A kind of high stability lightweight aggregate concrete and concrete external wall panelTechnical field
The present invention relates to technical field of buildings more particularly to a kind of high stability lightweight aggregate concretes and concrete exterior wallPlate.
Background technique
Since the weight of common precast concrete external wall panel is excessive, lifting is difficult, installation quality it is difficult to ensure that, especially buildWhen building highly higher, practicability and the safety of building are affected, popularization is limited to.
To solve the above problems, normal concrete can be replaced with lightweight aggregate concrete, wallboard weight can reduce, commonLightweight aggregate concrete itself haves the shortcomings that more:
(1) common lightweight aggregate concrete intensity is lower: since lightweight aggregate water absorption rate is high, the waterdrainage amount in later period is more, so can beThe interface of lightweight aggregate and Behavior of Hardened Cement Paste forms weak link, influences the raising of lightweight aggregate concrete intensity.
(2) lightweight aggregate is easy to float: in lightweight aggregate concrete, since the specific gravity of lightweight aggregate is less than the ratio of cement mortarWeight floats since force unbalance frequently results in lightweight aggregate in entire concrete system, lamination occurs, homogeneity is notIt is good, to make the structure of lightweight aggregate concrete that uneven variation occur, affect the homogeneity of concrete.
Summary of the invention
The purpose of the present invention is to solve assembling type steel structures in the prior art to build mating prefabricated outer wall panel weight mistakeGreatly, installation quality, safety it is difficult to ensure that the problem of, and common light aggregate concrete wall slab lightweight aggregate floats, quality is unevenProblem even, intensity is lower, thus the problem of promoting construction quality, improving speed of application, and a kind of high stability proposed is lightAggregate concrete and concrete external wall panel.
To achieve the goals above, present invention employs following technical solutions:
A kind of high stability lightweight aggregate concrete includes macromolecule thickener, the macromolecule thickener master in raw material componentsIt to be the mixture of high-molecular complex and calcium ions early strength agent.
Preferably, raw material components further include cement, flyash, sand, lightweight aggregate, high efficiency water reducing agent and mixing water.
Preferably, the high efficiency water reducing agent is high-efficiency water-reducing agent of poly-carboxylic acid pulvis.
Preferably, the lightweight aggregate is rubble shape haydites of book structure.
Preferably, the rubble shape haydites of book structure is the high-strength ceramsite of cylindrical compress strength 6.5MPa or more.
Preferably, the raw material presses following weight: 3.3-5 parts of cement, 1-1.2 parts of flyash, sand 7.1-7.82 parts, 4.7-5.06 parts of lightweight aggregate, 0.035-0.056 parts of high efficiency water reducing agent, 1.7-1.8 parts of macromolecule thickener, mixing water0.172-0.243 parts.
Preferably, the raw material presses following weight: 5 parts of cement, 1.07 parts of flyash, 7.1 parts of sand, lightweight aggregate4.7 parts, 0.055 part of high efficiency water reducing agent, 1.7 parts of macromolecule thickener, 0.243 part of mixing water.
A kind of concrete external wall panel is made using the lightweight aggregate concrete.
Compared with prior art, the present invention provides a kind of high stability lightweight aggregate concrete and concrete external wall panel, toolsIt is standby following the utility model has the advantages that
1, the high stability lightweight aggregate concrete is mainly that high-molecular complex and calcium ions are early strong by macromolecule thickenerThe mixture of agent, concrete and the high-molecular complex progress in thickener are composite modified, increase the viscosity of material concrete, preventLightweight aggregate floats, and keeps the homogeneity of concrete mix；A certain amount of macromolecule thickener is added in lightweight aggregate concrete,Macromolecule thickener makes the bend-press ratio of concrete in raised trend, reduces the brittleness of concrete, and flexibility increases, deformabilityIncrease；Macromolecule thickener and Behavior of Hardened Cement Paste all form reticular structure, interlaced, enhance concrete viscosity, improve lightThe use quality of aggregate concrete, good fluidity, workability are good, intensity is high, durability is good, are that excellent prefabricated outer wall panel poursMaterial can be widely applied to various assembled architectures.
2, high stability lightweight aggregate concrete, compared with common lightweight aggregate concrete, in macromolecule thickenerThe mixture of high-molecular complex and calcium ions early strength agent, which has, makes lightweight aggregate concrete stability improve, not isolate and do not secreteWater, mobility improve, stability improves, aggregate is non-rising, without vibration, mechanical property improve, brittleness reduces, durability improves,The advantages such as adhesive property raising.
3, the weight ratio of the early strong ingredient of the high stability lightweight aggregate concrete, high-molecular complex and calcium ions is1.5-2:1；The thixotropy of concrete can be improved, the viscosity of concrete can be increased, to prevent lightweight aggregate from floating, concrete is evenMatter improves the mechanical property and durability of concrete.
4, the high stability lightweight aggregate concrete, high efficiency water reducing agent be high-efficiency water-reducing agent of poly-carboxylic acid pulvis, water-reducing rate 25%,The mixing water amount that concrete can be reduced, increases the mobility of concrete, is conducive to pouring for concrete.
5, the high stability lightweight aggregate concrete, lightweight aggregate are rubble shape haydites of book structure, are cylindrical compress strength 6.5MPa or moreHigh strength lightweight aggregate, can be improved lightweight aggregate concrete compactness, improve the cohesive force between Behavior of Hardened Cement Paste and lightweight aggregate interface, thusImprove lightweight aggregate concrete intensity.
6, the concrete external wall panel is made by the concrete with macromolecule thickener, is effectively improved whole outerThe intensity of wallboard, the wallboard for making lightweight aggregate concrete pour out better meet the special requirement of assembled architecture, especiallyWallboard thickness is smaller, is not easy the case where guaranteeing pouring quality；Compared with normal concrete wallboard, the wallboard of one third can reduceWeight.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
A kind of high stability lightweight aggregate concrete includes macromolecule thickener, macromolecule thickener master in raw material componentsIt to be the mixture of high-molecular complex and calcium ions early strength agent；Its raw material components further includes cement, flyash, sand, lightAggregate, high efficiency water reducing agent and mixing water, raw material press following weight: 5 parts of cement, 1.07 parts of flyash, 7.1 parts of sand,4.7 parts of lightweight aggregate, 0.055 part of high efficiency water reducing agent, 1.7 parts of macromolecule thickener, 0.243 part of mixing water；
It is mainly the mixture of high-molecular complex and calcium ions early strength agent by macromolecule thickener, high-molecular complex canPoly- phthalocyanine complex is selected, concrete and the high-molecular complex progress in thickener are composite modified, increase the viscous of material concreteDegree, prevents lightweight aggregate from floating, keeps the homogeneity of concrete mix；A certain amount of macromolecule is added in lightweight aggregate concreteThickener, macromolecule thickener make the bend-press ratio of concrete in raised trend, reduce the brittleness of concrete, and flexibility increases,Deformability increases；Macromolecule thickener and Behavior of Hardened Cement Paste all form reticular structure, interlaced, increase concrete viscosityBy force, the use quality of lightweight aggregate concrete is improved, good fluidity, workability are good, intensity is high, durability is good, are excellent prefabricatedSide fascia pours material, can be widely applied to various assembled architectures；
Compared with common lightweight aggregate concrete, high-molecular complex and calcium ions early strength agent in macromolecule thickenerMixture have make lightweight aggregate concrete stability improve, do not isolate not bleeding, mobility improve, stability improve, aggregate notThe advantages such as floating, without vibration, mechanical property improve, brittleness reduces, durability improves, adhesive property improves.
The weight ratio of high-molecular complex and the early strong ingredient of calcium ions is 1.5-2:1；The thixotroping of concrete can be improvedProperty, the viscosity of concrete can be increased, to prevent lightweight aggregate from floating, homogeneity of concrete improves the mechanical property of concreteAnd durability.
High efficiency water reducing agent is high-efficiency water-reducing agent of poly-carboxylic acid pulvis；High efficiency water reducing agent is high-efficiency water-reducing agent of poly-carboxylic acid pulvis, is subtractedWater rate 25% can reduce the mixing water amount of concrete, increase the mobility of concrete, be conducive to pouring for concrete.
Lightweight aggregate is rubble shape haydites of book structure, and it is cylindrical compress strength 6.5MPa or more that lightweight aggregate, which is rubble shape haydites of book structure,Lightweight aggregate concrete compactness can be improved in high strength lightweight aggregate, improves the cohesive force between Behavior of Hardened Cement Paste and lightweight aggregate interface, to mentionHigh lightweight aggregate concrete intensity.
A kind of concrete external wall panel is made using lightweight aggregate concrete；By the concrete system for having macromolecule thickener, the intensity of whole Side fascia is effectively improved, the wallboard for making lightweight aggregate concrete pour out better meets assembledThe special requirement of building, especially wallboard thickness are smaller, are not easy the case where guaranteeing pouring quality；With normal concrete wallboard phaseThan can reduce the wallboard weight of one third.
Test uses 100 × 100 × 100mm3 concrete cube test specimen, with the slump, divergence, 28 days cubesCompression strength, 28 day age lightweight aggregate concrete apparent density, 28 days compression strength and lightweight aggregate concrete apparent densityFoundation of the ratio as assay test result, it is final to determine that optimal proportion is as follows:
Table 1: cooperate when corresponding experimental result
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, and it is anyThose familiar with the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its inventsDesign is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.