JP6590743B2 - Irwin hydraulic composition and method for producing the same - Google Patents

Description

  The present invention relates to an Irwin hydraulic composition and the like that has a long pot life and can easily extend the setting time by using a small amount of a setting retarder.

Conventionally, with including Irwin _{(3CaO · 3Al 2 O 3 ·} CaSO 4) as a main component, alite (3CaO · _SiO 2), belite (2CaO · _SiO 2), aluminate phase (3CaO · _Al 2 _{O 3} ), A ferrite phase (4CaO.Al ₂ O ₃ .Fe ₂ O ₃ ), and an anhydrous gypsum (CaSO ₄ ), the Erwin hydraulic composition is excellent in quick hardening and low alkalinity. Such Irwin hydraulic compositions take advantage of these characteristics, such as cement for GRC (glass fiber reinforced concrete), cement for radioactive waste solidification and embedding, solidified material for ground improvement of highly organic soil soft ground such as peat, etc. Is used.
Irwin-based clinker is attracting attention as an energy-saving cement clinker because it has a lower firing temperature and limestone basic unit than Portland cement clinker and consumes less energy for clinker production.

  However, since Irwin has a high hydration activity, there is a problem that it is difficult to ensure and adjust the pot life in mortar and concrete using an Irwin hydraulic composition. That is, in order to adjust the setting of concrete or the like, a setting retarder is usually used, but oxycarboxylic acid type setting retarders such as gluconic acid, citric acid and tartaric acid which are generally used in Portland cement-based hydraulic compositions. Polymeric organic acid-based retarders such as lignin sulfonic acid and humic acid, and inorganic retarders such as magnesium silicofluoride and boric acid have a sufficient retarding effect in Irwin hydraulic compositions. In addition, the strength development may be greatly reduced depending on the type of setting retarder. Among these, for example, citric acid may shorten the setting time depending on the amount of citric acid added.

  Various techniques have been developed to improve the adjustment of the setting of such an Irwin hydraulic composition. For example, Patent Literature 1 discloses a setting retarding method in which 0.1 to 5 parts by weight of aldonic acid and / or a salt thereof is added as a setting retarding agent to 100 parts by weight of an Irwin hydraulic composition. Patent Document 2 discloses a setting retarder comprising at least one first component selected from citric acid and a salt thereof and at least one second component selected from heptonic acid and a salt thereof. In addition, 0.01 to 3.0 parts by weight of the first component and 40 to 150 parts by weight of the second component are added to 100 parts by weight of the first component with respect to 100 parts by weight of the Irwin hydraulic composition. A set retarder is disclosed.

JP 09-255388 A JP 09-295842 A

However, all of the techniques described in the above-mentioned patent documents require a special material, which increases costs and makes it difficult to reduce the amount of setting retarder used. It is in the situation.
Accordingly, an object of the present invention is to provide an Irwin hydraulic composition capable of effectively extending the pot life while using an easily available material and reducing the amount of setting retarder used.

  Therefore, as a result of intensive studies, the present inventor has obtained an Irwin hydraulic composition capable of easily and effectively extending the pot life by using a hydraulic material containing a zinc-containing cement clinker powder containing a specific amount of zinc. The inventors have found that the present invention can be obtained and have completed the present invention.

That is, the present invention includes the following components (C), (S) and (W):
(C) A total of 80 to 150 parts by mass of zinc-containing Portland cement clinker powder and / or zinc-containing eco-cement clinker powder and 20 to 50 parts by mass of anhydrous gypsum powder with respect to 100 parts by mass of Irwin clinker powder, and A hydraulic material containing 0.3 to 1.5% by mass of zinc in terms of zinc oxide in the total amount of zinc-containing Portland cement clinker powder and zinc-containing ecocement clinker powder,
(S) Aggregate and (W) An Irwin hydraulic composition containing water is provided.
Moreover, this invention manufactures a zinc containing Portland cement clinker and / or a zinc containing eco-cement clinker using the 1 type, or 2 or more types of zinc source chosen from a general waste incineration ash, zinc slag, and a zinc plating waste liquid. The Irwin hydraulic composition comprising the step of producing a zinc-containing Portland cement clinker powder and / or a zinc-containing ecocement clinker powder contained in the component (C) by passing through a pulverization step after passing through the step (X) The manufacturing method of a thing is provided.

  The Irwin hydraulic composition of the present invention can effectively extend the pot life using readily available materials, so it is possible to ensure good workability and reduce the amount of setting retarder used. Can also be reduced.

It is a graph which shows the compressive strength of the mortar produced using the Irwin hydraulic composition obtained in the Example and the comparative example.

Hereinafter, the present invention will be described in detail.
The Irwin hydraulic composition of the present invention is
The following components (C), (S) and (W):
(C) A total of 80 to 150 parts by mass of zinc-containing Portland cement clinker powder and / or zinc-containing eco-cement clinker powder and 20 to 50 parts by mass of anhydrous gypsum powder with respect to 100 parts by mass of Irwin clinker powder, and A hydraulic material containing 0.3 to 1.5% by mass of zinc in terms of zinc oxide in the total amount of zinc-containing Portland cement clinker powder and zinc-containing ecocement clinker powder,
(S) Aggregate, and (W) Contains water.

  In the Irwin hydraulic composition of the present invention, as component (C), a total of 80 to 150 parts by mass of zinc-containing Portland cement clinker powder and / or zinc-containing ecocement clinker powder with respect to 100 parts by mass of Irwin clinker powder. In addition, water containing 20 to 50 parts by mass of anhydrous gypsum powder and containing 0.3 to 1.5% by mass of zinc in terms of zinc oxide in the total amount of zinc-containing Portland cement clinker powder and zinc-containing ecocement clinker powder Contains a hard material.

The Irwin clinker powder contained in the hydraulic material of component (C) is a clinker powder containing erwin (3CaO.3Al ₂ O ₃ .CaSO ₄ ) as a main component, and is obtained by pulverizing the Erwin clinker. It is. Such an Irwin clinker powder preferably further contains belite (2CaO · SiO ₂ ). Specifically, it is preferable to contain 40 to 90% by mass of Irwin, and more preferably 50 to 80% by mass. If the Erwin content is less than 40% by mass, the rapid hardening of the Irwin hydraulic composition may be reduced, and if it exceeds 90% by mass, the long-term strength development of the Irwin hydraulic composition is reduced. there's a possibility that. Moreover, it is preferable to contain 10-60 mass% of belite, and it is more preferable to contain 20-50 mass%. If the content of belite is less than 10% by mass, the long-term strength development of the Irwin hydraulic composition may be reduced, and if it exceeds 60% by mass, the rapid hardness of the Irwin hydraulic composition may be reduced. May be reduced.

Furthermore, the Irwin clinker powder has an aluminate phase (3CaO · Al ₂ O ₃ ) of more than 0% by mass to 7% by mass and a ferrite phase (4CaO · Al ₂ O ₃ · Fe ₂ O ₃ ) of more than 0% by mass 20 It is preferable to contain less than 5% by mass and anhydrous gypsum (CaSO ₄ ) more than 0% by mass and 5% by mass or less. By containing these components, the calcination property during the production of the Irwin clinker powder is further improved, the pot life of the Irwin hydraulic composition is shortened, and the strength development is not reduced. The energy consumed for the production of the system clinker can be reduced.

The hydraulic material of component (C) is a total of 80 to 150 parts by mass, preferably 90 to 140 parts by mass of zinc-containing Portland cement clinker powder and / or zinc-containing ecocement clinker powder with respect to 100 parts by mass of Irwin clinker powder. Parts, more preferably 100 to 130 parts by mass. If the total amount of these zinc-containing powders is less than 80 parts by mass, the long-term strength development of the Irwin hydraulic composition may be reduced, and if it exceeds 150 parts by mass, the early development of the strength of the Irwin hydraulic composition may occur. May decrease. Note that only one of the zinc-containing Portland cement clinker powder and the zinc-containing ecocement clinker powder may be used, or both of them may be used in combination, and the total amount of these may be the above amount.
These zinc-containing Portland cement clinker powder and / or zinc-containing ecocement clinker powder are powders obtained by pulverizing zinc-containing Portland cement clinker and / or zinc-containing ecocement clinker.

  Zinc-containing Portland cement clinker powder and zinc-containing eco-cement clinker powder are 0.3 to 1.5% by mass, preferably 0.5 to 1.5%, in terms of zinc oxide, in the total amount of these powders. It is contained by mass%, more preferably 0.6-1.3 mass%. If the zinc oxide content is less than 0.3% by mass, the effect of extending the pot life of the Irwin hydraulic composition may be reduced, and if the zinc oxide content exceeds 1.5% by mass The early strength development of the Irwin hydraulic composition may be reduced.

  In the present invention, both a zinc-containing Portland cement clinker powder and a zinc-containing ecocement clinker powder may be used. preferable. Examples of such zinc-containing Portland cement clinker powder include zinc-containing ordinary Portland cement clinker powder and zinc-containing early-strength Portland cement clinker powder.

  The hydraulic material of component (C) contains 20 to 50 parts by mass, preferably 25 to 45 parts by mass of anhydrous gypsum powder with respect to 100 parts by mass of Erwin clinker powder. If the content of the anhydrous gypsum powder is outside the above range, the long-term strength developability of the Irwin hydraulic composition may be reduced. Such anhydrous gypsum powder does not include anhydrous gypsum powder derived from anhydrous gypsum contained in Irwin clinker.

Anhydrous gypsum powder is obtained by grinding anhydrous gypsum, and examples of such anhydrous gypsum include soluble anhydrous gypsum (type III anhydrous gypsum) and insoluble anhydrous gypsum (type II anhydrous gypsum). From the viewpoint of safety, it is preferably insoluble anhydrous gypsum, and the Blaine specific surface area of the anhydrous gypsum powder is preferably 2500 to 12000 cm ² / g, more preferably 3500 to 8000 cm ² / g, and further preferably 3700. ˜5000 cm ² / g. Here, if all of the anhydrous gypsum powder is fine, cracking and warping due to expansion of the cured hydraulic composition is likely to occur. Therefore, it is preferable to make some anhydrous gypsum powder coarse. Specifically, for example, in 100% by mass of anhydrous gypsum powder, the content of fine particles having a Blaine specific surface area of 4500 to 12000 cm ² / g is 50 to 80% by mass, and the Blaine specific surface area is 2500 to 4000 cm ^2. It is preferable that the content of coarse particles that are / g is 20 to 50% by mass.

In the Erwin hydraulic composition of the present invention, the molar ratio (SO ₃ ) between the total amount of SO ₃ contained in both the Erwin clinker powder and the anhydrous gypsum powder and the amount of Al ₂ O ₃ contained in the erwin clinker powder. / Al ₂ O ₃ ) is preferably 1.0 to 1.5, more preferably 1.05 to 1.3, from the viewpoint of securing the pot life and strength development.

The brane specific surface area of the hydraulic material of component (C) is preferably 4000 to 5000 cm ² / g from the viewpoint of securing early and long-term strength development. The Blaine specific surface area of the Erwin clinker powder, zinc-containing Portland cement clinker powder, and zinc-containing ecocement clinker powder is also preferably within the above range.

  The Irwin hydraulic composition of the present invention contains an aggregate as the component (S). Examples of such aggregate include crushed stone, crushed sand, slag aggregate, artificial lightweight aggregate, recycled aggregate, gravel and sand described in JIS A 5308 “Ready Mixed Concrete” Appendix A. The content of the aggregate may vary depending on the use of the Irwin hydraulic composition, but from the viewpoint of workability and the like, it is usually 100 to 1500 parts by mass with respect to 100 parts by mass of the hydraulic material of the component (C). It is.

  The Irwin hydraulic composition of the present invention contains water as the component (W). Examples of the water include tap water, water other than tap water, and recovered water described in Appendix C of JIS A 5308 “Ready mixed concrete”. The water content may vary depending on the use of the Irwin hydraulic composition, but from the viewpoint of workability and the like, it is usually 20 to 100 parts by mass with respect to 100 parts by mass of the hydraulic material of component (C). is there.

  The Erwin hydraulic composition of the present invention is a citric acid, heptonic acid, succinic acid, tartaric acid, and salts thereof from the viewpoint of avoiding the deterioration of early strength development and the adjustment of pot life. You may contain the 1 type (s) or 2 or more types of setting retarder chosen. The content of the setting retarder is preferably 0.5 parts by mass or less, more preferably 0.01 to 0.45 parts by mass, with respect to 100 parts by mass of the hydraulic material of the component (C). Preferably it is 0.05 to 0.4 parts by mass, more preferably 0.1 to 0.35 parts by mass, or the Irwin hydraulic composition of the present invention may not contain the above setting retarder. .

  The average particle size of the setting retarder is preferably 0.1 to 1000 μm, more preferably 1 to 500 μm, and further preferably 3 to 300 μm, from the viewpoint of expression of the retarding effect of the setting retarder. .

  The Irwin hydraulic composition of the present invention may further contain one or more setting accelerators selected from lithium carbonate, calcium nitrite, and calcium lactate from the viewpoint of enhancing early strength development. The content of the setting accelerator is preferably 5 parts by mass or less, more preferably 0.1 to 4.5 parts by mass, and further preferably 100 parts by mass of the hydraulic material of component (C). It is 0.5-4 mass parts, More preferably, it is 1-3.5 mass parts, or the Erwin hydraulic composition of this invention does not need to contain the said setting accelerator.

  Further, when lithium carbonate and calcium nitrite are used in combination as a setting accelerator, the mixing ratio of lithium carbonate and calcium nitrite is preferably a mass ratio (lithium carbonate: calcium nitrite) from the viewpoint of strength development. It is 50: 50-15: 85, More preferably, it is 40: 60-20: 80. Further, when lithium carbonate and calcium lactate are used in combination as a setting accelerator, the mixing ratio of lithium carbonate and calcium lactate is a mass ratio (lithium carbonate: calcium lactate), preferably 50:50 to 15:85, More preferably, it is 40: 60-20: 80.

  The average particle diameter of the setting accelerator is preferably 0.1 to 1000 μm, more preferably 1 to 500 μm, and further preferably 3 to 300 μm, from the viewpoint of expression of the acceleration effect of the setting accelerator. .

  The Irwin hydraulic composition of the present invention is a chemical admixture described in JIS A 6204 “Chemical admixture for concrete” such as a water reducing agent, an antifoaming agent, a shrinkage reducing agent, etc. Can be contained.

  The method for producing an Irwin hydraulic composition according to the present invention includes a zinc-containing Portland cement clinker and / or a zinc-containing ecological material using at least one zinc source selected from general waste incineration ash, zinc slag, and galvanizing waste liquid. After passing through the process (X) which manufactures a cement clinker, it includes the process of manufacturing the zinc-containing Portland cement clinker powder and / or the zinc-containing eco-cement clinker powder contained in the component (C) by passing through a pulverization process. That is, the manufacturing method of the Irwin hydraulic composition of the present invention includes the following pulverization step after the step (X) of manufacturing the zinc-containing Portland cement clinker and / or the zinc-containing ecocement clinker shown below. Zinc containing the zinc-containing Portland cement clinker and / or the zinc-containing ecocement clinker in the component (C) may be performed through any one of the steps (a) to (d), It can be obtained as a containing Portland cement clinker powder and / or a zinc-containing ecocement clinker powder, and, as will be described later, anhydrous gypsum can also be obtained as anhydrous gypsum powder contained in the component (C).

  Process (X) manufactures a zinc containing Portland cement clinker and / or a zinc containing eco-cement clinker using the 1 type, or 2 or more types of zinc source chosen from waste incineration ash, zinc slag, and a zinc plating waste liquid. It is a process. These zinc sources are not particularly limited as long as they are contained in the raw material and / or fuel.

  Moreover, for the production of the zinc-containing Portland cement clinker and the zinc-containing eco-cement clinker, an ordinary cement clinker production facility such as a rotary kiln can be used, and the firing temperature (maximum temperature) is preferably 1350 to 1600. ° C. If the firing temperature is less than 1350 ° C., the degree of firing of the clinker may be insufficient, and if the firing temperature exceeds 1600 ° C., there is a risk of over firing, both of which are major qualities such as condensation and strength development. It can be a factor of deteriorating characteristics.

  And, using the zinc-containing Portland cement clinker and / or the zinc-containing eco-cement clinker obtained in the above step (X), any one of the pulverization step and the mixing step of the following step (a) to step (d) is performed. By passing, these zinc-containing Portland cement clinker and / or zinc-containing eco-cement clinker can be obtained as powders, respectively. The compounding amounts of Irwin clinker, zinc-containing Portland cement clinker and / or zinc-containing ecocement clinker, and anhydrous gypsum are respectively Irwin-based clinker powder, zinc-containing Portland cement clinker powder and / or zinc-containing Portland cement clinker powder and / or Or it is the same as the content of zinc-containing ecocement clinker powder and anhydrous gypsum powder.

In the step (a), an Irwin clinker, the zinc-containing Portland cement clinker and / or the zinc-containing ecocement clinker obtained in the above step (X), and anhydrous gypsum are mixed, and the powder has a Blaine specific surface area of 4000 to 5000 cm ² / It is the process of grind | pulverizing simultaneously until it becomes g.

In the step (b), an Irwin clinker, the zinc-containing Portland cement clinker and / or the zinc-containing ecocement clinker obtained in the step (X), and a part of anhydrous gypsum (50 to 80 mass of the total amount of anhydrous gypsum) Is obtained until the Blaine specific surface area is 4000 to 5000 cm ² / g to obtain a crushed clinker and anhydrous gypsum, and then the Blaine specific surface area is 2500 to 4000 cm ² / g. In which the anhydrous gypsum powder is mixed as the remainder of the anhydrous gypsum powder.

In the step (c), an erwin clinker and an amount of 50 to 80% by mass of the total amount of anhydrous gypsum are pulverized to a brain specific surface area of 4000 to 5000 cm ² / g to obtain a pulverized product of clinker and anhydrous gypsum, The zinc-containing Portland cement clinker and / or zinc-containing ecocement clinker obtained in the above step (X) and the remainder of anhydrous gypsum are pulverized to a Blaine specific surface area of 3000 to 4000 cm ² / g to pulverize the clinker and anhydrous gypsum. After obtaining the product, the two types of clinker and crushed anhydrous gypsum are mixed.

In the step (d), 50-80% by mass of the total amount of Irwin clinker and anhydrous gypsum is pulverized to a Blaine specific surface area of 4000-5000 cm ² / g to obtain a pulverized product of clinker and anhydrous gypsum. The zinc-containing Portland cement clinker or zinc-containing ecocement clinker obtained in the step (X) is pulverized to a Blaine specific surface area of 3000 to 4000 cm ² / g to obtain a clinker pulverized product, and further 20 to 50 of anhydrous gypsum powder. The mass% is pulverized to a Blaine specific surface area of 2500 to 4000 cm ² / g to obtain an anhydrous gypsum pulverized product, and then these three types of pulverized product are mixed.
In addition, the setting retarder and the setting accelerator may be added at the time of any of the above pulverization processes and pulverized at the same time if pulverization is required for finer particles, and if the particles are sufficiently fine particles In this case, a predetermined amount may be added to any one of the clinker pulverized products.
Among the steps including the pulverization steps (a) to (d), the step (a) is completed by only one pulverization process, and thus the Irwin hydraulic composition of the present invention can be easily produced. On the other hand, since the two types of anhydrous gypsum powders having different Blaine specific surface areas are obtained in the steps (b) to (d), the Irwin hydraulic composition of the present invention is particularly excellent in suppressing expansion of the cured hydraulic composition. Can be manufactured.

The obtained Erwin hydraulic composition of the present invention can ensure good workability by appropriately extending the pot life, and also exhibits excellent strength development with fast curing, It is extremely useful as concrete. For example, in the case of mortar having a water cement ratio of 45% using the Irwin hydraulic composition of the present invention, the pot life in the fresh state is preferably 30 minutes or more after mixing each component, more preferably Is 45 minutes or more, and after mixing each component, the compressive strength after the sealing curing for 1 day, when the water curing is 2 hours, is preferably 10 N / mm ² or more, more preferably 12.5 N / mm ² or more.

EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples.
In addition, the abbreviation symbol of the mineral composition in a table | surface shows the following chemical components.
C = CaO
S = SiO ₂
A = Al ₂ O ₃
F = Fe ₂ O ₃
S '= SO ₃

The mineral composition in the table was measured by the XRD Rietveld method described in the literature (Hoshino et al .; Cement and Concrete Papers, No. 59, pp. 14-21 (2005)). Analysis software was used.
X-ray diffractometer: D8 ADVANCE, manufactured by Bruker AXS Analysis software: DIFFRACplus TOPAS (Ver.3), manufactured by Bruker AXS

[Production Example 1: Production of zinc-containing Portland cement clinker]
Limestone, silica stone, construction generated soil, coal ash, slag and zinc oxide (special grade reagent, manufactured by Kanto Chemical Co., Ltd.) are mixed and consolidated so as to have chemical compositions shown in a-1 to a-4 of Table 1, A pellet was prepared. Next, the pellets were put into an ultrafast heating furnace and kept at 1000 ° C. for 30 minutes to perform dehydration and decarboxylation, and then the temperature was raised to 1500 ° C. at a heating rate of 1000 ° C./hour. Baked at 20 ° C. for 20 minutes. Then, it stood to cool outside a furnace and produced the ordinary Portland cement clinker which has the mineral composition shown to a-1 to a-4 of Table 2.
Further, as a clinker not containing zinc in the above-mentioned predetermined amount, limestone, quartzite, construction generated soil, coal ash, and slag are mixed and consolidated so as to have a chemical composition shown in a-5 of Table 1. In the same manner as in -1 to a-4, ordinary Portland cement clinker having the mineral composition shown in a-5 of Table 2 was produced.

[Production Example 2: Production of hydraulic material (C)]
Using each of the ordinary Portland cement clinkers a-1 to a-5 obtained in Production Example 1 and the Irwin clinker, anhydrous gypsum, and lithium carbonate shown in Table 3, the above step (b) is performed to obtain water. A hard composition (C) was produced. That is, according to the blending amount shown in the column of “pulverization” in Table 4, Erwin clinker, the above Portland cement clinker, anhydrous gypsum (74 mass% in the total amount of anhydrous gypsum), and lithium carbonate (reagent special grade manufactured by Kanto Chemical Co., Inc.) To obtain a pulverized product, and then according to the blending amount shown in the column of “Mixing” in Table 4, the anhydrous gypsum powder obtained by previously pulverizing the remaining anhydrous gypsum (26 mass% in the total amount of anhydrous gypsum) The resulting pulverized product was added and mixed to produce a hydraulic material (C). Table 5 shows the Portland cement clinker used for each hydraulic material (C). In addition, Table 5 shows the Blaine specific surface area of the obtained hydraulic material (C).

[Examples 1-5, Comparative Examples 1-5]
Mortar was prepared as an Irwin hydraulic composition in which the amount of setting retarder was varied in three patterns according to the amount shown in Table 6. The following materials were used as materials shown in Table 6.
・ Hydraulic material: Hydraulic material shown in Table 5 ・ Sand: Standard sand for cement strength test (sold by Cement Association)
・ Water: Sakura City, Chiba Pref. ・ Water reducing agent: Naphthalenesulfonic acid water reducing agent (Mighty 150, manufactured by Kao Corporation)
-Setting retarder: Citric acid (Kanto Chemical Co., Ltd., reagent grade 1)

<< Evaluation test 1: Measurement of pot life >>
The pot life was evaluated with a mortar zero stroke flow. Specifically, using the flow table described in JIS R 5201 “Physical test of cement”, a flow rate after pulling out the mortar into a φ51 × 26 mm plastic cylindrical tube until it was frayed (0 stroke) Was measured. In addition, the mortar which shows the flow value of 100 mm or more by this measurement was determined as a mortar in a usable state.
Table 7 shows the measurement results.

  As shown in Table 7, the pot life of Examples 1, 3 and 5 is comparable to the pot life of Comparative Example 3 corresponding to the conventional Irwin hydraulic composition. Here, when the amount of the setting retarder is compared, in Examples 1 and 3, half of the amount in Comparative Example 3 is sufficient, and it should be noted that the example in which the setting retarder was not used. The pot life of 5 is the same as the pot life of Comparative Example 3 using a setting retarder. Thus, it can be seen that the Irwin hydraulic composition of the present invention can secure a sufficient pot life even if the amount of setting retarder used is reduced or not used.

<< Evaluation Test 2: Measurement of Compressive Strength >>
The compressive strength was measured using the mortars of Examples 1 to 5 and Comparative Examples 1 to 5. Specifically, a 20 × 20 × 30 mm formwork placed on a table vibrator described in JIS R 5201 “Cement physical test” is packed with one layer of mortar, and after 30 seconds of vibration, the surface is smoothened. After finishing, after sealing and curing until the age of 1 day, the mortar is demolded, then the mortar is cured in water, and the age from the start of the underwater curing is 2 hours, 3 hours, 1 day, and 7 days The compressive strength of the mortar at the time was measured.
The measurement results are shown in Table 8 and FIG.

  As shown in Table 8 and FIG. 1, the compressive strengths of Examples 1, 3 and 5 are as excellent as the compressive strength of Comparative Example 3 at each age. Therefore, it can be seen that the Irwin hydraulic composition of the present invention can secure a sufficient pot life even without using a large amount of a setting retarder and is excellent in strength development.

Claims (6)

The following components (C), (S) and (W):
(C) A total of 80 to 150 parts by mass of zinc-containing Portland cement clinker powder and / or zinc-containing eco-cement clinker powder and 20 to 50 parts by mass of anhydrous gypsum powder with respect to 100 parts by mass of Irwin clinker powder, and A hydraulic material containing 0.3 to 1.5% by mass of zinc in terms of zinc oxide in the total amount of zinc-containing Portland cement clinker powder and zinc-containing ecocement clinker powder,
(S) Aggregate and (W) Irwin hydraulic composition containing water. Irwin based clinker powder, Erwin _{(3CaO · 3Al 2 O 3 ·} CaSO 4) 40~90 wt%, and belite (2CaO _· SiO 2) containing 10 to 60 wt%, Erwin based water according to claim 1 Hard composition.   The Irwin hydraulic composition according to claim 1 or 2, wherein the zinc-containing Portland cement clinker powder is one or more powders selected from early strong Portland cement clinker powder and ordinary Portland cement clinker powder.   Whether the total of 0.5 or less parts by mass of one or more setting retarders selected from citric acid, heptonic acid, succinic acid, tartaric acid, and salts thereof per 100 parts by mass of component (C) Or an Irwin system according to any one of claims 1 to 3, which does not contain one or more setting retarders selected from citric acid, heptonic acid, succinic acid, tartaric acid, and salts thereof. Hydraulic composition.   Including 100 parts by mass of component (C), 5 parts by mass or less of one or more setting accelerators selected from lithium carbonate, calcium nitrite, and calcium lactate, or lithium carbonate, calcium nitrite, and The Irwin hydraulic composition according to any one of claims 1 to 4, which does not contain one or more setting accelerators selected from calcium lactate.   Through the step (X) of producing a zinc-containing Portland cement clinker and / or a zinc-containing eco-cement clinker using one or more zinc sources selected from general waste incineration ash, zinc slag, and zinc plating waste liquid 6. The method according to claim 1, further comprising a step of producing a zinc-containing Portland cement clinker powder and / or a zinc-containing ecocement clinker powder contained in the component (C) by passing through a pulverization step. A process for producing an Irwin hydraulic composition.