CN112110686A - LC (liquid Crystal) all-light concrete and preparation method thereof - Google Patents
LC (liquid Crystal) all-light concrete and preparation method thereof Download PDFInfo
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- CN112110686A CN112110686A CN202010920186.8A CN202010920186A CN112110686A CN 112110686 A CN112110686 A CN 112110686A CN 202010920186 A CN202010920186 A CN 202010920186A CN 112110686 A CN112110686 A CN 112110686A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The application discloses LC all-light concrete and a preparation method thereof, belongs to the field of concrete preparation, and has the technical key points that: the LC all-light concrete comprises the following components in parts by weight: light soil ceramsite: 900 portion and 1160 portion; fine sand: 600-780 parts; cement: 310-380 parts; water reducing agent: 8.5-10.2 parts of mineral admixture: 230-285 parts; 135 portions and 165 portions of water. By adopting the scheme, the compressive strength of the finally prepared LC all-light concrete can be effectively improved when the light-weight ceramsite is selected as the concrete aggregate. The light-soil ceramsite is rougher, has larger surface area and stronger water absorption capacity, so that the bonding capacity is stronger when the light-soil ceramsite is combined with cementing materials such as cement, the light-soil ceramsite distributed in the coarse aggregate is stably connected with other light-soil ceramsite around the light-soil ceramsite, the compressive strength of the coarse aggregate after the coarse aggregate is formed into concrete is finally improved, and the LC all-light concrete can resist compression and bear load of a large vehicle when a road trunk road is paved.
Description
Technical Field
The application relates to the technical field of concrete preparation, in particular to LC all-light concrete.
Background
LC full light concrete is also called light aggregate concrete, and the concrete prepared by adopting light coarse aggregate and light fine aggregate is widely applied to industrial and civil buildings and other projects, and can reduce the self weight of the structure; the anti-seismic performance of the structure is improved; the material consumption is saved; the component transportation and hoisting efficiency is improved; reducing foundation load and improving building functions (heat preservation, heat insulation, fire resistance and the like).
However, for the all-light concrete, the thermal insulation performance and the strength of the all-light concrete have a large contradiction, the strength depends on the density of the all-light concrete, the higher the density and the larger the self weight are, the higher the strength is, but the higher the thermal conductivity coefficient is, the higher the density is, the thermal insulation effect of the all-light concrete cannot be guaranteed, and under the problem, the strength of most all-light concrete is lower, and the all-light concrete cannot be effectively used in a building structure needing stronger support, and needs to be further improved.
Disclosure of Invention
In order to realize that the all-light concrete has relatively high strength, the application provides the LC all-light concrete and the preparation method thereof.
The application is realized by the following technical scheme:
in a first aspect, the present application provides an LC all-light concrete, which adopts the following technical scheme:
the LC all-light concrete comprises the following components in parts by weight: light soil ceramsite: 900 portion and 1160 portion; fine sand: 600-780 parts; cement: 310-380 parts; water reducing agent: 8.5-10.2 parts; mineral admixture: 230-285 parts; 135 portions and 165 portions of water.
By adopting the technical scheme and combining performance detection data, the compressive strength of the finally prepared LC all-lightweight concrete can be effectively improved when the lightweight concrete ceramsite is selected as the concrete aggregate. The light-weight ceramsite has a coarser surface area and a stronger water absorption capacity, so that the bonding capacity is stronger when the light-weight ceramsite is combined with cementing materials such as cement, the light-weight ceramsite distributed in the coarse aggregate is stably connected with other light-weight ceramsite around the light-weight ceramsite, the structural strength of the formed concrete is finally improved, and the LC full-light-weight concrete can stably bear the load when the LC full-light-weight concrete is used for building structures.
Further setting the following steps: the light soil ceramsite is honeycomb light soil ceramsite.
By adopting the technical scheme and combining the performance detection data of the embodiment 3 and the embodiment 7, the compressive strength of the finally prepared LC all-light concrete can be effectively improved when the adopted light-weight ceramsite is the honeycomb light-weight ceramsite. The result is that the single particles of the cellular light-weight soil ceramsite have larger surface area and water absorption capacity than the conventional light-weight soil ceramsite, and the pores on the cellular light-weight soil ceramsite are mostly of a triangular structure, so that the cellular light-weight soil ceramsite particles have higher strength, and finally, the concrete obtained after bonding other light-weight soil ceramsite by combining a cementing material has larger compressive strength.
Further setting the following steps: the particle size of the light soil ceramsite is 5-10 mm.
By adopting the technical scheme, the light soil ceramsite with smaller particle size can be used as auxiliary aggregate to be distributed among the light soil ceramsite with larger particle size, so that the compressive strength of the concrete is improved while the cost is controlled.
Further setting the following steps: the light soil ceramsite adopts continuous gradation.
By adopting the technical scheme and combining the performance detection data of the embodiment 3 and the embodiment 8, the compressive strength of the finally prepared LC all-light concrete can be effectively improved when the adopted light-soil ceramsite and the light-soil ceramsite are in continuous grading. The result is that the gaps among the continuously graded aggregate particles are smaller than those among the discontinuously graded aggregate particles, and finally the prepared concrete aggregate particles are relatively tighter, so that the concrete aggregate particles have better connection strength and better pressure resistance.
Further setting the following steps: the mineral admixture comprises the following components in parts by weight: 80-100 parts of fly ash; 110 portions and 130 portions of mineral powder; 40-55 parts of silica fume.
By adopting the technical scheme, the addition of the fly ash can achieve the effect of reducing the cement dosage, the spherical glass body contained in the fly ash can effectively reduce the yield shear stress of the mixture, and further the mixture has larger fluidity, the mineral powder can achieve the effects of reducing the cement dosage and reducing the adiabatic temperature rise, meanwhile, the construction performance of the concrete can be effectively improved, and the later strength of the concrete and the durability of resisting sulfate corrosion, chloride dialysis and the like are improved.
Further setting the following steps: the solid content of the adopted water reducing agent is 20 percent, and the water reducing rate is more than 30 percent.
By adopting the technical scheme, the high-efficiency water reducing agent is selected to further improve the fluidity of the prepared concrete, so that the pumping performance of the concrete in the subsequent working process is ensured.
In a second aspect, the present application provides a method for preparing LC lightweight concrete, which adopts the following technical scheme:
a preparation method of LC all-light concrete comprises the following steps:
s1: putting cement, mineral admixture, light soil ceramsite, water reducer and pervious concrete reinforcing agent into a concrete mixer for stirring to obtain a primary mixed material;
s2: and (4) putting the light soil ceramsite into the primary mixed material obtained in the step S1, and stirring to obtain the LC all-light concrete.
Further setting the following steps: step S1 includes the following steps:
s 1: the cement, the mineral admixture and the light soil ceramsite are dry-mixed in a concrete mixer and uniformly stirred to obtain a primary mixed dry material;
s 2: and (4) adding 80% of the required water into the primary mixed dry material obtained in the step s1, uniformly stirring, adding the water reducing agent, the permeable concrete reinforcing agent and the rest 20% of water without stopping the concrete mixer after stirring, continuously stirring after adding, and uniformly stirring to form the primary mixed material.
By adopting the technical scheme and combining the performance detection data of the embodiment 3 and the comparative example 2, the LC lightweight concrete prepared by the step has better compressive strength. The result is that the lightweight soil ceramsite, the mineral admixture and the cement are firstly stirred, so that the cementing material is fully attached to the lightweight soil ceramsite, and then different particles can be bonded by means of the lightweight soil ceramsite after the lightweight soil ceramsite is subsequently added, so that the connection among the particles in the coarse aggregate is better formed, and finally, the concrete aggregate has stronger connection relation, and has higher compressive strength.
To sum up, the beneficial technical effect of this application does:
(1) the cementing material is stably bonded with each particle by utilizing the high adhesiveness of the light-weight soil ceramsite, so that the LC all-light-weight concrete is finally formed and has stronger pressure resistance.
(2) The light-weight soil ceramsite is a honeycomb light-weight soil ceramsite with more excellent strength and larger surface area, so that the bonding effect between the final coarse aggregates and the overall strength of the bonded concrete are further enhanced;
(3) the lightweight soil ceramsite, the cementing material and the like are stirred first, so that the lightweight soil ceramsite is fully bonded with the cementing material, the bonding relation between two kinds of follow-up aggregates after contact is further enhanced, and the compression resistance of concrete is finally improved.
Detailed Description
Example 1
The application discloses LC all-light concrete which comprises light-soil ceramsite, fine sand, cement, a water reducing agent, a mineral admixture and water, wherein the light-soil ceramsite is honeycomb-type light-soil ceramsite; the mineral admixture comprises fly ash, mineral powder and silica fume, and the specific parts by weight of the components are detailed in table 1.
In addition, the light soil ceramsite is continuously graded, and the particle size of the light soil ceramsite is 5-10 mm. The solid content of the adopted water reducing agent is 20 percent, and the water reducing rate is more than 30 percent.
The preparation method of the LC all-light concrete comprises the following steps:
s1: putting cement, mineral admixture, light soil ceramsite, water and water reducing agent into a concrete mixer for stirring to obtain a primary mixed material;
s2: and (4) putting the light soil ceramsite into the primary mixed material obtained in the step S1, and stirring to obtain the LC all-light concrete.
Wherein, the process of S1 includes the following steps:
s 1: the cement, the mineral admixture and the light soil ceramsite are dry-mixed in a concrete mixer and uniformly stirred to obtain a primary mixed dry material;
s 2: and (4) adding 80% of the required water into the primary mixed dry material obtained in the step s1, uniformly stirring, adding the water reducing agent, the permeable concrete reinforcing agent and the rest 20% of water without stopping the concrete mixer after stirring, continuously stirring after adding, and uniformly stirring to form the primary mixed material.
Examples 2 to 6
The difference from example 1 is that the weight parts of each component are different, and the detailed numerical values are shown in Table 1.
Example 7
The difference from example 3 is that the light-weight ceramsite used in this example is a conventional light-weight ceramsite other than the honeycomb light-weight ceramsite.
Example 8
The difference from the example 3 is that the light-soil ceramsite and the light-soil ceramsite used in the example are both prepared by adopting discontinuous gradation
Comparative example 1
The difference from example 3 is that the light-earth ceramsite is replaced by gravel particles in this example.
Comparative example 2
The difference from the embodiment 3 is that the preparation method of the LC lightweight concrete in the embodiment includes the following steps:
s1, putting the cement, the mineral admixture, the light-weight soil ceramsite and the fine sand into a concrete mixer together for dry mixing, and uniformly mixing to obtain a mixed material;
and S2, adding a water reducing agent and required water into the mixture obtained in the step S1, and uniformly stirring without stopping a concrete mixer in the water adding process to obtain the all-light concrete.
Table 1: LC full light concrete each component weight part number indication table
Performance detection test:
the concrete samples obtained in the examples and comparative examples were subjected to a compressive strength test, wherein the concrete samples were cubes of 15cm × 15cm × 15cm, three in each set, and cured by a standard method (temperature 20 ℃ ± 2 ℃, relative humidity 95% RH or more) after molding. The resulting performance results are shown in table 2.
Table 2: compressive strength performance detection data table
And (4) analyzing results:
the combination of the performance test data shows that the LC lightweight concrete prepared by selecting the lightweight ceramsite as the coarse aggregate has better compressive strength, particularly, under the component proportion of the embodiment 3, the compressive strength at 28d can reach the grade of C45-C50 strength concrete, the support in the structure can be fully realized, and the lightweight ceramsite has smaller density, so that the integral volume weight of the prepared LC lightweight concrete is smaller. The result is that the light-weight soil ceramsite has a rougher surface, particularly the honeycomb-type light-weight soil ceramsite has a larger surface area, so that the concrete has stronger water absorption capacity during manufacturing, the bonding capacity is stronger when the light-weight soil ceramsite is combined with cementing materials such as cement and the like, the light-weight soil ceramsite is stably connected with fine sand fine aggregates around the light-weight soil ceramsite, and the compressive strength of the concrete formed by coarse aggregates is finally improved.
By combining the performance test data of the embodiment 3 and the embodiment 7, the compressive strength of the finally prepared LC all-light concrete can be effectively improved when the adopted light-weight ceramsite is the honeycomb light-weight ceramsite under the condition that other components and the preparation method are not changed. The result is that the single particles of the cellular light-weight soil ceramsite have larger surface area and water absorption capacity than the conventional light-weight soil ceramsite, and the pores on the cellular light-weight soil ceramsite are mostly of a triangular structure, so that the cellular light-weight soil ceramsite particles have higher strength, and finally, the concrete obtained after bonding other light-weight soil ceramsite by combining a cementing material has larger compressive strength.
The performance test data of the embodiment 3 and the embodiment 8 are combined, so that the compressive strength of the finally prepared LC all-light concrete can be effectively improved by adopting the continuous grading time distribution of the light soil ceramsite under the condition that the components and the preparation method are not changed. The result is that the gaps among the continuously graded aggregate particles are smaller than those among the discontinuously graded aggregate particles, and finally the prepared concrete aggregate particles are relatively tighter, so that the concrete aggregate particles have better connection strength and better compression and load bearing capacity.
By combining the performance test data of example 3 and comparative example 2, it can be seen that the LC lightweight concrete prepared by the steps of example 3 has better compressive strength while the components are kept unchanged. Compared with the conventional preparation method of mixing all the materials in the comparative example 2, the light-weight soil ceramsite, the mineral admixture and the cement are firstly mixed in the example 3, so that the cementing material is fully attached to the light-weight soil ceramsite, and then different particles can be bonded by means of the light-weight soil ceramsite after the light-weight soil ceramsite is subsequently added, so that better connection among particles in the concrete is formed, and finally, the prepared concrete aggregate has stronger connection relation, so that the concrete aggregate has higher structural strength.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. An LC all-light concrete is characterized in that: the composition comprises the following components in parts by weight:
light soil ceramsite: 900 portion and 1160 portion;
fine sand: 600-780 parts;
cement: 310-380 parts;
water reducing agent: 8.5-10.2 parts;
mineral admixture: 230-285 parts;
135 portions and 165 portions of water.
2. The LC all-light concrete according to claim 1, wherein: the light soil ceramsite is honeycomb type light soil ceramsite.
3. The LC all-light concrete according to claim 1, wherein: the particle size of the light soil ceramsite is 5-10 mm.
4. The LC all-light concrete according to claim 1, wherein: the light soil ceramsite adopts continuous gradation.
5. The LC all-light concrete according to claim 1, wherein: the mineral admixture comprises the following components in parts by weight:
80-100 parts of fly ash;
110 portions and 130 portions of mineral powder;
40-55 parts of silica fume.
6. The LC all-light concrete according to claim 1, wherein: the solid content of the adopted water reducing agent is 20 percent, and the water reducing rate is more than 30 percent.
7. The method for preparing LC all-light concrete according to any one of claims 1 to 6, characterized by comprising the following steps:
s1: putting cement, mineral admixture, light soil ceramsite, water and water reducing agent into a concrete mixer for stirring to obtain a primary mixed material;
s2: and (4) putting the fine sand into the primary mixed material obtained in the step S1, and stirring to obtain the all-light concrete.
8. The LC all-light concrete according to claim 7, wherein: step S1 includes the following steps:
s 1: the cement, the mineral admixture and the light soil ceramsite are dry-mixed in a concrete mixer and uniformly stirred to obtain a primary mixed dry material;
s 2: and (4) adding 80% of the required water into the primary mixed dry material obtained in the step s1, uniformly stirring, adding the water reducing agent and the rest 20% of water without stopping the concrete mixer after stirring, continuously stirring after adding, and uniformly stirring to form the primary mixed material.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102746021A (en) * | 2012-07-31 | 2012-10-24 | 北京鸿锐嘉科技发展有限公司 | Chemical foaming cement building material prepared by utilizing light particles and preparation method thereof |
| CN107021678A (en) * | 2016-08-12 | 2017-08-08 | 儋州宇顺实业有限公司 | The formula and electric pole preparation method of a kind of non-evaporating curing concrete of light high performance |
| CN110218051A (en) * | 2019-06-17 | 2019-09-10 | 成都精准混凝土有限公司 | A kind of high strength lightweight aggregate concrete and its preparation process |
| CN110304876A (en) * | 2019-06-17 | 2019-10-08 | 三峡大学 | A kind of complete gently haydite concrete and preparation method thereof |
-
2020
- 2020-09-03 CN CN202010920186.8A patent/CN112110686A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102746021A (en) * | 2012-07-31 | 2012-10-24 | 北京鸿锐嘉科技发展有限公司 | Chemical foaming cement building material prepared by utilizing light particles and preparation method thereof |
| CN107021678A (en) * | 2016-08-12 | 2017-08-08 | 儋州宇顺实业有限公司 | The formula and electric pole preparation method of a kind of non-evaporating curing concrete of light high performance |
| CN110218051A (en) * | 2019-06-17 | 2019-09-10 | 成都精准混凝土有限公司 | A kind of high strength lightweight aggregate concrete and its preparation process |
| CN110304876A (en) * | 2019-06-17 | 2019-10-08 | 三峡大学 | A kind of complete gently haydite concrete and preparation method thereof |
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