阅读说明：本技术 海水海砂混凝土级配设计方法 (Seawater sea sand concrete grading design method ) 是由 彭晓钢 刘涛 洪绍友 郑志刚 彭中祥 黄智� 李有志 李嘉 刘艾轩 于 2021-02-28 设计创作，主要内容包括：本发明涉及建筑材料的技术领域,公开了海水海砂混凝土级配设计方法,具体包括如下步骤：S1：对所收集的海水海砂混合物进行粉碎处理,消除海水海砂中的颗粒物杂质,使得海水海砂混合物粉碎后的物料粒径在0.12-0.25mm；S2：将粉碎后的海水海砂混合物倒入至调节池内,并且调节调节池内的温度至30-50℃、pH至7.5-8.5,调节完毕后使海水海砂混合物在调节池内浸泡5-8h；S3：将S2所浸泡后的海水海砂混合物排入至厌氧发酵罐内进行发酵,调节温度至50-55℃,发酵时长3-5h,并且回收发酵池内所排出的气体。本发明通过离子交换树脂与两性化合物的作用,大大提高了海水海砂混合物的回收使用率,同时也减小了海水的富营养化,在后续使用时能够混凝土的凝固力。(The invention relates to the technical field of building materials, and discloses a seawater sea sand concrete gradation design method, which specifically comprises the following steps: s1: crushing the collected seawater and sea sand mixture to eliminate particle impurities in the seawater and sea sand, so that the particle size of the crushed material of the seawater and sea sand mixture is 0.12-0.25 mm; s2: pouring the crushed sea water and sea sand mixture into an adjusting tank, adjusting the temperature in the adjusting tank to 30-50 ℃ and the pH value to 7.5-8.5, and soaking the sea water and sea sand mixture in the adjusting tank for 5-8h after the adjustment is finished; s3: discharging the mixture of seawater and sea sand soaked in S2 into an anaerobic fermentation tank for fermentation, adjusting the temperature to 50-55 ℃, fermenting for 3-5h, and recovering gas discharged from the fermentation tank. The invention greatly improves the recovery utilization rate of the seawater and sea sand mixture through the action of the ion exchange resin and the amphoteric compound, simultaneously reduces the eutrophication of seawater, and can realize the solidification force of concrete in subsequent use.)

1. The sea water sea sand concrete gradation design method is characterized by comprising the following steps:

s1: crushing the collected seawater and sea sand mixture to eliminate particle impurities in the seawater and sea sand, so that the particle size of the crushed material of the seawater and sea sand mixture is 0.12-0.25 mm;

s2: pouring the crushed sea water and sea sand mixture into an adjusting tank, adjusting the temperature in the adjusting tank to 30-50 ℃ and the pH value to 7.5-8.5, and soaking the sea water and sea sand mixture in the adjusting tank for 5-8h after the adjustment is finished;

s3: discharging the seawater and sea sand mixture soaked in the S2 into an anaerobic fermentation tank for fermentation, adjusting the temperature to 50-55 ℃, fermenting for 3-5h, and recovering gas discharged from the fermentation tank;

s4: discharging the seawater and sea sand mixture treated in the step S3 into an aerobic tank, continuously discharging air into the aerobic tank, adjusting the temperature in the aerobic tank to be 45-55 ℃, standing for 1.5-2h again, wherein thermophilic bacteria are arranged in the aerobic tank;

s5: discharging the seawater and sea sand mixture treated by the S4 into a nitrogen and phosphorus recovery tank, and adding the mixture into the nitrogen and phosphorus recovery tank according to the parts by weight: 50-80 parts of nitrogen recovery agent and 150 parts of phosphorus recovery agent, standing for 1-2 hours, and processing the recovered nitrogen and phosphorus elements into fertilizer;

s6: and (4) continuously mixing the seawater and sea sand mixture treated by the S5 with cement and an auxiliary agent for treatment experiments, and finally forming the seawater and sea sand concrete with the grading design.

2. The method of claim 1, wherein in step S3, the seawater-sea sand mixture is discharged into the anaerobic fermentation tank by filtration, the adjusting tank removes water-soluble organic substances from the seawater-sea sand mixture, and the upper filter residue left by the filtration is discharged into the anaerobic fermentation tank.

3. The method for designing the sea water sea sand concrete gradation according to claim 2, wherein one side of the anaerobic fermentation tank is communicated with an air pump, and the outlet end of the air pump is connected with a gas pipeline.

4. The method for designing seawater sea sand concrete gradation according to claim 3, wherein in S5, the nitrogen recovery agent is any one of styrene resin and acrylic resin, and the phosphorus recovery agent is one or a mixture of aluminum salt, iron salt and lime.

5. The method of claim 4, wherein the aluminum salt is any one of aluminum hydroxide, sodium metaaluminate and aluminum chloride.

6. The method for designing the grading of seawater sea sand concrete according to claim 5, wherein in S6, the seawater sea sand mixture is mixed with cement and auxiliary agents in parts by weight as follows: 100 portions of seawater and sea sand mixture, 250 portions of cement, 30 to 70 portions of cement and 20 to 45 portions of auxiliary agent.

7. The method for designing the gradation of seawater sea sand concrete according to claim 6, wherein the auxiliary agents comprise, in parts by weight: 1-3 parts of gypsum, 10-15 parts of broken stone, 0.5-1 part of water reducing agent and 1-2 parts of fly ash.

8. The method according to claim 7, wherein the seawater sea sand concrete is prepared by detecting the seawater sea sand concrete of different weight parts, comparing the detected results with strength data, and finally calculating the optimum graded design seawater sea sand concrete.

9. The seawater sea sand concrete gradation design method according to claim 8, wherein the detection data of the seawater sea sand concrete are respectively: the optimum graded design seawater sea sand concrete is measured and calculated through comparison of three data, namely the Weibo consistency, the standard maintenance 28-day compressive strength and the chloride ion content.

10. Use of a seawater sea sand concrete grading design method as defined in any one of claims 1-9 in seawater sea sand concrete production.

Technical Field

The invention relates to the technical field of building materials, in particular to a seawater sea sand concrete gradation design method.

Background

China faces a severe situation of resource and energy shortage, and the development and utilization of ocean resources are a feasible way for realizing sustainable development and solving the energy crisis of a new era, so that the ocean and island reef engineering construction is urgent in demand, and ocean engineering building materials with high durability and long service life are needed.

At present, fresh water and river sand are adopted for mixing of marine concrete, and the fresh water and the river sand are supplied and need to be transported from inland, so that the construction cost is greatly increased, and the construction of the remote sea island reef is more difficult. On the other hand, in recent years, the construction scale of China is rapidly enlarged, and the demand of concrete is increased year by year. However, the exploitation of a large amount of river sand consumes land resources, and also destroys gravel layers for conserving underground water resources, and the supply of river sand cannot meet the requirements of social and economic development increasingly with the improvement of environmental protection requirements and the exhaustion of river sand resources.

For some marine constructions with special requirements, such as rush repair and rush construction, the transportation time of fresh water and river sand is long, and the engineering requirements are difficult to meet, so that the use of seawater and seawater sand concrete is urgent, but because seawater contains a large amount of organic matters, the organic matters easily destroy the solidification force of the concrete when the seawater and seawater sand concrete is used, so that the seawater and seawater sand concrete is soft and cannot be mixed at the optimal grade, so that a great deal of blank exists for the use of seawater and seawater sand concrete at present.

Disclosure of Invention

The invention aims to provide a seawater and sea sand concrete gradation design method, which enables the recovery rate of nitrogen and phosphorus compounds in a seawater and sea sand mixture to reach 88.3% through the action of ion exchange resin and amphoteric compounds, thereby greatly improving the recovery utilization rate of the seawater and sea sand mixture, and aiming at solving the problems that in the prior art, because a large amount of organic matters are contained in seawater, the organic matters easily destroy the solidification force of concrete during use, so that the seawater and sea sand concrete is soft and cannot be mixed or cannot be mixed in an optimal grade.

The invention is realized in this way, the sea water sea sand concrete gradation design method, which comprises the following steps:

s1: crushing the collected seawater and sea sand mixture to eliminate particle impurities in the seawater and sea sand, so that the particle size of the crushed material of the seawater and sea sand mixture is 0.12-0.25 mm;

s2: pouring the crushed sea water and sea sand mixture into an adjusting tank, adjusting the temperature in the adjusting tank to 30-50 ℃ and the pH value to 7.5-8.5, and soaking the sea water and sea sand mixture in the adjusting tank for 5-8h after the adjustment is finished;

s3: discharging the seawater and sea sand mixture soaked in the S2 into an anaerobic fermentation tank for fermentation, adjusting the temperature to 50-55 ℃, fermenting for 3-5h, and recovering gas discharged from the fermentation tank;

s4: discharging the seawater and sea sand mixture treated in the step S3 into an aerobic tank, continuously discharging air into the aerobic tank, adjusting the temperature in the aerobic tank to be 45-55 ℃, standing for 1.5-2h again, wherein thermophilic bacteria are arranged in the aerobic tank;

s5: discharging the seawater and sea sand mixture treated by the S4 into a nitrogen and phosphorus recovery tank, and adding the mixture into the nitrogen and phosphorus recovery tank according to the parts by weight: 50-80 parts of nitrogen recovery agent and 150 parts of phosphorus recovery agent, standing for 1-2 hours, and processing the recovered nitrogen and phosphorus elements into fertilizer;

s6: and (4) continuously mixing the seawater and sea sand mixture treated by the S5 with cement and an auxiliary agent for treatment experiments, and finally forming the seawater and sea sand concrete with the grading design.

Further, in S3, the seawater-sea sand mixture is discharged into the anaerobic fermentation tank by filtration, the adjusting tank can remove water-soluble organic matters in the seawater-sea sand mixture, and the upper filter residue left by the filtration is discharged into the anaerobic fermentation tank.

Further, one side of the anaerobic fermentation tank is communicated with an air pump, and the outlet end of the air pump is connected with a gas pipeline.

Further, in S5, the nitrogen recovering agent is any one of a styrene resin and an acrylic resin, and the phosphorus recovering agent is one or a mixture of two of an aluminum salt, an iron salt, and lime.

Further, the aluminum salt is any one of aluminum hydroxide, sodium metaaluminate and aluminum chloride.

Further, in S6, the seawater-sea sand mixture, cement and auxiliary agents are as follows by weight: 100 portions of seawater and sea sand mixture, 250 portions of cement, 30 to 70 portions of cement and 20 to 45 portions of auxiliary agent.

Further, the auxiliary agent comprises the following components in parts by weight: 1-3 parts of gypsum, 10-15 parts of broken stone, 0.5-1 part of water reducing agent and 1-2 parts of fly ash.

Further, after the preparation of the seawater sea sand concrete is finished, the seawater sea sand concrete of different weight parts of raw materials is detected, the detected result is compared with strength data, and finally the seawater sea sand concrete with the optimal gradation is measured and calculated.

Further, the detection data of the seawater sea sand concrete are respectively as follows: the optimum graded design seawater sea sand concrete is measured and calculated through comparison of three data, namely the Weibo consistency, the standard maintenance 28-day compressive strength and the chloride ion content.

Mechanism of action

The nitrogen reclaiming agent recycles nitrogen elements in the organic solid waste by an ion exchange method, and has the principle that the nitrogen reclaiming agent contains weakly acidic groups, such as carboxyl-COOH, and can be dissociated into H + in seawater to be acidic, and negative groups, such as R-COO- (R is a hydrocarbon group), left after the ion exchange resin is dissociated can be adsorbed and combined with other cations in the solution to generate cation exchange effect, the nitrogen reclaiming agent is difficult to dissociate and carry out ion exchange at low pH and can only act in alkaline, neutral or slightly acidic solution, and the ion exchange resin is regenerated by acid, so the cost is low; the phosphorus recovery agent can react with some amphoteric compounds through phosphate to generate precipitate, the particle size of the precipitate is larger than that of sea sand, and the separation can be realized by optionally utilizing filtration, so that the recovery of phosphorus is facilitated.

Compared with the prior art, the seawater sea sand concrete gradation design method provided by the invention has the following beneficial effects: .

1. Under the action of the ion exchange resin and the amphoteric compound, the recovery rate of nitrogen and phosphorus compounds in the seawater and sea sand mixture reaches 88.3 percent, so that the recovery utilization rate of the seawater and sea sand mixture is greatly improved, the eutrophication of seawater is reduced, and the solidification force of concrete can be realized in subsequent use;

2. the method is characterized in that air is introduced into an aerobic tank, thermophilic bacteria are adopted to decompose a seawater and sea sand mixture, the growth speed of the thermophilic bacteria is fastest, lipid with a high proportion of long fatty chains is on cell membranes of the thermophilic bacteria, the cell membranes of the thermophilic bacteria can be in a liquid crystal state at high temperature, a large amount of glycerolipids are contained in membranes of the thermophilic bacteria, the increase of the growth temperature mainly influences fatty acyl chain components, the increase of saturation, acyl chain length and/or isomeric branches can be observed at the growth temperature, the membranes are made harder, the vitality of the membranes is stronger, and the decomposition of organic components in seawater is facilitated, so that the efficient organic removal condition is achieved.

Drawings

Fig. 1 is a flow chart of a seawater sea sand concrete gradation design method provided by the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following describes the implementation of the present invention in detail with reference to specific embodiments.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

Example 1

Referring to fig. 1, the seawater sea sand concrete gradation design method specifically includes the following steps:

s1: crushing the collected seawater and sea sand mixture to eliminate particle impurities in the seawater and sea sand, so that the particle size of the crushed material of the seawater and sea sand mixture is 0.12 mm;

s2: pouring the crushed sea water and sea sand mixture into an adjusting tank, adjusting the temperature in the adjusting tank to 30 ℃ and the pH value to 7.5, and soaking the sea water and sea sand mixture in the adjusting tank for 5 hours after the adjustment is finished;

s3: discharging the seawater and sea sand mixture soaked in the S2 into an anaerobic fermentation tank for fermentation, adjusting the temperature to 50 ℃, fermenting for 3 hours, and recovering gas discharged from the fermentation tank;

s4: discharging the seawater and sea sand mixture treated in the step S3 into an aerobic tank, continuously discharging air into the aerobic tank, adjusting the temperature in the aerobic tank to 45 ℃, standing for 1.5 hours again, wherein thermophilic bacteria are arranged in the aerobic tank;

s5: discharging the seawater and sea sand mixture treated by the S4 into a nitrogen and phosphorus recovery tank, and adding the mixture into the nitrogen and phosphorus recovery tank according to the parts by weight: 50 parts of nitrogen recycling agent and 120 parts of phosphorus recycling agent are kept stand for 1 hour, and the recycled nitrogen and phosphorus elements are processed into fertilizer;

s6: and (4) continuously mixing the seawater and sea sand mixture treated by the S5 with cement and an auxiliary agent for treatment experiments, and finally forming the seawater and sea sand concrete with the grading design.

In S5, the nitrogen-recovering agent is a styrene resin and the phosphorus-recovering agent is an aluminum salt.

The aluminum salt is aluminum hydroxide.

In S6, the seawater and sea sand mixture, cement and auxiliary agents are as follows according to parts by weight: 100 parts of seawater and sea sand mixture, 30 parts of cement and 20 parts of auxiliary agent.

The auxiliary agent comprises the following components in parts by weight: 1 part of gypsum, 10 parts of broken stone, 0.5 part of water reducing agent and 1 part of fly ash.

Example 2

Referring to fig. 1, the seawater sea sand concrete gradation design method specifically includes the following steps:

s1: crushing the collected seawater and sea sand mixture to eliminate particle impurities in the seawater and sea sand, so that the particle size of the crushed material of the seawater and sea sand mixture is 0.15 mm;

s2: pouring the crushed sea water and sea sand mixture into an adjusting tank, adjusting the temperature in the adjusting tank to 35 ℃ and the pH value to 7.5, and soaking the sea water and sea sand mixture in the adjusting tank for 6 hours after the adjustment is finished;

s3: discharging the seawater and sea sand mixture soaked in the S2 into an anaerobic fermentation tank for fermentation, adjusting the temperature to 52 ℃, fermenting for 4 hours, and recovering gas discharged from the fermentation tank;

s4: discharging the seawater and sea sand mixture treated in the step S3 into an aerobic tank, continuously discharging air into the aerobic tank, adjusting the temperature in the aerobic tank to 45 ℃, standing for 1.5 hours again, wherein thermophilic bacteria are arranged in the aerobic tank;

s5: discharging the seawater and sea sand mixture treated by the S4 into a nitrogen and phosphorus recovery tank, and adding the mixture into the nitrogen and phosphorus recovery tank according to the parts by weight: 60 parts of nitrogen recycling agent and 125 parts of phosphorus recycling agent, standing for 1 hour, and processing the recycled nitrogen and phosphorus elements into fertilizer;

s6: and (4) continuously mixing the seawater and sea sand mixture treated by the S5 with cement and an auxiliary agent for treatment experiments, and finally forming the seawater and sea sand concrete with the grading design.

In S5, the nitrogen recovery agent is acrylic resin, the phosphorus recovery agent is ferric salt and lime, and the mixing ratio is 1: 1.

In S6, the seawater and sea sand mixture, cement and auxiliary agents are as follows according to parts by weight: 120 parts of seawater and sea sand mixture, 40 parts of cement and 25 parts of auxiliary agent.

The auxiliary agent comprises the following components in parts by weight: 1 part of gypsum, 11 parts of broken stone, 0.5 part of water reducing agent and 1 part of fly ash.

Example 3

Referring to fig. 1, the seawater sea sand concrete gradation design method specifically includes the following steps:

s1: crushing the collected seawater and sea sand mixture to eliminate particle impurities in the seawater and sea sand, so that the particle size of the crushed material of the seawater and sea sand mixture is 0.18 mm;

s2: pouring the crushed sea water and sea sand mixture into an adjusting tank, adjusting the temperature in the adjusting tank to 40 ℃ and the pH value to 8, and soaking the sea water and sea sand mixture in the adjusting tank for 6 hours after the adjustment is finished;

s3: discharging the seawater and sea sand mixture soaked in the S2 into an anaerobic fermentation tank for fermentation, adjusting the temperature to 52 ℃, fermenting for 4 hours, and recovering gas discharged from the fermentation tank;

s4: discharging the seawater and sea sand mixture treated in the step S3 into an aerobic tank, continuously discharging air into the aerobic tank, adjusting the temperature in the aerobic tank to 45 ℃, standing for 1.5 hours again, wherein thermophilic bacteria are arranged in the aerobic tank;

s5: discharging the seawater and sea sand mixture treated by the S4 into a nitrogen and phosphorus recovery tank, and adding the mixture into the nitrogen and phosphorus recovery tank according to the parts by weight: 60 parts of nitrogen recycling agent and 130 parts of phosphorus recycling agent, standing for 1.5 hours, and processing the recycled nitrogen and phosphorus elements into fertilizer;

s6: and (4) continuously mixing the seawater and sea sand mixture treated by the S5 with cement and an auxiliary agent for treatment experiments, and finally forming the seawater and sea sand concrete with the grading design.

In S5, the nitrogen recovering agent is styrene resin, and the phosphorus recovering agent is aluminum salt and iron salt, and the mixing ratio is 1: 1.

The aluminum salt is sodium metaaluminate.

In S6, the seawater and sea sand mixture, cement and auxiliary agents are as follows according to parts by weight: 150 parts of seawater and sea sand mixture, 50 parts of cement and 30 parts of auxiliary agent.

The auxiliary agent comprises the following components in parts by weight: 2 parts of gypsum, 12 parts of broken stone, 0.7 part of water reducing agent and 1.2 parts of fly ash.

Example 4

Referring to fig. 1, the seawater sea sand concrete gradation design method specifically includes the following steps:

s1: crushing the collected seawater and sea sand mixture to eliminate particle impurities in the seawater and sea sand, so that the particle size of the crushed material of the seawater and sea sand mixture is 0.20 mm;

s2: pouring the crushed sea water and sea sand mixture into an adjusting tank, adjusting the temperature in the adjusting tank to 45 ℃ and the pH value to 8, and soaking the sea water and sea sand mixture in the adjusting tank for 7 hours after the adjustment is finished;

s3: discharging the seawater and sea sand mixture soaked in the S2 into an anaerobic fermentation tank for fermentation, adjusting the temperature to 53 ℃, fermenting for 4 hours, and recovering gas discharged from the fermentation tank;

s4: discharging the seawater and sea sand mixture treated in the step S3 into an aerobic tank, continuously discharging air into the aerobic tank, adjusting the temperature in the aerobic tank to 50 ℃, standing for 1.8h again, wherein thermophilic bacteria are arranged in the aerobic tank;

s5: discharging the seawater and sea sand mixture treated by the S4 into a nitrogen and phosphorus recovery tank, and adding the mixture into the nitrogen and phosphorus recovery tank according to the parts by weight: standing 70 parts of nitrogen recycling agent and 140 parts of phosphorus recycling agent for 1.5 hours, and processing the recycled nitrogen and phosphorus elements into fertilizer;

s6: and (4) continuously mixing the seawater and sea sand mixture treated by the S5 with cement and an auxiliary agent for treatment experiments, and finally forming the seawater and sea sand concrete with the grading design.

In S5, the nitrogen recovery agent is an acrylic resin, the phosphorus recovery agent is an aluminum salt and lime, and the mixing ratio is 1: 1.

the aluminum salt is aluminum chloride.

In S6, the seawater and sea sand mixture, cement and auxiliary agents are as follows according to parts by weight: 200 parts of seawater and sea sand mixture, 60 parts of cement and 40 parts of auxiliary agent.

The auxiliary agent comprises the following components in parts by weight: 2 parts of gypsum, 13 parts of broken stone, 1 part of water reducing agent and 1.5 parts of fly ash.

Example 5

Referring to fig. 1, the seawater sea sand concrete gradation design method specifically includes the following steps:

s1: crushing the collected seawater and sea sand mixture to eliminate particle impurities in the seawater and sea sand, so that the particle size of the crushed material of the seawater and sea sand mixture is 0.25 mm;

s2: pouring the crushed sea water and sea sand mixture into an adjusting tank, adjusting the temperature in the adjusting tank to 50 ℃ and the pH value to 8.5, and soaking the sea water and sea sand mixture in the adjusting tank for 8 hours after the adjustment is finished;

s3: discharging the seawater and sea sand mixture soaked in the S2 into an anaerobic fermentation tank for fermentation, adjusting the temperature to 55 ℃, fermenting for 5 hours, and recovering gas discharged from the fermentation tank;

s4: discharging the seawater and sea sand mixture treated in the step S3 into an aerobic tank, continuously discharging air into the aerobic tank, adjusting the temperature in the aerobic tank to 55 ℃, standing for 2 hours again, wherein thermophilic bacteria are arranged in the aerobic tank;

s5: discharging the seawater and sea sand mixture treated by the S4 into a nitrogen and phosphorus recovery tank, and adding the mixture into the nitrogen and phosphorus recovery tank according to the parts by weight: standing 80 parts of nitrogen recycling agent and 150 parts of phosphorus recycling agent for 2 hours, and processing the recycled nitrogen and phosphorus elements into fertilizer;

s6: and (4) continuously mixing the seawater and sea sand mixture treated by the S5 with cement and an auxiliary agent for treatment experiments, and finally forming the seawater and sea sand concrete with the grading design.

In S5, the nitrogen recovering agent is styrene resin, and the phosphorus recovering agent is aluminum salt and iron salt, and the mixing ratio is 1: 1.

The aluminum salt is aluminum hydroxide.

In S6, the seawater and sea sand mixture, cement and auxiliary agents are as follows according to parts by weight: 250 parts of seawater and sea sand mixture, 70 parts of cement and 45 parts of auxiliary agent.

The auxiliary agent comprises the following components in parts by weight: 3 parts of gypsum, 15 parts of broken stone, 1 part of water reducing agent and 2 parts of fly ash.

Test example

For the hardness test of concrete, the index data tested by those skilled in the art are as follows:

1. the thickness of the puffball is as follows: the method is characterized in that the larger the Vibro consistency of the truncated cone-shaped concrete mixture formed by an index standard method is, the smaller the slump of the concrete mixture is, and the Vibro consistency is mainly used for evaluating whether the performance of the mixture meets the construction requirements of concrete or not.

2. Standard curing 28 days compressive strength: the concrete tensile strength is the axial tensile strength of concrete, namely the stress value obtained by dividing the maximum load borne by a concrete sample when the concrete sample is broken after being subjected to tension by the sectional area, and the strength of the concrete sample cured to 28 days of age is taken as the strength value of the on-site concrete member to be checked and accepted according to the current national detection standard so as to judge whether the on-site concrete strength is qualified.

3. Content of chloride ion: the maximum weight percentage of chloride ions in the allowable standard volume of various different concretes in national standards is referred to. The chloride ion has small radius and high activity, is easy to penetrate through a concrete passive film to cause steel bar corrosion, and the generated ferrous hydroxide is decomposed into water and ferrous oxide with crystal water to cause volume expansion durability reduction, so that the detection of the chloride ion content in the concrete is an important measure for ensuring the structural durability.

The tests performed on the seawater sea sand concrete of examples 1-5 and the prior art show the following data:

as can be seen from the above table, the ratio of nitrogen to phosphorus is reduced by 0.2-0.6 in the seawater sea sand concrete gradation design method of the present invention, thereby improving the recovery rate of nitrogen and phosphorus, and saving resources, and experiments are performed through different gradations, the seawater sea sand concrete in embodiment 3 performs best, wherein the vicious degree is 9s, so that the slump is 230mm, the larger the vicious degree of the concrete mixture of the concrete is, the smaller the slump is, and meanwhile, the compressive strength of standard curing for 28 days is as high as 29.3MPa, so for embodiments 1-5 of the present invention, embodiment 3 is the most optimal seawater sea sand concrete gradation design, and meanwhile, for the de-organic treatment of the seawater sea sand mixture, the solidification force of the concrete can be effectively improved, and the present invention has more popularization advantages.

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.