CN103979872A - Preparation method of 2-meter lightweight prefabricated concrete U-shaped channel - Google Patents
Preparation method of 2-meter lightweight prefabricated concrete U-shaped channel Download PDFInfo
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- CN103979872A CN103979872A CN201410198526.5A CN201410198526A CN103979872A CN 103979872 A CN103979872 A CN 103979872A CN 201410198526 A CN201410198526 A CN 201410198526A CN 103979872 A CN103979872 A CN 103979872A
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Abstract
The invention relates to a preparation method of a 2-meter lightweight prefabricate concrete U-shaped channel, and aims to solve the problems that the prefabricated concrete U-shaped channel produced by the conventional preparation method has the disadvantages of low compression strength and bad freezing-resistant property, moreover, the conventional preparation method generates severe noise pollution and can only produce channels in a fixed position. The preparation method comprises the following steps: (1) preparing raw materials; (2) evenly mixing and blending raw materials, casting the mixture into a U-shaped channel mould placed on a flat ground so as to obtain a molded U-shaped channel; (3) transporting the U-shaped channel mould containing the molded U-shaped channel to a maintenance field to carry out a maintenance treatment; (4) carrying out a demoulding treatment on the U-shaped channel which has been subjected to the maintenance treatment so as to obtain a finished product. Active powder is used to self-compact the concrete, the raw materials can automatically fulfill the mould, and thus the stirring and blending are not needed, so the noise pollution during the production process is avoided. Furthermore, the produced channel has the advantages of smooth surface, few bubbles, and no honeycomb or hole. The preparation method is used to prepare 2-meter lightweight prefabricated concrete U-shaped channel.
Description
Technical field
The present invention relates to the preparation method of the long light prefabricated concrete U-type channel of a kind of 2m.
Background technology
China, to account for the Freshwater resources in the world 6%, 9% arable land, solves the food problem of the Liao Zhan world 21% population, and vital effect has been brought into play in farmland water conservancy.
In recent years, central authorities adhere to using construction of water conservancy works as the important foundation that ensures agriculture steady progression and national food safety, constantly perfect policies support system, and increasing work in every dynamics, promotes farmland water conservancy and enters new developmental stage.Within 2012, start four provinces and regions, northeast " it is moving that water saving increases wholesale grain store ", but branch canal is below to field, this " last kilometer " is the weakest link of farmland water conservancy, the problems such as ubiquity standard is low, supporting poor, aging in bad repair and benefit decay, farm field irrigation drainage " last kilometer " problem becomes increasingly conspicuous.
Along with the attention of country to farmland water conservancy, construction of water conservancy works engineering is more and more; The existing mode of production adopts the production technique of normal concrete vibratory compaction to prepare the U-shaped channel of precast concrete, product ultimate compression strength is only 25MPa, frost resistance is only 100 times, and in production process, noise is large, and can only produce by fixed-point type, therefore, need a kind of preparation method, ensure quality product, reduce sound pollution, portable production, meets engineering demand.
Summary of the invention
The object of the invention is the problem in order to solve that the U-shaped channel ultimate compression strength of precast concrete that existing preparation method obtains is low, anti-freezing property is poor, sound pollution is serious and can only fixed-point type to produce, and a kind of 2m preparation method of long light prefabricated concrete U-type channel is provided.
The preparation method of the long light prefabricated concrete U-type channel of a kind of 2m of the present invention realizes according to the following steps:
One, take by mass percentage 37%～40% stone, 33%～35% sand, 13%～15% cement, 5%～6% flyash, 2%～2.5% breeze, 0.2%～0.3% silica flour, 0.4%～0.5% admixture, 0.2%～0.3% steel fiber and 7%～8% water as starting material;
Two, the starting material that step 1 taken join in stirrer, stir after 2 minutes and are directly poured into the U-shaped channel mould being placed on level ground, obtain the U-shaped channel of the long light concrete of 2m of moulding;
Three, the U-shaped channel mould of the U-shaped channel of long 2m that is loaded with moulding light concrete is transported in maintenance place, put into airtight maintenance space, pass into steam to airtight maintenance interior volume and carry out maintenance, maintenance processes is: the first at room temperature quiet 4h that stops, then pass into steam, the time that passes into steam is 6h, pass into the 1st hour of steam keeping temperature in maintenance space is 45 DEG C, pass into the 2nd hour of steam keeping temperature in maintenance space is 60 DEG C, pass into the 3rd hour of steam later in maintenance maintenance space temperature be 75 DEG C; Stop within 0.5 hour, opening one jiao of airtight maintenance space after logical steam, then wait for after 0.5 hour and open airtight maintenance space completely, complete whole maintenance processes, obtained the U-shaped channel of the long light concrete of 2m of maintenance;
Four, the U-shaped channel of the long light concrete of 2m that completes maintenance is carried out to demoulding processing, complete the preparation of the long light prefabricated concrete U-type channel of 2m.
Beneficial effect of the present invention:
1, the long light prefabricated concrete U-type channel ultimate compression strength of 2m that adopts the present invention to prepare exceedes 50MPa, and frost resistance exceedes 300 times.The durability index of the U-shaped channel of common precast concrete is 25MPa, frost resistance 100 times,
2, the reactive powder self-compacting concrete using when the present invention produces the long light prefabricated concrete U-type channel of 2m, has and is automatically full of mould, the feature of without vibration, reduce the sound pollution while production, and the channel smooth surface of producing, bubble is few, without honeycomb, hole etc.
3, the present invention is not subject to the restriction of production site, can follow project site at any time and convert, and realizes the portable mode of production, can improve at any time or reduce output, has improved production efficiency, cuts the waste.
Brief description of the drawings
Fig. 1 is the one-piece construction schematic diagram of the long light prefabricated concrete U-type channel of the 2m for preparing of step 4 of the present invention;
Fig. 2 is the end view of the long light prefabricated concrete U-type channel of the 2m for preparing of step 4 of the present invention.
Embodiment
Embodiment one: the preparation method of the long light prefabricated concrete U-type channel of a kind of 2m of present embodiment realizes according to the following steps:
One, take by mass percentage 37%～40% stone, 33%～35% sand, 13%～15% cement, 5%～6% flyash, 2%～2.5% breeze, 0.2%～0.3% silica flour, 0.4%～0.5% admixture, 0.2%～0.3% steel fiber and 7%～8% water as starting material;
Two, the starting material that step 1 taken join in stirrer, stir after 2 minutes and are directly poured into the U-shaped channel mould being placed on level ground, obtain the U-shaped channel of the long light concrete of 2m of moulding;
Three, the U-shaped channel mould of the U-shaped channel of long 2m that is loaded with moulding light concrete is transported in maintenance place, put into airtight maintenance space, pass into steam to airtight maintenance interior volume and carry out maintenance, maintenance processes is: the first at room temperature quiet 4h that stops, then pass into steam, the time that passes into steam is 6h, and wherein within the 1st hour, keeping temperature in maintenance space is 45 DEG C, within the 2nd hour, keeping temperature in maintenance space is 60 DEG C, and within the 3rd hour, keep temperature in maintenance space is 75 DEG C later; Stop within 0.5 hour, opening one jiao of airtight maintenance space after logical steam, then wait for after 0.5 hour and open airtight maintenance space completely, complete whole maintenance processes, obtained the U-shaped channel of the long light concrete of 2m of maintenance;
Four, the U-shaped channel of the long light concrete of 2m that completes maintenance is carried out to demoulding processing, complete the preparation of the long light prefabricated concrete U-type channel of 2m;
Described stone is 5mm～20mm continuous grading, and the fineness modulus of described sand is 2.1.
Room temperature described in the production technique of the long light prefabricated concrete U-type channel of present embodiment 2m is 20 DEG C.
The production technique of the long light prefabricated concrete U-type channel of present embodiment 2m mainly stirs by choosing applicable starting material, batching, build to steps such as mould, vapor cure, dismounting moulds and complete, wherein choose the mix-design that will carry out reactive powder self-compacting concrete after applicable starting material, adjust proportioning according to raw-material quality, carry out smoothly thereby reach to ensure to produce, quality product meets the target of standard.
The long light prefabricated concrete U-type channel ultimate compression strength of 2m that adopts present embodiment to prepare exceedes 50MPa, and frost resistance exceedes 300 times.The durability index of the U-shaped channel of common precast concrete is 25MPa, frost resistance 100 times,
The reactive powder self-compacting concrete that present embodiment is used while producing the long light prefabricated concrete U-type channel of 2m, has and is automatically full of mould, the feature of without vibration, reduce the sound pollution while production, and the channel smooth surface of producing, bubble is few, without honeycomb, hole etc.
Present embodiment is not subject to the restriction of production site, can follow project site at any time and convert, and realizes the portable mode of production, can improve at any time or reduce output, has improved production efficiency, cuts the waste.
Embodiment two: described in step 1 that what present embodiment was different from embodiment one is, the label of cement is PO425.Other step and parameter are identical with embodiment one.
Embodiment three: the rank of what present embodiment was different from embodiment one or two the is flyash described in step 1 is I level.Other step and parameter are identical with embodiment one or two.
Embodiment four: the length of what present embodiment was different from one of embodiment one to three the is steel fiber described in step 1 is 10mm～12mm.Other step and parameter are identical with one of embodiment one to three.
Embodiment five: what present embodiment was different from one of embodiment one to four is that the admixture described in step 1 is made up of water reducer, air entrapment agent, suspension agent and thickening material.Other step and parameter are identical with one of embodiment one to four.
Embodiment six: what present embodiment was different from embodiment one is that the long light prefabricated concrete U-type channel of 2m that step 4 obtains is linked into an integrated entity by two side 1 and bottom land 2, the outer 1-2 of two side 1 is perpendicular to horizontal plane, the interior of two side is tilted to lower formation U-shaped cross section along 1-1, the bottom in U-shaped cross section is parallel to horizontal plane, end face at the long light prefabricated concrete U-type channel of 2m two ends is equipped with U-shaped watertight rubber groove 3, and the length of the long light prefabricated concrete U-type channel of 2m is 2000mm.
The interior of present embodiment two side is tilted to lower formation U-shaped cross section along 1-1, and wherein the interior angle α along 1-1 and vertical of sidewall is 2.3 °.
Embodiment mono-: this preparation method who implements the long light prefabricated concrete U-type channel of a kind of 2m realizes according to the following steps:
One, take 906KG stone, 819KG sand, 325KG cement 125KG flyash, 50KG breeze, 5KG silica flour, 10KG admixture, 5KG steel fiber and 175KG water as raw material;
Two, the starting material that step 1 taken join in stirrer, stir after 2 minutes and are directly poured into the U-shaped channel mould being placed on level ground, obtain the U-shaped channel of the long light concrete of 2m of moulding;
Three, the U-shaped channel mould of the U-shaped channel of long 2m that is loaded with moulding light concrete is transported in maintenance place, put into airtight maintenance space, pass into steam to airtight maintenance interior volume and carry out maintenance, maintenance processes is: the first at room temperature quiet 4h that stops, then pass into steam, the time that passes into steam is 6h, and wherein within the 1st hour, keeping temperature in maintenance space is 45 DEG C, within the 2nd hour, keeping temperature in maintenance space is 60 DEG C, and within the 3rd hour, keep temperature in maintenance space is 75 DEG C later; Stop within 0.5 hour, opening one jiao of airtight maintenance space after logical steam, then wait for after 0.5 hour and open airtight maintenance space completely, complete whole maintenance processes, obtained the U-shaped channel of the long light concrete of 2m of maintenance;
Four, the U-shaped channel of the long light concrete of 2m that completes maintenance is carried out to demoulding processing, complete the preparation of the long light prefabricated concrete U-type channel of 2m.
The selected U-shaped channel mould of the present embodiment is of a size of 400*400*2000mm, the length of mould is 2000mm, the long light prefabricated concrete U-type channel of 2m that the demoulding obtains transports finished product district piling and deposits after quality inspection, packing, more than the ultimate compression strength of the long light prefabricated concrete U-type channel of product 2m reaches 50MPa, concrete parameters reaches C50F300 level (SL352-2006 concrete for hydraulic structure testing regulation).
Claims (6)
1. a preparation method for the long light prefabricated concrete U-type channel of 2m, is characterized in that the preparation method of the long light prefabricated concrete U-type channel of 2m realizes according to the following steps:
One, take by mass percentage 37%～40% stone, 33%～35% sand, 13%～15% cement, 5%～6% flyash, 2%～2.5% breeze, 0.2%～0.3% silica flour, 0.4%～0.5% admixture, 0.2%～0.3% steel fiber and 7%～8% water as starting material;
Two, the starting material that step 1 taken join in stirrer, stir after 2 minutes and are directly poured into the U-shaped channel mould being placed on level ground, obtain the U-shaped channel of the long light concrete of 2m of moulding;
Three, the U-shaped channel mould of the U-shaped channel of long 2m that is loaded with moulding light concrete is transported in maintenance place, put into airtight maintenance space, pass into steam to airtight maintenance interior volume and carry out maintenance, maintenance processes is: the first at room temperature quiet 4h that stops, then pass into steam, the time that passes into steam is 6h, pass into the 1st hour of steam keeping temperature in maintenance space is 45 DEG C, pass into the 2nd hour of steam keeping temperature in maintenance space is 60 DEG C, pass into the 3rd hour of steam later in maintenance maintenance space temperature be 75 DEG C; Stop within 0.5 hour, opening one jiao of airtight maintenance space after logical steam, then wait for after 0.5 hour and open airtight maintenance space completely, complete whole maintenance processes, obtained the U-shaped channel of the long light concrete of 2m of maintenance;
Four, the U-shaped channel of the long light concrete of 2m that completes maintenance is carried out to demoulding processing, complete the preparation of the long light prefabricated concrete U-type channel of 2m.
2. the preparation method of the long light prefabricated concrete U-type channel of a kind of 2m according to claim 1, is characterized in that the label of cement is PO425 described in step 1.
3. the preparation method of the long light prefabricated concrete U-type channel of a kind of 2m according to claim 1, the rank that it is characterized in that the flyash described in step 1 is I level.
4. the preparation method of the long light prefabricated concrete U-type channel of a kind of 2m according to claim 1, the length that it is characterized in that the steel fiber described in step 1 is 10mm～12mm.
5. the preparation method of the long light prefabricated concrete U-type channel of a kind of 2m according to claim 1, is characterized in that the admixture described in step 1 is made up of water reducer, air entrapment agent, suspension agent and thickening material.
6. the preparation method of the long light prefabricated concrete U-type channel of a kind of 2m according to claim 1, it is characterized in that the long light prefabricated concrete U-type channel of 2m that step 4 obtains is linked into an integrated entity by two side (1) and bottom land (2), the outer (1-2) of two side (1) is perpendicular to horizontal plane, the interior edge (1-1) of two side is tilted to lower formation U-shaped cross section, the bottom in U-shaped cross section is parallel to horizontal plane, end face at the long light prefabricated concrete U-type channel of 2m two ends is equipped with U-shaped watertight rubber groove (3), and the length of the long light prefabricated concrete U-type channel of 2m is 2000mm.
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| CN201410198526.5A CN103979872B (en) | 2014-05-12 | 2014-05-12 | A kind of preparation method of the U-shaped channel of the long lightweight precast concrete of 2m |
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Cited By (9)
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| CN106007530A (en) * | 2016-05-25 | 2016-10-12 | 句容联众科技开发有限公司 | Frost-resistant concrete |
| CN106045424A (en) * | 2016-05-25 | 2016-10-26 | 象州县科学技术局 | Method for producing prefabricated member of concrete ditch by using construction waste |
| CN106087908A (en) * | 2016-06-17 | 2016-11-09 | 新疆金土地水泥制品有限公司 | Assembled channel precast segment |
| CN106495580A (en) * | 2016-10-21 | 2017-03-15 | 长江宜昌航道工程局 | A kind of steel fiber reinforced concrete structure water-permeable frame method for prefabricating |
| CN107471426A (en) * | 2017-08-22 | 2017-12-15 | 潘春光 | A kind of production method of water channel corner prefabricated component |
| CN108503299A (en) * | 2017-02-28 | 2018-09-07 | 北京城泰混凝土制品有限公司 | Strong intensity steel fiber reinforced concrete |
| CN110468685A (en) * | 2019-09-06 | 2019-11-19 | 张进辉 | The joint seal device of U-shaped Prefabricated aqueduct |
| CN110468684A (en) * | 2019-09-06 | 2019-11-19 | 张进辉 | The joint seal device of U-shaped Prefabricated aqueduct |
| CN116572374A (en) * | 2023-06-01 | 2023-08-11 | 广东省水利水电第三工程局有限公司 | Preparation method of hydraulic concrete prefabricated sill assembled component |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007530A (en) * | 2016-05-25 | 2016-10-12 | 句容联众科技开发有限公司 | Frost-resistant concrete |
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| CN106087908A (en) * | 2016-06-17 | 2016-11-09 | 新疆金土地水泥制品有限公司 | Assembled channel precast segment |
| CN106495580A (en) * | 2016-10-21 | 2017-03-15 | 长江宜昌航道工程局 | A kind of steel fiber reinforced concrete structure water-permeable frame method for prefabricating |
| CN106495580B (en) * | 2016-10-21 | 2019-05-28 | 长江宜昌航道工程局 | A kind of steel fiber reinforced concrete structure water-permeable frame method for prefabricating |
| CN108503299A (en) * | 2017-02-28 | 2018-09-07 | 北京城泰混凝土制品有限公司 | Strong intensity steel fiber reinforced concrete |
| CN107471426A (en) * | 2017-08-22 | 2017-12-15 | 潘春光 | A kind of production method of water channel corner prefabricated component |
| CN110468685A (en) * | 2019-09-06 | 2019-11-19 | 张进辉 | The joint seal device of U-shaped Prefabricated aqueduct |
| CN110468684A (en) * | 2019-09-06 | 2019-11-19 | 张进辉 | The joint seal device of U-shaped Prefabricated aqueduct |
| CN116572374A (en) * | 2023-06-01 | 2023-08-11 | 广东省水利水电第三工程局有限公司 | Preparation method of hydraulic concrete prefabricated sill assembled component |
| CN116572374B (en) * | 2023-06-01 | 2024-04-23 | 广东省水利水电第三工程局有限公司 | Preparation method of hydraulic concrete prefabricated sill assembled component |
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