CN1203023C - Process for preparing high-strength light aggregate concrete - Google Patents
Process for preparing high-strength light aggregate concrete Download PDFInfo
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- CN1203023C CN1203023C CNB031253105A CN03125310A CN1203023C CN 1203023 C CN1203023 C CN 1203023C CN B031253105 A CNB031253105 A CN B031253105A CN 03125310 A CN03125310 A CN 03125310A CN 1203023 C CN1203023 C CN 1203023C
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- water
- cement
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- light aggregate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The present invention relates to a method for preparing high-strength light aggregate concrete, which comprises the steps for preprocessing light aggregate and preparing light aggregate concrete, wherein the step for preprocessing light aggregate comprises two processes, the preparation of cement slurry for preprocessing and the addition of light aggregate. The cement slurry for preprocessing comprises cement, superfine admixtures, water soluble polypropylene emulsion, water reducing agent FDN and water. In the process of the addition of light aggregate, the light aggregate is added into the cement slurry for preprocessing and then the mixture is stirred for 1 to 3 min., and the final mixture is taken out and cured for one to three days at the temperature of 20 (+/-) 3 DEG C with the relative humidity of 90 (+/-) 5% for using. In the step for preparing light aggregate concrete, the high-strength light aggregate concrete comprises preprocessed light aggregate, cement, fine aggregate, silica fume, water reducing agent FDN and water, wherein the raw materials are stirred proportionally and uniformly to be prepared into slurry so as to obtain finished products. The method can effectively enhance the granule intensity of the light aggregate, lower the water absorption rate, obviously enhance the strength of the light aggregate and improve the pumping performance of the light aggregate concrete.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of preparation method of light aggregate concrete, it can effectively improve the light-weight aggregate granule strength, reduce water-intake rate, significantly increases light aggregate concrete intensity and improves the light aggregate concrete pumping workability.
Background technology
Light aggregate concrete has the characteristics of lightweight, durable, energy-saving and environmental protection, have broad application prospects in fields such as Highrise buildings, longspan structure engineerings, but the intensity of light aggregate concrete is lower, the maximum intensity grade of practical engineering application only is LC60, and pumping construction poor-performing, be difficult to satisfy the requirement of heavy construction, limited the application of light aggregate concrete to a great extent intensity and workability.The major cause that causes above problem is that the granule strength of light-weight aggregate self is lower, and its water-intake rate has remarkable increase under pressure, and then causes stifled pump easily.At above problem, the main at present method of low water absorption light-weight aggregate or surperficial glazing processing that adopts is to realize pumping construction, but it is bigger that low water absorption light-weight aggregate water-intake rate under pump function still increases, so can not effectively improve the pumping construction performance of light aggregate concrete.Though the water-intake rate that can effectively reduce light-weight aggregate is handled in surface glazing to light-weight aggregate, improves the pumping construction performance, the interfacial bond property that will reduce between light-weight aggregate and the cement stone is handled in glazing; Aspect the technical measures that improve light aggregate concrete intensity, main by methods such as admixture silicon ash, use cement of high index, increase cement consumptions, but above method not only increases cost, but also can reduce concrete workability, so be unfavorable for pumping construction more.Though use high-strength light-weight aggregate can effectively increase concrete intensity, the granule strength of present high-strength light-weight aggregate is mainly at 6.0～8.0MPa, so be difficult to prepare the above high strength lightweight aggregate concrete of the good LC60 of serviceability.
Summary of the invention
Subject matter at above light-weight aggregate and light aggregate concrete existence, the object of the present invention is to provide a kind of raising light-weight aggregate granule strength, reduce water-intake rate, significantly increase light aggregate concrete intensity and the preparation method who improves the high strength lightweight aggregate concrete of light aggregate concrete pumping workability.
To achieve these goals, technical scheme of the present invention is:
The preparation method of high strength lightweight aggregate concrete is characterized in that: realized by following steps: 1). the pre-treatment of light-weight aggregate, described light-weight aggregate particle diameter 5-20mm, apparent density 1200-1500kg/m3, tap density 700-1100kg/m3, cylindrical compress strength 3-8Mpa;
A). the preparation of pretreated water slurry body, pretreated water slurry body cement, super fine powder additives, water-soluble polypropylene yogurt liquid, naphthalene sulfonic salt formaldehyde condensation products series water reducer, water are formed, and the each component weight part is:
Water 1, cement 1.35～1.80, super fine powder additives 0.10～0.50, water-soluble polypropylene yogurt liquid, in cement consumption percentage ratio 8～15, naphthalene sulfonic salt formaldehyde condensation products series water reducer, in cement consumption percentage ratio 0.3～0.5, above-mentioned component stirred make the pretreated water slurry body;
B). light-weight aggregate put into take out after above-mentioned pretreated water slurry body stirs 1～3min, in relative humidity 90 ± 5%, maintenance is 1～3 day under 20 ± 3 ℃ of conditions of temperature, and is stand-by;
Described super fine powder additives is wherein a kind of or two kinds of mixing of silicon ash or superfined flyash;
2). the preparation of light aggregate concrete: high strength lightweight aggregate concrete, form by pretreated light-weight aggregate, cement, fine aggregate, silicon ash, naphthalene sulfonic salt formaldehyde condensation products series water reducer, water, wherein fine aggregate is a sand, above-mentioned each component weight part is:
Water 1, pretreated light-weight aggregate 3.00～3.50, cement 2.90～3.50, fine aggregate 3.80～3.95, silicon ash 0.15～0.40, naphthalene sulfonic salt formaldehyde condensation products series water reducer, in cement consumption percentage ratio 0.8～1.4, above-mentioned component stirred make slurry, promptly get product.
Described pretreated water slurry body, each component optimum weight part is:
Cement 1.35, silicon ash 0.17, superfined flyash 0.33, water-soluble polypropylene yogurt liquid (cement consumption %) 10, water reducer FDN (cement consumption %) 0.4, water 1.
Described high strength lightweight aggregate concrete, each component optimum weight part is:
Pretreated light-weight aggregate 3.36, cement 3.2, fine aggregate 3.94, silicon ash 0.32, water reducer FDN (cement consumption %) 1.2, water 1.
Described fine aggregate is river sand or machine-processed sand.
Described light-weight aggregate is: particle diameter 5-20mm, apparent density 1200-1500kg/m
3, tap density 700-1100kg/m
3, the leca of cylindrical compress strength 〉=25Mpa or haydites of book structure or lytag.
Described naphthalene sulfonic salt formaldehyde condensation products series water reducer water-reducing rate is greater than 20%.
Employing is mixed with the pretreated water slurry body by a certain percentage by cement, silicon ash, superfined flyash, water-soluble polypropylene yogurt liquid, water reducer, water, utilizing it is that the light-weight aggregate of 6.0～8.0MPa carries out pre-treatment to granule strength, light-weight aggregate self cylindrical compress strength is improved more than 30%, and normal pressure water-intake rate and pressure water absorption rate are reduced in 5%.Utilize this kind light-weight aggregate to prepare to satisfy the LC50～LC70 high strength lightweight aggregate concrete of pumping construction requirement.Can be used in and produce LC50-LC70 pumping high strength lightweight aggregate concrete.
Technical indicator:
Pretreated light-weight aggregate performance index:
Cylindrical compress strength: more than the 8.0MPa
Pellet density: 1400～1900kg/m
3
Water-intake rate: less than 3%
6MPa pressure water absorption rate: less than 5%
The pretreated light aggregate concrete performance index of process:
Mechanical property: 28d ultimate compression strength 60-80MPa
The slump: 18～24cm
Divergence: 50～60cm
Apparent density: 1860-2100kg/m
3
Young's modulus: 20-37GPa
Impervious grade: more than the P12
Freeze proof grade: 〉=F100.
Embodiment
Embodiment 1: the preparation method of high strength lightweight aggregate concrete, realize by pressing step:
1. starting material are prepared:
Light-weight aggregate: particle diameter 5-20mm, apparent density 1200-1500kg/m
3, tap density 700-1100kg/m
3, cylindrical compress strength 3-8MPa),
Cement: 42.5,52.5 ordinary portland cements (or silicate cement, slag cement, pulverized fuel ash cement, specific surface area 500m
2/ kg),
Fine aggregate: sand (river sand, fineness modulus 2.4-3.1),
Flyash: specific surface area 500m
2/ kg,
The silicon ash: active silica content is greater than more than 90%,
Water reducer FDN: naphthalene sulfonic salt FDN, water-reducing rate is more than 20%,
Polymkeric substance: water-soluble polypropylene yogurt liquid.
2. the pre-treatment of light-weight aggregate: a). the preparation of pretreated water slurry body, the pretreated water slurry body is made up of cement, silicon ash and flyash, water-soluble polypropylene yogurt liquid, water reducer FDN (naphthalene sulfonic salt formaldehyde condensation products series water reducer), water, and the each component proportioning is:
Pretreated water slurry body proportioning Kg/m
3
| Water | Cement | The silicon ash | Flyash | Water reducer FDN (cement consumption %) | Polymkeric substance (cement consumption %) |
| 1 | 1.35 | 0.17 | 0.33 | 0.4 | 10 |
Set up the pretreatment pool of 5 * a 5 * 5m, above-mentioned component mixing and stirring is made the pretreated water slurry body;
B). take out after light-weight aggregate put into the artificial or mechanical stirring 3min of above-mentioned pretreated water slurry body, pull out drain after, in relative humidity 90 ± 5%, maintenance is 3 days under 20 ± 3 ℃ of conditions of temperature, and is stand-by;
3. the preparation of light aggregate concrete: high strength lightweight aggregate concrete, to form by pretreated light-weight aggregate, cement, fine aggregate, silicon ash, water reducer FDN, water, the each component cooperation is:
LC70 high strength lightweight aggregate concrete proportioning Kg/m
3
| Water | Water reducer FDN (cement consumption %) | Cement | The silicon ash | Pretreated light-weight aggregate | River sand |
| 1 | 1.2 | 3.2 | 0.32 | 3.36 | 3.94 |
In proportion after the weighing in forced concrete mixer mix evenly after, can adopt pumping construction.
Embodiment 2: the preparation method of high strength lightweight aggregate concrete, realize by pressing step:
1. starting material are prepared:
Light-weight aggregate: particle diameter 5-20mm, apparent density 1200-1500kg/m
3, tap density 700-1100kg/m
3, cylindrical compress strength 3-8MPa),
Cement: 42.5,52.5 ordinary portland cements (or silicate cement, slag cement, pulverized fuel ash cement, specific surface area 500m
2/ kg),
Fine aggregate: sand (river sand, fineness modulus 2.4-3.1),
Flyash: specific surface area 500m
2/ kg,
The silicon ash: active silica content is greater than more than 90%,
Water reducer FDN: naphthalene sulfonic salt FDN, water-reducing rate is more than 20%,
Polymkeric substance: water-soluble polypropylene yogurt liquid.
2. the pre-treatment of light-weight aggregate: a). the preparation of pretreated water slurry body, the pretreated water slurry body is made up of cement, silicon ash and flyash, water-soluble polypropylene yogurt liquid, water reducer FDN, water, and the each component proportioning is:
Pretreated water slurry body proportioning Kg/m
3
| Water | Cement | The silicon ash | Flyash | Water reducer FDN (cement consumption %) | Polymkeric substance (cement consumption %) |
| 1 | 1.35 | 0.17 | 0.33 | 0.4 | 10 |
Set up the pretreatment pool of 5 * a 5 * 5m, above-mentioned component is stirred make the pretreated water slurry body;
B). take out after light-weight aggregate put into the artificial or mechanical stirring 3min of above-mentioned pretreated water slurry body, pull out drain after, in relative humidity 90 ± 5%, maintenance is 3 days under 20 ± 3 ℃ of conditions of temperature, and is stand-by;
3. the preparation of light aggregate concrete: high strength lightweight aggregate concrete, to form by pretreated light-weight aggregate, cement, fine aggregate, silicon ash, water reducer FDN, water, the each component cooperation is:
LC50 high strength lightweight aggregate concrete proportioning Kg/m
3
| Water | Water reducer FDN (cement consumption %) | Cement | The silicon ash | Pretreated light-weight aggregate | River sand |
| 1 | 1.0 | 2.90 | 0.16 | 3.50 | 3.90 |
In proportion after the weighing in forced concrete mixer mix evenly after, can adopt pumping construction.
Embodiment 3: the preparation method of high strength lightweight aggregate concrete, realized by following steps:
1. the pre-treatment of light-weight aggregate: a). the preparation of pretreated water slurry body, the pretreated water slurry body is made up of cement, silicon ash, water-soluble polypropylene yogurt liquid, water reducer FDN, water, and the each component weight part is:
Cement 1.35, silicon ash 0.20, water-soluble polypropylene yogurt liquid (cement consumption %) 8, naphthalene sulfonic salt FDN series of high efficiency water reducer (cement consumption %) 0.3, water 1 stir above-mentioned component and make the pretreated water slurry body;
B). light-weight aggregate put into take out after above-mentioned pretreated water slurry body stirs 2min, in relative humidity 90 ± 5%, maintenance is 2 days under 20 ± 3 ℃ of conditions of temperature, and is stand-by;
2. the preparation of light aggregate concrete: high strength lightweight aggregate concrete, to form by pretreated light-weight aggregate, cement, fine aggregate, silicon ash, water reducer FDN, water, the each component weight part is:
Pretreated light-weight aggregate 3.00, cement 2.90, river sand 3.80, silicon ash 0.15, naphthalene sulfonic salt FDN series of high efficiency water reducer (cement consumption %) 0.8, water 1 stir above-mentioned component and make slurry, promptly get product.
Embodiment 4: the preparation method of high strength lightweight aggregate concrete, realized by following steps:
1. the pre-treatment of light-weight aggregate: a). the preparation of pretreated water slurry body, the pretreated water slurry body is made up of cement, flyash, water-soluble polypropylene yogurt liquid, naphthalene sulfonic salt FDN series of high efficiency water reducer, water, and the each component weight part is:
Cement 1.8, flyash 0.35, water-soluble polypropylene yogurt liquid (cement consumption %) 12, water reducer FDN (cement consumption %) 0.5, water 1 stir above-mentioned component and make the pretreated water slurry body;
B). light-weight aggregate put into take out after above-mentioned pretreated water slurry body stirs 1min, in relative humidity 90 ± 5%, maintenance is 1 day under 20 ± 3 ℃ of conditions of temperature, and is stand-by;
2. the preparation of light aggregate concrete: high strength lightweight aggregate concrete, to form by pretreated light-weight aggregate, cement, fine aggregate, silicon ash, water reducer FDN, water, the each component weight part is:
Pretreated light-weight aggregate 3.20, cement 3.40, machine-processed sand 3.85, silicon ash 0.32, naphthalene sulfonic salt FDN series of high efficiency water reducer (cement consumption %) 1.2, water 1 stir above-mentioned component and make slurry, promptly get product.
Claims (3)
1. the preparation method of high strength lightweight aggregate concrete is characterized in that: realized by following steps: 1). the pre-treatment of light-weight aggregate, described light-weight aggregate particle diameter 5-20mm, apparent density 1200-1500kg/m3, tap density 700-1100kg/m3, cylindrical compress strength 3-8Mpa;
A). the preparation of pretreated water slurry body, pretreated water slurry body cement, super fine powder additives, water-soluble polypropylene yogurt liquid, naphthalene sulfonic salt formaldehyde condensation products series water reducer, water are formed, and the each component weight part is:
Water 1, cement 1.35～1.80, super fine powder additives 0.10～0.50, water-soluble polypropylene yogurt liquid, in cement consumption percentage ratio 8～15, naphthalene sulfonic salt formaldehyde condensation products series water reducer, in cement consumption percentage ratio 0.3～0.5, above-mentioned component stirred make the pretreated water slurry body;
B). light-weight aggregate put into take out after above-mentioned pretreated water slurry body stirs 1～3min, in relative humidity 90 ± 5%, maintenance is 1～3 day under 20 ± 3 ℃ of conditions of temperature, and is stand-by;
Described super fine powder additives is wherein a kind of or two kinds of mixing of silicon ash or superfined flyash;
2). the preparation of light aggregate concrete: high strength lightweight aggregate concrete, form by pretreated light-weight aggregate, cement, fine aggregate, silicon ash, naphthalene sulfonic salt formaldehyde condensation products series water reducer, water, wherein fine aggregate is a sand, above-mentioned each component weight part is:
Water 1, pretreated light-weight aggregate 3.00～3.50, cement 2.90～3.50, fine aggregate 3.80～3.95, silicon ash 0.15～0.40, naphthalene sulfonic salt formaldehyde condensation products series water reducer, in cement consumption percentage ratio 0.8～1.4, above-mentioned component stirred make slurry, promptly get product.
2. the preparation method of high strength lightweight aggregate concrete according to claim 1 is characterized in that: described pretreated water slurry body, and each component optimum weight part is:
Cement 1.35, silicon ash 0.17, superfined flyash 0.33,
Water-soluble polypropylene yogurt liquid is in cement consumption percentage ratio 10, naphthalene sulfonic salt formaldehyde condensation products series water reducer, in cement consumption percentage ratio 0.4, water 1.
3. the preparation method of high strength lightweight aggregate concrete according to claim 1 is characterized in that: described high strength lightweight aggregate concrete, and each component optimum weight part is:
Pretreated light-weight aggregate 3.36, cement 3.2, fine aggregate 3.94, silicon ash 0.32, naphthalene sulfonic salt formaldehyde condensation products series water reducer are in cement consumption percentage ratio 1.2, water 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031253105A CN1203023C (en) | 2003-08-22 | 2003-08-22 | Process for preparing high-strength light aggregate concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031253105A CN1203023C (en) | 2003-08-22 | 2003-08-22 | Process for preparing high-strength light aggregate concrete |
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|---|---|
| CN1491917A CN1491917A (en) | 2004-04-28 |
| CN1203023C true CN1203023C (en) | 2005-05-25 |
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|---|---|---|---|
| CNB031253105A Expired - Fee Related CN1203023C (en) | 2003-08-22 | 2003-08-22 | Process for preparing high-strength light aggregate concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111410471A (en) * | 2019-11-16 | 2020-07-14 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Large-flow-state high-strength lightweight aggregate concrete and preparation method thereof |
Families Citing this family (11)
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|---|---|---|---|---|
| CN100347446C (en) * | 2005-01-07 | 2007-11-07 | 李始烈 | Lightweight concrete pumping method and device |
| CN100354224C (en) * | 2005-01-07 | 2007-12-12 | 武汉理工大学 | Water release factor for controlling after expansion capacity of closed concrete and its preparation and use |
| CN101134346B (en) * | 2007-08-31 | 2010-05-19 | 武汉理工大学 | Method of producing pump-transporting light aggregate concrete |
| CN101172820B (en) * | 2007-10-25 | 2010-04-14 | 武汉理工大学 | Method for producing high-strength high damping concrete |
| CN102875181A (en) * | 2012-04-06 | 2013-01-16 | 中国电力科学研究院 | Expanded Polystyrene (EPS) light aggregate concrete and preparation method thereof |
| CN102733536A (en) * | 2012-07-06 | 2012-10-17 | 杭州固华复合材料科技有限公司 | Novel composite insulating thin-wall external wall board and manufacturing method thereof |
| CN104594588A (en) * | 2015-01-13 | 2015-05-06 | 南安市国高建材科技有限公司 | Novel composite thermal insulation thin-wall exterior wall board |
| CN108585571A (en) * | 2018-05-09 | 2018-09-28 | 内蒙古科技大学 | A kind of aggregate processing method improving ion penetration resistance of concrete |
| CN109437730A (en) * | 2018-11-05 | 2019-03-08 | 东莞市爱思宝节能科技有限公司 | Build aggregate and preparation method thereof and its application |
| CN109503067B (en) * | 2018-11-19 | 2021-02-02 | 青岛崇置混凝土工程有限公司 | Light aggregate concrete and preparation method thereof |
| CN110981363B (en) * | 2019-12-25 | 2021-11-19 | 泸州临港思源混凝土有限公司 | Preparation method and pumping process of high-strength lightweight aggregate concrete |
-
2003
- 2003-08-22 CN CNB031253105A patent/CN1203023C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111410471A (en) * | 2019-11-16 | 2020-07-14 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Large-flow-state high-strength lightweight aggregate concrete and preparation method thereof |
| CN111410471B (en) * | 2019-11-16 | 2022-07-29 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Large-flow-state high-strength lightweight aggregate concrete and preparation method thereof |
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|---|---|
| CN1491917A (en) | 2004-04-28 |
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