CN107540291A - A kind of concrete slurry and preparation method thereof - Google Patents

A kind of concrete slurry and preparation method thereof Download PDF

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Publication number
CN107540291A
CN107540291A CN201711059706.5A CN201711059706A CN107540291A CN 107540291 A CN107540291 A CN 107540291A CN 201711059706 A CN201711059706 A CN 201711059706A CN 107540291 A CN107540291 A CN 107540291A
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China
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concrete
ceramic granules
concrete slurry
slurry
mud ceramic
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CN201711059706.5A
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刘俊峰
谢建和
黄亮
李永超
何建华
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Guangdong University of Technology
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Guangdong University of Technology
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Abstract

The invention provides a kind of concrete slurry and preparation method thereof.Concrete slurry provided by the invention, its raw material include natural sand, mud ceramic granules, cement, water, water reducer, thickener and air entraining agent;The mass ratio of the cement, mud ceramic granules and natural sand is (20.0~30.0): (15.0~20.0): (42.0~50.0).Concrete slurry provided by the invention, as aggregate, without destroying natural resources, environmental protection, and using mud as haydite materials, is turned waste into wealth using mud ceramic granules, realizes recycling for waste resource;And provided slurry makes concrete sample be arranged in pairs or groups using specific raw material and dosage, preferable Physical interaction and chemical hydration are produced between each component, so that concrete sample has good compression strength, and its density is small, effectively reduce weight concrete, on the basis of realizing that waste resource recycles, the Physical and mechanical properties of slurry are also improved.

Description

A kind of concrete slurry and preparation method thereof
Technical field
The present invention relates to technical field of inorganic material, more particularly to a kind of concrete slurry and preparation method thereof.
Background technology
Concrete refers to aggregate formed composite cemented together by binder materials, is most normal in building field Foundation construction material.For conventional concrete mainly using rubble as aggregate, gained concrete is heavier, is not easy to construct, and broken The cementitiousness of stone and mortar is not good enough, makes the limited capacities such as strength on concrete material and durability, so as to limit concrete Building occupancy and load.
With the development of technology, haydite concrete arises at the historic moment, and haydite concrete is to replace part stone application with haydite In concrete.Compared to stone, haydite is in light weight, can reduce given tensile load, and then mitigates building deadweight, and haydite and sand Cementing power between slurry is stronger, it is possible to increase the performance such as concrete strength, durability, corrosion-resistant, frost resistance, has light, guarantor The advantages that warm, environmentally friendly.Therefore, haydite concrete is increasingly welcome by market.
But haydite used in haydite concrete is to fire to form, it is necessary to cut into a mountain with clay and shale to dig stone, in recovery process Natural environment is done great damage, environmental pressure aggravates, and has deviated from the strategic requirement of national sustainable development, has made haydite coagulation The production critical constraints of soil;Moreover, haydite is different from stone, when haydite is applied into concrete, and indirect substitution stone is Can, although haydite concrete has many advantages, the acquisition coagulation more common than tradition of haydite concrete than normal concrete Soil is more difficult, and the interaction between haydite and concrete material is increasingly complex, and also without ripe mechanism or rule, Need to rethink the selection and collocation of each raw material components of concrete and dosage when preparing haydite concrete, make haydite concrete Acquisition faces more challenges.Therefore, how to reduce environmental disruption and obtain the more polymorphic type of function admirable or the concrete of kind As the focus of extensive concern in the industry.
The content of the invention
In view of this, it is an object of the invention to provide a kind of concrete slurry and preparation method thereof.It is provided by the invention Concrete slurry using mud ceramic granules as aggregate, without destroying natural resources, meanwhile, providing slurry has concrete sample There is good compression strength, and density is small, effectively reduces weight concrete.
The invention provides a kind of concrete slurry, raw material includes natural sand, mud ceramic granules, cement, water, water reducer, increasing Thick dose and air entraining agent;
The mass ratio of the cement, mud ceramic granules and natural sand is (20.0~30.0): (15.0~20.0): (42.0~ 50.0)。
Preferably, mass percent of each component in concrete slurry is as follows:
Preferably, the particle diameter of the mud ceramic granules is 5~10mm.
Preferably, the 1h water absorption rates of the mud ceramic granules be 12.50%~16.50%, 24h water absorption rates be 17.00%~ 20.00%.
Preferably, the bulk density < 500kg/m of the mud ceramic granules3, cylindrical compress strength > 1.0MPa.
Preferably, mud content is 40%~55% in the raw material of the mud ceramic granules.
Preferably, the water reducer includes QL-PC2 polycarboxylate water-reducers.
Preferably, the thickener includes carboxymethyl cellulose acid sodium;The air entraining agent includes SJ-2 air entraining agents.
Preferably, the net water cementratio of the slurry is 0.35~0.45, and sand coarse aggregate ratio is 30%~40%.
Present invention also offers a kind of preparation method of concrete slurry, comprise the following steps:
A) mud ceramic granules are soaked pre-wetted treatment, obtains haydite of prewetting;
B) it is the haydite of prewetting, natural sand and cement mixing is uniform, obtain slurry precursor;
C) slurry precursor is mixed with thickener, air entraining agent, water reducer and water, obtains concrete slurry.
The invention provides a kind of concrete slurry, raw material includes natural sand, mud ceramic granules, cement, water, water reducer, increasing Thick dose and air entraining agent;The mass ratio of the cement, mud ceramic granules and natural sand is (20.0~30.0): (15.0~20.0): (42.0~50.0).Concrete slurry provided by the invention is using mud ceramic granules as aggregate, without destroying natural resources, protection Environment, and using mud as haydite materials, turn waste into wealth, realize recycling for waste resource;Importantly, provided slurry Material makes concrete sample be arranged in pairs or groups using specific raw material and dosage, and preferable Physical interaction and chemistry are produced between each component Hydration so that concrete sample has good compression strength, and its density is small, effectively reduces weight concrete, in reality On the basis of existing waste resource recycles, the Physical and mechanical properties of slurry are also improved.In optimization technique side provided by the invention In case, by the further optimum choice of proportioning to cement, mud ceramic granules and natural sand, the resistance to compression of concrete is further improved Intensity.
Embodiment
The invention provides a kind of concrete slurry, including natural sand, mud ceramic granules, cement, water, water reducer, thickener And air entraining agent;
The mass ratio of the cement, mud ceramic granules and natural sand is (20.0~30.0): (15.0~20.0): (42.0~ 50.0)。
Concrete slurry provided by the invention is raw materials used including mud ceramic granules, and mud ceramic granules are with river bed or bottom silt For primary raw material after high-temperature expansion obtained haydite.The present invention is using mud ceramic granules as concrete coarse aggregate, the mud pottery Grain obtains by raw material of discarded object, will not destroy natural resources, additionally it is possible to waste resource is re-used, while environmental protection Realize most optimum distribution of resources.
Mud ceramic granules include the haydite of the various different parameters features such as different grain size size, different water absorption rates, different grain types, In the present invention, it is preferred to use granularity is 5~10mm mud ceramic granules;In the particle size range, mud ceramic granules can be with this hair Other raw materials form good grading in bright, reach optimal stacking states, are advantageous to improve Physical And Mechanical Properties of Concrete.
In the present invention, it is preferred to use 1h water absorption rates be 12.50%~16.50%, 24h water absorption rates be 17.00%~ 20.00% mud ceramic granules;In certain embodiments, 1h water absorption rates are used as silt that 13.80%, 24h water absorption rates are 18.38% Mud haydite.Through applicants have found that, the present invention using the mud ceramic granules in the range of the water absorption rate, with other groups of the present invention When dividing mixing, the space of prosperity can be formed and produce the porosity of optimum state, acted synergistically with other components, make concrete With higher compression strength, if water absorption rate is less than or beyond above range, can cause compression strength to decline.
In the present invention, the bulk density < 500kg/m of mud ceramic granules are preferably controlled3, 500kg/m is less than using bulk density3 Mud ceramic granules, lightweight coarse aggregate can be used as, be advantageous to make concrete loss of weight, lightweight concrete is obtained, be easy to construct.The present invention In, it is preferred to use cylindrical compress strength > 1.0MPa mud ceramic granules.In the present invention, it is preferred to use spheroidal mud ceramic granules;The circle The preferred < 1.4 of grain type coefficient of spherical mud ceramic granules.In the present invention, mass ratio of the mud ceramic granules in concrete slurry raw material is excellent Elect 15.0%~20.0% as.
Concrete slurry provided by the invention is raw materials used also to include cement.The present invention is to the species of the cement without spy Different limitation, it is concrete traditional cements, preferably Portland cement, more preferably 32.5R grades in this area Portland cement.In some embodiments provided by the invention, i.e., using the Portland cement of 32.5R grades.This In invention, mass ratio of the cement in concrete slurry raw material is preferably 20.0%~30.0%.
Concrete slurry provided by the invention is raw materials used also to include natural sand.The present invention using natural sand as fine aggregate and Mud ceramic granules coarse aggregate is arranged in pairs or groups, and the natural sand is preferably particle diameter≤5mm natural sand, and it can be with mud ceramic granules coarse aggregate shape Into good grading, reach closest packing state, be advantageous to improve concrete combination property.In the present invention, natural sand is in concrete Mass ratio in slurry feedstock is preferably 42.0%~50.0%.In the present invention, the sand coarse aggregate ratio of concrete slurry is preferably 30%~ 40%;Sand coarse aggregate ratio refers to the volume ratio of natural sand/(natural sand+mud ceramic granules).In the present invention, the loose cumulative volume of coarse-fine aggregate is 1.1~1.4m3;Coarse aggregate is mud ceramic granules, and fine aggregate is natural sand.
In the present invention, the mass ratio of cement, mud ceramic granules and natural sand is (20.0~30.0): (15.0~20.0): (42.0~50.0), it is preferably (25~29): (15~18): (42~46), more preferably (27~29): (15~17): (43~ 46), most preferably 28.99: 16.97: 43.14.The mass ratio of cement, mud ceramic granules and natural sand is controlled in the ratio model In enclosing, concrete can produce good compression strength, under preferred proportion, can further improve compression strength.
Concrete slurry provided by the invention is raw materials used also to include water reducer.In the present invention, the water reducer preferably wraps Include QL-PC2 polycarboxylate water-reducers;The liquid water reducer that the QL-PC2 polycarboxylate water-reducers are solid content or concentration is 20%. In certain embodiments, use concentration for 20% liquid QL-PC2 polycarboxylate water-reducers, its can preferably with the present invention its Its component is arranged in pairs or groups and interaction, and good peptizaiton is produced to components such as cement granules, reaches good water-reducing effect, makes Slurry has preferable mobility, so as to ensure the processability of concrete and strength character.In the present invention, water reducer is in concrete Mass ratio in slurry feedstock is preferably 0.2%~0.4%, more preferably the 1.2% of cement consumption.
Concrete slurry provided by the invention is raw materials used also to include thickener.In the present invention, the thickener preferably wraps Carboxymethyl cellulose acid sodium (CMC) is included, it can enable the education resistance of concrete slurry of the present invention preferably be improved.This hair In bright, mass ratio of the thickener in concrete slurry raw material is preferably 0.001%~0.01%, more preferably cement consumption 0.02%, in the scope, slurry had both been can guarantee that good education resistance, and can ensures good mobility.
Concrete slurry provided by the invention is raw materials used also to include air entraining agent.In the present invention, the air entraining agent preferably wraps SJ-2 air entraining agents are included, it can improve the workability of slurry of the present invention, reduce the particle of mud ceramic granules aggregate and natural sand aggregate Friction, makes slurry have good mobility.Though the introducing of air entraining agent makes moderate progress to the mobility of slurry, may cause Concrete strength reduces, thus the addition of air entraining agent whether and species select more difficult assurance, present invention preferably employs SJ-2 air entraining agents, Not only improve slurry workability, also contribute to compression strength.In the present invention, matter of the air entraining agent in concrete slurry raw material Measure the 0.03% of ratio preferably 0.001%~0.01%, more preferably cement consumption.
Concrete slurry provided by the invention is raw materials used also to include water.In the present invention, the mass ratio of water in the feed is excellent Elect 10.0%~12.0% as.In the present invention, the net water cementratio (i.e. the mass ratio of water and cement) of concrete slurry is preferably 0.35~0.45.
Concrete slurry provided by the invention using mud ceramic granules as aggregate, without destroying natural resources, environmental protection, And using mud as haydite materials, turn waste into wealth, realize recycling for waste resource;Importantly, provided slurry makes Concrete sample is arranged in pairs or groups using specific raw material and dosage, and preferable Physical interaction and chemical aquation are produced between each component Effect so that concrete sample has good compression strength, and its density is small, effectively reduces weight concrete, useless realizing Abandon on the basis of resource reutilization, also improve the Physical and mechanical properties of slurry.It is test result indicates that provided by the invention mixed Solidifying soil paste material makes compression strength > 7.0MPa, apparent density the < 1300kg/m of concrete sample3, it is that a kind of mechanical performance is excellent Lightweight concrete.
Present invention also offers a kind of preparation method of concrete slurry, comprise the following steps:
A) mud ceramic granules are soaked pre-wetted treatment, obtains haydite of prewetting;
B) it is the haydite of prewetting, natural sand and cement mixing is uniform, obtain slurry precursor;
C) slurry precursor is mixed with thickener, air entraining agent, water reducer and water, obtains concrete slurry.
Wherein, the species of the mud ceramic granules, natural sand, water, cement, thickener, air entraining agent and water reducer and dosage etc. With consistent described in above-mentioned technical proposal, this is no longer going to repeat them.
According to the present invention, first mud ceramic granules are soaked pre-wetted treatment, saturated dry surface of the re-dry to surface without ponding, Obtain pre-wetted treatment haydite.
Mud ceramic granules are carried out immersion pre-wetted treatment by the present invention with being immersed in the water, and mud ceramic granules is fully absorbed water.The present invention In, the time for processing of soaking is preferably 0.5~2h, more preferably 1h.In the present invention, after immersion processing, preferably it is dried straight To saturated dry surface of the mud ceramic granules surface without ponding;The mode of the drying is not particularly limited, such as can be with naturally dry. Dry to surface without ponding after, obtain haydite of prewetting.
It is after the haydite that obtains prewetting, the haydite of prewetting, natural sand and cement mixing is uniform according to the present invention, starched Expect precursor.Wherein, the mode of the mixing is preferably and stirred using mixer, time of the stirring preferably≤1min, More preferably 30~50s.More preferably 30~40s, most preferably 30s.
According to the present invention, after obtaining slurry precursor, then by the slurry precursor and thickener, air entraining agent, water reducer and water Mixing, obtains concrete slurry.Wherein, the mode of the mixing be preferably stirred using mixer, the stirring when Between be preferably 100~300s, most preferably more preferably 150~250s, more preferably 150~200s, 150s.Will be all After raw material stirs, concrete slurry is obtained.
Present invention also offers a kind of blanks and moulding and conserving method of concrete, comprise the following steps:
S1 concrete slurry) is entered into mould at twice, entered for the first time to 2/3 mould eminence, carries out closely knit processing for the first time, afterwards Continue to feed it is paramount go out mould, carry out second of closely knit processing;
S2 8h before) being molded, every 2~3h, pressure processing is smeared using pressure instrument progress top layer is smeared;
S3 the blanket parcel test specimen after immersion) is used, keeps having condensate in blanket, waters daily twice, continuous processing 7 days Afterwards, shaping is conserved under natural environment.
Wherein, step S1) in, closely knit processing for the first time preferably manually plugs and pounds mode, plugs and pounds number as 20~60 times.The Secondary closely knit processing is preferably to be vibrated processing using surface vibrator, and vibrating time is 2~10s.Step S2) in, in concrete 8h before shaping, every 2~3h, pressure processing is smeared using pressure instrument progress top layer is smeared, mud ceramic granules can be avoided to float;It can such as use The instrument such as clappers or vibrating float carries out smearing pressure to test specimen top layer.If particle floating area is larger, can be answered using surface vibrator Shake, be that mortar returns, then carry out smearing pressure.
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, still It should be appreciated that these descriptions are simply further explanation the features and advantages of the present invention, rather than to the claims in the present invention Limitation.
In following examples, cement used is the Portland cement of stone well board 32.5R grades.Natural sand be particle diameter≤ Thick river sand in 5mm.The particle diameter of mud ceramic granules lightweight aggregate is 5~10mm, and 1h water absorption rates are that 13.80%, 24h water absorption rates are 18.38%;Bulk density < 500kg/m3, cylindrical compress strength 1.19MPa;For spherical granules, grain type coefficient is 1.32, is belonged to Grade A, provided by Jiangmen city Wei Sheng haydites factory.Water reducer is the liquid QL-PC2 polycarboxylate water-reducers that concentration is 20%, by river Retail sales strength company provides.Thickener is CMC thickeners, and composition is sodium carboxymethylcellulose, white powdered, by Shanghai Shen Optical eclipse product Chemical Co., Ltd. provides.It is the SJ-2 air entraining agents in yellow powder to cause agent.
Embodiment 1~8
The preparation of 1.1 concrete slurries:
Lightweight aggregate mud ceramic granules are carried out with 1h immersion pre-wetted treatments, is dried in the air to saturated dry surface of the surface without ponding, then Putting into stirring 30s in forced mixer in the lump with natural sand, cement is well mixed each material, afterwards by thickener, bleed Agent puts into mixer, then pours into water reducer, and the water reducer remained on the wall is poured into mixer in the lump with test water amount Middle stirring 150s, obtains concrete slurry.Wherein, for each raw material dosage referring to table 1, table 1 is the gained concrete grout of embodiment 1~8 Each raw material dosage of material, each component dosage are mass percent of each component in total component, unit %.
Each raw material dosage of the gained concrete slurry of 1 embodiment of table 1~8
The blanks and moulding and conserving of 1.2 test specimens:
Slurry is entered into mould at twice, entered for the first time to 2/3 mould eminence, it is closely knit manually to plug and pound 30 progress, and second will slurry Expect into it is paramount go out mould, using surface vibrator vibrate 5s carry out it is closely knit;To avoid haydite from floating, 8h before the forming, every 2~ 3h is smeared pressure to test specimen top layer back and forth using clappers or vibrating float, and degranulation floating area is larger, using surface vibrator Shake again, mortar is smeared pressure again after returning.Test specimen is wrapped up tightly with the woollen blanket to soak afterwards, keeps having condensate in blanket, often Its watering twice, after continuously watering 7 days, conserves shaping under natural environment.
The test of 1.3 test specimen physical and mechanical properties:
According to《Lightweight aggregate concrete technology code JG151-2002》Overall test specimen drying in dry apparent density determination method Method carries out the test of apparent density, and each embodiment takes 3 test block tests, averaged;Tried using MATEST resistance to compressions (hydraulic pressure) Test machine implementation uniaxial compression loading to test the compression strength of cube concrete sample, each embodiment takes 3 test blocks Test, averages.For test result referring to table 2, table 2 is the physical and mechanical property test of the gained concrete sample of embodiment 1~8 As a result.
The physical and mechanical property test result of the gained concrete sample of 2 embodiment of table 1~8
As seen from the above embodiment, concrete slurry provided by the invention has higher compression strength, and dry density exists 1100~1300kg/m3Between, it is high-strength lightweight concrete.Wherein, the compression strength of embodiment 7 and embodiment 8 is more than 7MPa is less than 8MPa, by contrast, cement: mud ceramic granules: the mass ratio of sand is in preferred scope (25~29): (15~18): The compression strength > 8MPa of the embodiment 1~6 of (42~46), compression strength further improve;Cement: mud ceramic granules: the matter of sand Amount ratio is in preferred scope (27~29): (15~17): the compression strength > 9MPa of the embodiment 2 of (43~46), compression strength It is obviously improved;Cement:Mud ceramic granules:The mass ratio of sand resists at optimal proportion 28.99: 16.97: 43.14 (embodiment 1) Compressive Strength reaches 10.84MPa, is significantly improved.
Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said It is bright to be only intended to help the method and its core concept for understanding the present invention, including best mode,
And also cause any person skilled in the art to put into practice the present invention, including manufacture and using any device Or system, and implement the method for any combination.It should be pointed out that for those skilled in the art, do not taking off On the premise of from the principle of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into this In invention scope of the claims.The scope of patent protection of the present invention is defined by the claims, and may include ability Field technique personnel it is conceivable that other embodiment.If these other embodiments, which have, is similar to claim character express Structural element, or if they include equivalent structural elements of the character express without essence difference with claim, then this A little other embodiments should also include within the scope of the claims.

Claims (10)

1. a kind of concrete slurry, it is characterised in that raw material includes natural sand, mud ceramic granules, cement, water, water reducer, thickener And air entraining agent;
The mass ratio of the cement, mud ceramic granules and natural sand is (20.0~30.0): (15.0~20.0): (42.0~ 50.0)。
2. concrete slurry according to claim 1, it is characterised in that quality percentage of each component in concrete slurry Than as follows:
3. concrete slurry according to claim 1 or 2, it is characterised in that the particle diameter of the mud ceramic granules be 5~ 10mm。
4. concrete slurry according to claim 3, it is characterised in that the 1h water absorption rates of the mud ceramic granules are 12.50%~16.50%, 24h water absorption rate are 17.00%~20.00%.
5. concrete slurry according to claim 3, it is characterised in that the bulk density < 500kg/ of the mud ceramic granules m3, cylindrical compress strength > 1.0MPa.
6. concrete slurry according to claim 3, it is characterised in that mud content is in the raw material of the mud ceramic granules 40%~55%.
7. concrete slurry according to claim 1, it is characterised in that the water reducer includes QL-PC2 polycarboxylic acids diminishings Agent.
8. concrete slurry according to claim 1, it is characterised in that the thickener includes carboxymethyl cellulose acid sodium; The air entraining agent includes SJ-2 air entraining agents.
9. concrete slurry according to claim 1, it is characterised in that the net water cementratio of the slurry be 0.35~ 0.45, sand coarse aggregate ratio is 30%~40%.
10. a kind of preparation method of concrete slurry, it is characterised in that comprise the following steps:
A) mud ceramic granules are soaked pre-wetted treatment, obtains haydite of prewetting;
B) it is the haydite of prewetting, natural sand and cement mixing is uniform, obtain slurry precursor;
C) slurry precursor is mixed with thickener, air entraining agent, water reducer and water, obtains concrete slurry.
CN201711059706.5A 2017-11-01 2017-11-01 A kind of concrete slurry and preparation method thereof Pending CN107540291A (en)

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CN112248228A (en) * 2020-11-02 2021-01-22 南京茂汇盈科技有限公司 High-strength premixed concrete production equipment and production process

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Application publication date: 20180105