CN104291758A - Preparation method of structural lightweight aggregate concrete - Google Patents
Preparation method of structural lightweight aggregate concrete Download PDFInfo
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- CN104291758A CN104291758A CN201410551058.5A CN201410551058A CN104291758A CN 104291758 A CN104291758 A CN 104291758A CN 201410551058 A CN201410551058 A CN 201410551058A CN 104291758 A CN104291758 A CN 104291758A
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Abstract
The invention discloses a preparation method of structural lightweight aggregate concrete, aiming at solving the problems that in the prior art, the lightweight aggregate concrete prepared by using the existing lightweight aggregate concrete preparation method is generally large in dry apparent density, low in compressive strength, poor in workability and the like. The preparation method of the lightweight aggregate concrete comprises the following steps: firstly, selecting ceramsites with density grade of 600-900 and the particle size ranging from 5-25mm as a lightweight aggregate for later use; secondly, soaking the lightweight aggregate into cement and natural sand, and evenly stirring; and fourthly, adding a high-performance concrete pumping agent and water for continuously stirring evenly, to obtain the lightweight aggregate concrete. Through the technical scheme, the problems of the prior art can be solved.
Description
Technical field
The present invention relates to building material technical field, be specifically related to a kind of structural lightweight aggregate preparation method of concrete.
Technical field
Concrete is one of contemporary topmost civil engineering material.It is by gelling material, and aggregate and water are prepared by a certain percentage, vibrates shaping, the artificial stone-like material of maintenance under certain condition through stirring.Concrete has abundant raw material, cheap, the simple feature of production technique, and therefore, its usage quantity is increasing; Simultaneously also to have ultimate compression strength high for concrete, and good endurance, strength grade wide ranges, its use range goes out very extensive.Not only use in various civil engineering work, and in shipbuilding, mechanical industry, the exploitation of ocean, in geothermal engineering etc., concrete is also important material.Along with epoch and scientific and technological development, it is more and more that concrete kind also becomes, and lightweight aggregate concrete is one of them.
So-called light skeletal is to alleviate concrete quality and improving the aggregate adopted for the purpose of hot working effect, lightweight aggregate concrete is compared with same intensity grade normal concrete, have that dead load is light, transport and lifting efficiency high, reduce foundation load and improve the features such as structures function, can be widely used in high level, high-rise building, waterwork and long span building.Lightweight aggregate concrete is in the past always based on materials for walls such as insulation, heat insulation little building block and sheet materials at home.But because light skeletal density is little, intensity is low and bibulous property, the problem such as the lightweight aggregate concrete ubiquity dry apparent density that existing lightweight aggregate concrete preparation method prepares is large, ultimate compression strength is low and workability is poor.
Summary of the invention
The object of the invention is the defect overcoming prior art, provides a kind of structural lightweight aggregate preparation method of concrete.
A kind of structural lightweight aggregate preparation method of concrete, comprises the steps:
The first, choosing 600 ~ 900 grades of haydites that particle diameter is 5 ~ 25mm and particle diameter is that 700 ~ 1000 grades of pottery sand of 0 ~ 5mm are for subsequent use as light skeletal;
The second, by haydite 455 ~ 699 parts, pottery 0 ~ 252 part, sand is immersed in water and carries out pre-wetted treatment, pulls out after 1 hour;
3rd, then add cement 400 ~ 530 parts, 0 ~ 100 part, flyash, breeze 0 ~ 100 part, silicon ash 0 ~ 50 part, natural sand 175 ~ 673 parts, Machine-made Sand 0 ~ 275 part in light skeletal after pre-wetted treatment, and stir;
4th, then add high performance concrete pumping agent 7.2 ~ 17.6 parts and 126 ~ 171 parts, water and continue to stir, obtain lightweight aggregate concrete.
Particularly, described cement is the silicate cement, ordinary Portland cement, Portland blast furnace slag cement, Portland pozzolana cement, Portland fly ash cement or the composite Portland cement that define in GB175-2011; Described flyash is the second class powered coal ash defined in GB/T1596-2005, and described breeze is the S75 level breeze defined in GB/T 18046-2008, and described silicon ash is the silicon ash defined in GB/T27690-2011.
More specifically, the lightweight aggregate concrete prepared by this light skeletal preparation method, its dry apparent density is 1550 ~ 1950kg/m
3, mixture initial slump>=200mm, divergence>=500mm, 3 days ultimate compression strength is 20 ~ 45MPa, and 7 days ultimate compression strength is 30 ~ 55MPa, and 28 days ultimate compression strength is 38 ~ 75MPa.
The present invention compared with prior art, has the following advantages:
(1) structural lightweight aggregate that a kind of structural lightweight aggregate preparation method of concrete of the present invention is obtained, workability is good, can be used for pumping construction.
(2) structural lightweight aggregate that a kind of structural lightweight aggregate preparation method of concrete of the present invention is obtained, early strength is high, can save labor force, the reduction of erection time.
(3) structural lightweight aggregate that a kind of structural lightweight aggregate preparation method of concrete of the present invention is obtained, its dry apparent density is less, and ultimate compression strength is higher, therefore, better with the building aseismicity using it to build.
Embodiment
The object of the invention is to the defect overcoming prior art, a kind of structural lightweight aggregate preparation method of concrete is provided, below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
The first, choose density rating is 600 grades, particle diameter is 5 ~ 25mm haydite and density rating be 700 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 528 parts and pottery 106 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add silicate cement 500 parts, natural sand 331 parts in light skeletal after pre-wetted treatment, and stir;
4th, then high performance concrete pumping agent adds 8.5 parts and 150 parts, water continues to stir, and obtains lightweight aggregate concrete.
Embodiment 2
The first, choose density rating is 600 grades, particle diameter is 5 ~ 25mm haydite and density rating be 1000 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 455 parts and pottery 252 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add ordinary Portland cement 500 parts, natural sand 256 parts in light skeletal after pre-wetted treatment;
4th, then add high performance concrete pumping agent 8.0 parts and 160 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 3
The first, choose density rating is 600 grades, particle diameter is 5 ~ 25mm haydite and density rating be 1000 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 479 parts and pottery 162 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add ordinary Portland cement 400 parts, 50 parts, II level flyash, natural sand 183 parts, Machine-made Sand 275 parts in light skeletal after pre-wetted treatment;
4th, then add high performance concrete pumping agent 7.2 parts and 126 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 4
The first, choose density rating is 700 grades, particle diameter is 5 ~ 25mm haydite and density rating be 700 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 460 parts and pottery 155 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add Portland blast furnace slag cement 400 parts, 50 parts, II level flyash, S75 level breeze 50 parts, natural sand 175 parts, Machine-made Sand 263 parts in light skeletal after pre-wetted treatment;
4th, then add high performance concrete pumping agent 8.0 parts and 145 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 5
The first, choose density rating is 700 grades, particle diameter is 5 ~ 25mm haydite and density rating be 700 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 521 parts and pottery 140 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add Portland pozzolana cement 400 parts, 100 parts, II level flyash, natural sand 347 parts in light skeletal after pre-wetted treatment;
4th, then add high performance concrete pumping agent 8.25 parts and 150 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 6
The first, choose density rating is 800 grades, particle diameter is 5 ~ 25mm haydite and density rating be 700 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 521 parts and pottery 157 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add Portland pozzolana cement 400 parts, S75 level breeze 100 parts, natural sand 349 parts in light skeletal after pre-wetted treatment;
4th, then add high performance concrete pumping agent 8.25 parts and 160 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 7
The first, choose the haydite that density rating is 800 grades, particle diameter is 5 ~ 25mm for subsequent use as light skeletal;
The second, haydite 584 parts is immersed in water and carries out pre-wetted treatment, pull out after one hour;
3rd, then add Portland blast furnace slag cement 450 parts, 50 parts, II level flyash, S75 level breeze 50 parts, natural sand 673 parts in light skeletal after pre-wetted treatment;
4th, then add high performance concrete pumping agent 14.85 parts and 171 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 8
The first, choose density rating is 900 grades, particle diameter is 5 ~ 20mm haydite and density rating be 700 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 612 parts and pottery 85 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add Portland pozzolana cement 450 parts, S75 level breeze 50 parts in light skeletal after pre-wetted treatment, silicon ash 50 parts, natural sand 488 parts, Machine-made Sand 248 parts;
4th, then add high performance concrete pumping agent 14.3 parts and 159 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 9
The first, choose density rating is 900 grades, particle diameter is 5 ~ 20mm haydite and density rating be 1000 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 699 parts and pottery 83 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add Portland pozzolana cement 470 parts in light skeletal after pre-wetted treatment, silicon ash 30 parts, 50 parts, II level flyash, natural sand 252 parts, Machine-made Sand 253 parts;
4th, then add high performance concrete pumping agent 9.9 parts and 164 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 10
The first, choose density rating is 900 grades, particle diameter is 5 ~ 20mm haydite and density rating be 1000 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 666 parts and pottery 87 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add Portland fly ash cement 530 parts in light skeletal after pre-wetted treatment, silicon ash 20 parts, natural sand 266 parts, Machine-made Sand 266 parts;
4th, then add high performance concrete pumping agent 14.6 parts and 155 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 11
The first, choose density rating is 900 grades, particle diameter is 5 ~ 20mm haydite and density rating be 1000 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 665 parts and pottery 116 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add Portland fly ash cement 450 parts, 50 parts, II level flyash in light skeletal after pre-wetted treatment, silicon ash 50 parts, natural sand 248 parts, Machine-made Sand 248 parts;
4th, then add high performance concrete pumping agent 14.85 parts and 138 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 12
The first, choose density rating is 900 grades, particle diameter is 5 ~ 20mm haydite and density rating be 1000 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 699 parts and pottery 94 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add composite Portland cement 450 parts, S75 level breeze 50 parts in light skeletal after pre-wetted treatment, silicon ash 50 parts, natural sand 257 parts, Machine-made Sand 257 parts;
4th, then add high performance concrete pumping agent 15.95 parts and 143 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 13
The first, choose density rating is 900 grades, particle diameter is 5 ~ 20mm haydite and density rating be 1000 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 678 parts and pottery 94 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add composite Portland cement 450 parts, 50 parts, II level flyash in light skeletal after pre-wetted treatment, silicon ash 50 parts, natural sand 514 parts;
4th, then add high performance concrete pumping agent 17.6 parts and 143 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 14
The first, choose the haydite that density rating is 800 grades, particle diameter is 5 ~ 20mm for subsequent use as light skeletal;
The second, haydite 385 parts is immersed in water and carries out pre-wetted treatment, pull out after one hour;
3rd, then add ordinary Portland cement 420 parts, natural sand 192 parts in light skeletal after pre-wetted treatment;
4th, then add high performance concrete pumping agent 8.3 parts and 160 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 15
The first, choose the haydite that density rating is 900 grades, particle diameter is 5 ~ 20mm for subsequent use as light skeletal;
The second, haydite 565 parts is immersed in water and carries out pre-wetted treatment, pull out after one hour;
3rd, then add Portland blast furnace slag cement 440 parts, natural sand 652 parts in light skeletal after pre-wetted treatment;
4th, then add high performance concrete pumping agent 13.8 parts and 163 parts, water and continue to stir, obtain lightweight aggregate concrete.
Embodiment 16
The first, choose density rating is 900 grades, particle diameter is 5 ~ 25mm haydite and density rating be 1000 grades, particle diameter is that the pottery sand of 0 ~ 5mm is for subsequent use as light skeletal;
The second, haydite 660 parts and pottery 113 parts, sand are immersed in water and carry out pre-wetted treatment, pull out after one hour;
3rd, then add Portland fly ash cement 448 parts, 47 parts, II level flyash in light skeletal after pre-wetted treatment, silicon ash 45 parts, natural sand 240 parts, Machine-made Sand 243 parts, S75 level breeze 90 parts;
4th, then add high performance concrete pumping agent 14.25 parts and 135 parts, water and continue to stir, obtain lightweight aggregate concrete.
The lightweight aggregate concrete that the present invention makes according to previous process, obtains Partial Physical Property as following table with reference to " lightweight aggregate concrete technology code " (JGJ51-2002) test:
| Embodiment | Divergence/mm | Dry apparent density/kg/m 3 | Initial slump/mm | 3 days ultimate compression strength/MPa | 7 days ultimate compression strength/MPa | 28 days ultimate compression strength/MPa |
| 1 | 600 | 1550 | 240 | 26.8 | 31.4 | 38.8 |
| 2 | 625 | 1560 | 220 | 31.6 | 34.5 | 41.8 |
| 3 | 500 | 1610 | 200 | 26.7 | 35.0 | 42.6 |
| 4 | 520 | 1640 | 230 | 34.6 | 40.8 | 43.0 |
| 5 | 575 | 1610 | 225 | 35.7 | 41.5 | 44.9 |
| 6 | 565 | 1720 | 220 | 31.8 | 40.8 | 48.3 |
| 7 | 545 | 1890 | 215 | 37.6 | 48.2 | 62.0 |
| 8 | 555 | 1820 | 215 | 38.6 | 49.3 | 60.8 |
| 9 | 500 | 1910 | 235 | 35.6 | 47.5 | 60.3 |
| 10 | 620 | 1910 | 255 | 36.5 | 49.6 | 65.3 |
| 11 | 580 | 1920 | 250 | 41.3 | 55.1 | 70.0 |
| 12 | 500 | 1940 | 235 | 44.3 | 53.9 | 75.2 |
| 13 | 525 | 1920 | 240 | 39.5 | 51.8 | 69.8 |
| 14 | 620 | 1670 | 250 | 25.5 | 29.5 | 37.8 |
| 15 | 532 | 1910 | 206 | 35.2 | 42.1 | 59.0 |
| 16 | 560 | 1902 | 252 | 42.5 | 56.7 | 73.0 |
Content of the present invention is not limited to cited by embodiment, and the conversion of those of ordinary skill in the art by reading specification sheets of the present invention to any equivalence that technical solution of the present invention is taked, is claim of the present invention and contains.
Claims (6)
1. a structural lightweight aggregate preparation method of concrete, is characterized in that, preparation process is as follows:
The first, choose density rating 600 ~ 900 grades, haydite that particle size range is 5 ~ 25mm is for subsequent use as light skeletal;
The second, light skeletal is immersed in water and carries out pre-wetted treatment, pull out after 1 hour;
3rd, then add cement in light skeletal after pre-wetted treatment, natural sand stirs;
4th, then add high performance concrete pumping agent and water continues to stir, obtain lightweight aggregate concrete.
2. a kind of structural lightweight aggregate preparation method of concrete according to claim 1, it is characterized in that: in described first step, also can add the pottery sand that density rating is 700 ~ 1000, particle diameter is not more than 5mm for subsequent use as light skeletal, in described third step, also can add flyash, breeze, silicon ash and Machine-made Sand.
3. a kind of structural lightweight aggregate preparation method of concrete according to any one of claim 1 ~ 2, it is characterized in that, described cement is the silicate cement, ordinary Portland cement, Portland blast furnace slag cement, Portland pozzolana cement, Portland fly ash cement or the composite Portland cement that define in GB175-2011.
4. a kind of structural lightweight aggregate preparation method of concrete according to claim 2, is characterized in that, described flyash is the second class powered coal ash defined in GB/T1596-2005.
5. a kind of structural lightweight aggregate preparation method of concrete according to claim 2, is characterized in that, described breeze is the S75 level breeze defined in GB/T18046-2008.
6. a kind of structural lightweight aggregate preparation method of concrete according to claim 2, is characterized in that, described silicon ash is the silicon ash defined in GB/T27690-2011.
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| CN105347740A (en) * | 2015-10-29 | 2016-02-24 | 廊坊荣盛混凝土有限公司 | Pumped ceramsite concrete and preparation method thereof |
| CN105523740A (en) * | 2015-01-27 | 2016-04-27 | 山东大学 | Thermal-insulation light concrete material and preparation method thereof |
| CN107043236A (en) * | 2017-04-13 | 2017-08-15 | 天津金隅混凝土有限公司 | A kind of lightweight aggregate concrete and preparation method thereof |
| CN107673693A (en) * | 2017-09-30 | 2018-02-09 | 中交公路长大桥建设国家工程研究中心有限公司 | Suppress the lightweight concrete that aggregate floats |
| CN112110685A (en) * | 2020-09-03 | 2020-12-22 | 武汉鑫云海混凝土有限公司 | LC40 lightweight aggregate concrete and preparation method thereof |
| CN114213149A (en) * | 2022-01-24 | 2022-03-22 | 太原理工大学 | High-water-absorptivity ceramsite lightweight aggregate concrete and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107043236B (en) * | 2017-04-13 | 2020-06-23 | 天津金隅混凝土有限公司 | Lightweight aggregate concrete and preparation method thereof |
| CN107673693A (en) * | 2017-09-30 | 2018-02-09 | 中交公路长大桥建设国家工程研究中心有限公司 | Suppress the lightweight concrete that aggregate floats |
| CN112110685A (en) * | 2020-09-03 | 2020-12-22 | 武汉鑫云海混凝土有限公司 | LC40 lightweight aggregate concrete and preparation method thereof |
| CN114213149A (en) * | 2022-01-24 | 2022-03-22 | 太原理工大学 | High-water-absorptivity ceramsite lightweight aggregate concrete and preparation method thereof |
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Application publication date: 20150121 |