenomenon of concrete large-area construction be full of cracks.Which kind of concrete proportioning no matter self-maintenance concrete of the present invention be, all can reduce volumetric shrinkage effectively, to reach the effect from maintenance.
The volume shrinkage mass (* 10 of table nine: w/b=0.42
-6)
﹠amp;Blank group and the concrete examination body that adds the liquid autogenous curing agent of high-performance, its maintenance environment is a relative humidity 50%
The volume shrinkage mass (* 10 of table ten: w/b=0.36
-6)
﹠amp;Blank group and the concrete examination body that adds the liquid autogenous curing agent of high-performance, its maintenance environment is a relative humidity 50%
The volume shrinkage mass (* 10 of table ten one: w/b=0.3
-6)
﹠amp;Blank group and the concrete examination body that adds the liquid autogenous curing agent of high-performance, its maintenance environment is a relative humidity 50%
The volume shrinkage mass (* 10 of table ten two: w/b=0.24
-6)
﹠amp;Blank group and the concrete examination body that adds the liquid autogenous curing agent of high-performance, its maintenance environment is a relative humidity 50%
In addition, the detailed comparison of " self-maintenance concrete " of the present invention and application number 200610080647.5 is described as follows shown in the table ten three:
Table ten three: liquid autogenous curing agent of high-performance of the present invention and application number
200610080647.5 the deck watch of the high-effect powder of preserving moisture
| Item compared | The high-effect powder of preserving moisture | The liquid autogenous curing agent of high-performance |
| 1. material category | Polyacrylic acid, polyoxyethylene glycol, absorbing water powder, Sodium.alpha.-hydroxypropionate+PG (or add again+DPG or+ethylene glycol+glycerol+butyleneglycol), ethylene glycol+PEG+PG+ glycerol (or DPG), butyleneglycol+PEG+DPG or butyleneglycol+glycerol | Polyalcohols and Hyaluronic Acid, polyoxy ethane, pyrrole Lu alkane keto-earboxylic acid, Sodium.alpha.-hydroxypropionate, stearyl alcohol, hexadecanol and derivative thereof wherein one, comprise of the mixing of above-mentioned material according to |
| 2. usage quantity | The 0.5-5wt% of cement amount | The 0.01-10wt% of powder amount |
| 3. whether material which can retain moisture is water-soluble | Not | Be |
| 4. absorb water in air gas and discharge moisture and give concrete function | Be (physical property) | Be (physical property and chemical) |
| 5. change the force of cohesion and the surface tension of the water in the concrete pore | Do not have | Moisturize sub-force of cohesion and surface tension can reduce the speed that water molecules evapotranspires |
| 6. concrete strength promotes | Be | |
| 7. reducing volume of concrete shrinks | Undeclared | Reduce volumetric shrinkage (reducing be full of cracks) effectively |
| 8. concrete material is formed | Coarse Aggregate, fine granules, cement, pozolana material, mould agent and mixing water by force | Coarse Aggregate, fine granules, cement, pozolana material, Inert material, mould agent and mixing water by force |
See also shown in Figure 2, usually after the step of concrete mixing, the moisture of inside concrete can outwards move gradually and scatter and disappear, and concrete desiccation is when continuing to carry out, make the planar water 7 that is present between the interior colloid of concrete be discharged from middle water 5, cause moving mutually between colloid, and make concrete produce shrinkage strain.Generally speaking, so-called " planar water " refers to be present between concrete than the moisture in the macrovoid, is attached to hole wall with adsorptive power.And so-called " middle water " refers to be present in the moisture in the micro-pore, and wherein the loss of middle water tends to cause the change of colloid size.6 in pore water is the moisture that is present in the concrete pore.
Please consult shown in Figure 3ly again, this figure is a microtexture synoptic diagram in the concrete.According to international pure chemistry and (the Internation Union of Pure and Applied Chemistry of applied chemistry alliance, IUPAC) system is divided into macrovoid, microporosity etc. with the concrete inner pore according to pore size, in Fig. 3, macrovoid 9 is meant the aperture between the 25-5000 hole between the rice (nm) how, and microporosity 8 is meant that the aperture is less than 1.25 holes of rice (nm) how.In addition, not by cement or the shared space of hydrated product, promptly be called pore 10 in concrete, and pore 10 is communicated with macrovoid 9 and microporosity 8 in the concrete, its size and volume then depend on water-cement ratio and extent of hydration.As shown in Figure 3, the moisture in the microporosity 8 moves in the macrovoid 9 along micropore humidity travel direction 11, and the moisture in the macrovoid 9 moves in another macrovoid 9 along macrovoid humidity travel direction 12.Owing to added the liquid autogenous curing agent of high-performance of the present invention in the concrete, the force of cohesion and the surface tension of son so can moisturize, can maintain moisture at pore 10 especially, can slow down in the micropore humidity travel direction 11 and the water flow speed of macrovoid humidity travel direction 12, so can reduce the evapotranspiration rate of the moisture in the concrete.Therefore, can reduce the above-mentioned planar water and the loss of middle water significantly, reducing volumetric shrinkage effectively, and reduce the situation of concrete cracking.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (13)
1. self-maintenance concrete, it is characterized in that it adds the liquid autogenous curing agent of high-performance in concrete mixing, the liquid autogenous curing agent of this high-performance has the moisture of release and gives concrete function, make concrete promptly not need the maintenance of any outside just can reach effect watering postpone from maintenance, and between the 0.01-10wt% of consumption powder in this concrete of the liquid autogenous curing agent of the high-performance of being added, so that the ultimate compression strength of this self-maintenance concrete promotes more than 10% at least compared to the ultimate compression strength of no curing concrete.
2. self-maintenance concrete according to claim 1 is characterized in that the 1-3wt% of consumption powder in this concrete of the liquid autogenous curing agent of wherein said high-performance.
3. self-maintenance concrete according to claim 2, the water-cement ratio that it is characterized in that wherein said self-maintenance concrete is between 0.20 to 0.80.
4. self-maintenance concrete according to claim 2, the water-cement ratio that it is characterized in that wherein said self-maintenance concrete is 0.3.
5. self-maintenance concrete according to claim 1, the liquid autogenous curing agent of this high-performance that it is characterized in that wherein being added is a polyalcohols.
6. self-maintenance concrete according to claim 5, it is characterized in that the liquid autogenous curing agent of wherein said high-performance is selected from polyoxyethylene glycol, polyhexene alcohol, ethylene glycol, propylene glycol, dipropylene glycol, butyleneglycol, 1,3 butyleneglycols, 1, one of them of 4 butyleneglycols, neopentyl glycol, Xylitol, sorbyl alcohol, glycerine, plant sterol and function like derivatives thereof perhaps is the combination of above-mentioned at least two materials.
7. self-maintenance concrete according to claim 1, the liquid autogenous curing agent of this high-performance that it is characterized in that wherein being added is selected from Hyaluronic Acid, polyoxy ethane, pyrrole Lu alkane keto-earboxylic acid sodium, Sodium.alpha.-hydroxypropionate, stearyl alcohol, hexadecanol, sodium hydroxyl skin junket alkane ketone, total poly-Vetsin and the super glue of preserving moisture of 3D (sodium type), shark alkene, shark shark alkane, lotus lotus flower oil, the tallow acid amides, Collagen Hydrolysate, chitin derivativ, aloe, Seaweed Extract, Amino acid, Panthenol, urea, tartaric acid, one of them of lactic acid and functionally similar material and its derivative is perhaps for comprising the combination of the above different ratios of above-mentioned at least two materials (containing).
8. self-maintenance concrete according to claim 1 is characterized in that wherein this concrete has from the concrete proportioning of filling.
9. self-maintenance concrete according to claim 1 is characterized in that this concrete wherein has the proportioning of conventional concrete.
10. self-maintenance concrete according to claim 1 is characterized in that wherein said powder includes the inert material of cement and the glued character of tool not.
11. self-maintenance concrete according to claim 10, the inert material that it is characterized in that the glued character of wherein said not tool is selected from limestone powder, converter stove quarrel powder, air cooling State of Blast Furnace quarrel powder, olive stone flour, ground dolomite, pyroxene powder, hornblende powder, calcite in powder, oblique one of them of long powder, silica powder, potash feldspar powder, silica flour and functionally similar material and its derivative, perhaps is the combination that comprises the above different ratios of above-mentioned at least two materials (containing).
12. self-maintenance concrete according to claim 10 is characterized in that wherein said powder more includes the pozolana material.
13. self-maintenance concrete according to claim 12, it is characterized in that wherein said pozolana material is selected from one of them of hearthstone powder, silicon ash, flying dust, rice hull ash and functionally similar material and its derivative, perhaps for comprising the combination of the above different ratios of above-mentioned at least two materials (containing).
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| CN105646767A (en) * | 2015-12-31 | 2016-06-08 | 交通运输部公路科学研究所 | Super-absorbent-resin-type self-maintenance material for concrete and preparation method |
| CN108424173A (en) * | 2018-04-25 | 2018-08-21 | 常州五荣化工有限公司 | A kind of outer curing agent of concrete |
| CN108424080A (en) * | 2018-04-17 | 2018-08-21 | 合肥金同维低温科技有限公司 | A kind of thermal insulation mortar and preparation method thereof with sound insulation function |
| CN109553375A (en) * | 2018-12-29 | 2019-04-02 | 上海练定混凝土制品有限公司 | A kind of retarded concrete and its preparation process |
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| CN105646767A (en) * | 2015-12-31 | 2016-06-08 | 交通运输部公路科学研究所 | Super-absorbent-resin-type self-maintenance material for concrete and preparation method |
| CN105646767B (en) * | 2015-12-31 | 2018-02-09 | 交通运输部公路科学研究所 | A kind of concrete super absorbent resin epoxy-type Self-curing material and preparation method |
| CN108424080A (en) * | 2018-04-17 | 2018-08-21 | 合肥金同维低温科技有限公司 | A kind of thermal insulation mortar and preparation method thereof with sound insulation function |
| CN108424173A (en) * | 2018-04-25 | 2018-08-21 | 常州五荣化工有限公司 | A kind of outer curing agent of concrete |
| CN108424173B (en) * | 2018-04-25 | 2021-06-22 | 浙江研翔新材料有限公司 | Concrete external curing agent |
| CN110845173A (en) * | 2018-08-21 | 2020-02-28 | 江苏省建工建材质量检测中心有限公司 | Method for accelerating static maintenance of concrete product |
| CN109553375A (en) * | 2018-12-29 | 2019-04-02 | 上海练定混凝土制品有限公司 | A kind of retarded concrete and its preparation process |
| CN110451868A (en) * | 2019-08-23 | 2019-11-15 | 海南电网有限责任公司电力科学研究院 | A kind of environmentally friendly electric landscape pole and preparation method thereof |
| CN110451868B (en) * | 2019-08-23 | 2021-08-27 | 海南电网有限责任公司电力科学研究院 | Environment-friendly landscape electric pole and preparation method thereof |
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