CN113045274A - C30 concrete and preparation method thereof - Google Patents

Abstract

The application relates to the field of concrete preparation technology, and particularly discloses C30 concrete and a preparation method thereof. The C30 concrete comprises the following components: cement, fly ash, sand, broken stone, water, a water reducing agent, kudzu fiber, a bamboo pulp lignin dispersing agent and rubber powder, wherein the kudzu fiber is subjected to modification treatment; the preparation method comprises the following steps: s1: mixing cement, fly ash, sand, broken stone, kudzu fiber, bamboo pulp lignin dispersant, rubber powder and water, and stirring for 40-60s to obtain a mixture; s2: and adding water and a water reducing agent into the mixture, and stirring for 60-90s to obtain the C30 concrete. The C30 concrete has the advantage of enhancing the crack resistance of the concrete.

Description

C30 concrete and preparation method thereof

Technical Field

The application relates to the field of concrete preparation technology, in particular to C30 concrete and a preparation method thereof.

Background

The common concrete is artificial stone which is prepared by taking cement as a main cementing material, adding water, sand, stones, chemical additives and mineral admixtures if necessary, mixing the materials according to a proper proportion, uniformly stirring, densely molding, curing and hardening. The concrete strength is the most important index in the concrete use performance. The concrete strength grade is divided by a cube compressive strength standard value, and the common concrete strength grade is divided into 14 grades: c15, C20, C25, C30, C35, C40, C45, C50, C55, C60, C65, C70, C75 and C80.

In the related art, as disclosed in the application No. 201710322578.2, a C30 concrete is provided, wherein each cubic C30 concrete is composed of the following raw materials by weight: 304-315 kg of cement, 400-410 kg of river sand, 400-410 kg of machine-made sand, 200-210 kg of recycled aggregate with the particle size of 5-10mm, 785-805 kg of recycled aggregate with the particle size of 10-25mm, 82-88 kg of tap water, 82-88 kg of recycled water of a concrete mixing plant, 51-57 kg of S75-grade mineral powder, 6.9-7.7 kg of an additive and 1.9-2.3 kg of a retarder. The workability of the prepared concrete is greatly changed, the use of tap water is reduced, and the recycled aggregate is obtained by crushing, processing and screening construction waste, so that the ecological environment is effectively protected while the material cost is saved.

In view of the above related technologies, the inventor believes that in the actual application process of the C30 concrete, the bonding force between the recycled aggregate and the cementitious material is lower than that of the primary aggregate, and cracks and gaps are easily generated in the recycled aggregate during the processing process, so that the crack resistance of the prepared concrete does not reach the standard.

Disclosure of Invention

In order to enhance the crack resistance of concrete, the application provides C30 concrete and a preparation method thereof.

In a first aspect, the present application provides a C30 concrete, which adopts the following technical solutions:

the C30 concrete is prepared from the following raw materials in parts by weight: 270 parts of cement, 40-50 parts of fly ash, 730 parts of sand, 700 parts of sand, 900 parts of broken stone, 180kg of water, 4-6 parts of a water reducing agent, 12-15 parts of kudzu fiber, 5-10 parts of a bamboo pulp lignin dispersing agent and 8-10 parts of rubber powder, wherein the kudzu fiber is subjected to modification treatment.

Through adopting above-mentioned technical scheme, the adaptability of kudzu vine root-hemp is strong, and it is very extensive to grow, and the planting cycle is short, consequently, the kudzu vine root-hemp fibre is a cheap renewable resource that easily gets, and the kudzu vine root-hemp fibre has elasticity good, tensile force is strong, moisture-resistant, corrosion-resistant advantage, and the main chemical composition of kudzu vine root-hemp fibre is: 32.79% of cellulose, 21.09% of hemicellulose, 13.45% of lignin, 5.69% of pectin, 25.22% of water-soluble substances, 1.75% of lipid wax and the like. The natural kudzu-hemp original hemp fiber is distributed with a large amount of colloid on the surface, the colloid is attached to the fiber surface, so that only a small amount of bundle fibers are exposed, the fiber uniformity is poor, cellulose components in the natural kudzu-hemp original hemp fiber comprise kudzu-hemp fibrils, and the kudzu-hemp fibrils are bonded together to form a process fiber with poor quality, the surface of the process fiber is uneven, and a plurality of longitudinal gaps and holes are formed.

If the natural kudzu vine hemp fiber is directly used in concrete, the reinforcing effect on the concrete is weaker, and the kudzu vine hemp resource is wasted, so that the kudzu vine hemp fiber is modified, the appearance of the modified kudzu vine hemp fiber is smooth in surface, good in fiber separation, clear in outline and good in overall performance. The modified kudzu vine hemp fiber can be bonded and adsorbed with aggregate and cementing material when added into concrete, so that the binding force between the cementing material and the aggregate in the concrete is improved, the integrity of the hardened concrete is improved, the problem that cracks are easily generated on the hardened surface of the concrete is further reduced, and the crack resistance of the concrete is enhanced.

The bamboo pulp lignin dispersing agent has good adaptability to the kudzu fiber, has strong dispersing performance and low price, and can reduce the static friction coefficient between the kudzu fiber by adding the bamboo pulp lignin dispersing agent into the raw materials, so that the kudzu fiber is uniformly dispersed in the mixing process without agglomeration and aggregation, and the aggregate can be better agglomerated sand, thereby better improving the integrity of concrete and enhancing the anti-cracking performance of the concrete.

Preferably, the process for modifying the kudzu fiber comprises the following steps:

s1: cutting the kudzu into kudzu fiber bundle sections with the length of 1-3 cm;

s2: soaking the kudzu fiber bundle section in a sodium hypochlorite solution for 20-24h to form kudzu fiber;

s3: steaming and boiling radix Puerariae hemp fiber in sodium hydroxide solution for 60-80min, taking out, and air drying;

s4: adding nano magnesium oxide, polyvinyl alcohol and deionized water into the air-dried kudzu fiber, stirring for 2-3h, standing for 20-24h, and drying at the temperature of less than or equal to 70 ℃ to obtain the modified kudzu fiber.

Through adopting above-mentioned technical scheme, soak the kudzu vine root-hemp fibre in sodium hypochlorite solution, sodium hypochlorite solution permeates and gets into between fibre and the fibre to effectively decompose the colloid, form and separate better single fiber, then the single fiber is cooked in the high temperature in the sodium hydroxide solution, and sodium hydroxide further gets rid of the colloid and other impurity on fibre surface, and high temperature causes the recrystallization of kudzu vine root-hemp fibre, and the elasticity and the pulling force of fibre all have showing and promote.

The modification effect of the nano magnesium oxide and the polyvinyl alcohol is mainly shown as follows: nanometer magnesium oxide granule makes the micropore enlarge through inserting the inside of the ramie fiber microporous structure, then polyvinyl alcohol is on the ramie fiber surface, can form the weak electric field with the ramie fiber, make the micromolecule that has the functional group more easily adsorbed by the fibre, and then improve the hydrophobicity of ramie fiber in the concrete slurry, make it have slower water absorption rate, absorb water as little as possible in early stage, reduce the influence to concrete workability, there is certain water absorption capacity in later stage, guarantee to have sufficient water to carry out the maintenance to the concrete, reduce the easy problem of ftractureing during the concrete maintenance.

Preferably, the concentration of the sodium hypochlorite is 9-12%.

Through adopting above-mentioned technical scheme, select sodium hypochlorite's concentration in above-mentioned scope, be favorable to sodium hypochlorite fully to permeate and get into between the fibre to effectively decompose colloid, the sodium hypochlorite solution of above-mentioned concentration within range is unlikely to corrode fibre self simultaneously, is favorable to the ramie fibre to keep good performance.

Preferably, the concentration of the sodium hydroxide is 20-25%; the high temperature cooking temperature is 80-100 ℃.

By adopting the technical scheme, the sodium hydroxide in the range reduces the amorphous colloid content on the surface of the fiber, the boiling in the temperature range causes the recrystallization of the kudzu fiber, the crystallinity of the fiber is relatively increased, the crystallinity of the kudzu fiber is generally increased, the cleanliness is higher, the structure is more regular, the molecular arrangement in the kudzu fiber is more ordered, the bonding force between molecules is enhanced, and the corrosion resistance and the tensile property of the fiber are improved.

Preferably, the particle size of the rubber powder is 0.20-0.40 mm.

By adopting the technical scheme, the rubber powder is solid waste processed from waste automobile tires, and the rubber powder is added in the concrete preparation process to play a role in stable gluing, so that the aggregates are better combined, the connection toughness between the aggregates is improved, meanwhile, the rubber powder has certain ductility, the phenomenon of cracking of the concrete caused by overlarge temperature difference can be reduced, and the rubber powder also meets the industrial requirements of low carbon and environmental protection development in China when used in the concrete.

Preferably, the raw materials also comprise 6-8 parts of MPP particles.

By adopting the technical scheme, the MPP particles are particles made of modified polypropylene and resin, the porosity between broken stones can be reduced to the maximum extent by adding the MPP particles into concrete, the using amount of a cementing material is saved, the MPP particles are favorable for better fatigue resistance, friction resistance and good size stability, and the crack resistance and durability of the concrete can be enhanced.

In a second aspect, the present application provides a method for preparing C30 concrete, which adopts the following technical scheme:

a preparation method of C30 concrete comprises the following preparation steps:

s1: mixing cement, fly ash, sand, broken stone, kudzu fiber, bamboo pulp lignin dispersant, rubber powder and water, and stirring for 40-60s to obtain a mixture;

s2: and adding water and a water reducing agent into the mixture, and stirring for 60-90s to obtain the C30 concrete.

By adopting the technical scheme, the preparation method is simple and easy to operate, is suitable for large-scale popularization, and the prepared concrete has good working performance and excellent anti-cracking performance.

Preferably, MPP particles are also added in the step S1.

Through adopting above-mentioned technical scheme, add the MPP granule in S1, help the MPP granule intensive mixing even between the aggregate, the later stage of being convenient for is stable with the aggregate and is bonded to the reinforcing effect of performance MPP granule that can be better.

In summary, the present application has the following beneficial effects:

1. the modified kudzu vine hemp fiber is smooth in appearance, good in fiber separation, clear in outline, good in elasticity and strong in tension, and can be bonded and adsorbed with aggregate and cementing material in the concrete, so that the binding force between the cementing material and the aggregate in the concrete is improved, and the anti-cracking performance of the concrete is further enhanced.

2. The preferred bamboo pulp lignin dispersant that adopts carries out dispersion treatment to the pueraria lobata fibre in this application, is favorable to reducing the coefficient of static friction between the pueraria lobata fibre, and the pueraria lobata fibre is mixing in-process dispersion even to the wholeness of better improvement concrete, the anti-cracking performance of reinforcing concrete.

3. The concrete raw material of this application still including the rubber powder, the rubber powder can play stable veneer effect for combine better between the aggregate, improve the connection toughness between the aggregate, the rubber powder has certain ductility simultaneously, can reduce the phenomenon that the concrete bursts because of the too big emergence that leads to of the difference in temperature.

Detailed Description

The present application will be described in further detail with reference to examples.

The cement is purchased from a West Anhui conch cement plant, and is common Portland cement with the label of P.O42.5;

the fly ash is purchased from Shanxi Zhengyuan environmental protection technology Limited company, and the specific surface area of the fly ash is 300-²Kg, loss on ignition not more than 2%;

sand is purchased from Shanxi Longze Anomao Kogyo Co., LtdHas an apparent density of 2350kg/m³The grain diameter is 1.8-2.2mm, and the water content is 1.1%;

the crushed stone is purchased from Shanxi Longze Anomao GmbH, and has an apparent density of 2750kg/m³The grain diameter is 4.75-25mm, and the water content is 1.2%;

the water reducing agent is purchased from Shandong Tongsheng additive building materials Co, Ltd, and the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent;

the bamboo pulp lignin dispersant is purchased from Jinyu Yuan sourced from Jinnan, Biotechnology, Inc;

the barium stearate dispersant is purchased from Jinyuyuan biotechnology, Jinan, Co.Ltd;

the rubber powder is purchased from Guangxi ancient cooking materials science and technology company;

the MPP particles are purchased from Yingkou Daming practice Co., Ltd, and the particle size of the MPP particles is 2 +/-0.2 mm.

Preparation example of Kudzuvine fiber

Preparation example 1

S1: cutting the kudzu into kudzu fiber bundle sections with the length of 1 cm;

s2: weighing 20kg of kudzu fiber bundle sections, soaking the kudzu fiber bundle sections in a sodium hypochlorite solution with the mass concentration of 9% for 20h, and fishing out after soaking to obtain kudzu fiber;

s3: steaming and boiling the kudzu vine hemp fiber in a sodium hydroxide solution with the mass concentration of 20% for 60min at the temperature of 80 ℃, and naturally airing after the steaming and boiling;

s4: adding 3kg of nano magnesium oxide, 3kg of polyvinyl alcohol and 4kg of deionized water into the air-dried kudzu hemp fibers, stirring for 2h, standing for 20h, and then drying the kudzu hemp fibers in an oven at the temperature of 50 ℃ for 2h to obtain the modified kudzu hemp fibers.

Preparation example 2

S1: cutting the kudzu into kudzu fiber bundle sections with the length of 2 cm;

s2: weighing 20kg of kudzu fiber bundle sections, soaking the kudzu fiber bundle sections in a sodium hypochlorite solution with the mass concentration of 10% for 22h, and fishing out after soaking to obtain kudzu fiber;

s3: steaming and boiling the kudzu vine hemp fiber in 23% sodium hydroxide solution at 90 ℃ for 70min, and naturally drying after the steaming and boiling;

s4: adding 3kg of nano magnesium oxide, 3kg of polyvinyl alcohol and 4kg of deionized water into the air-dried kudzu hemp fiber, stirring for 2.5h, standing for 22h, and then drying the kudzu hemp fiber in an oven at the temperature of 60 ℃ for 2h to obtain the modified kudzu hemp fiber.

Preparation example 3

S1: cutting the kudzu into kudzu fiber bundle sections with the length of 3 cm;

s2: weighing 20kg of kudzu fiber bundle sections, soaking the kudzu fiber bundle sections in a sodium hypochlorite solution with the mass concentration of 12% for 22h, and fishing out after soaking to obtain kudzu fiber;

s3: steaming and boiling the kudzu vine hemp fiber in 25% sodium hydroxide solution at 100 ℃ for 80min, and naturally drying after the steaming and boiling;

s4: adding 3kg of nano magnesium oxide, 3kg of polyvinyl alcohol and 4kg of deionized water into the air-dried kudzu hemp fiber, stirring for 3h, standing for 24h, and then drying the kudzu hemp fiber in an oven at the temperature of 70 ℃ for 1h to obtain the modified kudzu hemp fiber.

Examples

Example 1

The C30 concrete is prepared from the following raw materials in parts by weight:

250kg of cement, 40kg of fly ash, 700kg of sand, 1100kg of gravel, 160kg of water, 4kg of water reducing agent, 12kg of kudzu fiber, 5kg of bamboo pulp lignin dispersant and 8kg of rubber powder; the kudzu fiber prepared in the preparation example 1 is selected as the kudzu fiber, and the particle size of the rubber powder is 0.20 mm.

The C30 concrete is prepared by the following steps:

s1: mixing cement, fly ash, sand, broken stone, kudzu fiber, bamboo pulp lignin dispersant, rubber powder and water, and stirring for 40s to obtain a mixture;

s2: and adding water and a water reducing agent into the mixture, and stirring for 60s to obtain the C30 concrete.

Example 2

The C30 concrete is prepared from the following raw materials in parts by weight:

260kg of cement, 45kg of fly ash, 720kg of sand, 1000kg of broken stone, 170kg of water, 5kg of water reducing agent, 14kg of kudzu fiber, 8kg of bamboo pulp lignin dispersant and 9kg of rubber powder; the kudzu fiber prepared in the preparation example 1 is selected as the kudzu fiber, and the particle size of the rubber powder is 0.20 mm.

The C30 concrete is prepared by the following steps:

s1: mixing cement, fly ash, sand, broken stone, kudzu fiber, bamboo pulp lignin dispersant, rubber powder and water, and stirring for 50s to obtain a mixture;

s2: and adding water and a water reducing agent into the mixture, and stirring for 70s to obtain the C30 concrete.

Example 3

The C30 concrete is prepared from the following raw materials in parts by weight:

270kg of cement, 50kg of fly ash, 730kg of sand, 900kg of broken stone, 180kg of water, 6kg of water reducing agent, 15kg of kudzu fiber, 10kg of bamboo pulp lignin dispersant and 10kg of rubber powder; the kudzu fiber prepared in the preparation example 1 is selected as the kudzu fiber, and the particle size of the rubber powder is 0.20 mm.

The C30 concrete is prepared by the following steps:

s1: mixing cement, fly ash, sand, broken stone, kudzu fiber, bamboo pulp lignin dispersant, rubber powder and water, and stirring for 60s to obtain a mixture;

s2: and adding water and a water reducing agent into the mixture, and stirring for 90s to obtain the C30 concrete.

Example 4

A C30 concrete, differing from example 1 in that: in this example, the kudzu fiber obtained in preparation example 2 was used.

Example 5

A C30 concrete, differing from example 1 in that: in this example, the kudzu fiber obtained in preparation example 3 was used.

Example 6

A C30 concrete, differing from example 5 in that: the particle size of the rubber powder in this example was 0.3 mm.

Example 7

A C30 concrete, differing from example 5 in that: the particle size of the rubber powder in this example was 0.4 mm.

Example 8

A C30 concrete, differing from example 7 in that: in this example, 6kg of MPP granules were added, and the MPP granules were added in step S1.

Example 9

A C30 concrete, differing from example 7 in that: in this example, 7kg of MPP granules were added, and the MPP granules were added in step S1.

Example 10

A C30 concrete, differing from example 7 in that: in this example, 8kg of MPP granules were added, and the MPP granules were added in step S1.

Comparative example

Comparative example 1

The C30 concrete is prepared from the following raw materials in parts by weight:

310kg of cement, 400kg of river sand, 800kg of stones, 4kg of water reducing agent and 200kg of water.

The C30 concrete is prepared by the following steps:

mixing cement, river sand, stones, a water reducing agent and water, and stirring for 60s to obtain the C30 concrete.

Comparative example 2

A C30 concrete, differing from example 1 in that: in this comparative example, the kudzu fiber was added without modification.

Comparative example 3

A C30 concrete, differing from example 1 in that: in this comparative example, no bamboo pulp lignin dispersant was added.

Comparative example 4

A C30 concrete, differing from example 1 in that: the comparative example used a barium stearate dispersant.

Comparative example 5

A C30 concrete, differing from example 1 in that: no rubber powder was added in this comparative example.

Performance test

Test-compressive Strength test

Test samples: the concrete mixtures obtained in examples 1 to 10 were used as test samples 1 to 10, and the concrete mixtures obtained in comparative examples 1 to 5 were used as control samples 1 to 5.

The test method comprises the following steps: according to GB/T50081-2016 standard of mechanical property test method of common concrete, examples 1-10 and comparative examples 1-5 are made into standard test blocks, and the number of cracks in unit area and the total cracking area in unit area are obtained by measuring after C30 concrete is poured for 24 hours.

The test instrument: concrete crack resistance test standard mould

And (3) test results: the test results of the test samples 1 to 10 are shown in Table 1, and the test results of the control samples 1 to 5 are shown in Table 2.

TABLE 1 test sample 1-10 results of crack resistance test

As can be seen from table 1, when comparing the test samples 4 and 5 with the test samples 1 to 3, the C30 concrete prepared by using the kenaf fiber of preparation example 3 has a reduced number of cracks per unit area and a reduced total cracked area per unit area compared with the concrete prepared by using the kenaf fibers of preparation examples 1 and 2, which indicates that the kenaf fiber modified by the preparation example 3 has a significant effect of improving the crack resistance of the concrete.

As can be seen from Table 1, when the test samples 6, 7 and 5 are compared, the anti-cracking performance of the concrete can be improved when the particle size of the rubber powder is within the range of 0.20-0.40mm, and within the range of 0.20-0.40mm, the ductility of the rubber powder is enhanced along with the increase of the particle size of the rubber powder, so that the stable gluing effect on the aggregate is more remarkable, the number of cracks in unit area of the sample 7 is less, and the total cracking area in unit area is smaller.

As can be seen from table 1, when the MPP particles are added in the preparation of the C30 concrete by comparing the test samples 8, 9, 10 with the test sample 7, the number of cracks per unit area and the total cracking area per unit area are reduced, which indicates that the MPP particles can effectively enhance the crack resistance of the concrete due to their good fatigue resistance, friction resistance and dimensional stability.

TABLE 2 test results of crack resistance of control samples 1-5

As can be seen from tables 1 and 2, when comparing the test samples 1 to 3 with the control sample 1, the number of cracks per unit area and the total cracking area per unit area of the C30 concrete added with the modified Kudzuvine fiber are significantly reduced, which indicates that the addition of the modified Kudzuvine fiber can improve the binding force between the cementing material and the aggregate in the concrete, improve the integrity of the hardened concrete, and further reduce the problem that cracks are easily generated on the surface of the hardened concrete.

As can be seen from tables 1 and 2, when the test samples 1 to 3 are compared with the control sample 1 and the control sample 2, although the crack resistance of the control sample 2 is improved compared with that of the control sample 1, the crack resistance of the concrete is not maximized because the pueraria hemp fiber is not modified, a large amount of colloid is distributed on the surface of the pueraria hemp fiber, and the uniformity of the fiber is poor, and thus, the crack resistance of the concrete is not obviously improved by directly adding the natural pueraria hemp fiber, and the pueraria hemp resource is wasted.

As can be seen from tables 1 and 2, when comparing the comparative sample 3 with the test samples 1 to 3, the bamboo pulp lignin dispersant is added into the comparative samples 1 to 3, so that the static friction coefficient between the kudzu fiber is reduced, the kudzu fiber is uniformly dispersed in the mixing process, the dispersibility of the kudzu fiber is enhanced, the crack resistance of the C30 mixed curd is further enhanced, and the number of cracks in unit area and the total crack area in unit area of the test samples 1 to 3 are reduced compared with the comparative sample 3.

As can be seen from tables 1 and 2, when comparing the comparison samples 1 to 3, the comparison sample 3 and the comparison sample 4, the addition of the common barium stearate dispersant has no obvious dispersing effect on the pueraria hemp fiber, and is almost not different from the addition of no dispersant, which indicates that the bamboo pulp lignin dispersant has good adaptability to the pueraria hemp fiber, has strong dispersibility, and can better help the pueraria hemp fiber to be uniformly dispersed in the concrete, thereby improving the performance of the concrete.

As can be seen from tables 1 and 2, when the comparison sample 5 is compared with the test samples 1 to 3, the number of cracks per unit area and the total cracking area per unit area of the comparison sample 5 are increased, which indicates that the rubber powder is added to play a role in stabilizing the gluing effect when preparing the C30 concrete, and the connection toughness between the aggregates is improved, so that the anti-cracking performance of the concrete is improved.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (8)

1. The C30 concrete is characterized in that the C30 concrete is prepared from the following raw materials in parts by weight: 270 parts of cement, 40-50 parts of fly ash, 730 parts of sand, 700 parts of sand, 900 parts of broken stone, 180kg of water, 4-6 parts of a water reducing agent, 12-15 parts of kudzu fiber, 5-10 parts of a bamboo pulp lignin dispersing agent and 8-10 parts of rubber powder, wherein the kudzu fiber is subjected to modification treatment.

2. The C30 concrete according to claim 1, wherein: the process for modifying the kudzu fiber comprises the following steps:

s1: cutting the kudzu into kudzu fiber bundle sections with the length of 1-3 cm;

s2: soaking the kudzu fiber bundle section in a sodium hypochlorite solution for 20-24h to form kudzu fiber;

s3: steaming and boiling radix Puerariae hemp fiber in sodium hydroxide solution for 60-80min, taking out, and air drying;

s4: adding nano magnesium oxide, polyvinyl alcohol and deionized water into the air-dried kudzu fiber, stirring for 2-3h, standing for 20-24h, and drying at the temperature of less than or equal to 70 ℃ to obtain the modified kudzu fiber.

3. The C30 concrete according to claim 2, wherein: the concentration of the sodium hypochlorite is 9-12%.

4. The C30 concrete according to claim 2, wherein: the concentration of the sodium hydroxide is 20-25%; the high temperature cooking temperature is 80-100 ℃.

5. The C30 concrete according to claim 1, wherein: the particle size of the rubber powder is 0.20-0.40 mm.

6. The C30 concrete according to claim 1, wherein: the raw materials also comprise 6-8 parts of MPP particles.

7. A method of making the C30 concrete of any one of claims 1-6, wherein: comprises the following preparation steps:

s1: mixing cement, fly ash, sand, broken stone, kudzu fiber, bamboo pulp lignin dispersant, rubber powder and water, and stirring for 40-60s to obtain a mixture;

s2: and adding water and a water reducing agent into the mixture, and stirring for 60-90s to obtain the C30 concrete.

8. The method for preparing C30 concrete according to claim 7, wherein: MPP particles are also added in the step S1.