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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- pretreated
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- Expired - Fee Related
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- 239000004567 concrete Substances 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 91
- 239000004568 cement Substances 0.000 claims abstract description 71
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 35
- 239000002002 slurry Substances 0.000 claims abstract description 33
- 238000002360 preparation method Methods 0.000 claims abstract description 27
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 229910021487 silica fume Inorganic materials 0.000 claims abstract 6
- 229920002125 Sokalan® Polymers 0.000 claims abstract 4
- 239000000839 emulsion Substances 0.000 claims abstract 4
- 239000004584 polyacrylic acid Substances 0.000 claims abstract 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 239000010881 fly ash Substances 0.000 claims description 13
- 239000004576 sand Substances 0.000 claims description 12
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 claims 6
- 238000005086 pumping Methods 0.000 abstract description 12
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 239000002956 ash Substances 0.000 description 25
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 23
- 239000010703 silicon Substances 0.000 description 23
- 229910052710 silicon Inorganic materials 0.000 description 23
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 18
- 239000004743 Polypropylene Substances 0.000 description 12
- 239000007788 liquid Substances 0.000 description 12
- -1 polypropylene Polymers 0.000 description 12
- 229920001155 polypropylene Polymers 0.000 description 12
- 150000003839 salts Chemical class 0.000 description 12
- 235000013618 yogurt Nutrition 0.000 description 12
- 238000010276 construction Methods 0.000 description 9
- 239000007859 condensation product Substances 0.000 description 6
- 238000002203 pretreatment Methods 0.000 description 6
- 239000008187 granular material Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000003469 silicate cement Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
本发明涉及一种轻集料混凝土的制备方法。高强轻集料混凝土的制备方法，其特征是：由如下步骤实现：1)轻集料的预处理：a)预处理水泥浆体的准备，预处理水泥浆体由水泥、超细掺合料、水溶性聚丙烯酸乳液、减水剂FDN、水组成；b)把轻集料放入上述预处理水泥浆体中搅拌1～3min后取出，在相对湿度90±5%，温度20±3℃条件下养护1～3天，待用；2)轻集料混凝土的制备：高强轻集料混凝土，由预处理后的轻集料、水泥、细集料、硅灰、减水剂FDN、水组成；按比例搅拌均匀制成浆体，即得产品。它能够有效提高轻集料颗粒强度、降低吸水率，显著增加轻集料混凝土强度和改善轻集料混凝土泵送施工性能。The invention relates to a preparation method of light aggregate concrete. The preparation method of high-strength lightweight aggregate concrete is characterized in that: it is realized by the following steps: 1) pretreatment of light aggregate: a) preparation of pretreated cement slurry, which is composed of cement, superfine admixture , Water-soluble polyacrylic acid emulsion, water reducing agent FDN, water; b) Put the light aggregate into the above pretreated cement slurry and stir for 1-3 minutes, then take it out, at a relative humidity of 90±5% and a temperature of 20±3°C 2) Preparation of lightweight aggregate concrete: high-strength lightweight aggregate concrete, made of pretreated light aggregate, cement, fine aggregate, silica fume, water reducing agent FDN, water Composition: Stir evenly according to the proportion to make a slurry to obtain the product. It can effectively increase the strength of light aggregate particles, reduce water absorption, significantly increase the strength of light aggregate concrete and improve the pumping performance of 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)
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1491917A CN1491917A (en) | 2004-04-28 |
| CN1203023C true CN1203023C (en) | 2005-05-25 |
Family
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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 | A kind of preparation method of pumping light aggregate concrete |
| CN101172820B (en) * | 2007-10-25 | 2010-04-14 | 武汉理工大学 | Preparation method of high-strength and 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 | Building aggregate, preparation method and application thereof |
| 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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