CN111943598A - Environment-friendly high-strength concrete using circulating water - Google Patents
Environment-friendly high-strength concrete using circulating water Download PDFInfo
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- CN111943598A CN111943598A CN202010827465.XA CN202010827465A CN111943598A CN 111943598 A CN111943598 A CN 111943598A CN 202010827465 A CN202010827465 A CN 202010827465A CN 111943598 A CN111943598 A CN 111943598A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses environment-friendly high-strength concrete using circulating water, which comprises the following components in parts by weight: 1100 parts of 900-class pebbles, 850 parts of 730-class sand, 225 parts of 165-class cement, 150 parts of 125-class clean water, 35-70 parts of circulating water, 50-60 parts of fly ash, 65-75 parts of mineral powder and 15-22 parts of an additive, wherein the ratio of the circulating water to the clean water is 0.3-0.5. The invention has the effect of fully utilizing the waste water generated in the concrete production, saves water resources, reduces emission pollution, and is environment-friendly and energy-saving.
Description
Technical Field
The invention relates to the technical field of concrete preparation, in particular to environment-friendly high-strength concrete using circulating water.
Background
The concrete production process is relatively complex, and due to the mining and crushing of various natural resources, certain pollution is easily caused, however, under the national environmental protection requirement in recent years, more and more concrete production enterprises begin to move to the road of environmental protection production, the damage of production to the environment is reduced, meanwhile, the waste resources are fully utilized, and the good effect of recycling is achieved.
The outstanding improvement direction lies in the recycling of waste water during the production of concrete. After concrete production, not only the tank truck for transportation needs to be cleaned in time, but also the production equipment needs to be cleaned, necessary facilities such as dust fall and water spray can be arranged in the same site, and waste water with considerable quantity is generated in the forest. In the prior production, the waste water is directly discharged, which is not only harmful to the surrounding environment, but also causes higher water cost, so if the waste water can be reused, the effect of environmental protection and energy saving can be achieved, and based on the effect, the environment-friendly high-strength concrete using the waste water is provided.
Disclosure of Invention
In order to overcome the defect of more waste water caused by concrete production in the prior art, the invention provides environment-friendly high-strength concrete using circulating water.
The invention adopts the technical scheme that the environment-friendly high-strength concrete using circulating water comprises the following components in parts by weight: 1100 parts of 900-class pebbles, 850 parts of 730-class sand, 225 parts of 165-class cement, 150 parts of 125-class clean water, 35-70 parts of circulating water, 50-60 parts of fly ash, 65-75 parts of mineral powder and 15-22 parts of an additive, wherein the ratio of the circulating water to the clean water is 0.3-0.5.
Preferably, the additive comprises at least one of a water reducing agent, an early strength agent, a pumping agent and an air entraining agent.
Preferably, the ore powder is S95-grade ore powder, the specific surface area of the ore powder is 411, the 28-day activity index is 102%, the flow ratio is 99%, and the fineness modulus of the sand is 2.7.
Preferably, the circulating water is treated by the following steps:
step one, wastewater collection: collecting through water pipes or channels arranged on the ground of the field;
step two, multi-stage precipitation: carrying out precipitation treatment on the collected wastewater through a multi-stage sedimentation tank to precipitate and separate impurities in the wastewater to obtain separated water;
step three, detection and adjustment: detecting the solid content in the separated water, and adjusting the solid content to be less than or equal to 8%; and detecting the pH value of the primary circulating water, and adjusting the pH value to 6-8 to obtain circulating water.
Preferably, the waste water includes rainwater in concrete production, site washing water, equipment use or cleaning water, waste water for spraying of a spraying facility, and domestic water.
Preferably, the sedimentation tank in the second step comprises at least three stages which are communicated in sequence.
Preferably, a mud hydrometer is adopted in the three steps for detecting the solid content, and a flocculating agent is added for adjustment if the solid content is more than 8%; and (3) adopting an acidimeter to detect the pH value, and adopting a lime/limestone/dolomite solution to adjust if the pH value is larger.
Preferably, the last pond body upper cover of sedimentation tank is equipped with the lid of drawing water, the heat exchange tube has been buried underground in the last pond body of sedimentation tank, there is the heat source in the heat exchange tube, the lid of drawing water be used for with the water collection after the evaporation of the last pond body of sedimentation tank leads to in the cistern.
Preferably, the diversion cover is provided with a plurality of water collecting grooves, the two sides of each water collecting groove are provided with the diversion grooves, the water collecting grooves are formed towards the pool body and are formed towards the water collecting grooves, and the water collecting grooves are arranged in an arc surface or an inclined surface and are communicated with the diversion grooves.
Preferably, the heat source is lubricating oil or boiler exhaust gas or hot water.
Compared with the prior art, the invention has the following beneficial effects:
1. the effect of the waste water generated in the concrete production is fully utilized, the water resource is saved, the emission pollution is reduced, and the environment protection and energy saving are realized;
2. the wastewater is pretreated, solid waste contained in the wastewater is precipitated and separated, the pH value is adjusted, one part of the wastewater is used for production, the other part of the wastewater is discharged to reduce the pollution degree, and the amount of the discharged and treated wastewater is small, so that the treatment cost is reduced;
3. the lubricating oil or the boiler waste gas of the equipment or the hot water of the cooling equipment is used as a heat source to heat and evaporate the water in the final-stage sedimentation tank, the existing energy is fully utilized, the energy utilization efficiency is improved, meanwhile, the operation of cooling the lubricating oil or the boiler waste gas of the equipment or the hot water of the cooling equipment independently is reduced, the cost is saved, and the working efficiency is improved.
Drawings
The invention is described in detail below with reference to examples and figures, in which:
FIG. 1 is a schematic sectional view of a third-stage sedimentation tank and a water diversion cover;
fig. 2 is an enlarged view of fig. 1 at a.
1. A sedimentation tank; 2. a water diversion cover; 3. a water collection tank; 4. a water diversion groove; 5. a heat exchange tube.
Detailed Description
An environment-friendly high-strength concrete using circulating water comprises the following components in parts by weight:
1100 parts of 900-class pebbles, 850 parts of 730-class sand, 225 parts of 165-class cement, 150 parts of 125-class clean water, 35-70 parts of circulating water, 50-60 parts of fly ash, 65-75 parts of mineral powder and 15-22 parts of an additive, wherein the ratio of the circulating water to the clean water is 0.3-0.5.
Wherein the additive comprises at least one of a water reducing agent, an early strength agent, a pumping agent and an air entraining agent; the mineral powder is S95 grade mineral powder, the specific surface area of the mineral powder is 411, the 28-day activity index is 102%, the flow ratio is 99%, and the fineness modulus of the sand is 2.7.
Furthermore, the circulating water is treated by the following steps:
step one, wastewater collection: collecting through water pipes or channels arranged on the ground of the field;
step two, multi-stage precipitation: carrying out precipitation treatment on the collected wastewater through a multi-stage sedimentation tank to precipitate and separate impurities in the wastewater to obtain separated water;
step three, detection and adjustment: detecting the solid content in the separated water, and adjusting the solid content to be less than or equal to 8%; and detecting the pH value of the separated water, and adjusting the pH value to 6-8 to obtain circulating water. When solid content is detected, a mud hydrometer is adopted, and if the solid content is more than 8%, a flocculating agent is added for adjustment; and (3) adopting an acidimeter to detect the pH value, and adopting a lime/limestone/dolomite solution to adjust if the pH value is larger.
The waste water comprises rainwater in concrete production, site washing water, equipment use or cleaning water, spraying facility spraying waste water and domestic water. The sedimentation tanks in the second step comprise at least three stages which are sequentially communicated, and a certain height difference is formed among the three sedimentation tanks, so that the water body can flow from high to low.
In order to further treat the circulating water after the sedimentation treatment, as shown in fig. 1-2, a water diversion cover 2 is arranged on the last stage of the sedimentation tank 1, a heat exchange pipe 5 is embedded in the last stage of the sedimentation tank, a heat source is arranged in the heat exchange pipe 5, and the water diversion cover 2 is used for collecting and guiding the water body evaporated from the water in the last stage of the sedimentation tank into the water storage tank.
The diversion cover is provided with a plurality of water collecting grooves 3, the two sides of each water collecting groove are provided with diversion grooves 4, the water collecting grooves 3 are arranged towards the pool body, the diversion grooves 4 are arranged towards the water collecting grooves, and the water collecting grooves are arranged in a cambered surface or an inclined surface and are communicated with the diversion grooves. When the water in the water tank is evaporated, the water moves upwards and is attached to and condensed in the water collecting tank, when water drops accumulated by the water in the water collecting tank are large, the water drops flow into the water diversion tank along the cambered surface or the inclined surface, and finally the water diversion tank transports the water to the water storage tank to obtain a relatively pure water body. Furthermore, in order to facilitate the flow of water in the water diversion groove, the whole water diversion groove can be obliquely arranged, and the inclination can be 1% -2%.
The heat source is lubricating oil of equipment or boiler waste gas or hot water obtained by cooling equipment, and the circulating water body is heated in a third-stage sedimentation tank by laying a heat exchange pipe. Preferably, the water diversion cover is made of a material with good heat conductivity and an anti-rust function, such as aluminum or a transparent plastic material. The setting of drawing water lid, on the one hand the protection circulating water does not receive external pollution, and on the other hand has certain heat preservation effect, is favorable to the continuous evaporation of water.
1085 parts of stones, 820 parts of sand, 210 parts of cement, 125 parts of clear water, 52 parts of circulating water, 56 parts of fly ash, 72 parts of mineral powder and 18 parts of additives. The cement is Portland common cement with the label of P30, and the admixture is a water reducing agent and an air entraining agent.
925 parts of stones, 755 parts of sand, 180 parts of cement, 130 parts of clear water, 40 parts of circulating water, 52 parts of fly ash, 68 parts of mineral powder and 15 parts of additives. The cement is Portland common cement with the label of P30, and the admixture is a water reducing agent and an air entraining agent.
1005 parts of stones, 805 parts of sand, 198 parts of cement, 135 parts of clear water, 55 parts of circulating water, 55 parts of fly ash, 69 parts of mineral powder and 17 parts of additives. The cement is Portland common cement with the label of P30, and the admixture is a water reducing agent and an air entraining agent.
1085 parts of stones, 820 parts of sand, 210 parts of cement, 125 parts of clear water, 30 parts of circulating water, 22 parts of water in a reservoir, 56 parts of fly ash, 72 parts of mineral powder and 18 parts of additives, wherein the water in the reservoir is obtained by evaporating and collecting the circulating water in a third-stage sedimentation tank. The cement is Portland common cement with the label of P30, and the admixture is a water reducing agent and an air entraining agent.
1085 parts of stones, 820 parts of sand, 210 parts of cement, 125 parts of clear water, 52 parts of water in the reservoir, 56 parts of fly ash, 72 parts of mineral powder and 18 parts of additives, wherein the water in the reservoir is obtained by evaporating and collecting circulating water in the third-stage sedimentation tank. The cement is Portland common cement with the label of P30, and the admixture is a water reducing agent and an air entraining agent.
Comparative example 1, concrete, comprising the following components in parts by weight:
1085 parts of stones, 820 parts of sand, 210 parts of cement, 177 parts of clear water, 56 parts of fly ash, 72 parts of mineral powder and 18 parts of additives, wherein the water body in the reservoir is obtained by evaporating and collecting circulating water in the third-stage sedimentation tank. The cement is Portland common cement with the label of P30, and the admixture is a water reducing agent and an air entraining agent.
Comparative example 2, concrete, comprising the following components in parts by weight:
1085 parts of stones, 820 parts of sand, 210 parts of cement, 177 parts of circulating water, 56 parts of fly ash, 72 parts of mineral powder and 18 parts of additives, wherein the water body in the water reservoir is obtained by evaporating and collecting the circulating water in the third-stage sedimentation tank. The cement is Portland common cement with the label of P30, and the admixture is a water reducing agent and an air entraining agent.
Comparative example 3, concrete, comprising the following components in parts by weight:
1085 parts of stones, 820 parts of sand, 210 parts of cement, 177 parts of water in a reservoir, 56 parts of fly ash, 72 parts of mineral powder and 18 parts of additives, wherein the water in the reservoir is obtained by evaporating and collecting circulating water in a third-stage sedimentation tank. The cement is Portland common cement with the label of P30, and the admixture is a water reducing agent and an air entraining agent.
Comparative example 4, concrete, comprising the following components in parts by weight:
1085 parts of stones, 820 parts of sand, 210 parts of cement, 148 parts of clear water, 29 parts of circulating water, 56 parts of fly ash, 72 parts of mineral powder and 18 parts of additives, wherein the water body in the reservoir is obtained by evaporating and collecting the circulating water in the third-stage sedimentation tank. The cement is Portland common cement with the label of P30, and the admixture is a water reducing agent and an air entraining agent.
Comparative example 5, concrete, comprising the following components in parts by weight:
1085 parts of stones, 820 parts of sand, 210 parts of cement, 107 parts of clear water, 70 parts of circulating water, 56 parts of fly ash, 72 parts of mineral powder and 18 parts of additives, wherein the water body in the reservoir is obtained by evaporating and collecting the circulating water in the third-stage sedimentation tank. The cement is Portland common cement with the label of P30, and the admixture is a water reducing agent and an air entraining agent.
Experimental part
And (3) concrete impermeability test:
test samples: the concrete prepared in example 1, examples 4 and 5, and comparative examples 1 to 5 were selected as samples.
The test method comprises the following steps: selecting test samples, preparing standard concrete test pieces of 28d age, taking 6 test pieces in each group, cleaning the surfaces of the test pieces to be clean, rolling and coating a layer of molten sealing material on the side surfaces of the test pieces, and loading the test pieces into an impermeability instrument to perform standard impermeability tests. During the test, the water pressure starts from 0.2Mpa, the water pressure of 0.025Mpa is increased every 2 hours, the water seepage condition of the end face of the test block is recorded at any time, the water seepage condition is found when the water seepage condition is added to the surface of 3 test blocks in 6 test blocks, and the water pressure at the moment is recorded to judge whether the water seepage condition is qualified.
Testing the compressive strength of concrete:
test samples: the concrete prepared in example 1, examples 4 and 5, and comparative examples 1 to 5 were selected as samples.
The test method comprises the following steps: selecting test samples to prepare standard concrete test pieces of 7d age and 28d age, taking 6 test pieces in each group, cleaning the surface of the test piece to be clean, placing each concrete test piece on a standard compressive strength testing machine, sequentially applying pressure until cracks appear on the surface of the test piece, recording the pressure value at the moment, removing one highest value in each group, removing one lowest value, and taking the average value of the rest test pieces to be the compressive strength representative value of the group.
The respective initial setting time, final setting time, slump and 1h slump loss of the above experimental samples were observed again, and all the experimental data were recorded in table 1.
TABLE 1 Experimental data sheet
As can be seen from the comparison of the data in the above table between example 1 and comparative examples 4 and 5, the ratio between the clean water and the circulating water has an influence on slump, 1h pathfinding loss and compressive strength, and the ratio of the circulating water is preferably maintained between 0.3 and 0.5; meanwhile, as can be seen from the data between comparative examples 1 to 3, the circulating water can reduce the slump and the slump loss of the concrete, but can increase the strength of the concrete, and the water in the reservoir not only improves the slump of the concrete and reduces the slump loss, but also can increase the compressive strength of the concrete, which is the best choice, but the quantity is limited due to the manufacturing process and the cost.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The environment-friendly high-strength concrete using circulating water is characterized by comprising the following components in parts by weight:
1100 parts of 900-class pebbles, 850 parts of 730-class sand, 225 parts of 165-class cement, 150 parts of 125-class clean water, 35-70 parts of circulating water, 50-60 parts of fly ash, 65-75 parts of mineral powder and 15-22 parts of an additive, wherein the ratio of the circulating water to the clean water is 0.3-0.5.
2. The environment-friendly high-strength concrete using circulating water as claimed in claim 1, wherein the admixture comprises at least one of a water reducing agent, an early strength agent, a pumping agent and an air entraining agent.
3. The environment-friendly high-strength concrete using circulating water as claimed in claim 1, wherein the ore powder is S95 grade ore powder, the specific surface area of the ore powder is 411, the 28-day activity index is 102%, the fluidity ratio is 99%, and the fineness modulus of the sand is 2.7.
4. The environment-friendly high-strength concrete using circulating water according to claim 1, wherein the circulating water is treated by the following steps:
step one, wastewater collection: collecting through water pipes or channels arranged on the ground of the field;
step two, multi-stage precipitation: carrying out precipitation treatment on the collected wastewater through a multi-stage sedimentation tank to precipitate and separate impurities in the wastewater to obtain separated water;
step three, detection and adjustment: detecting the solid content in the separated water, and adjusting the solid content to be less than or equal to 8%; and detecting the pH value of the separated water, and adjusting the pH value to 6-8 to obtain circulating water.
5. The environment-friendly high-strength concrete using circulating water according to claim 4, wherein the waste water comprises rainwater, site washing water, equipment use or cleaning water, spraying facility spraying waste water and domestic water in concrete production.
6. The environment-friendly high-strength concrete using circulating water according to claim 5, wherein the sedimentation tank in the second step comprises at least three stages which are communicated in sequence.
7. The environment-friendly high-strength concrete using circulating water as claimed in claim 6, wherein a mud hydrometer is used when solid content is detected in the third step, and a flocculant is added for adjustment if the solid content is more than 8%; and (3) adopting an acidimeter to detect the pH value, and adopting a lime/limestone/dolomite solution to adjust if the pH value is larger.
8. The environment-friendly high-strength concrete using circulating water as claimed in claim 6, wherein a water diversion cover is provided on the upper cover of the last stage of the sedimentation tank, a heat exchange pipe is embedded in the last stage of the sedimentation tank, a heat source is provided in the heat exchange pipe, and the water diversion cover is used for collecting and guiding the water body after water evaporation in the last stage of the sedimentation tank into the water reservoir.
9. The environment-friendly high-strength concrete using circulating water as claimed in claim 8, wherein a plurality of water collecting grooves are formed on the water guiding cover, water guiding grooves are formed on both sides of the water collecting grooves, the water collecting grooves are formed towards the tank body, the water guiding grooves are formed towards the water collecting grooves, and the water collecting grooves are arranged in a cambered or inclined surface manner and are communicated with the water guiding grooves.
10. The environment-friendly high-strength concrete using circulating water as claimed in claim 8, wherein the heat source is lubricating oil or boiler exhaust gas or hot water.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114262105A (en) * | 2021-12-28 | 2022-04-01 | 普宁市吉润混凝土有限公司 | Carbon neutralization wastewater recycling treatment method and concrete containing wastewater |
| CN115124285A (en) * | 2021-12-09 | 2022-09-30 | 登封市中联混凝土有限公司 | Environment-friendly impervious concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174850A (en) * | 2015-10-14 | 2015-12-23 | 盐城市国泰混凝土有限公司 | Environment-friendly high-performance concrete produced by means of industrial wastewater and preparing method thereof |
| CN110568142A (en) * | 2019-09-25 | 2019-12-13 | 成都精准混凝土有限公司 | Detection process of concrete wastewater |
-
2020
- 2020-08-17 CN CN202010827465.XA patent/CN111943598A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174850A (en) * | 2015-10-14 | 2015-12-23 | 盐城市国泰混凝土有限公司 | Environment-friendly high-performance concrete produced by means of industrial wastewater and preparing method thereof |
| CN110568142A (en) * | 2019-09-25 | 2019-12-13 | 成都精准混凝土有限公司 | Detection process of concrete wastewater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115124285A (en) * | 2021-12-09 | 2022-09-30 | 登封市中联混凝土有限公司 | Environment-friendly impervious concrete |
| CN114262105A (en) * | 2021-12-28 | 2022-04-01 | 普宁市吉润混凝土有限公司 | Carbon neutralization wastewater recycling treatment method and concrete containing wastewater |
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Application publication date: 20201117 |