Composition and application thereof in water quality purification type concrete

Abstract

The invention belongs to the technical field of hydraulic materials, and particularly relates to a composition and application thereof in water quality purification type concrete. The invention provides a composition. The composition comprises gravel aggregate, Portland cement, a water reducing agent, an adsorbent and water. The invention also provides an application of the composition in water quality purification type concrete. In the application, by adjusting the formula of the composition and adding the adsorbent into the composition, harmful substances such as heavy metal ions, organic pollutants and the like in water can be adsorbed, the effect of purifying water is achieved, and the technical effect of maintaining ecological balance can be further achieved for a long time; meanwhile, it can be determined that the composition also has relatively high compressive strength and durability at the same time. The composition provided by the invention not only can ensure the strength of the revetment, but also has a good ecological function and water quality purification capability; the technical defect that in the prior art, concrete with the water quality purification or water ecological restoration function is lacked is overcome.

Description

Technical Field

[0001] The present application belongs to the technical field of hydraulic materials, and in particular relates to a composition and its application in water-purifying concrete. Background Art

[0002] With the rapid development of the current social economy, the water ecological environment is facing severe challenges. With the rapid increase in urban population, the amount of wastewater discharge continues to increase, and rivers are polluted to varying degrees, and some have even become black and smelly water bodies. Traditional river bank protection materials are difficult to meet the actual needs of maintaining the green, healthy and sustainable development of river ecology.

[0003] While ensuring that the strength and stability of the revetment meet the requirements, the porous concrete can absorb and intercept pollutants in the water through its pore structure, providing abundant attachment space for microorganisms, which is conducive to the growth and reproduction of microorganisms and improves the efficiency of water purification. In the prior art, the research and application of porous concrete mainly focus on pH value, strength, porosity and plant growth effect. There is no relevant report on the water purification and water ecological restoration of porous concrete in the prior art.

[0004] Therefore, developing a composition and its application in water-purifying concrete to solve the technical defect of the prior art, which is the lack of a concrete with water purification or water ecological restoration function, has become an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] Based on this, it is necessary to provide a composition and its application in water-purifying concrete to address the technical defects of the existing technology, which lacks a concrete with water purification or water ecological restoration functions.

[0006] The present application provides a composition, the raw materials of which include: crushed stone aggregate, silicate cement, a water reducing agent, an adsorbent and water.

[0007] In one embodiment, the adsorbent is selected from any one or more of sulfided coal powder, wood activated carbon powder and macroporous adsorption resin.

[0008] In one embodiment, the particle size of the wood activated carbon powder is 200-300 mesh.

[0009] In one embodiment, the raw materials of the composition include, by weight: 1200-1500 parts of crushed stone aggregate, 350-410 parts of Portland cement, 2-3 parts of water reducer, 1-30 parts of adsorbent and 100-120 parts of water.

[0010] In one embodiment, the raw materials of the composition include, by weight: 1200-1500 parts of crushed stone aggregate, 350-410 parts of Portland cement, 2-3 parts of water reducer, 10-30 parts of sulfidized coal powder and 100-120 parts of water.

[0011] In one embodiment, the raw materials of the composition include, by weight: 1200-1500 parts of crushed stone aggregate, 350-410 parts of Portland cement, 2-3 parts of water reducer, 2-10 parts of wood activated carbon powder and 100-120 parts of water.

[0012] In one embodiment, the raw materials of the composition include, by weight: 1200-1500 parts of crushed stone aggregate, 350-410 parts of Portland cement, 2-3 parts of water reducer, 1-5 parts of macroporous adsorption resin and 100-120 parts of water.

[0013] In one embodiment, the particle size of the crushed stone aggregate is 5 to 20 mm, and the bulk density of the crushed stone aggregate is 1454 kg / m 3 The apparent density of the crushed stone aggregate is 2710 kg / m 3 The compacted porosity of the crushed stone aggregate is 44%.

[0014] In one embodiment, the cement is P·O42.5 cement;

[0015] and / or,

[0016] The water reducing agent is a slow-setting high-efficiency water reducing agent, and the water reducing rate of the water reducing agent is 15%.

[0017] The present application also provides an application of the composition described in any one of the above items in water-purifying concrete.

[0018] In summary, the present application provides a composition, the raw materials of which include: crushed stone aggregate, silicate cement, water reducer, adsorbent and water. The present application also provides an application of the above composition in water purification concrete. In the technical scheme provided by the present application, by adjusting the formula of the composition and adding an adsorbent to the composition, harmful substances such as heavy metal ions and organic pollutants in the water body can be adsorbed to purify the water quality, and can further play a technical effect of maintaining ecological balance in the long term; at the same time, it has been determined that the composition also has high compressive strength and durability. The composition provided by the present application can not only ensure the strength of the bank protection, but also has good ecological functions and water purification capabilities; it solves the technical defects of the prior art that there is a lack of concrete with water purification or water ecological restoration functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of a product of a concrete specimen made from the composition in the technical solution provided in the embodiment of the present application;

[0021] Figure 2 A schematic diagram of a compressive strength test of concrete prepared from a composition in the technical solution provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The embodiments of the present application provide a composition and its application in water-purifying concrete, which are used to solve the technical defect of the prior art that there is a lack of concrete with water purification or water ecological restoration functions.

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0029] Example 1

[0030] This embodiment is a specific embodiment of preparing a concrete product 1.

[0031] 1425 parts of crushed stone aggregate, 397 parts of Portland cement, 2 parts of water reducer, 10 parts of adsorbent and 102 parts of water are mixed evenly and allowed to stand to obtain concrete product 1.

[0032] In this embodiment, the adsorbent is sulfidized coal powder; the particle size of the crushed stone aggregate is 5-20 mm, and the bulk density of the crushed stone aggregate is 1454 kg / m 3 The apparent density of crushed stone aggregate is 2710kg / m 3 The compacted porosity of the crushed stone aggregate is 44%; the cement is P·O42.5 cement; the water reducer is a slow-setting high-efficiency water reducer, and the water reducing rate of the water reducer is 15%.

[0033] Example 2

[0034] This embodiment is a specific embodiment of preparing a concrete product 2.

[0035] 1425 parts of crushed stone aggregate, 382 parts of silicate cement, 2 parts of water reducer, 25 parts of adsorbent and 102 parts of water are mixed evenly and allowed to stand to obtain concrete product 2.

[0036] In this embodiment, the adsorbent is sulfidized coal powder; the particle size of the crushed stone aggregate is 5-20 mm, and the bulk density of the crushed stone aggregate is 1454 kg / m 3 The apparent density of crushed stone aggregate is 2710kg / m 3 The compacted porosity of the crushed stone aggregate is 44%; the cement is P·O42.5 cement; the water reducer is a slow-setting high-efficiency water reducer, and the water reducing rate of the water reducer is 15%.

[0037] Example 3

[0038] This embodiment is a specific embodiment of preparing a concrete product 3.

[0039] 1425 parts of crushed stone aggregate, 375 parts of Portland cement, 2 parts of water reducer, 30 parts of adsorbent and 102 parts of water are mixed evenly and allowed to stand to obtain concrete product 3.

[0040] In this embodiment, the adsorbent is sulfidized coal powder; the particle size of the crushed stone aggregate is 5-20 mm, and the bulk density of the crushed stone aggregate is 1454 kg / m 3 The apparent density of crushed stone aggregate is 2710kg / m 3 The compacted porosity of the crushed stone aggregate is 44%; the cement is P·O42.5 cement; the water reducer is a slow-setting high-efficiency water reducer, and the water reducing rate of the water reducer is 15%.

[0041] Example 4

[0042] This embodiment is a specific embodiment of preparing a concrete product 4.

[0043] 1425 parts of crushed stone aggregate, 405 parts of Portland cement, 2 parts of water reducer, 2 parts of adsorbent and 102 parts of water are mixed evenly and allowed to stand to obtain concrete product 4.

[0044] In this embodiment, the adsorbent is wood activated carbon powder; the particle size of the crushed stone aggregate is 5-20 mm, and the bulk density of the crushed stone aggregate is 1454 kg / m 3 The apparent density of crushed stone aggregate is 2710kg / m 3 The compacted porosity of the crushed stone aggregate is 44%; the cement is P·O42.5 cement; the water reducer is a slow-setting high-efficiency water reducer, and the water reducing rate of the water reducer is 15%.

[0045] Example 5

[0046] This embodiment is a specific embodiment of preparing a concrete product 5.

[0047] 1425 parts of crushed stone aggregate, 401 parts of Portland cement, 2 parts of water reducer, 6 parts of adsorbent and 102 parts of water are mixed evenly and allowed to stand to obtain concrete product 5.

[0048] In this embodiment, the adsorbent is wood activated carbon powder; the particle size of the crushed stone aggregate is 5-20 mm, and the bulk density of the crushed stone aggregate is 1454 kg / m 3 The apparent density of crushed stone aggregate is 2710kg / m 3 The compacted porosity of the crushed stone aggregate is 44%; the cement is P·O42.5 cement; the water reducer is a slow-setting high-efficiency water reducer, and the water reducing rate of the water reducer is 15%.

[0049] Example 6

[0050] This embodiment is a specific embodiment of preparing a concrete product 6.

[0051] 1425 parts of crushed stone aggregate, 397 parts of silicate cement, 3 parts of water reducer, 10 parts of adsorbent and 102 parts of water are mixed evenly and allowed to stand to obtain concrete product 6.

[0052] In this embodiment, the adsorbent is wood activated carbon powder; the particle size of the crushed stone aggregate is 5-20 mm, and the bulk density of the crushed stone aggregate is 1454 kg / m 3 The apparent density of crushed stone aggregate is 2710kg / m 3 The compacted porosity of the crushed stone aggregate is 44%; the cement is P·O42.5 cement; the water reducer is a slow-setting high-efficiency water reducer, and the water reducing rate of the water reducer is 15%.

[0053] Example 7

[0054] This embodiment is a specific embodiment of preparing a concrete product 7.

[0055] 1425 parts of crushed stone aggregate, 406 parts of Portland cement, 2 parts of water reducer, 1 part of adsorbent and 102 parts of water are mixed evenly and allowed to stand to obtain concrete product 7.

[0056] In this embodiment, the adsorbent is a macroporous adsorption resin; the particle size of the crushed stone aggregate is 5 to 20 mm, and the bulk density of the crushed stone aggregate is 1454 kg / m 3 The apparent density of crushed stone aggregate is 2710kg / m 3 The compacted porosity of the crushed stone aggregate is 44%; the cement is P·O42.5 cement; the water reducer is a slow-setting high-efficiency water reducer, and the water reducing rate of the water reducer is 15%.

[0057] Example 8

[0058] This embodiment is a specific embodiment of preparing a concrete product 8.

[0059] 1425 parts of crushed stone aggregate, 405 parts of Portland cement, 2 parts of water reducer, 3 parts of adsorbent and 102 parts of water are mixed evenly and allowed to stand to obtain concrete product 8.

[0060] In this embodiment, the adsorbent is a macroporous adsorption resin; the particle size of the crushed stone aggregate is 5 to 20 mm, and the bulk density of the crushed stone aggregate is 1454 kg / m 3 The apparent density of crushed stone aggregate is 2710kg / m 3 The compacted porosity of the crushed stone aggregate is 44%; the cement is P·O42.5 cement; the water reducer is a slow-setting high-efficiency water reducer, and the water reducing rate of the water reducer is 15%.

[0061] Example 9

[0062] This embodiment is a specific embodiment of preparing a concrete product 9.

[0063] 1425 parts of crushed stone aggregate, 402 parts of Portland cement, 2 parts of water reducer, 5 parts of adsorbent and 102 parts of water are mixed evenly and allowed to stand to obtain concrete product 9.

[0064] In this embodiment, the adsorbent is a macroporous adsorption resin; the particle size of the crushed stone aggregate is 5 to 20 mm, and the bulk density of the crushed stone aggregate is 1454 kg / m 3 The apparent density of crushed stone aggregate is 2710kg / m 3 The compacted porosity of the crushed stone aggregate is 44%; the cement is P·O42.5 cement; the water reducer is a slow-setting high-efficiency water reducer, and the water reducing rate of the water reducer is 15%.

[0065] Comparative Example 1

[0066] This example is a specific example of preparing a concrete reference product.

[0067] 1425 parts of crushed stone aggregate, 407 parts of Portland cement, 2 parts of water reducer and 102 parts of water were mixed evenly and allowed to stand to obtain a concrete control product.

[0068] In this embodiment, the particle size of the crushed stone aggregate is 5-20 mm, and the bulk density of the crushed stone aggregate is 1454 kg / m 3 The apparent density of crushed stone aggregate is 2710kg / m 3 The compacted porosity of the crushed stone aggregate is 44%; the cement is P·O42.5 cement; the water reducer is a slow-setting high-efficiency water reducer, and the water reducing rate of the water reducer is 15%.

[0069] The schematic diagram of the concrete test pieces prepared in Examples 1-9 can be found in Figure 1 .

[0070] Figure 2 A schematic diagram of a compressive strength test of concrete prepared from a composition in the technical solution provided in an embodiment of the present application.

[0071] Example 10

[0072] This example is a specific example of testing the compressive strength of concrete products 1 to 9 and a concrete reference product. Figure 2 This is a schematic diagram of the compressive strength test of concrete made from the composition in Example 10.

[0073] According to the requirements of the "Test Code for Hydraulic Concrete" (SL / T 352-2020), the porous concrete formulated in the above embodiments and comparative examples was made into test specimens, and its 28d compressive strength was tested. The results are shown in Table 1.

[0074] Table 1

[0075] Compressive strength(MPa) Concrete products1 27.6 Concrete products 2 26.0 Concrete products 3 24.2 Concrete products 4 26.9 Concrete products 5 24.0 Concrete products 6 23.4 Concrete products7 24.3 Concrete products8 23.4 Concrete products 9 23.5 Concrete reference 23.0

[0076] It can be concluded from Table 1 that in all embodiments, when the adsorbent is sulfidized coal powder (concrete products 1-3), the compressive strength of the concrete is relatively high. In particular, concrete product 1 (adsorbent dosage 10 parts) reaches the highest compressive strength of 27.6 MPa. As the amount of adsorbent increases (concrete products 2 and 3), the compressive strength decreases slightly, but is still higher than that of concrete without adding or using other types of adsorbents.

[0077] When the adsorbent is wood activated carbon powder (concrete products 4-6), the compressive strength is lower than that of sulfided coal powder, and as the amount of adsorbent increases (from 2 parts to 10 parts), the compressive strength does not increase significantly, and even decreases slightly.

[0078] When the adsorbent is a macroporous adsorption resin (concrete products 7-9), the compressive strength is also relatively low, and does not change much with the increase in the amount of adsorbent (from 1 part to 5 parts).

[0079] This suggests that sulfided coal powder as an adsorbent may have a positive effect on the compressive strength of concrete, while wood activated carbon powder and macroporous adsorption resin have a smaller or insignificant effect on improving the compressive strength.

[0080] Embodiment 11

[0081] This example is a specific example of measuring the water purification effect of concrete products 1 to 9 and a concrete reference product.

[0082] Concrete products 1 to 9 and concrete reference products were added respectively, and after standard curing for 28 days, they were placed in test water buckets. 25L of test configuration contaminated water sample and 1 porous concrete specimen were placed in each test water bucket, with a solid-liquid ratio of 1:7.5, and an immersion test was carried out at a time scale of 2 weeks. After the test, the changes in water quality indicators such as total nitrogen (TN), total phosphorus (TP), chemical oxygen demand (COD), heavy metal cadmium, and lead in the water samples in each water bucket were tested. Please refer to Table 2 for water quality indicators before the test, and the test results after the test are shown in Table 3.

[0083] Table 2

[0084] Total nitrogen (mg / L) Total phosphorus (mg / L) Chemical oxygen demand (mg / L) Cadmium (mg / L) Lead (mg / L) 5.58 0.28 41 0.011 0.023

[0085] Table 3

[0086] Total nitrogen (mg / L) Total phosphorus (mg / L) Chemical oxygen demand (mg / L) Cadmium (mg / L) Lead (mg / L) Concrete products1 5.24 0.23 11 0.018 0.019 Concrete products 2 5.17 0.18 9 0.014 0.018 Concrete products 3 5.14 0.17 8 0.0003 0.017 Concrete products 4 5.36 0.13 5 0.0012 0.007 Concrete products 5 5.32 0.12 6 0.001 0.006 Concrete products 6 5.27 0.12 5 0.0009 0.005 Concrete products7 5.48 0.19 10 0.0017 0.015 Concrete products8 5.43 0.17 8 0.0014 0.014 Concrete products 9 5.40 0.16 7 0.0012 0.011 Concrete reference 5.50 0.25 23 0.0054 0.021

[0087] From Tables 2 and 3, it can be concluded that concrete products 1 to 9 and the concrete control product all produced good water purification effects on a 2-week time scale:

[0088] (1) Removal effect of total nitrogen (TN):

[0089] All concrete products reduced the total nitrogen content in the water samples to some extent, but the reduction was not large, ranging from 0.2 to 0.4 mg / L. This indicates that these concrete products have limited effect on the removal of total nitrogen.

[0090] The concrete control had the least significant effect on total nitrogen removal, only decreasing from 5.58 mg / L to 5.50 mg / L, indicating that concrete without the addition of special adsorbents had a weaker ability to remove total nitrogen.

[0091] (2) Removal effect of total phosphorus (TP):

[0092] The total phosphorus content in the water samples added to the concrete products was significantly reduced, especially the concrete products with wood activated carbon powder as the adsorbent (4-6), which had the most obvious total phosphorus removal effect, with a removal rate close to or exceeding 50%; the concrete products with sulfide coal powder as the adsorbent (1-3) also showed a good total phosphorus removal effect, but slightly inferior to the concrete products with wood activated carbon powder as the adsorbent (4-6); the concrete products with macroporous adsorption resin as the adsorbent (7-9) performed moderately in terms of total phosphorus removal; the concrete control product had the worst total phosphorus removal effect, only reducing from 0.28 mg / L to 0.25 mg / L.

[0093] (3) Chemical oxygen demand (COD) removal effect:

[0094] All concrete products significantly reduced the chemical oxygen demand in water samples, especially the concrete products with wood activated carbon powder as adsorbent (4-6), which had the most significant COD removal effect, with a removal rate of more than 80%; concrete products with sulfide coal powder as adsorbent (1-3) and concrete products with macroporous adsorption resin as adsorbent (7-9) also showed good COD removal effects, but were slightly inferior to the products with wood activated carbon powder; the concrete control product had a relatively weak COD removal effect, only reducing it from 41 mg / L to 23 mg / L.

[0095] (4) Removal effect of heavy metal cadmium and lead:

[0096] In terms of heavy metal removal, all concrete products showed excellent performance. Concrete products with wood activated carbon powder as adsorbent (4-6) performed particularly well in heavy metal removal, which may be related to their high specific surface area and strong adsorption capacity. Concrete products with sulfide coal powder and macroporous adsorption resin as adsorbents also showed good heavy metal removal effects, but were slightly inferior to wood activated carbon powder. The concrete control product had limited effect on heavy metal removal, especially the removal effect of cadmium was poor.

[0097] It can be concluded from the above embodiments that the technical solution provided by this application has the following advantages:

[0098] 1. In the technical solution provided in the present application, concrete is prepared by adding an adsorbent material into the composition formula. The prepared concrete has good adsorption performance and can effectively adsorb harmful substances in water, such as heavy metal ions, organic pollutants, etc., thereby improving water quality.

[0099] 2. In the technical solution provided in this application, the concrete produced can provide a growth environment for aquatic plants and microorganisms, promote the recovery and healthy development of the water ecosystem, which is of great significance for maintaining the ecological balance of rivers and improving biodiversity.

[0100] 3. In the technical solution provided by this application, by optimizing the material ratio and preparation process, the concrete produced has high compressive strength and durability. When used in river bank protection and other projects, it can maintain the stability and reliability of the structure for a long time.

[0101] 4. In the technical solution provided in this application, a slow-setting high-efficiency water-reducing agent is selected to effectively improve the fluidity of concrete and reduce the difficulty of construction; at the same time, reasonable material ratio and aggregate particle size selection make the concrete have better working performance and pumpability.

[0102] In summary, the present application provides a composition, the raw materials of which include: crushed stone aggregate, silicate cement, water reducer, adsorbent and water. The present application also provides an application of the above composition in water purification concrete. In the technical scheme provided by the present application, by adjusting the formula of the composition and adding an adsorbent to the composition, harmful substances such as heavy metal ions and organic pollutants in the water body can be adsorbed to purify the water quality, and can further play a technical effect of maintaining ecological balance in the long term; at the same time, it has been determined that the composition also has high compressive strength and durability. The composition provided by the present application can not only ensure the strength of the bank protection, but also has good ecological functions and water purification capabilities; it solves the technical defects of the prior art that there is a lack of concrete with water purification or water ecological restoration functions.

[0103] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. At the same time, other implementation methods can be derived from the above-mentioned embodiments, so that structural and logical replacements and changes can be made without departing from the scope of this disclosure.

[0104] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A composition, characterized in that The raw materials of the composition include crushed stone aggregate, silicate cement, water reducing agent, adsorbent and water.

2. The composition according to claim 1, characterized in that The adsorbent is selected from any one or more of sulfided coal powder, wood activated carbon powder and macroporous adsorption resin.

3. The composition according to claim 2, characterized in that The particle size of the wood activated carbon powder is 200-300 meshes.

4. The composition according to any one of claims 1 to 3, characterized in that The raw materials of the composition include, by weight: 1200-1500 parts of crushed stone aggregate, 350-410 parts of Portland cement, 2-3 parts of water reducer, 1-30 parts of adsorbent and 100-120 parts of water.

5. The composition according to claim 2 or 3, characterized in that The raw materials of the composition include, by weight: 1200-1500 parts of crushed stone aggregate, 350-410 parts of Portland cement, 2-3 parts of water reducer, 10-30 parts of sulfided coal powder and 100-120 parts of water.

6. The composition according to claim 2 or 3, characterized in that The raw materials of the composition include, by weight: 1200-1500 parts of crushed stone aggregate, 350-410 parts of Portland cement, 2-3 parts of water reducer, 2-10 parts of wood activated carbon powder and 100-120 parts of water.

7. The composition according to claim 2 or 3, characterized in that The raw materials of the composition include, by weight: 1200-1500 parts of crushed stone aggregate, 350-410 parts of Portland cement, 2-3 parts of water reducer, 1-5 parts of macroporous adsorption resin and 100-120 parts of water.

8. The composition according to claim 1, characterized in that The particle size of the crushed stone aggregate is 5-20 mm, and the bulk density of the crushed stone aggregate is 1420-1460 kg / m 3 The apparent density of the crushed stone aggregate is 2690-2730 kg / m 3 The compacted porosity of the crushed stone aggregate is 40-45%.

9. The composition according to claim 1, characterized in that The cement is P·O42.5 cement; and / or, The water reducing agent is a slow-setting high-efficiency water reducing agent, and the water reducing rate of the water reducing agent is 15%.

10. Use of the composition according to any one of claims 1 to 9 in water-purifying concrete.

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