CN112707705A

CN112707705A - Concrete doped with fly ash for improving performance and reducing hydration heat and preparation method thereof

Info

Publication number: CN112707705A
Application number: CN202110093897.7A
Authority: CN
Inventors: 谭劲华; 林咏乾
Original assignee: Guangzhou Honglei Concrete Co ltd
Current assignee: Guangzhou Honglei Concrete Co ltd
Priority date: 2021-01-23
Filing date: 2021-01-23
Publication date: 2021-04-27

Abstract

The application relates to the field of concrete, and particularly discloses concrete doped with fly ash for improving performance and reducing hydration heat and a preparation method thereof. The concrete doped with the fly ash for improving performance and reducing hydration heat comprises the following components in parts by weight: cement 240-; 800 portions of sand and 850 portions of sand; stone 1050-; 150 portions of water and 170 portions of water; 50-60 parts of fly ash; 5-8 parts of a water reducing agent; 3-8 parts of zinc chromate; 1-3 parts of starch; the preparation method comprises the following steps: the components are stirred and mixed evenly, and then the concrete doped with the fly ash, which improves the performance and reduces the hydration heat, is obtained after curing and forming. The product of the application can be used in various building constructions, and has the advantages that the bleeding rate and the early strength are not easily influenced.

Description

Concrete doped with fly ash for improving performance and reducing hydration heat and preparation method thereof

Technical Field

The application relates to the field of concrete, in particular to concrete doped with fly ash for improving performance and reducing hydration heat and a preparation method thereof.

Background

The concrete is artificial stone which is prepared by taking cement as a main cementing material, adding water, sand, stones and chemical additives and mineral admixtures if necessary, mixing the materials according to a proper proportion, uniformly stirring, densely molding, curing and hardening.

The fly ash is fine ash collected from flue gas generated after coal combustion, is main solid waste discharged by a coal-fired power plant, and is one of industrial waste residues with large current discharge capacity in China. Meanwhile, the fly ash is a pozzolanic material, a series of properties of the concrete can be improved after a proper amount of fly ash is added in the process of mixing the concrete, not only can part of cement be replaced, the production cost of the concrete is reduced, and the ecological environment is protected, but also the fly ash can perform secondary hydration reaction with calcium hydroxide crystals in the concrete at normal temperature, and the post-strength and the impermeability of the concrete are improved.

In view of the above-mentioned prior art, the inventor believes that the fly ash has a lower particle density than cement, and the fly ash has a better dispersibility than cement, and is not easy to form flocculation, so that the fly ash is easy to float to the surface of the concrete during concrete vibrating operation to form floating slurry, which easily affects the bleeding rate and early strength performance of the concrete, so that the final setting time of the concrete is prolonged, and further affects the construction period and efficiency, and thus there is still room for improvement.

Disclosure of Invention

In order to reduce the influence of the fly ash on the bleeding rate and the early strength performance of the concrete, the application provides the concrete with the fly ash mixed, the performance of the concrete is improved, and the hydration heat is reduced, and a preparation method of the concrete.

In a first aspect, the present application provides a concrete doped with fly ash for improving performance and reducing hydration heat, which adopts the following technical scheme:

the concrete doped with fly ash for improving performance and reducing hydration heat is characterized in that: the paint comprises the following components in parts by mass:

cement 240-;

800 portions of sand and 850 portions of sand;

stone 1050-;

150 portions of water and 170 portions of water;

50-60 parts of fly ash;

5-8 parts of a water reducing agent;

3-8 parts of zinc chromate;

1-3 parts of starch.

By adopting the technical scheme, the zinc chromate and the starch are added to be matched with each other in a synergistic manner, so that the fly ash is not easy to float upwards in the concrete vibrating process, the bleeding rate of the concrete is favorably reduced, the early compressive strength of the concrete is favorably improved better, the concrete can reach the required strength standard more easily and quickly, the construction period of the concrete is favorably shortened, and the construction efficiency is improved.

The inventor guesses that the starch added into the concrete may form floccules with the fly ash, thereby being beneficial to the sedimentation of the fly ash, and the zinc chromate is beneficial to improving the dispersity of the floccules formed by combining the starch and the fly ash, so that the floccules formed by combining the starch and the fly ash are better dispersed in the concrete, and the concrete is better reinforced, thereby the early strength of the concrete is less susceptible.

Preferably, the feed also comprises the following components in parts by mass:

2-5 parts of potassium borate.

Through adopting above-mentioned technical scheme, cooperate through adding potassium borate and zinc chromate and starch each other, be favorable to promoting the subsidence of fly ash better for the laitance appears more difficult to in the concrete that makes in the process of vibrating, still is favorable to reinforcing the concrete better, makes the early strength of concrete be difficult to receive the influence more.

Preferably, the water reducing agent is prepared by uniformly mixing a polycarboxylic acid water reducing agent and lignosulfonate in a mass ratio of 3-7: 1.

Preferably, the water reducing agent is prepared by uniformly mixing a polycarboxylic acid water reducing agent and lignosulfonate in a mass ratio of 4: 1.

By adopting the technical scheme, the polycarboxylate water reducing agent and the lignosulfonate which are in specific dosage proportion are matched with each other in a synergistic manner, so that the water reducing agent is favorably adapted to starch, the floating slurry is not easily generated in the vibrating process of the concrete by the fly ash, and the bleeding rate of the concrete is favorably reduced.

Preferably, the lignosulfonate is any one of potassium lignosulfonate and calcium lignosulfonate.

By adopting the technical scheme, the potassium lignosulfonate or calcium lignosulfonate and the polycarboxylate water reducing agent are mutually cooperated to form the water reducing agent, so that the cement hydration speed can be accelerated, the early strength of the concrete can be improved better, the early strength of the concrete is not influenced by the fly ash easily, the strength requirement of the concrete can be reached faster in the curing process, the construction period of the concrete can be shortened, the construction efficiency can be improved, and the application range of the concrete can be wider.

Preferably, the feed also comprises the following components in parts by mass:

3-6 parts of barium chromate.

By adopting the technical scheme, the early strength of the concrete is favorably improved by adding the barium chromate, so that the early compressive strength of the concrete is not easily influenced by the fly ash.

Preferably, the feed also comprises the following components in parts by mass:

2-4 parts of calcium carbonate.

By adopting the technical scheme, the calcium carbonate and the barium chromate are added to be matched with each other in a synergistic manner, so that the early strength effect of the barium chromate is favorably promoted, the early compressive strength of the concrete is better, the concrete can more easily reach the required strength standard in the subsequent curing process, the construction period of the concrete is favorably shortened, the construction efficiency is improved, and the application range of the concrete is favorably and better expanded.

Preferably, the feed also comprises the following components in parts by mass:

and 1-4 parts of triethanolamine.

By adopting the technical scheme, the triethanolamine is added, so that the cement hydration speed can be accelerated, the development of the early strength of the concrete can be promoted, and the early strength of the concrete is not easily influenced by the fly ash.

In a second aspect, the present application provides a method for preparing a concrete doped with fly ash to improve performance and reduce hydration heat, which adopts the following technical scheme:

a preparation method of concrete doped with fly ash for improving performance and reducing hydration heat comprises the following steps:

step (1), mixing cement and water, and uniformly stirring to form slurry;

adding the residual components of the concrete which are doped with the fly ash and have the performance improved and the hydration heat reduced into the slurry, and uniformly stirring to form a concrete mixture;

and (3) pouring the concrete mixture on a building to be constructed, and curing and forming to obtain the concrete doped with the fly ash, which improves the performance and reduces the hydration heat.

By adopting the technical scheme, the concrete can be obtained by uniformly stirring the components and curing and forming, the production operation is simple and convenient, and the industrial production is facilitated.

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

1. by adding the zinc chromate and the starch to be matched with each other in a synergistic manner, the bleeding rate of the concrete is favorably reduced, and meanwhile, the early compressive strength of the concrete is favorably improved, so that the concrete can more easily and quickly reach the required strength standard, the construction period of the concrete is favorably shortened, and the construction efficiency is improved.

2. Through adding the potassium borate, the zinc chromate and the starch to cooperate with each other, the sedimentation of the fly ash is favorably promoted better, so that the prepared concrete is less prone to generating laitance in the vibrating process, the concrete is further favorably reinforced better, and the early strength of the concrete is less prone to being influenced.

3. By controlling the composition and the dosage proportion of the water reducing agent, the early compressive strength of the concrete is improved while the bleeding rate of the concrete is reduced, so that the bleeding rate and the early strength of the concrete are not easily influenced by the fly ash.

4. By adding the barium chromate, the calcium carbonate and the triethanolamine to cooperate with each other, the cement hydration speed is favorably accelerated, the development of the early strength of the concrete is favorably promoted, and the early compressive strength of the concrete is less susceptible to the influence of the fly ash.

Detailed Description

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

In the following examples, P.O 42.5.5-grade portland cement manufactured by Shenzhen Changhua Xin building materials GmbH is used as the cement.

In the following examples, river sand having a particle size of 0.1 to 5mm from Xiansha stone materials trade Co., Ltd, Sha, Shang Wu City, is used.

In the following examples, crushed stone having a particle size of 0 to 30mm from Xinda construction, Inc., of Jinzhou city was used, and the mass ratio of the crushed stone having a particle size of 0 to 10mm to the crushed stone having a particle size of 10 to 30mm was 4: 6.

In the following examples, fly ash was first grade fly ash of 325 mesh size kt-01 from Kate mica works, Lingshu county.

In the following examples, the polycarboxylate water reducer is a polycarboxylate water reducer of type YBH-mercaptopropionic acid, manufactured by texan yunbaihui biotechnology limited.

In the following examples, potassium lignosulfonate was made by Hubei Bolan chemical Co., Ltd.

In the following examples, the calcium lignosulfonate was LW model LW from denningwaffle incorporated.

In the following examples, sodium lignosulfonate made by chemical Limited in Qinghai, Jinan, was 8061-51-6.

In the following examples, zinc chromate, available from Beijing lantai chemical technology Limited, as X700009 model number 13530-65-9, was used.

In the following examples, 9004-34-36, a starch from Haidao, Inc., of anykyu, was used as the starch.

In the following examples, potassium borate was prepared from 1332-77-0 available from Hubei Jiulong chemical Co., Ltd.

In the following examples, the barium chromate used was 10294-40-3, a model number of Shanghai Liong Biotech Co., Ltd.

In the following examples, model 471-34-1 calcium carbonate from Union Fine chemical, Inc., Jingzhou is used as the calcium carbonate.

In the following examples, triethanolamine was 102-71-6, available from Shanghai Pengpeng chemical Co., Ltd.

Example 1

The concrete doped with the fly ash and having the improved performance and the reduced hydration heat comprises the following components in parts by mass:

243kg of Portland cement; 850kg of river sand; 1037kg of crushed stone; 157kg of water; 57kg of fly ash; 8kg of water reducing agent; 7kg of zinc chromate; 3kg of starch.

In this embodiment, the water reducing agent is a polycarboxylic acid water reducing agent.

step (1), adding 243kg of Portland cement and 157kg of water into a stirrer, and uniformly stirring to form slurry;

step (2), adding 850kg of river sand, 1037kg of broken stone, 57kg of fly ash, 8kg of water reducing agent, 7kg of zinc chromate and 3kg of starch into the slurry formed in the step (1) while stirring, and uniformly stirring to form a concrete mixture;

and (3) uniformly pouring the concrete mixture formed by stirring in the step (2) on a building to be constructed, and curing for 30 days at the curing temperature of 20 ℃ and the humidity of 97% to obtain the concrete doped with the fly ash and having the performance improved and the hydration heat reduced.

Example 2

The difference from example 1 is that:

the concrete doped with the fly ash for improving the performance and reducing the hydration heat comprises the following components in mass:

240kg of Portland cement; 816kg of river sand; 1066kg of broken stones; 164kg of water; 60kg of fly ash; 6kg of water reducing agent; 8kg of zinc chromate; 2.3kg of starch.

In this embodiment, the water reducing agent is potassium lignosulfonate.

Example 3

The difference from example 1 is that:

250kg of Portland cement; 800kg of river sand; 1100kg of crushed stone; 150kg of water; 50kg of fly ash; 7kg of water reducing agent; 4.5kg of zinc chromate; 1.6kg of starch.

In the embodiment, the water reducing agent is prepared by uniformly mixing a polycarboxylic acid water reducing agent and sodium lignosulfonate in a mass ratio of 3: 1.

Example 4

The difference from example 1 is that:

246kg of Portland cement; 833kg of river sand; 1050kg of crushed stone; 170kg of water; 54kg of fly ash; 5kg of water reducing agent; 3kg of zinc chromate; 1kg of starch.

In the embodiment, the water reducing agent is prepared by uniformly mixing a polycarboxylic acid water reducing agent and potassium lignosulfonate in a mass ratio of 7: 1.

Example 5

The difference from example 1 is that:

245kg of Portland cement; 845kg of river sand; 1045kg of gravels; 160kg of water; 55kg of fly ash; 6kg of water reducing agent; 4kg of zinc chromate; 2kg of starch.

In the embodiment, the water reducing agent is prepared by uniformly mixing a polycarboxylic acid water reducing agent and calcium lignosulfonate in a mass ratio of 4: 1.

In summary, the amounts of the components of examples 1-5 are shown in Table 1, with the units of the amounts of the components in Table 1 being in kg.

TABLE 1

Example 6

The difference from example 1 is that:

the concrete with the fly ash added for improving the performance and reducing the hydration heat also comprises 2kg of potassium borate.

And (3) adding potassium borate in the step (2) along with river sand, broken stone, fly ash, a water reducing agent, zinc chromate and starch, stirring and preparing concrete.

Example 7

The difference from example 1 is that:

concrete with the fly ash added for improving performance and reducing hydration heat also comprises 5kg of potassium borate.

Example 8

The difference from example 1 is that:

the concrete with the fly ash added for improving the performance and reducing the hydration heat also comprises 3kg of barium chromate.

And (3) adding barium chromate into the mixture along with river sand, broken stone, fly ash, a water reducing agent, zinc chromate and starch in the step (2), stirring and preparing concrete.

Example 9

The difference from example 1 is that:

the concrete doped with fly ash to improve performance and reduce hydration heat also comprises 6kg of barium chromate and 2kg of calcium carbonate.

And (3) adding barium chromate and calcium carbonate in the step (2) along with river sand, broken stone, fly ash, a water reducing agent, zinc chromate and starch, stirring and preparing concrete.

Example 10

The difference from example 1 is that:

the concrete doped with fly ash to improve performance and reduce hydration heat also comprises 3kg of barium chromate and 4kg of calcium carbonate.

Example 11

The difference from example 1 is that:

the concrete with the fly ash added for improving the performance and reducing the hydration heat also comprises 4kg of calcium carbonate.

And (3) adding the calcium carbonate along with river sand, broken stone, fly ash, a water reducing agent, zinc chromate and starch in the step (2) and stirring to prepare concrete.

In summary, the amounts of the components of examples 6-11 are shown in Table 2, with the units of the amounts of the components in Table 2 being in kg.

TABLE 2

Example 12

The difference from example 1 is that:

the concrete with the fly ash added for improving the performance and reducing the hydration heat also comprises 1kg of triethanolamine.

And (3) adding triethanolamine in the step (2) along with river sand, broken stone, fly ash, a water reducing agent, zinc chromate and starch, stirring and preparing concrete.

Example 13

The difference from example 1 is that:

the concrete with the fly ash added for improving the performance and reducing the hydration heat also comprises 4kg of triethanolamine.

Example 14

The difference from example 5 is that:

the concrete doped with fly ash for improving performance and reducing hydration heat also comprises 2kg of potassium borate, 6kg of barium chromate, 2kg of calcium carbonate and 4kg of triethanolamine.

In the embodiment, the water reducing agent is prepared by uniformly mixing a polycarboxylic acid water reducing agent and calcium lignosulfonate in a mass ratio of 3: 1.

And (3) adding potassium borate, barium chromate, calcium carbonate and triethanolamine in the step (2) along with river sand, broken stone, fly ash, a water reducing agent, zinc chromate and starch, stirring and preparing concrete.

Example 15

The difference from example 5 is that:

the concrete doped with fly ash for improving performance and reducing hydration heat also comprises 5kg of potassium borate, 3kg of barium chromate, 4kg of calcium carbonate and 1kg of triethanolamine.

In the embodiment, the water reducing agent is prepared by uniformly mixing a polycarboxylic acid water reducing agent and calcium lignosulfonate in a mass ratio of 7: 1.

Example 16

The difference from example 5 is that:

the concrete doped with fly ash for improving performance and reducing hydration heat also comprises 4kg of potassium borate, 5kg of barium chromate, 3kg of calcium carbonate and 2kg of triethanolamine.

In summary, the amounts of each component of examples 12-16 are shown in Table 3, with the units for the amounts of each component in Table 3 being in kg.

TABLE 3

Comparative example 1

The difference from example 1 is that: equal amount of cement is used to replace fly ash, and equal amount of water is used to replace zinc chromate and starch.

Comparative example 2

The difference from example 1 is that: equal amounts of water were used in place of zinc chromate and starch.

Comparative example 3

The difference from example 1 is that: equal amount of water was used instead of zinc chromate.

Comparative example 4

The difference from example 1 is that: equal amounts of water were substituted for the starch.

Comparative example 5

The difference from comparative example 2 is that: the concrete with the fly ash added for improving the performance and reducing the hydration heat also comprises 2kg of potassium borate.

Potassium borate is added in step (2) to stir and prepare concrete.

In summary, the amounts of the components of comparative examples 1 to 4 are shown in Table 4, and the units of the amounts of the components in Table 4 are in kg.

TABLE 4

	Comparative example 1	Comparative example 2	Comparative example 3	Comparative example 4	Comparative example 5
						Portland cement	300	243	243	243	243
River sand	850	850	850	850	850
						Crushing stone	1037	1037	1037	1037	1037
Water (W)	167	167	164	160	167
						Fly ash	0	57	57	57	57
Water reducing agent	8	8	8	8	8
						Zinc chromate	0	0	0	7	0
Starch	0	0	3	0	0
						Potassium borate	0	0	0	0	2

Experiment 1

The concrete prepared according to the above examples and the comparative examples and doped with fly ash has improved performance and reduced hydration heat bleeding rate (%) according to the 12 bleeding test in GB/T50080-2016 Standard test method for Performance of ordinary concrete mixture.

Experiment 2

The concrete prepared according to the above examples and the comparative examples and doped with fly ash has improved performance and reduced hydration heat 3d, 7d, 28d and 90d compressive strength (MPa) according to 5 compressive strength tests in GB/T50081-2019 concrete physical and mechanical property test method Standard.

The data from the above experiments are shown in Table 5.

TABLE 5

According to the comparison of the data of comparative examples 1 to 5 in table 5, the bleeding rate of comparative examples 2 to 5 is higher than that of comparative example 1 when the fly ash is newly added to comparative example 1, and the 3d compressive strength, the 7d compressive strength and the 28d compressive strength of comparative examples 2 to 5 are lower than those of comparative example 1, which shows that the bleeding rate and the early strength of concrete are easily affected by adding the fly ash to the concrete; the 90d compressive strength of comparative examples 2-5 was higher than that of comparative example 1, indicating that the incorporation of fly ash was beneficial to some extent in improving the post strength of the concrete.

According to the comparison of the data of example 1 and comparative examples 2-4 in table 5, zinc chromate and starch are added on the basis of the doped fly ash in example 1, only fly ash is doped in comparative example 2, starch is added on the basis of the doped fly ash in comparative example 3, zinc chromate is added on the basis of the doped fly ash in comparative example 4, the bleeding rate of example 1 is lower than that of comparative examples 2-5, the early strength of example 1 is higher than that of comparative examples 2-5, and the fact that the zinc chromate and the starch are added to cooperate with each other is proved to be beneficial to promoting the precipitation of the fly ash, reducing the bleeding rate and reinforcing the early strength of concrete and improving the early strength of the concrete; the bleeding rate of the comparative example 3 is lower than that of the comparative example 2, and the early compressive strength performance is similar to that of the comparative example 2, which shows that the addition of the starch is beneficial to the sedimentation of the fly ash in the concrete vibrating process, so that the concrete is not easy to bleed, and the bleeding rate is reduced; the bleeding rate of comparative example 4 is similar to that of comparative example 2, and the early compressive strength is higher than that of comparative example 2, which shows that the addition of zinc chromate is beneficial to promoting the uniform dispersion of floccules formed by the fly ash and the starch, and is beneficial to reinforcing the early strength of concrete to a certain extent.

As can be seen from comparison of the data in examples 1 to 5 in Table 5, the water-reducing agents of examples 1 to 5 differ in composition and ratio of amount, and the water-reducing agents of polycarboxylic acid or potassium lignosulfonate alone were used as the water-reducing agents in examples 1 and 2, the water-reducing agents of polycarboxylic acid and sodium lignosulfonate mixed at a mass ratio of 3:1 as the water-reducing agents in example 3, the water-reducing agents of polycarboxylic acid and potassium lignosulfonate mixed at a mass ratio of 7:1 as the water-reducing agents in example 4, the water-reducing agents of polycarboxylic acid and calcium lignosulfonate mixed at a mass ratio of 4:1 as the water-reducing agents in example 5, whereas the water-bleeding rate of example 5 is lower than that of examples 3 to 2, and the early strength of examples 4 to 5 is higher than that of examples 1 to 3, indicating that the water-reducing agents are formed by blending the potassium lignosulfonate or calcium lignosulfonate with the polycarboxylic acid water-reducing agents, the early strength of the concrete can be better improved, and the polycarboxylate water reducing agent and the lignosulfonate in a specific proportion are cooperatively used as the water reducing agent, so that the bleeding rate of the concrete can be better reduced, and the fly ash is less prone to bleeding in the vibrating process.

Comparing the data of example 1, example 6-7 and comparative example 5 in table 5, the potassium borate is added in the examples 6-7 more than in example 1, while only potassium borate is added in the comparative example 5, and starch and zinc chromate are also lacked in the comparative example 5 compared with example 1, the bleeding rate of the examples 6-7 is lower than that of the example 1, and the early strength of the examples 6-7 is higher than that of the example 1, which shows that the potassium borate is added to promote the synergistic effect of the starch and the zinc chromate better, so that the bleeding rate of the concrete is reduced and the early strength of the concrete is improved; the bleeding rate and the early strength of the comparative example 5 are similar to those of the comparative example 2, which shows that the performance of the concrete is hardly affected by adding the potassium borate alone, and the effect can be achieved only when the potassium borate is synergistically matched with the starch and the zinc chromate.

From the comparison of the data of example 1 and examples 8 to 11 in table 5, it can be seen that in example 8, the component barium chromate is newly added compared with example 1, the bleeding rate of example 8 is lower than that of example 1, and the early strength of example 8 is higher than that of example 1, which indicates that the early strength of concrete is improved by adding barium chromate; examples 9 to 10 newly added barium chromate and calcium carbonate as components in example 1, the bleeding rate of examples 9 to 10 was lower than that of example 8, and the early strength of examples 9 to 10 was higher than that of example 8, which shows that the addition of calcium carbonate and barium chromate in synergistic combination is advantageous for better enhancing the reinforcing effect of barium chromate, resulting in higher early strength of concrete; example 11 the calcium carbonate component was added more recently than example 1, and the bleeding rate and early strength of example 11 were similar to those of example 1, indicating that the addition of calcium carbonate alone had little effect on the performance of concrete, and that the effect was obtained only when calcium carbonate was synergistically combined with barium chromate.

As can be seen from the comparison of the data of example 1 and examples 12 to 13 in Table 5, the early strength of examples 12 to 13 is higher than that of example 1 when triethanolamine, which is a new component, is added to examples 12 to 13 than to example 1, indicating that the early strength of concrete is advantageously improved by adding triethanolamine.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The concrete doped with fly ash for improving performance and reducing hydration heat is characterized in that: the paint comprises the following components in parts by mass:

cement 240-;

800 portions of sand and 850 portions of sand;

stone 1050-;

150 portions of water and 170 portions of water;

50-60 parts of fly ash;

5-8 parts of a water reducing agent;

3-8 parts of zinc chromate;

1-3 parts of starch.

2. The concrete with improved performance and reduced hydration heat blended with fly ash of claim 1, wherein: the paint also comprises the following components in parts by mass:

2-5 parts of potassium borate.

3. The concrete with improved performance and reduced hydration heat blended with fly ash of claim 1, wherein: the water reducing agent is prepared by uniformly mixing a polycarboxylic acid water reducing agent and lignosulfonate in a mass ratio of 3-7: 1.

4. The concrete with improved performance and reduced hydration heat blended with fly ash of claim 1, wherein: the water reducing agent is prepared by uniformly mixing a polycarboxylic acid water reducing agent and lignosulfonate in a mass ratio of 4: 1.

5. The concrete with improved performance and reduced hydration heat blended with fly ash as claimed in any one of claims 3-4, wherein: the lignosulfonate is any one of potassium lignosulfonate and calcium lignosulfonate.

6. The concrete with improved performance and reduced hydration heat blended with fly ash as claimed in any one of claims 1-4, wherein: the paint also comprises the following components in parts by mass:

3-6 parts of barium chromate.

7. The concrete with improved performance and reduced hydration heat blended with fly ash of claim 6, wherein: the paint also comprises the following components in parts by mass:

2-4 parts of calcium carbonate.

8. The concrete with improved performance and reduced hydration heat blended with fly ash as claimed in any one of claims 1-4, wherein: the paint also comprises the following components in parts by mass:

and 1-4 parts of triethanolamine.

9. A method of producing a concrete having improved properties and reduced heat of hydration incorporating fly ash as claimed in any one of claims 1 to 8, wherein: the method comprises the following steps:

step (1), mixing cement and water, and uniformly stirring to form slurry;