CN105084821A - High-strength reinforced concrete pipe culvert and preparation method thereof - Google Patents
High-strength reinforced concrete pipe culvert and preparation method thereof Download PDFInfo
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- CN105084821A CN105084821A CN201510494710.9A CN201510494710A CN105084821A CN 105084821 A CN105084821 A CN 105084821A CN 201510494710 A CN201510494710 A CN 201510494710A CN 105084821 A CN105084821 A CN 105084821A
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Abstract
The invention discloses a high-strength reinforced concrete pipe culvert and a preparation method thereof. The preparation method includes the steps that firstly, shell calcined matter is soaked into activation liquid, and then activated shell calcined matter is obtained through filtering, drying and screening; secondly, cement, the activated shell calcined matter, pebbles, sand, coal ash and water are mixed so that concrete can be prepared; thirdly, the concrete is poured into a reinforcement cage, and then the high-strength reinforced concrete pipe culvert is prepared through curing, wherein the activation liquid comprises water, hydrochloric acid, sulfurous acid and dimercaprol dimercaptopropanol. The high-strength reinforced concrete pipe culvert prepared through the method has excellent fracture load and failure load indexes.
Description
Technical field
The present invention relates to concrete box culvert, particularly, relate to a kind of high strength reinforced concrete box culvert and preparation method thereof.
Background technology
Contain the culvert referring to barrel and build with reinforced concrete box shaped tube coupling.Box culvert is made up of one or more square or rectangular cross-section, generally be made up of Steel Concrete or bricklaying, but Steel Concrete application is wider, when being less than 4m across footpath, adopt box culvert, for pipe culvert, high strength reinforced concrete box culvert is a cheap substitute, pier, upper and lower plates is all unanimously built.
At present, box culvert construct generally adopts cast-in-place, in the groove excavated, bottom is set, build one deck concrete cushion, the more on-the-spot colligation of reinforcing bar that will process, internal mold and external mold, larger box culvert generally first builds lower part of base plate and sidewall, colligation side wall upper part again and roof steel bar, a good interior external mold, builds sidewall upper part and top board.Treat that concrete reaches the intensity form removal of design requirements, backfill soil box culvert both sides while.Wherein, concrete is the deciding factor of the performance determining box culvert, but high strength reinforced concrete box culvert second-rate that existing concrete is formed after building under the condition of severe cold, it is up to standard that main manifestations is that the index of cracking load and failing load is difficult to.
Summary of the invention
The object of this invention is to provide a kind of high strength reinforced concrete box culvert and preparation method thereof, the high strength reinforced concrete box culvert obtained by the method has excellent cracking load and failing load index.
To achieve these goals, the invention provides a kind of preparation method of high strength reinforced concrete box culvert, comprising:
1) shell calcined material is soaked in activation solution, then filtration, dried and screened obtained activation shell calcined material;
2) by cement, activation shell calcined material, stone, sand, flyash and the obtained concrete of water mixing;
3) by concrete placement in Framework Of Steel Reinforcement, then maintenance obtains high strength reinforced concrete box culvert;
Wherein, activation solution contains water, hydrochloric acid, sulfurous acid and dimercaprol dimercaptopropanol.
Present invention also offers a kind of high strength reinforced concrete box culvert, high strength reinforced concrete box culvert is obtained by the preparation of above-mentioned method.
Pass through technique scheme, first the present invention carries out modification by hydrochloric acid, sulfurous acid and dimercaprol dimercaptopropanol to shell calcined material, and then activation shell calcined material and stone, sand, flyash and water make concrete can coagulation forming and then have cracking load and the failing load index of excellence under the condition of severe cold under acting synergistically.In the prior art, shell calcined material is can not as concrete raw material, because common shell calcined material can destroy the bounding force between reinforcing bar and concrete, but in the present invention, contriver makes shell calcined material can not only use as concrete raw material by carrying out activation modification to shell calcined material, can also improve concrete winter resistance simultaneously.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The invention provides a kind of preparation method of high strength reinforced concrete box culvert, comprising:
1) shell calcined material is soaked in activation solution, then filtration, dried and screened obtained activation shell calcined material;
2) by cement, activation shell calcined material, stone, sand, flyash and the obtained concrete of water mixing;
3) by concrete placement in Framework Of Steel Reinforcement, then maintenance obtains high strength reinforced concrete box culvert;
Wherein, activation solution contains water, hydrochloric acid, sulfurous acid and dimercaprol dimercaptopropanol.
In activation solution of the present invention, the consumption of each component can be selected in wide scope, but can activate further shell calcined material to make activation solution, preferably, in step 1) in, relative to the water of 100 weight parts, the consumption of hydrochloric acid is 15-20 weight part, the consumption of sulfurous acid is 7-11 weight part, and the consumption of dimercaprol dimercaptopropanol is 3-5 weight part.
In step 1 of the present invention) in, shell calcined material and activation solution consumption can be selected in wide scope, but can activate further shell calcined material to make activation solution, preferably, in step 1) in, relative to the shell calcined material of 100 weight parts, the consumption of activation solution is 300-500 weight part.
In step 1 of the present invention) in, soaking conditions can change in wide scope, but in order to make activation solution can activate further shell calcined material, preferably, in step 1) in, soak and at least meet the following conditions: soaking temperature is 70-90 DEG C, and soak time is 12-20h.
In step 1 of the present invention) in, drying conditions can be selected in wide scope, but in order to make the water content in activation shell calcined material low as much as possible, preferably, in step 1) in, drying at least meets the following conditions: drying temperature is 120-150 DEG C and is dried in mixture water ratio lower than 1%.
In step 1 of the present invention) in, the particle diameter of activation shell calcined material can be selected in wide scope, but in order to make the concrete obtained have more excellent cold performance, preferably, in step 1) in, in process of sieving, the order number of sieve is not less than 200 orders.
In step 2 of the present invention) in, the concrete consumption of each material can be selected in wide scope, but in order to make the concrete obtained have more excellent cold performance, preferably, in step 2) in, relative to the cement of 100 weight parts, the consumption of activation shell calcined material is 20-35 weight part, and the consumption of stone is 150-200 weight part, and the consumption of sand is 180-220 weight part, the consumption of flyash is 50-70 weight part, and the consumption of water is 250-300 weight part.
In step 3 of the present invention) in, curing condition can be selected in wide scope, but in order to make the concrete obtained, there is more excellent cracking load and failing load index, preferably, maintenance at least meets the following conditions: curing temperature is-5 ~ 0 DEG C, relative humidity is 50-60%, and curing time is 3-5 days.
Present invention also offers a kind of high strength reinforced concrete box culvert, high strength reinforced concrete box culvert is obtained by the preparation of above-mentioned method.
Below will be described the present invention by embodiment.
Embodiment 1
1) shell calcined material is soaked at 80 DEG C in activation solution 16h (weight ratio of shell calcined material and activation solution is 100:400), then filter, in 135 DEG C of dryings until water ratio is lower than 1%, cross 200 object sieve series and must activate shell calcined material; Wherein, activation solution contains water, hydrochloric acid, sulfurous acid and dimercaprol dimercaptopropanol (weight ratio is 100:17:8:4).
2) by cement, activation shell calcined material, stone, sand, flyash and the obtained concrete of water (weight ratio is 100:30:180:200:60:270) mixing.
3) by concrete placement in Framework Of Steel Reinforcement, then in-3 DEG C, relative humidity be the condition of 55% under maintenance 4 days obtained high strength reinforced concrete box culvert A1.
Embodiment 2
1) shell calcined material is soaked at 70 DEG C in activation solution 12h (weight ratio of shell calcined material and activation solution is 100:300), then filter, in 120 DEG C of dryings until water ratio is lower than 1%, cross 200 object sieve series and must activate shell calcined material; Wherein, activation solution contains water, hydrochloric acid, sulfurous acid and dimercaprol dimercaptopropanol (weight ratio is 100:15:7:3).
2) by cement, activation shell calcined material, stone, sand, flyash and the obtained concrete of water (weight ratio is 100:20:150:180:50:250) mixing.
3) by concrete placement in Framework Of Steel Reinforcement, then in-5 DEG C, relative humidity be the condition of 50% under maintenance 3 days obtained high strength reinforced concrete box culvert A2.
Embodiment 3
1) shell calcined material is soaked at 90 DEG C in activation solution 20h (weight ratio of shell calcined material and activation solution is 100:500), then filter, in 150 DEG C of dryings until water ratio is lower than 1%, cross 200 object sieve series and must activate shell calcined material; Wherein, activation solution contains water, hydrochloric acid, sulfurous acid and dimercaprol dimercaptopropanol (weight ratio is 100:20:11:5).
2) by cement, activation shell calcined material, stone, sand, flyash and the obtained concrete of water (weight ratio is 100:35:200:220:70:300) mixing.
3) by concrete placement in Framework Of Steel Reinforcement, then in 0 DEG C, relative humidity be the condition of 60% under maintenance 5 days obtained high strength reinforced concrete box culvert A3.
Comparative example 1
Obtained high strength reinforced concrete box culvert B1 is carried out according to the method for embodiment 1, unlike, without hydrochloric acid in activation solution.
Comparative example 2
Obtained high strength reinforced concrete box culvert B2 is carried out according to the method for embodiment 1, unlike, without sulfurous acid in activation solution.
Comparative example 3
Obtained high strength reinforced concrete box culvert B3 is carried out according to the method for embodiment 1, unlike, without dimercaprol dimercaptopropanol in activation solution.
Comparative example 4
Obtained high strength reinforced concrete box culvert B4 is carried out according to the method for embodiment 1, unlike, step 2) middle without activation shell calcined material.
Test example 1
The method recorded according to GB/T11836-2009 detects the cracking load (F1/kNm of above-mentioned obtained high strength reinforced concrete box culvert
-1) and failing load (F2/kNm
-1), concrete outcome is in table 1.
Table 1
| F1/kN·m -1 | F2/kN·m -1 | |
| A1 | 80 | 120 |
| A2 | 81 | 123 |
| A3 | 75 | 118 |
| B1 | 50 | 104 |
| B2 | 46 | 95 |
| B3 | 52 | 97 |
| B4 | 55 | 101 |
Known by above-described embodiment, comparative example and test example, high strength reinforced concrete box culvert provided by the invention has excellent cracking load and failing load index, immediately under severe cold condition.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out arbitrary combination between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (9)
1. a preparation method for high strength reinforced concrete box culvert, is characterized in that, comprising:
1) shell calcined material is soaked in activation solution, then filtration, dried and screened obtained activation shell calcined material;
2) by obtained for the mixing of cement, described activation shell calcined material, stone, sand, flyash and water concrete;
3) by described concrete placement in Framework Of Steel Reinforcement, then maintenance obtains high strength reinforced concrete box culvert;
Wherein, activation solution contains water, hydrochloric acid, sulfurous acid and dimercaprol dimercaptopropanol.
2. preparation method according to claim 1, wherein, in step 1) in, relative to the water of 100 weight parts, the consumption of described hydrochloric acid is 15-20 weight part, and the consumption of described sulfurous acid is 7-11 weight part, and the consumption of described dimercaprol dimercaptopropanol is 3-5 weight part.
3. preparation method according to claim 1, wherein, in step 1) in, relative to the described shell calcined material of 100 weight parts, the consumption of described activation solution is 300-500 weight part.
4. according to the preparation method in claim 1-3 described in any one, wherein, in step 1) in, described immersion at least meets the following conditions: soaking temperature is 70-90 DEG C, and soak time is 12-20h.
5. according to the preparation method in claim 1-3 described in any one, wherein, in step 1) in, described drying at least meets the following conditions: drying temperature is 120-150 DEG C and is dried in mixture water ratio lower than 1%.
6. according to the preparation method in claim 1-3 described in any one, wherein, in step 1) in, described in sieve process in sieve order number be not less than 200 orders.
7. according to the preparation method in claim 1-3 described in any one, wherein, in step 2) in, relative to the described cement of 100 weight parts, the consumption of described activation shell calcined material is 20-35 weight part, and the consumption of described stone is 150-200 weight part, and the consumption of described sand is 180-220 weight part, the consumption of described flyash is 50-70 weight part, and the consumption of described water is 250-300 weight part.
8. according to the preparation method in claim 1-3 described in any one, wherein, described maintenance at least meets the following conditions: curing temperature is-5 ~ 0 DEG C, and relative humidity is 50-60%, and curing time is 3-5 days.
9. a high strength reinforced concrete box culvert, is characterized in that, described high strength reinforced concrete box culvert obtains according to method preparation described in any one in claim 1-8.
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| CN107244840A (en) * | 2017-05-23 | 2017-10-13 | 安徽砼宇特构科技有限公司 | Strong concrete box culvert and preparation method thereof |
| CN107265905A (en) * | 2017-05-23 | 2017-10-20 | 安徽砼宇特构科技有限公司 | Polymer concrete additive and preparation method thereof and concrete |
| CN107324701A (en) * | 2017-05-23 | 2017-11-07 | 安徽砼宇特构科技有限公司 | Impervious concrete box culvert and preparation method thereof |
| CN107337370A (en) * | 2017-05-23 | 2017-11-10 | 安徽砼宇特构科技有限公司 | High strength fibre concrete additive and preparation method thereof and concrete |
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| CN1693256A (en) * | 2005-04-29 | 2005-11-09 | 仇心金 | Concrete products with sea coquina with foaming agent in pressure container by steaming, and mfg. method thereof |
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Application publication date: 20151125 |