CN102951877A - Manufacturing process for cement concrete product with super early strength and high strength - Google Patents
Manufacturing process for cement concrete product with super early strength and high strength Download PDFInfo
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- CN102951877A CN102951877A CN2012103633613A CN201210363361A CN102951877A CN 102951877 A CN102951877 A CN 102951877A CN 2012103633613 A CN2012103633613 A CN 2012103633613A CN 201210363361 A CN201210363361 A CN 201210363361A CN 102951877 A CN102951877 A CN 102951877A
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Abstract
The invention discloses a manufacturing process for a cement concrete product with super early strength and high strength. The process comprises the following steps of: adding 1 part of cement, 1.826 -1.982 parts of gravels, 1.089-1.225 parts of sand and 0.0075-0.012 part of water reducing agent into a forcing type mixing machine according to the mass parts for mixing uniformly, wherein the gravels are andesite or limestone gravel crude aggregates, the grain diameter of the gravels is less than or equal to 20mm, the sands are river sand fine aggregates, the sand mud containing quantity is less than or equal to 2 percent, the sand rate is 35-40 percent, the water reducing agent is naphthalene effective water reducing agent, and the water reduction efficiency is more than or equal to 20 percent; adding water into the mixture according to water cement ratio; uniformly stirring the mixture; processing the mixture to be cement concretes; manufacturing and forming the cement concretes in a vibration or centrifuging and vibration mode; isolating the manufactured cement product from outside environment and totally sealing the manufactured cement product and the outside environment by a plastic film with high temperature resistance; and putting the manufactured cement product into a steam type curing box or a blowing-type oven to cure for 8-12 hours at the temperature of 75-95 DEG C. The manufacturing process has the advantages that the curing is performed for 8-12 hours to reach more than 60-80 percent of the designed strength, so that a stretch-draw requirement is met, the curing time is greatly shortened, and the cost of the traditional steam curing concrete product is also reduced.
Description
Technical field
The present invention relates to the manufacture craft of cement concrete product, relate in particular to the manufacture craft of the super early strengthening and high strengthening goods of cement concrete.
Background technology
Current, the manufacture craft of China's short-term strength cement goods mainly relies on normal temperature and pressure vapor cure or steam-cured still maintenance, and in these two kinds of traditional technologys, normal temperature and pressure vapor cure can not obtain higher cement concrete product intensity; Steam-cured still maintenance cost is high, and curing time is longer.Along with the develop rapidly of China's economy, the quantity of construction project grows with each passing day, and these engineerings are for the intensity of cement products, and there has been higher requirement Production Time.In addition, conventional high-strength concrete generally all adds the fine mineral admixtures such as flyash or silicon ash, and needs normal curing just can reach design strength in 28 days, and cost is higher, and economic benefit is not remarkable.Therefore, existing cement concrete product technique can't satisfy the demand of modern construction anxiety.
Summary of the invention
The problem that will solve of the present invention provides the manufacture craft of the super early strengthening and high strengthening goods of a kind of cement concrete, to adapt to the demand of modern construction, satisfy the stretch-draw requirement, shorten curing time, make concrete can in 8-12 hour, reach the 60%-80% of design strength, and cost is low.
For addressing the above problem, the technical solution that the present invention takes is:
The manufacture craft of the super early strengthening and high strengthening goods of a kind of cement concrete is characterized in that:
1, according to the mass fraction meter with 0.0075-0.012 part of 1 part of cement, 1.826-1.982 parts of rubbles, sand 1.089-1.225 part and water reducer, add the forced action type mixing machine, even each aggregate blending; Described cement is 425R or 525R short-term strength cement; Described rubble is andesite or limestone gravel coarse aggregate, Sui stone Li Jing＜=20mm; Described sand is river sand fine aggregate, sand Han Ni Liang＜=2%, and sand coarse aggregate ratio is 35%-40%; Described water reducer is naphthalene series high-efficiency water-reducing agent, its diminishing efficient 〉=20%;
2, in gathering materials behind mix, according to water cement ratio 0.23-0.4, add water, stir, be processed into cement concrete;
3, the concrete behind the mix is made moulding by vibration or centrifugal double mode of vibration;
4, with the cement products of making, use the high-temperature resistance plastice film, isolated external environment is totally-enclosed, puts into steam-type maintaining box or blowing-type baking oven, under 75 ℃-95 ℃ temperature, maintenance 8-12 hour.
Described isolated external environment is totally-enclosed, refers to adopt sealed package parcel cement products, makes the not demoulding of cement and wrap up exposed part.
Add water time-division secondary and add, each amount of water is 1/2 of Total Water, so that water fully contacts, infiltrates with cement, increases hydrated cementitious chance and speed, improves the concrete strength rate of rise.
The manufacture craft of the super early strengthening and high strengthening goods of this cement concrete can make cement concrete product intensity reach the 60%-80% of design strength in 8-12 hour, satisfied the stretch-draw requirement, had greatly shortened curing time; And needn't add the fine mineral admixtures such as flyash or silicon ash, maintenance only needs to reach in 8-12 hour the intensity of tension reinforcing steel bar and transportation, compares with traditional method, and product is short curing cycle, boosts productivity and form cycling rate, and cost is low, and cost can reduce 20-30%.
Embodiment
Embodiment 1:
1, design C90 proportioning, according to mass fraction meter cement: rubble: sand=1:1.826:1.089, described cement are the 525R short-term strength cement, described rubble is andesite rubble coarse aggregate, and Sui stone Li Jing＜=20mm, described sand are river sand fine aggregate, sand Han Ni Liang＜=2%, sand coarse aggregate ratio is about 37.5%; Adopt naphthalene series high-efficiency water-reducing agent, volume is 1.2% of cement quality, and its diminishing efficient is 20%; Add the forced action type mixing machine, even each aggregate blending.
2, in gathering materials behind mix, according to the water cement ratio of setting=0.28, minute secondary adds and calculates water, respectively adds 1/2 of Total Water at every turn; Stir, be processed into cement concrete.
3, the concrete behind the mix is made moulding by vibration.
4, with the cement products of making, use the high-temperature resistance plastice film, isolated external environment is totally-enclosed, puts into the blowing-type baking oven, 95 ℃ of curing temperatures, maintenance is 8 hours in the blast heating baking oven.
Through 8 hours maintenance, its intensity was 62Mpa, was 68.889% of design strength.
Embodiment 2:
1, design C65 proportioning, according to ratio of quality and the number of copies cement: rubble: sand=1:1.982:1.089, described cement are the 425R short-term strength cement, described rubble is andesite rubble coarse aggregate, and Sui stone Li Jing＜=20mm, described sand are river sand fine aggregate, the sand silt content is 1.5%, and sand coarse aggregate ratio is about 35.5%; Adopt naphthalene series high-efficiency water-reducing agent, volume is 0.75% of cement quality, and its diminishing efficient is 22%; Add the forced action type mixing machine, even each aggregate blending.
2, in gathering materials behind mix, according to the water cement ratio of setting=0.4, minute secondary adds and calculates water, adds 1/2 of Total Water at every turn; Stir, be processed into cement concrete.
3, the concrete behind the mix is made moulding by centrifugal double mode of vibration.
4, maintenance method is: with the cement products of making, use the high-temperature resistance plastice film, isolated external environment is totally-enclosed, puts into the blowing-type baking oven, 95 ℃ of curing temperatures, and maintenance is 8 hours in the blast heating baking oven.
Through 8 hours maintenance, its intensity was 43.225Mpa, was 61.75% of design strength.
Embodiment 3:
1, design C70 proportioning, according to mass fraction meter cement: rubble: sand=1:1.914:1.157, described cement are the 425R short-term strength cement, described rubble is andesite rubble coarse aggregate, and Sui stone Li Jing＜=20mm, described sand are river sand fine aggregate, the sand silt content is 1%, and sand coarse aggregate ratio is about 37.7%; Adopt naphthalene series high-efficiency water-reducing agent, volume is 1% of cement quality, and its diminishing efficient is 20%; Add the forced action type mixing machine, even each aggregate blending.
2, in gathering materials behind mix, according to the water cement ratio of setting=0.3, minute secondary adds and calculates water, adds 1/2 of Total Water at every turn, stirs, and is processed into cement concrete.
3, the concrete behind the mix is made moulding by mode of vibration.
4, maintenance method is: with the cement products of making, use inorganic material, isolated external environment is totally-enclosed, puts into the steam-type maintaining box, 95 ℃ of curing temperatures, and maintenance is 8 hours in the blast heating baking oven.
Through 8 hours maintenance, its intensity was 54Mpa, was 77.143% of design strength.
Embodiment 4
1, design C70 proportioning, according to mass fraction meter cement: rubble: sand=1:1.909:1.225, described cement are the 425R short-term strength cement, described rubble is the limestone gravel coarse aggregate, and Sui stone Li Jing＜=20mm, described sand are river sand fine aggregate, sand Han Ni Liang＜=2%, sand coarse aggregate ratio is about 39.1%; Adopt naphthalene series high-efficiency water-reducing agent, volume is 1% of cement quality, and its diminishing efficient is 22%; Add the forced action type mixing machine, even each aggregate blending.
2, in gathering materials behind mix, according to the water cement ratio of setting=0.3, minute secondary adds and calculates water, adds 1/2 of Total Water at every turn, stirs, and is processed into cement concrete.
3, the concrete behind the mix is made moulding by mode of vibration.
4, maintenance method is: with the cement products of making, use inorganic material, isolated external environment is totally-enclosed, puts into the blowing-type baking oven, 75 ℃ of curing temperatures, and maintenance is 8 hours in the blast heating baking oven.
Through 8 hours maintenance, its intensity 46.33Mpa was 66.186% of design strength.
Embodiment 5:
1, design C70 proportioning, according to mass fraction meter cement: rubble: sand=1:1.909:1.225, described cement are the 425R short-term strength cement, described rubble is the limestone gravel coarse aggregate, and Sui stone Li Jing＜=20mm, described sand are river sand fine aggregate, sand Han Ni Liang＜=2%, sand coarse aggregate ratio is about 39.1%; Adopt naphthalene series high-efficiency water-reducing agent, volume is 1% of cement quality, and its diminishing efficient is 25%; Add the forced action type mixing machine, even each aggregate blending.
2, in gathering materials behind mix, according to the water cement ratio of setting=0.3, minute secondary adds and calculates water, adds 1/2 of Total Water at every turn, stirs, and is processed into cement concrete.
3, the concrete behind the mix is made moulding by centrifugal double mode of vibration.
4, maintenance method is: with the cement products of making, use inorganic material, isolated external environment is totally-enclosed, puts into the blowing-type baking oven, 85 ℃ of curing temperatures, and maintenance is 8 hours in the blast heating baking oven.
Through 8 hours maintenance, its intensity was 45.5Mpa, was 65% of design strength.
Embodiment 6:
1, design C70 proportioning, according to mass fraction meter cement: rubble: sand=1:1.909:1.225, described cement are the 425R short-term strength cement, described rubble is the limestone gravel coarse aggregate, and Sui stone Li Jing＜=20mm, described sand are river sand fine aggregate, sand Han Ni Liang＜=2%, sand coarse aggregate ratio is 39.1%; Adopt naphthalene series high-efficiency water-reducing agent, volume is 1% of cement quality, and its diminishing efficient is 20%; Add the forced action type mixing machine, even each aggregate blending.
2, in gathering materials behind mix, according to the water cement ratio of setting=0.3, minute secondary adds and calculates water, adds 1/2 of Total Water at every turn, stirs, and is processed into cement concrete.
3, the concrete behind the mix is made moulding by mode of vibration.
4, maintenance method is: with the cement products of making, use inorganic material, isolated external environment is totally-enclosed, puts into the blowing-type maintaining box, 85 ℃ of curing temperatures, and maintenance is 12 hours in the blast heating baking oven.
Through 12 hours maintenance, its intensity was 59.5Mpa, was 85% of design strength.
Embodiment 7:
1, design C70 proportioning, according to mass fraction meter cement: rubble: sand=1:1.909:1.225, described cement are the 525R short-term strength cement, described rubble is the limestone gravel coarse aggregate, Sui stone Li Jing＜=20mm, described sand are river sand fine aggregate, sand Han Ni Liang＜=2%; Adopt naphthalene series high-efficiency water-reducing agent, volume is 1% of cement quality, and its diminishing efficient is 20%; Add the forced action type mixing machine, even each aggregate blending.
2, in gathering materials behind mix, according to the water cement ratio of setting=0.3, minute secondary adds and calculates water, adds 1/2 of Total Water at every turn, stirs, and is processed into cement concrete.
3, the concrete behind the mix is made moulding by mode of vibration.
4, maintenance method is: with the cement products of making, use inorganic material, isolated external environment is totally-enclosed, puts into the blowing-type maintaining box, 85 ℃ of curing temperatures, and maintenance is 10 hours in the blast heating baking oven.
Through 10 hours maintenance, its intensity was 51.5Mpa, was 73.571% of design strength.
Comparative Examples:
1, design C70 proportioning, cement: rubble: sand=1:1.909:1.225, described cement are the 525R short-term strength cement, and rubble is the andesite coarse aggregate, and described sand is river sand fine aggregate, sand Han Ni Liang＜=2%; With water reducer (naphthalene series high-efficiency water-reducing agent), volume is 1% of cement quality, and its diminishing efficient is 20%; Add the forced action type mixing machine, even each aggregate blending.
2, in gathering materials behind mix, according to the water cement ratio of setting=0.3, minute secondary adds and calculates water, adds 1/2 of Total Water at every turn, stirs, and is processed into cement concrete.
3, the concrete behind the mix is made moulding by mode of vibration.
4, maintenance method is: 85 ℃ of temperature, and isolated external environment is totally-enclosed, and maintenance is 10 hours in the blowing-type baking oven, is placed on room temperature and carries out normal curing 28 days.
Through 28 days maintenance, its intensity was 70.67Mpa, was 100.957% of design strength.
The composition of embodiment 1～embodiment 8, maintenance method and compression strength value can be referring to tables 1:
Composition, maintenance method and the compression strength value of table 1 embodiment 1 ~ embodiment 8, Comparative Examples
Concrete strength has reached the 60%-80% of design strength after the process 8-12h maintenance, has satisfied the cyclic production requirement, i.e. the intensity of tension reinforcing steel bar and transportation.
Claims (3)
1. the manufacture craft of the super early strengthening and high strengthening goods of cement concrete is characterized in that:
1.1 with 0.0075-0.012 part of 1 part of cement, 1.826-1.982 parts of rubbles, sand 1.089-1.225 part and water reducer, add the forced action type mixing machine according to the mass fraction meter, even each aggregate blending; Described cement is 425R or 525R short-term strength cement; Described rubble is andesite or limestone gravel coarse aggregate, Sui stone Li Jing＜=20mm; Described sand is river sand fine aggregate, sand Han Ni Liang＜=2%, and sand coarse aggregate ratio is 35%-40%; Described water reducer is naphthalene series high-efficiency water-reducing agent, its diminishing efficient 〉=20%;
1.2 in gathering materials behind mix, according to water cement ratio 0.23-0.4, add water, stir, be processed into cement concrete;
1.3 the concrete behind the mix is made moulding by vibration or centrifugal double mode of vibration formula;
1.4 with the cement products of making, use the high-temperature resistance plastice film, isolated external environment is totally-enclosed, puts into steam-type maintaining box or blowing-type baking oven, under 75 ℃-95 ℃ temperature, and maintenance 8-12 hour.
2. the manufacture craft of the super early strengthening and high strengthening goods of cement concrete according to claim 1, it is characterized in that: described isolated external environment is totally-enclosed, refers to adopt sealed package parcel cement products, makes the not demoulding of cement and wrap up exposed part.
3. the manufacture craft of the super early strengthening and high strengthening goods of cement concrete according to claim 1 is characterized in that: add water time-division secondary and add, each amount of water is 1/2 of Total Water.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496901A (en) * | 2013-09-23 | 2014-01-08 | 大同煤矿集团有限责任公司 | Poor-quality surrounding rock concrete wet-spraying method |
| CN104669424A (en) * | 2013-12-03 | 2015-06-03 | 任丘市永基建筑安装工程有限公司 | Concrete steam-curing crack control technique |
| CN104950099A (en) * | 2015-06-17 | 2015-09-30 | 福建省大地管桩有限公司 | Autoclave curing concrete admixture activity index inspection method |
| CN112225502A (en) * | 2020-09-25 | 2021-01-15 | 青岛青泰建筑科技有限公司 | Super early strength water reducing concrete and preparation method thereof |
| CN112521105A (en) * | 2020-12-25 | 2021-03-19 | 四川省公路规划勘察设计研究院有限公司 | Concrete prefabricated member for tensioning prestress in short time and preparation method thereof |
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| CN101717231A (en) * | 2009-08-18 | 2010-06-02 | 四川省富侨工业有限公司 | High-strength concrete, pipeline prepared by high-strength concrete and method for preparing pipeline |
| CN102633472A (en) * | 2012-04-13 | 2012-08-15 | 江苏建华管桩有限公司 | High-strength and high-durability pre-stressed concrete pile and production method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101717231A (en) * | 2009-08-18 | 2010-06-02 | 四川省富侨工业有限公司 | High-strength concrete, pipeline prepared by high-strength concrete and method for preparing pipeline |
| CN102633472A (en) * | 2012-04-13 | 2012-08-15 | 江苏建华管桩有限公司 | High-strength and high-durability pre-stressed concrete pile and production method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496901A (en) * | 2013-09-23 | 2014-01-08 | 大同煤矿集团有限责任公司 | Poor-quality surrounding rock concrete wet-spraying method |
| CN103496901B (en) * | 2013-09-23 | 2015-12-23 | 大同煤矿集团有限责任公司 | Country rock wet shot concrete method inferior |
| CN104669424A (en) * | 2013-12-03 | 2015-06-03 | 任丘市永基建筑安装工程有限公司 | Concrete steam-curing crack control technique |
| CN104950099A (en) * | 2015-06-17 | 2015-09-30 | 福建省大地管桩有限公司 | Autoclave curing concrete admixture activity index inspection method |
| CN112225502A (en) * | 2020-09-25 | 2021-01-15 | 青岛青泰建筑科技有限公司 | Super early strength water reducing concrete and preparation method thereof |
| CN112521105A (en) * | 2020-12-25 | 2021-03-19 | 四川省公路规划勘察设计研究院有限公司 | Concrete prefabricated member for tensioning prestress in short time and preparation method thereof |
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Application publication date: 20130306 |