CN103979872B - A kind of preparation method of the U-shaped channel of the long lightweight precast concrete of 2m - Google Patents
A kind of preparation method of the U-shaped channel of the long lightweight precast concrete of 2m Download PDFInfo
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- CN103979872B CN103979872B CN201410198526.5A CN201410198526A CN103979872B CN 103979872 B CN103979872 B CN 103979872B CN 201410198526 A CN201410198526 A CN 201410198526A CN 103979872 B CN103979872 B CN 103979872B
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Abstract
A kind of preparation method of the U-shaped channel of the long lightweight precast concrete of 2m, the preparation method that the present invention relates to a kind of 2m U-shaped channel of long lightweight precast concrete, it to solve that the precast concrete U-shaped channel comprcssive strength that existing preparation method obtains is low, anti-freezing property is poor, sound pollution is serious and can only the problem that produces of fixed-point type. Preparation method: one, preparation raw material; Two, the agitated uniform after-pouring of raw material is to being placed in the U-shaped channel mould on level ground, obtains the U-shaped channel of molding; Three, the U-shaped channel mould being loaded with the U-shaped channel of molding is transported in maintenance place, completes maintenance; Four, the U-shaped channel completing maintenance is carried out demoulding process, complete U-shaped channel and prepare. The present invention adopts reactive powder self-compacting concrete, has mould, the feature of without vibration of being automatically full of, decreases sound pollution during production and the channel smooth surface produced, and bubble is few, without honeycomb, hole etc. The present invention is for the preparation of the 2m U-shaped channel of long lightweight precast concrete.
Description
Technical field
The preparation method that the present invention relates to a kind of 2m U-shaped channel of long lightweight precast concrete.
Background technology
China with account for the freshwater resources in the world 6%, 9% arable land, solve the food problem accounting for the world 21% population, irrigation and water conservancy has played vital effect.
In recent years, central authorities adhere to using construction of water conservancy works as the important foundation ensureing agricultural stable development and national food security, continuous perfect policies support system, strengthen work in every dynamics, promote irrigation and water conservancy to enter new developmental stage. Within 2012, start provinces and regions, northeast four " water saving increases wholesale grain store and moves ", but to field, this " last one kilometer " is the weakest link of irrigation and water conservancy below branch canal, the problems such as ubiquity standard difference low, supporting, aging in bad repair and benefit decay, farm field irrigation drainage " last one kilometer " problem becomes increasingly conspicuous.
Along with country's attention to irrigation and water conservancy, construction of water conservancy works engineering gets more and more; The existing mode of production adopts the production technology of normal concrete vibratory compaction to prepare the U-shaped channel of precast concrete, product comprcssive strength is only 25MPa, frost resistance is only 100 times, and in production process, noise is big, and can only produce by fixed-point type, therefore, need a kind of preparation method, it is ensured that product quality, reduce sound pollution, portable production, meets engineering demand.
Summary of the invention
The invention aims to solve the precast concrete U-shaped channel comprcssive strength that existing preparation method obtains is low, anti-freezing property is poor, sound pollution is serious and can only the problem that produces of fixed-point type, and provide a kind of 2m preparation method of the U-shaped channel of long lightweight precast concrete.
The preparation method of the U-shaped channel of the long lightweight precast concrete of a kind of 2m of the present invention realizes according to the following steps:
One, 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% additive, 0.2%～0.3% steel fibre and 7%～8% water are weighed by mass percentage as raw material;
Two, the raw material that step one weighs is joined in blender, be directly poured in the U-shaped channel mould being placed on level ground after stirring 2 minutes, obtain the 2m U-shaped channel of long light concrete of molding;
Three, the U-shaped channel mould of long for the 2m the being loaded with molding U-shaped channel of 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: first at room temperature quiet stop 4h, then pass to steam, the time passing into steam is 6h, the temperature in maintenance space that keeps for the 1st hour passing into steam is 45 DEG C, the temperature in maintenance space that keeps for the 2nd hour passing into steam is 60 DEG C, and keeping temperature in maintenance space after passing into the 3rd hour of steam is 75 DEG C; Open airtight maintenance space after stopping logical steam for 0.5 hour one jiao, then fully open airtight maintenance space after waiting 0.5 hour, complete whole maintenance processes, obtain the 2m U-shaped channel of long light concrete of maintenance;
Four, the 2m the completing maintenance U-shaped channel of long light concrete is carried out demoulding process, complete the preparation of the 2m U-shaped channel of long lightweight precast concrete.
Beneficial effects of the present invention:
1, adopting the U-shaped channel comprcssive strength of the long lightweight precast concrete of 2m prepared by the present invention more than 50MPa, frost resistance is more than 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 that the present invention uses when producing the U-shaped channel of the long lightweight precast concrete of 2m, has mould, the feature of without vibration of being automatically full of, decrease sound pollution during production, and the channel smooth surface produced, bubble is few, without honeycomb, hole etc.
3, the present invention is not by the restriction of production site, can follow project site at any time and convert, it is achieved the portable mode of production, can improve at any time or reduce yield, improve production efficiency, reduce waste.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the 2m U-shaped channel of long lightweight precast concrete that step 4 of the present invention prepares;
Fig. 2 is the end view of the 2m U-shaped channel of long lightweight precast concrete that step 4 of the present invention prepares.
Detailed description of the invention
Detailed description of the invention one: the preparation method of the U-shaped channel of the long lightweight precast concrete of a kind of 2m of present embodiment realizes according to the following steps:
One, 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% additive, 0.2%～0.3% steel fibre and 7%～8% water are weighed by mass percentage as raw material;
Two, the raw material that step one weighs is joined in blender, be directly poured in the U-shaped channel mould being placed on level ground after stirring 2 minutes, obtain the 2m U-shaped channel of long light concrete of molding;
Three, the U-shaped channel mould of long for the 2m the being loaded with molding U-shaped channel of 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: first at room temperature quiet stop 4h, then passing to steam, the time passing into steam is 6h, and wherein within the 1st hour, keeping temperature in maintenance space is 45 DEG C, within 2nd hour, keeping temperature in maintenance space is 60 DEG C, and keeping temperature in maintenance space after the 3rd hour is 75 DEG C;Open airtight maintenance space after stopping logical steam for 0.5 hour one jiao, then fully open airtight maintenance space after waiting 0.5 hour, complete whole maintenance processes, obtain the 2m U-shaped channel of long light concrete of maintenance;
Four, the 2m the completing maintenance U-shaped channel of long light concrete is carried out demoulding process, complete the preparation of the 2m U-shaped channel of long lightweight precast concrete;
Described stone is 5mm～20mm continuous grading, and the modulus of fineness of described sand is 2.1.
The room temperature described in production technology of the U-shaped channel of the long lightweight precast concrete of present embodiment 2m is 20 DEG C.
The production technology of the U-shaped channel of the long lightweight precast concrete of present embodiment 2m mainly through choosing applicable raw material, dispensing stirring, build to steps such as mould, steam curing, dismounting moulds and complete, the mix-design of reactive powder self-compacting concrete is carried out after wherein choosing applicable raw material, according to raw-material Mass adjust-ment match ratio, thus reaching to ensure that production is smoothed out, product quality meets the target of design standard.
Adopting the U-shaped channel comprcssive strength of the long lightweight precast concrete of 2m prepared by present embodiment more than 50MPa, frost resistance is more than 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 uses when producing the U-shaped channel of the long lightweight precast concrete of 2m, has mould, the feature of without vibration of being automatically full of, decrease sound pollution during production, and the channel smooth surface produced, bubble is few, without honeycomb, hole etc.
Present embodiment by the restriction of production site, can not followed project site at any time and convert, it is achieved the portable mode of production, can improve at any time or reduce yield, improve production efficiency, reduce waste.
Detailed description of the invention two: present embodiment and detailed description of the invention one are numbered PO425 the difference is that cement described in step one. Other step and parameter and detailed description of the invention one are identical.
Detailed description of the invention three: present embodiment and detailed description of the invention one or two are I grade the difference is that the rank of the flyash described in step one. Other step and parameter and detailed description of the invention one or two are identical.
Detailed description of the invention four: one of present embodiment and detailed description of the invention one to three are 10mm～12mm the difference is that the length of the steel fibre described in step one. Other step and one of parameter and detailed description of the invention one to three are identical.
Detailed description of the invention five: one of present embodiment and detailed description of the invention one to four are made up of water reducer, air entraining agent, suspending agent and thickening agent the difference is that the additive described in step one. Other step and one of parameter and detailed description of the invention one to four are identical.
Detailed description of the invention six: the 2m U-shaped channel of long lightweight precast concrete that present embodiment and detailed description of the invention one obtain the difference is that step 4 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 forms U-shaped cross section diagonally downward along 1-1, the bottom in U-shaped cross section is parallel to horizontal plane, end face at the U-shaped channel two ends of the long lightweight precast concrete of 2m is equipped with U-shaped watertight rubber groove 3, and the length of the U-shaped channel of the long lightweight precast concrete of 2m is 2000mm.
The interior of present embodiment two side forms U-shaped cross section diagonally downward along 1-1, and wherein the interior angle α along 1-1 Yu vertical of sidewall is 2.3 °.
Embodiment one: the preparation method of the U-shaped channel of the long lightweight precast concrete of a kind of 2m of this enforcement realizes according to the following steps:
One, 906KG stone, 819KG sand, 325KG cement 125KG flyash, 50KG breeze, 5KG silica flour, 10KG additive, 5KG steel fibre and 175KG water are weighed as raw material;
Two, the raw material that step one weighs is joined in blender, be directly poured in the U-shaped channel mould being placed on level ground after stirring 2 minutes, obtain the 2m U-shaped channel of long light concrete of molding;
Three, the U-shaped channel mould of long for the 2m the being loaded with molding U-shaped channel of 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: first at room temperature quiet stop 4h, then passing to steam, the time passing into steam is 6h, and wherein within the 1st hour, keeping temperature in maintenance space is 45 DEG C, within 2nd hour, keeping temperature in maintenance space is 60 DEG C, and keeping temperature in maintenance space after the 3rd hour is 75 DEG C; Open airtight maintenance space after stopping logical steam for 0.5 hour one jiao, then fully open airtight maintenance space after waiting 0.5 hour, complete whole maintenance processes, obtain the 2m U-shaped channel of long light concrete of maintenance;
Four, the 2m the completing maintenance U-shaped channel of long light concrete is carried out demoulding process, complete the preparation of the 2m U-shaped channel of long lightweight precast concrete.
U-shaped channel mould selected by the present embodiment is of a size of 400*400*2000mm, the length of mould is 2000mm, the 2m U-shaped channel of long lightweight precast concrete that the demoulding obtains transports finished product district piling after quality inspection, packing and deposits, the comprcssive strength of the U-shaped channel of the long lightweight precast concrete of product 2m reaches more than 50MPa, and concrete parameters reaches C50F300 level (SL352-2006 concrete for hydraulic structure testing regulations).
Claims (5)
1. the preparation method of the 2m U-shaped channel of long lightweight precast concrete, it is characterised in that the preparation method of the U-shaped channel of the long lightweight precast concrete of 2m realizes according to the following steps:
One, 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% additive, 0.2%～0.3% steel fibre and 7%～8% water are weighed by mass percentage as raw material;
Two, the raw material that step one weighs is joined in blender, be directly poured in the U-shaped channel mould being placed on level ground after stirring 2 minutes, obtain the 2m U-shaped channel of long light concrete of molding;
Three, the U-shaped channel mould of long for the 2m the being loaded with molding U-shaped channel of 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: first at room temperature quiet stop 4h, then pass to steam, the time passing into steam is 6h, the temperature in maintenance space that keeps for the 1st hour passing into steam is 45 DEG C, the temperature in maintenance space that keeps for the 2nd hour passing into steam is 60 DEG C, and keeping temperature in maintenance space after passing into the 3rd hour of steam is 75 DEG C; Open airtight maintenance space after stopping logical steam for 0.5 hour one jiao, then fully open airtight maintenance space after waiting 0.5 hour, complete whole maintenance processes, obtain the 2m U-shaped channel of long light concrete of maintenance;
Four, the 2m the completing maintenance U-shaped channel of long light concrete is carried out demoulding process, complete the preparation of the 2m U-shaped channel of long lightweight precast concrete;
The 2m U-shaped channel of long lightweight precast concrete 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 forms U-shaped cross section diagonally downward, the bottom in U-shaped cross section is parallel to horizontal plane, end face at the U-shaped channel two ends of the long lightweight precast concrete of 2m is equipped with U-shaped watertight rubber groove (3), and the length of the U-shaped channel of the long lightweight precast concrete of 2m is 2000mm; The interior edge (1-1) of the long lightweight precast concrete of the 2m U-shaped channel two side that described step 4 obtains forms U-shaped cross section diagonally downward, and wherein the interior edge (1-1) of sidewall and the angle α of vertical are 2.3 °.
2. the preparation method of a kind of 2m according to claim 1 U-shaped channel of long lightweight precast concrete, it is characterised in that cement described in step one be numbered PO42.5.
3. the preparation method of a kind of 2m according to claim 1 U-shaped channel of long lightweight precast concrete, it is characterised in that the rank of the flyash described in step one is I grade.
4. the preparation method of a kind of 2m according to claim 1 U-shaped channel of long lightweight precast concrete, it is characterised in that the length of the steel fibre described in step one is 10mm～12mm.
5. the preparation method of a kind of 2m according to claim 1 U-shaped channel of long lightweight precast concrete, it is characterised in that the additive described in step one is made up of water reducer, air entraining agent, suspending agent and thickening agent.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN106007530B (en) * | 2016-05-25 | 2018-08-10 | 句容联众科技开发有限公司 | Frost-resistant concrete |
| 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 |
| 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 |
| 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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| CN103224356A (en) * | 2013-02-07 | 2013-07-31 | 黄贺明 | Green environmentally-friendly powder reinforced concrete water delivery pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56149361A (en) * | 1980-04-15 | 1981-11-19 | Matsushita Electric Works Ltd | Manufacture of fiber reinforced cement product |
| CZ2010855A3 (en) * | 2010-11-23 | 2012-05-30 | Rázl@Ivan | Cement composites resistant to acids and high temperature values and process for preparing thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2154870Y (en) * | 1992-03-09 | 1994-02-02 | 梁觉明 | U-shape section concrete channel prefabricated components |
| CN1451626A (en) * | 2002-04-17 | 2003-10-29 | 杨果林 | High strength steel fibre concrete and making method thereof |
| CN101818504A (en) * | 2009-11-06 | 2010-09-01 | 长江大学 | The manufacture method of a kind of manhole cover or water drain grid cover |
| CN103224356A (en) * | 2013-02-07 | 2013-07-31 | 黄贺明 | Green environmentally-friendly powder reinforced concrete water delivery pipe |
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