KR100609723B1 - The fluosilicate salt composition of reducing agent of hydration heat for improvement of and watertightness control of crack of concreteself-exothermic and hydrauric inorganic compound and the method of making it - Google Patents

Abstract

The present invention is 3 to 20% by weight silicic acid salt; 5-15% by weight of colloidal silica; 47 to 89% by weight of water; 0.5 to 5.0% by weight of hydration heat regulator; 1 to 3.0% by weight of a polymer condensate; And 1.5 to 10% by weight of an inorganic polymer water repellent, and a fluorinated salt-based hydration heat reducing agent composition for water-concrete mixing, and a method of manufacturing the same. The addition of silicate hydride heat reduction agent composition for water-tight concrete mixing according to the present invention can suppress the fluidity deterioration phenomenon of concrete, and hardening characteristics such as improvement of compressive strength and reduction of length change and dry shrinkage rate during concrete hardening It can be improved, and the effect of improving the crack control, watertightness and durability of concrete by suppressing the heat of hydration during hydration can be obtained.

Concrete, watertightness, cracks, silicate salt, heat of hydration, silicate fluoride, zinc, magnesium, colloidal silica, water, hydration heat regulator, polymer condensate, inorganic polymer water repellent

Description

Fluoride-based hydration heat reducing agent composition for improving water-tightness and crack control of concrete (self-heating hydraulic inorganic compound) and manufacturing method thereof SELF-EXOTHERMIC AND HYDRAURIC INORGANIC COMPOUND) AND THE METHOD OF MAKING IT}

1 is a process chart showing a manufacturing process of a hydration heat reducing agent composition according to the present invention,

2 is a graph showing the initial fluidity and aging change of concrete according to the amount of hydration heat reducing agent composition according to the present invention;

3 is a graph of concrete compressive strength for each age according to the addition amount of the heat of hydration reducing agent composition according to the present invention,

4 is a graph showing the change in the length of concrete during curing according to the amount of the heat reduction agent composition of the present invention;

5 is a graph of measurement of hydration temperature at the time of concrete hydration of Example 2 and Comparative Example;

6 is a graph of shrinkage length measurement in concrete drying of Example 2 and Comparative Example;

7 is a graph of concrete constraint stress measurement in Example 2 and Comparative Example,

8 is a specimen photograph taken plate-like crack pattern of Example 2,

9 is a graph showing the change in concrete permeability (g) according to the amount of the hydration heat reducing agent composition according to the present invention;

10 is a graph of concrete porosity analysis according to the addition amount of the heat of hydration reducing agent composition according to the present invention,

11 is a graph of concrete freeze thaw test results according to the addition amount of the heat of hydration reducing agent composition according to the present invention.

The present invention relates to a fluorinated hydrofluoric acid-based heat reducing agent composition for improving the watertightness and crack control of concrete, and a method of manufacturing the same, and more specifically, to a raw material composition of silica fluoride, zinc-based metal salts, and magnesium-based metal salts having a predetermined concentration. It relates to a hydrofluoric acid-based hydration heat reducing agent composition for improving the water-tightness of concrete and crack control by mixing a predetermined amount of water, water, hydration heat regulator, polymer condensate, inorganic polymer water repellent.

In general, silica fluoride salts such as zinc fluoride and magnesium fluoride are dissociated into metal ions such as zinc and magnesium and fluoride ions (SiF ₆ ^2- ) by hydrolysis in an aqueous solution state, and alkalinity of the aqueous solution The higher the dissociation characteristic is increased. The dissociated silicides in the aqueous solution are hydrolyzed again to form amorphous silica and fluorine ions (F ⁻ ). Amorphous silica has the effect of promoting the pozzolanic reaction of soil and cement containing a large amount of Ca (OH) ₂ , and when the alkalinity of the aqueous solution is increased, the fluorine ions dissociated from silicic ions and alkali metals such as Ca, Al, The reaction forms metal fluorides such as CaF ₂ , NaF, AlF ₃ and the like. Because of the above properties, silica fluoride salts may use magnesium fluoride as an additive to control the setting or curing rate of various hydraulic materials including soil and cement.

The `` Delayed Hydration Effect of Portland Cement on Magnesium Fluoride '' published in the Journal of the Korean Ceramic Society (Vol. 34, No. 2) presented the results of research using magnesium silicate to delay the setting time of cement mortar. .

In addition, as a Japanese Patent Registration No. 02-184584, a surface hardening agent for concrete for the purpose of improving surface hardness and roughness by forming a dense hardened layer by applying or spraying a fluorinated silica prepared by reacting silicic acid or hydrofluoric acid with a metal salt to a concrete surface. There is also an example.

On the other hand, Korean Patent Registration No. 0233778 describes one or more of the silicides consisting of magnesium fluoride, sodium fluoride, zinc fluoride, manganese fluoride, and calcium fluoride in a mixed powder of type II anhydrous gypsum, coal ash and blast furnace slag. 5 to 25% by weight of it was used as a high strength powder admixture for concrete.

In addition, the application of silica fluoride in order to impart waterproofing to cement or concrete. In Korea Patent Application No. 2001-63881 (method of improving the waterproofness of concrete or ready-mixed concrete using zinc fluoride aqueous solution) zinc fluoride in the silica fluoride By applying the aqueous solution alone, the waterproof effect was excellent, but the compressive strength enhancement effect of the concrete is weak, and in particular, the fluidity has a problem that the remarkably lowered.

In addition, the same applicant also discloses a technique for the silica fluoride additive in the Republic of Korea Patent Application No. 2002-42799 (Registration No. 10-0417528) and No. 2003-76689. These patent applications aim to increase the watertightness to improve the waterproof function of the concrete and to reduce the cracking to increase the strength. In Korean Patent No. 10-0417528, the application of a zinc fluoride solution alone in a silica fluoride improves the waterproof effect, improves the compressive strength of concrete, and improves the problem of deterioration in fluidity. In addition, Korean Patent Application No. 2003-76689 further improves the watertightness and crack reduction effect, including only silica fluoride consisting of magnesium fluoride and zinc fluoride, reticulated silica, and water.

However, considering that the construction of civil engineering, construction, etc. using the concrete containing additives consumes a lot of volume and the building once used for several decades, the above-described siliceous additives of the prior art including the applicant's prior application include In addition to improving the watertightness, there is a need for a more excellent reduction effect on cracks generated by various factors such as temperature, stress, and shrinkage factors after curing, and thus a level capable of improving durability.

In addition, in the concrete additives of the prior art, there is a demand for a complex functional chemical additive for improving the properties of concrete to enhance durability by suppressing reinforcing corrosion and improving freeze-thawing resistance as well as enhancing watertightness and strength.

Therefore, the present invention solves the above problems and gives water-tightness to concrete in order to improve the durability of concrete, water-tightness of concrete that improves durability by increasing the strength by reducing cracks by reducing dry shrinkage and hydration heat, and resistance to freezing and thawing. An object of the present invention is to provide a silicic acid-based hydration heat reducing agent composition for improvement and crack suppression.

In order to achieve the above object of the present invention, using a predetermined concentration of silicate fluoride, zinc-based metal salts and magnesium-based metal salts to produce a hydration heat reducing agent raw material composition of the silica fluoride salt and colloidal silica hydration heat regulators, polymer condensates, inorganic polymer water repellent Mixing each of a predetermined amount may provide a silicic acid-based hydration heat reducing agent composition for improving the watertightness of the concrete and suppressing cracking.

Other objects, obvious advantages, and distinctive features different from the prior art will become more apparent from the following detailed description and the preferred embodiments according to the accompanying drawings.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The process drawing which showed the manufacturing process of the hydration heat reducing agent composition by this invention. 2 to 12 are graphs showing the results of experiments on the performance of the hydration heat reducing agent composition according to the present invention. This will be described in detail in the relevant section.

As shown in Figure 1, the hydration heat reducing agent composition according to the present invention is made by using a fluoride silicic acid and a metal salt as a raw material for hydration heat reducing agent and the hydration heat reducing agent composition according to the present invention is a silicate salt, colloidal silica, water, hydration heat regulator It comprises a polymer condensate, inorganic polymer water repellent. Hereinafter, the present invention will be described based on the manufacturing process of the hydration heat reducing agent composition according to the present invention based on FIG. 1.

First, dilute silicic acid having a concentration of 20-40% corresponding to 10-50% by weight with water of 44-88.95% by weight so as to have a concentration of 13 ± 2%. This process hydrolyzes fluorosilicate to produce fluorine ions (F ⁻ ) and soluble silica (SiO ₂ ), which are then transferred to a stable state (S100).

 Next, a metal salt is added to a state in which the generated fluorine ion and soluble silica are mixed to generate a siliceous salt and a colloidal silica (S200). The metal salts are zinc metal salts and magnesium metal salts. The zinc-based metal salt includes at least one of zinc oxide, zinc hydroxide, zinc carbonate, zinc sulfate, and zinc chloride. The magnesium metal salt includes at least any one of magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium sulfate, and magnesium chloride.

Zinc-based metal salts have a concentration of 98% or more, and 1.0% to 7.0% by weight is preferably added. It is difficult to achieve the desired effect at 1.0% by weight or less. Because it is difficult to do. Magnesium metal salt has a concentration of 98% or more, it is preferable to add 0.05% to 0.5% by weight, but less than 0.05% by weight is difficult to achieve the desired effect, and more than 0.5% by weight will cause excessive coagulation delay of concrete to decrease the physical properties Because it can.

The reaction formula for the formation of silicides is shown below.

H ₂ SiF ₆ + Metal Salt + ₂ H ₂ O → Fluosilicate salt (MSiF ₆ , M: Mg, Zn) + SiO ₂

In the fluorinated salt-based hydration heat reducing agent composition for improving the watertightness and crack suppression of the concrete thus made, the content of the silica fluoride is 3% by weight to 20% by weight and the content of the colloidal silica is preferably 5% by weight to 15% by weight. When the content of silicic acid salt is less than 3% by weight, the watertightness and strength enhancing effect is insignificant. Therefore, an excessive amount of additive is added. When the content is more than 20% by weight, the concentration of the liquid additive is so strong that it inhibits cement hydration reaction and neutralizes concrete. May result.

Next, the polymer condensate is added to the silicic acid salt and the colloidal silica mixture produced in S200 (S300). The polymer condensate is an aromatic high molecular organic compound having a concentration of 99% or more. The content of the polymer is preferably 1% to 3.0% by weight. At 1.0% by weight or less, it is difficult to exert an effect of stabilizing silicic chloride and colloidal silica and 3.0% by weight. This is because at above%, it may adversely affect the stability of silicate and colloidal silica.

And the hydration heat regulator is added to the mixture produced in S300 (S400). As the heat hydrating agent, Zn (NO ₃ ) ₂ .6H ₂ O is used as the latent heat agent (PCM) having a concentration of 98% or more, and the input content is preferably 0.5% by weight to 5.0% by weight. In the present invention, the hydration heat regulator reduces the heat of hydration of the concrete together with the silica fluoride salt, and serves to suppress the occurrence of cracking due to these factors by reducing the dry shrinkage rate.

Next, the inorganic polymer water repellent is added to the mixture produced in S400 to complete the hydration heat reducing agent composition (S500). As the inorganic polymer water repellent, a silane or siloxane polymer compound is used, and the concentration is 99% or more, and the input content is preferably 1% by weight to 10% by weight. At 1% by weight or less, it is difficult to exert an effect of improving water tightness and reducing water absorption. This is because at 10% by weight or more, the strength may be affected.

It looks at the reaction scheme in which the silicide fluoride salt according to the present invention is dissociated into silicide ions (SiF ₆ ^2- ). [Reaction Scheme 2] shows a reaction formula for dissociating magnesium silicate, and [Reaction Scheme 3] shows a reaction scheme for dissociating zinc silicate.

^{_{MgSiF 6 (aq) → Mg 2+}} (aq) + SiF 6 - (aq)

^{_{ZnSiF 6 (aq) → Zn 2+}} (aq) + SiF 6 - (aq)

As the fluorinated salt dissolves, gelation proceeds with an increase in pH value, and fluorine ions are released as the colloidal silica transitions to the reticulated colloidal silica. Reticulated colloidal silica is present in the diffused state in solution.

The released fluorine ions react with alkali ions in the cement to form sub-micro soluble metal fluorides of submicron size, forming a dense structure as a filling action for micropores and cracks of several micrometers to several tens of micrometers present in concrete. To increase the water tightness of the concrete. In addition, colloidal silica increases strength through the pozzolanic effect of reacting with calcium hydroxide produced by the hydration of cement to promote the production of calcium silicate hydrogel (C-S-H gel), which governs the ultimate strength of cement.

Hereinafter will be described in more detail by the following examples according to the present invention. In this embodiment, the zinc fluoride salt and magnesium silica fluoride prepared by adding zinc oxide and magnesium oxide into a silicic acid having a concentration of 25%, respectively, 90% by weight and 10% by weight, respectively, 7% by weight of a silica fluoride and a polymer condensate 1.0 The amount of the fluorinated hydrofluoric acid-based hydrating heat reducing agent composition (hereinafter referred to as SWP-HR) containing weight%, 1.0 weight% of hydration heat regulator, and 3.0% of inorganic polymer water repellent was changed to prepare test specimens for testing. However, the following examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

Example 1

Concrete mixing according to the embodiment is the SWP-HR is added to the cement 21.96kg / m ³ by 0.5% by weight (addition amount: 0.110kg / m ³ ), the sand (grain aggregate) and crushed stone (coarse aggregate) 50.13kg / m ³ and 54.53kg / m ³ , and then the mixed water was blended at 10.98kg / m ³ (water cement ratio, W / C = 0.5). For cement, S type 1 ordinary portland cement (specific gravity: 3.14, Blaine: 3350 kg / m ³ / g), sand less than 5 mm, and crushed stone less than 25 mm were used. After mixing, the concrete bibimbing method was a dry panning of cement and fine aggregates for 30 seconds using a forced pan-type mixer. Then, water was added and rubbed again for 60 seconds. Finally, the high fluidizing agent (SP) and SWP-HR were added, and the material was bibeamed for 60 seconds, and the material was then beamed for a total of 3 minutes 30 seconds.

Example 2

In Example 1, except that 1.0% by weight (SWP-HR addition amount: 0.219kg / m ³ ) of SWP-HR to the cement weight, respectively, in the same method and conditions as in Example 1 Was divided into Example 2.

Example 3

In Example 1, except that 1.5% by weight (SWP-HR addition amount: 0.320kg / m ³ ) of the SWP-HR to the cement weight, respectively, in the same method and conditions as in Example 1 Was divided into Example 3.

Example 4

In Example 1, except that 2.0% by weight (SWP-HR added amount: 0.439kg / m ³ ) of the SWP-HR to the cement weight, respectively, in the same method and conditions as in Example 1 Was divided into Example 4.

Comparative example

Concrete mixture without adding SWP-HR was mixed in the same conditions and in the same method as in Example 1 to make a comparative example, which was distinguished from the examples.

Test Example 1 Measurement of Fluidity

According to the present invention, the change in initial fluidity according to changes of Examples 1 to 4 and Comparative Examples of the present invention over time was measured by KS F 2402 [Test method of concrete slump], and the results are shown in the following [Table 1]. Schematically shown in FIG.

 Initial fluidity change according to changes of time of Examples 1 to 4 and Comparative Example of the present invention Elapsed time (minutes) Comparative Example (cm) Example 1 (cm) Example 2 (cm) Example 3 (cm) Example 4 (cm) 0 14.5 15 15.5 16 15 30 11 12 13 14.5 14 60 8 10 12 13 13.2 90 5.5 8 10.3 11.2 11.5 120 4 6 7.2 8.1 8.9

According to the initial fluidity results according to the time-dependent change of FIG. 2 and [Table 1] according to the present invention, the case of adding the composition SWP-HR according to the present invention is more effective in suppressing the fluidity drop than the case of the comparative example without the addition of SWP-HR. It can be seen that.

Test Example 2 Measurement of Compressive Strength

The compressive strength (MPa) of the concrete specimens of Examples 1 to 4 and Comparative Examples after 3, 7, 28, and 56 days of curing age, respectively, was measured according to KS F 2405. UTM), and the results are shown in the following [Table 2] and shown in FIG.

 Compressive strength change according to age of concrete according to Examples 1 to 4 and Comparative Examples of the present invention division Compressive strength by age (MPa) 3 days 7 days 28 days 56 days Comparative example 10.8 20.6 25.4 34.1 Example 1 10.6 21.9 26.6 35.3 Example 2 10.3 22.7 27.2 35.7 Example 3 10.3 22.8 27.3 35.8 Example 4 10.3 23.9 27.4 36.3

As shown in Table 2 and Figure 3 it can be seen that in the case of adding the SWP-HR embodiment is more effective in improving the compressive strength than the case of the comparative example without the addition of SWP-HR.

Test Example 3 Measurement of Length Change

The change in the length of the concrete test specimens of Examples 1 to 4 and the comparative example was measured for 180 days according to KS F 2424 [Testing method for the change of mortar and concrete] according to the change over time during the hardening of the concrete. 4 is shown in FIG.

Length change according to time-dependent change in concrete hardening of Examples 1 to 4 and Comparative Examples of the present invention Elapsed time (days) Comparative Example (X 10 ^-4 m) Example 1 (X 10 ^-4 m) Example 2 (X 10 ^-4 m) Example 3 (X 10 ^-4 m) Example 4 (X 10 ^-4 m) One 0.15 0.23 0.2 0.27 0.29 2 0.23 0.37 0.32 0.42 0.46 7 1.91 0.98 2.09 2.26 0.7 8 0.2 0.87 1.87 2.02 0.63 10 -0.55 0.53 1.52 1.67 0.28 14 -1.87 -0.97 -1.78 -1.57 -0.46 28 -3.2 -2.29 -2.03 -1.62 -0.64 35 -4.48 -3.22 -2.85 -2.2 -0.9 63 -5.89 -4.23 -3.75 -2.9 -1.19 90 -6.14 -4.41 -3.91 -3.02 -1.24 180 -6.35 -4.45 -4.03 -3.24 -1.28

As shown in Table 2 and FIG. 3, in the case of adding the SWP-HR, the length change according to the time-dependent change in the curing is smaller than that of the comparative example in which the SWP-HR is not added. It shows excellent resistance to.

Test Example 4 Measurement of Concrete Hydration Temperature

When the silica fluoride-based hydration heat reducing agent composition (SWP-HR) proposed in the present invention is added to cement, it is effective in suppressing hydration heat of cement. In order to confirm this, the hydration temperature at the time of hydration of cement of Example 2 and Comparative Example was measured and the result is shown in FIG.

As shown in Figure 5 it can be seen that the hydration temperature of Example 2 according to the hydration time is lower than the hydration temperature of the comparative example. Therefore, it can be seen that SWP-HR is effective in suppressing the heat of hydration when hydrating concrete.

Test Example 5: Dry Shrinkage Test

The addition of the silica fluoride-based hydration heat reducing agent composition (SWP-HR) proposed in the present invention is effective in controlling the cracking of concrete due to dry shrinkage during curing. In order to confirm this, the dry shrinkage rate during curing of Example 2 and Comparative Example was measured according to age after the displacement gauge was attached to a 100X100X400mm molding mold, and the results are shown in FIG. 6.

As shown in Figure 6 it can be seen that the shrinkage of Example 2 according to the drying time is smaller than the shrinkage of the comparative example. Therefore, it can be seen that SWP-HR is effective in suppressing cracking caused by dry shrinkage during curing of concrete.

Test Example 6 Constraint Stress Test

Adding the fluorinated hydrofluoric acid-based hydrating heat reducing agent composition (SWP-HR) proposed in the present invention is effective in controlling the cracking of concrete even in the state of restraint stress. In order to confirm this, the restraint stress of Example 2 and Comparative Example was measured according to age after the displacement gauge was attached to the 170X100X940mm dumbbell-shaped mold, and the results are shown schematically in FIG. 7.

As shown in FIG. 7, in the case of Example 2, no crack was generated even in 37 days or more, whereas in the comparative example, it was found that cracking occurred after 37 days. These results indicate that SWP-HR is effective in suppressing the cracking of concrete.

Test Example 7 Crack Pattern Confirmation Test

Adding the fluorinated hydrofluoric acid-based heat reduction agent composition (SWP-HR) proposed in the present invention is effective in controlling cracks generated in plate-shaped concrete having a small member size, such as slab. In order to confirm this, crack patterns of Example 2 and Comparative Example were observed for 60 days in a dry state at 60 ^° C. using a plate mold of 600 × 600 × 30 mm, and a test photograph was schematically illustrated in FIG. 8.

As shown in FIG. 8, in Example 2, cracking patterns of concrete were observed in a relatively small region. In Example 2, the crack generation inhibition rate was increased by about 82% based on the crack area.

Test Example 8 Measurement of Permeability

The concrete permeation amount (g) according to the time-dependent change of Examples 1 to 4 and Comparative Examples was measured in a state in which a permeation pressure of 5 kg _f / cm ² was applied to the test apparatus according to KS F 2451 [Test method for building cement waterproofing material] Is shown in the following [Table 4] and plotted in FIG.

Change of concrete permeation amount (g) according to change with time of Examples 1 to 4 and Comparative Example Elapsed time (hours) Comparative Example (g) Example 1 (g) Example 2 (g) Example 3 (g) Example 4 (g) 0 0 0 0 0 0 100 0.99 0.92 1.04 0.99 0.92 200 3.34 3.34 2.43 1.58 1.51 300 6.77 6.77 4.18 1.71 1.6 400 9.76 9.76 5.72 1.84 1.68 500 13.8 10.68 6.35 2.02 1.83 600 15.1 11.08 6.56 2.23 2.05 700 15.6 11.35 6.71 2.23 2.05 800 16 11.35 6.71 2.25 2.05 900 16 11.35 6.71 2.25 2.05 1000 16 11.35 6.71 2.25 2.05

As shown in [Table 4] and FIG. 9, it can be seen that in the case of adding the SWP-HR, the amount of permeation is significantly reduced compared to the comparative example in which the SWP-HR is not added. This indicates that SWP-HR, a composition according to the present invention, is effective for improving the watertightness of concrete.

Test Example 9 Analysis of Concrete Porosity

The porosity of each concrete according to Examples 1 to 4 and Comparative Examples was analyzed by mercury intrusion porosimetry under a vacuum pressure of 50 μm Hg, a vacuum time of 5 minutes, and a mercury injection pressure of 0.49 psia. 5] and shown in FIG. Analysis of the porosity may support whether the composition of the present invention is effective in improving watertightness.

 Concrete Porosity Analysis Results of Examples 1 to 4 and Comparative Examples division Porosity (%) Comparative example 51.05 Example 1 45.78 Example 2 43.56 Example 3 42.73 Example 4 41.96

Table 5 and FIG. 10 show that the porosity is lower in the case of adding the SWP-HR than in the comparative example without the SWP-HR. This indicates that the tissue of the example is more dense, thereby improving water tightness.

Test Example 10: Freeze-thawing Test

In order to confirm the durability improvement effect according to Examples 1 to 4 and Comparative Examples, the freeze-thawing test was performed until the dynamic elasticity index became 60% or less according to KS F 2437. The results are shown in [Table 6]. Scheme 11 is shown.

Freeze thawing test results of Examples 1 to 4 and Comparative Examples Freeze thaw cycles Comparative example Example 1 Example 2 Example 3 Example 4 Relative dynamic modulus (%) 0 100 100 100 100 100 10 99 99 100 100 100 20 98 97 98 100 99 30 98 96 96 97 97 40 94 96 96 97 97 50 93 95 93 96 95 60 92 94 93 96 95 70 90 94 91 95 95 80 88 92 91 94 95 90 85 91 89 94 93 100 83 88 89 94 93 120 80 86 88 93 93 140 76 86 88 93 92 160 70 84 86 93 90 180 65 80 82 93 88 200 60 76 78 90 83 250 51 70 72 87 77 300 64 65 80 70 350 54 57 74 64 400 67 54 450 55

According to Table 6 and FIG. 11, in the comparative example without the addition of SWP-HR, the free-thawing 200 or more cycles were less than 60% in the elasticity of the elastic elastomer, whereas in the case in which the SWP-HR was added, the cycle was at least 300 cycles. From as many as 400 cycles the relative dynamic modulus is less than 60%. This indicates that the resistance to repetitive cycles by freezing and thawing in the case of the examples compared to the comparative example was improved by at least 30% to 100% freezing and thawing.

3 to 20% by weight of the silica fluoride salt according to the present invention as described above; 5-15% by weight of colloidal silica; 47 to 89% by weight of water; 0.5 to 5.0% by weight of hydration heat regulator; 1 to 3.0% by weight of a polymer condensate; And 1.5 to 10% by weight of an inorganic polymer water repellent, comprising adding a hydrofluoric-based hydrofluoric acid-based hydrating heat reducing agent composition to the concrete to suppress the fluidity deterioration phenomenon of the concrete, the compressive strength of the concrete Hardening characteristics such as improvement and reduction of length change can be improved, and the effect of improving the crack control, water tightness and durability of concrete can be obtained by suppressing the heat of hydration during hydration.

Although the invention has been described with reference to the preferred embodiments mentioned above, many other possible modifications and variations can be made without departing from the spirit and scope of the invention. Accordingly, the appended claims are intended to cover such modifications and variations as fall within the true scope of the invention.

Claims (6)

3-20% by weight of silicides; 5-15% by weight of colloidal silica; 47 to 89% by weight of water; 0.5 to 5.0% by weight of hydration heat regulator; 1 to 3.0% by weight of a polymer condensate; And 1.5 to 10% by weight of an inorganic polymer water repellent agent. The method of claim 1, The silica fluoride salt is a concentration of 13 ± 2% by adding 44 to 88.95% by weight of 10 to 50% by weight of 20 to 40% by weight of silicic acid fluoride and then 1.0 to 7.0% by weight of zinc-based metal salt with a concentration of 98% or more A hydrofluoric salt-based hydration heat reducing agent composition for water-tight concrete mixing, which is formed by adding 0.05 to 0.5% by weight of magnesium metal salt of 98% or more. The method of claim 2, The zinc-based metal salt includes at least one of the group consisting of zinc oxide, zinc hydroxide, zinc carbonate, zinc sulfate, zinc chloride, The magnesium-based metal salt is fluorinated salt-based hydration heat reducing agent composition for water-tight concrete mixing, characterized in that it comprises at least one of the group consisting of magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium sulfate, magnesium chloride. The method of claim 1, wherein the heat of hydration regulator is a latent heat dissipating agent composition for water-tight concrete mixing, characterized in that Zn (NO ₃ ) ₂ · 6H ₂ O as a latent heat agent (PCM) of 98% or more concentration. The method of claim 1, The polymer condensate is characterized in that the concentration is more than 99% aromatic polymer organic compound, The inorganic polymer water repellent agent is a silane- or siloxane-based hydration heat reducing agent composition for water-tight concrete mixing, characterized in that the concentration is 99% or more of the silane or siloxane polymer compound. Diluting silicic acid fluoride having a concentration corresponding to 10-50% by weight with 44-80.45% by weight of water so as to have a concentration of 13 ± 2% (S100); Adding a zinc-based metal salt having a concentration of 98% or more of 7.0 to 10.0% by weight and a magnesium-based metal salt having a concentration of 98% or more of 0.05 to 0.5% by weight to generate a silicic fluoride salt and a colloidal silica mixture (S200); Injecting 1.0 to 3.0% by weight of the polymer condensate (S300); Injecting 0.5 ~ 5.0% by weight of a hydration heat regulator (S400); And 1 to 10% by weight of an inorganic polymer water repellent is prepared by the step of completing the hydration heat reducing agent composition (S500) characterized in that it comprises a method of producing a hydrofluoric acid-based fluorinated salt-based hydration heat reducing agent composition for mixing water.

Images