Mortar material

Abstract

To provide a mortar material having good fluidity and excellent filling properties.SOLUTION: In the mortar material, the mortar has a vibration viscosity, measured by a vibration viscometer immediately after kneading at a standard water ratio, of 50-600 (mPa s g / cm3). The fine aggregate contained preferably has a fineness modulus of 1.2 or more and 2.2 or less, and the mass ratio of the fine aggregate to the total mass of cement and expansive material is preferably 60-230%.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a mortar material. [Background technology]

[0002] Concrete used in the construction of architectural or civil engineering structures contains cement, water, aggregate, etc., and has the property of hardening through the hydration reaction of cement. After hardening, concrete may crack due to volume changes caused by stress, temperature changes, drying, etc. Cracks in concrete can cause water leakage, rebar corrosion, etc., and are a major factor in significantly reducing durability, so if the cracks are severe, they must be repaired. For example, cracks that occur in concrete structures such as tunnels and bridges are repaired by injecting mortar or repairing the cross-section.

[0003] For example, Patent Document 1 listed below describes such a mortar, which uses a thickener with a specific viscosity and has an adjusted content of a shrinkage-reducing agent and a pozzolanic substance, and which has excellent resistance to material separation, fluidity, and usable life. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-130570 Summary of the Invention [Problem to be solved by the invention]

[0005] When repairing concrete structures, it is desirable to control the fluidity of the mortar within a desired range to prevent dripping when injecting mortar into cracks or applying mortar to a wall surface. Patent Document 1 describes the use of a thickener with a predetermined viscosity range, but does not describe the viscosity of the mortar itself. Furthermore, the viscosity of the thickener was measured using a rotational viscometer, and since the thickener is often used in repairs on bridges and other structures that are subject to a lot of vibration, a viscosity measurement that corresponds to actual use was required.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mortar material having good fluidity and excellent filling properties. [Means for solving the problem]

[0007] As a result of intensive research into solving the above-mentioned problems, the present inventors have found that the problems can be solved by setting the vibration viscosity measured with a vibration viscometer to fall within a predetermined range, and have arrived at the present invention. [1] The vibration viscosity of mortar immediately after mixing with a standard water ratio measured with a vibration viscometer is 50 to 600 (mPa·s·g / cm 3 ) is a mortar material. [2] The mortar material according to [1], which contains fine aggregate, and the fine aggregate has a particle size ratio of 1.2 to 2.2. [3] The mortar material according to [1] or [2], containing cement, an expansive material, and fine aggregate, wherein the ratio of the mass of the fine aggregate to the mass of the binder including the cement and the expansive material is 60 to 230%. [4] The mortar material according to any one of [1] to [3], wherein the fine powder passed through a sieve with 90 μm openings contains 0.03 mass % or more of TiO2 as a chemical component. [5] The mortar material according to any one of [1] to [4], wherein the fine powder passed through a sieve with 90 μm openings contains 0.05 to 5 mass % of P2O5 as a chemical component. [6] The mortar material according to any one of [1] to [5], which contains a foaming substance. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a mortar material having good fluidity and excellent filling properties. DETAILED DESCRIPTION OF THE INVENTION

[0009] The mortar material of the present invention will be described in detail below, but the present invention is not limited to this embodiment. In this specification, "%" and "parts" are based on mass unless otherwise specified. Furthermore, a numerical range defined using the symbol "to" includes both the upper and lower limits of the range.

[0010] [Mortar materials] The mortar material of this embodiment has a vibration viscosity of 50 to 600 (mPa·s·g / cm) measured by a vibration viscometer immediately after mixing with a standard water ratio. 3 The vibration viscosity is 80 to 500 (mPa·s·g / cm 3 ), and 100 to 400 (mPa·s·g / cm 3 ) is more preferable. The vibration viscosity is 50 (mPa·s·g / cm 3 ), dripping occurs easily when the mortar is applied to the wall, and workability such as trowel finishing is reduced. 3 ), it becomes difficult to inject mortar deep into the crack to be repaired, and the filling ability of the mortar decreases.

[0011] The vibration viscosity can be adjusted to the above range by adding a thickener, which will be described later, or by adjusting the particle size of the fine aggregate, which will be described later. By making the particle size finer, the vibration viscosity can be lowered, and by making the particle size coarser, the vibration viscosity can be increased.

[0012] Note that mixing at a standard water ratio means adding 15 to 21 parts by mass of water to 100 parts by mass of mortar material and mixing, and the vibration viscosity value is the value measured for this mortar. "Immediately after mixing" means that measurement should be started within 5 minutes after the completion of mixing, and the vibration viscosity measured is the vibration viscosity 1 minute after the start of measurement.

[0013] A vibration viscometer measures the viscosity of a liquid by placing a vibrator in the mortar to be measured and detecting the force required for vibration when the vibrator is vibrated under a constant displacement condition. The vibration viscometer measures vibrational viscosity, which is the product of viscosity and density. Since vibration viscosity measurement measures the viscosity while vibrating the mortar, it is possible to suppress sedimentation and separation of the mortar during measurement, resulting in more accurate viscosity measurements. Also, compared to rotational viscometers, it is possible to suppress the temperature rise of the mortar due to frictional heat, making it possible to measure viscosity without considering temperature changes due to the measurement method. Furthermore, since it is a simple measurement, it can be performed on-site, making it possible to measure the vibration viscosity of mortar that is actually used.

[0014] The instrument used to measure the vibration viscosity is not particularly limited, but for example, a tuning fork vibration viscometer SV-10 (manufactured by A&D Co., Ltd.) can be used.

[0015] By setting the vibration viscosity of the mortar material of this embodiment, measured with a vibration viscometer, within the above range, the mortar material can be made into a mortar that has good fluidity and excellent filling properties, allowing the mortar to be filled deep into cracks and other cracks to be repaired.

[0016] (Composition of mortar materials) Next, the composition of the mortar material of this embodiment will be described. The mortar material of this embodiment preferably contains cement, an expansive material, and a fine aggregate.

[0017] [cement] The cement used in this embodiment is not particularly limited, and examples include various cements such as normal, early-strength, ultra-early-strength, low-heat, and moderate-heat cements, various blended cements in which these cements are mixed with blast furnace slag, fly ash, or silica fume, environmentally friendly cements (ecocement) made from municipal waste incineration ash or sewage sludge incineration ash, and commercially available fine particle cements. It is also possible to use various cements and blended cements that have been finely powdered. Furthermore, cements that have been adjusted by increasing or decreasing the amount of components (such as gypsum) normally used in cements can also be used. In this embodiment, it is preferable to select ordinary Portland cement or high-early-strength Portland cement from the viewpoints of heat of hydration, drying shrinkage, and fillability.

[0018] Furthermore, when TiO2 and P2O5 are contained as chemical components in fine powder that has passed through a 90 μm mesh sieve as described below, cement can be produced by, for example, mixing a CaO raw material, a SiO2 raw material, an Al2O3 raw material, and an Fe2O3 raw material, and optionally a TiO2 raw material and a P2O5 raw material, firing the mixture to synthesize clinker, and pulverizing the resulting mixture in a ball mill. In this case, the CaO content is preferably 10 to 70 mass%, the Al2O3 content is preferably 1 to 20 mass%, and the Fe2O3 content is preferably 0.1 to 40 mass%.

[0019] Examples of the CaO raw material that can be used include calcium oxide powder and limestone powder, examples of the Al2O3 raw material that can be used include aluminum oxide powder and bauxite powder, examples of the Fe2O3 raw material that can be used include iron oxide powder, examples of the SiO2 raw material that can be used include silicon dioxide powder and silica powder, examples of the TiO2 raw material that can be used include titanium oxide powder, and examples of the P2O5 raw material that can be used include calcium phosphate powder.

[0020] The cement used in this embodiment has a Blaine specific surface area of ​​2,500 cm from the viewpoint of manufacturing cost and strength development. 2 / g or more 7,000cm 2 / g or less, and 2 / g or more 6,000cm2 / g or less is more preferable, and 2 / g or more 4,500cm 2 It is more preferable that the saturation coefficient is 1 / g or less. The Blaine specific surface area value is determined in accordance with JIS R 5201 (physical testing method for cement).

[0021] [Expansive material] The expanding agent used in this embodiment is not particularly limited, and any agent that can generate an expansive hydrate and suppress bleeding can be used. Known expansive materials include free lime, free magnesia, calcium ferrite, ettringite, lime, and ettringite-lime composites, and although not particularly limited, those containing free lime are preferred from the viewpoint of long-term stability. Examples of those containing free lime include free lime-anhydrous gypsum systems, free lime-hydraulic compound systems, and free lime-hydraulic compound-anhydrous gypsum systems.

[0022] In this embodiment, it is preferable to use a free lime-hydraulic compound-anhydrous gypsum system because of its good expansion performance, and it is particularly preferable to use a system having a free lime content of more than 40 mass %. Here, examples of the hydraulic compound include one or more of auin, calcium ferrite, calcium aluminoferrite, calcium silicate, calcium aluminate, etc. In this embodiment, commercially available expansive materials and static crushing materials can be used as the expansive material. Expansion agents and static crushing agents are commercially available from various companies, and representative examples include Denka CSA#20 and Denka Power CSA manufactured by Denka Co., Ltd., and Expan, Hyperexpan, N-EX, and Blaister manufactured by Pacific Materials Corporation, as well as crushed products of these.

[0023] The particle size of the expanding material used in this embodiment is not particularly limited, but is preferably 2,000 cm in terms of Blaine specific surface area. 2 / g or more 25,000cm2 / g or less is preferable, and 2 / g or more 15,000cm 2 / g or less is more preferable, and 2,400 cm 2 / g or more 10,000cm 2 / g or less is more preferable. When the Blaine specific surface area of ​​the expanding material is equal to or greater than the lower limit, bleeding can be suppressed. When the Blaine specific surface area of ​​the expanding material is equal to or less than the upper limit, sufficient expansion can be obtained.

[0024] The content of the expansive agent used in this embodiment is preferably 0.5 parts by mass or more and 20 parts by mass or less, more preferably 1 part by mass or more and 18 parts by mass or less, and even more preferably 2 parts by mass or more and 15 parts by mass or less, relative to 100 parts by mass of cement. When the content of the expansive agent is equal to or greater than the above lower limit, it becomes easier to obtain a crack suppression effect. On the other hand, when the content of the expansive agent is equal to or less than the above upper limit, strength development becomes good. When the content of the expansive agent is within the above range, it becomes easy to obtain a mortar with excellent drying shrinkage and filling properties.

[0025] [Fine aggregate] The fine aggregate used in this embodiment can be any commonly used fine aggregate, such as river sand, mountain sand, crushed sand, lime sand, silica sand, colored sand, sea sand, or a combination of these.

[0026] The coarse particle ratio of the fine aggregate is preferably 1.2 to 2.2, more preferably 1.2 to 2.1, and even more preferably 1.3 to 2.0. By setting the coarse particle ratio of the fine aggregate within the above range, excellent fluidity can be obtained. The coarse particle ratio can be calculated based on JIS A 1102:2014 "Sieving test method for aggregates."

[0027] Furthermore, the ratio of the mass of the fine aggregate to the mass of the binder containing cement and expansive agent is preferably 60 to 230%, more preferably 80 to 220%, and even more preferably 90 to 210%. By setting the ratio of the fine aggregate within the above range, the fluidity retention effect and thick application ability can be improved.

[0028] [Thickener] The mortar material of this embodiment may contain a thickener. The thickener can adjust the vibration viscosity of the mortar. Examples of thickeners include water-soluble polymers such as methyl cellulose (MC), carboxymethyl cellulose (CMC), polyvinyl alcohol (PVA), polyacrylamide, and polyethylene oxide (PEO). In order to keep the vibration viscosity within the above range, the content of the thickener is preferably 0.01 parts by mass or more and 0.1 parts by mass or less, and more preferably 0.02 parts by mass or more and 0.08 parts by mass or less, per 100 parts by mass of cement.

[0029] [Foaming substance] The mortar material of this embodiment preferably contains a foaming substance. The foaming substance is used for the purpose of more effectively preventing subsidence or shrinkage of the mortar in an unhardened state due to bleeding after application of the mortar. The foaming substance is preferably a gas foaming substance that generates gas after being mixed with water.

[0030] Examples of gas foaming substances include oily substances such as vegetable oils and mineral oils. Examples of gas foaming substances include powdery substances such as flaky aluminum powder surface-treated with stearic acid or the like, and aluminum powder produced by atomization. Examples of gas foaming substances include nitrogen gas foaming substances that foam nitrogen gas in an alkaline atmosphere, such as azo compounds, nitroso compounds, and hydrazine derivatives. Examples of gas foaming substances include percarbonates such as sodium percarbonate, potassium percarbonate, and ammonium percarbonate; perborates such as sodium perborate and potassium perborate; permanganates such as sodium permanganate and potassium permanganate; and peroxides such as hydrogen peroxide.

[0031] As the gas foaming substance, it is preferable to use flaky aluminum powder that has been surface-treated with stearic acid or the like, because this has a large effect of suppressing sinking.

[0032] From the viewpoint of further suppressing bleeding, the content of the foaming substance in the mortar is preferably 0.0001 to 1%, more preferably 0.0005 to 0.5%, and even more preferably 0.001 to 0.2%.

[0033] [Water reducing agent] The mortar material of the present embodiment preferably contains a water reducing agent. The water-reducing agent helps to disperse each material and also improves the fluidity of the mixed grout material.

[0034] The water-reducing agent is not particularly limited, and examples thereof include naphthalene-based water-reducing agents, melamine-based flow-through water-reducing agents, aminosulfonic acid-based water-reducing agents, and polycarboxylic acid-based water-reducing agents, which can be used alone or in combination.

[0035] Specific examples of water-reducing agents include naphthalene-based water-reducing agents manufactured by NMB Corporation under the trade name "Leobuild SP-9 Series," Kao Corporation under the trade name "Mighty 2000 Series," and Nippon Paper Industries Co., Ltd. under the trade name "Sunflow HS-100." Melamine-based water-reducing agents include Sika Japan Ltd. under the trade name "Sikament 1000 Series" and Nippon Paper Industries Co., Ltd. under the trade name "Sunflow HS-40." Aminosulfonic acid-based water-reducing agents include Fujisawa Pharmaceutical Co., Ltd. under the trade name "Paric FP-200 Series." Polycarboxylic acid-based water-reducing agents include NMB Corporation under the trade name "Leobuild SP-8 Series," Grace Chemicals Corporation under the trade name "Darlex Super 100PHX," and Takemoto Oil & Fat Co., Ltd. under the trade names "Chupol HP-8 Series" and "Chupol HP-11 Series."

[0036] Powdered water-reducing agents are also available. Specific examples of naphthalene-based water-reducing agents include "Mighty 100" manufactured by Kao Corporation, "Sanyo Revellon P" manufactured by Sanyo Chemical Industries, Ltd., and "Celluflow 110P" manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd. Melamine-based water-reducing agents include "Melment F10M" manufactured by BASF Pozzolith, Ltd. Polycarboxylic acid-based water-reducing agents include "Queenflow 750" manufactured by Mitsubishi Chemical Corporation and "CAD9000P" manufactured by Kao.

[0037] From the viewpoint of better fluidity, the content of the water reducing agent in the mortar is preferably 0.1 to 2% in terms of solid content, more preferably 0.2 to 1.8%, and even more preferably 0.3 to 1.0%.

[0038] Furthermore, in the mortar material of this embodiment, the fine powder that has passed through a 90 μm mesh sieve preferably contains 0.03 mass % or more of TiO2 as a chemical component, more preferably 0.03 to 5 mass %, and even more preferably 0.05 to 3 mass %. By containing 0.03 mass % or more of TiO2 as a chemical component, it is possible to impart thixotropy to the mortar, thereby exhibiting good filling properties and making material separation less likely to occur. To contain 0.03 mass % or more of TiO2 as a chemical component, a material containing TiO2 (e.g., titanium oxide) may be used. Furthermore, since fine powders with a sieve size of 90 μm or less have a relatively high initial reactivity, it is presumed that the function of TiO2, i.e., the above-mentioned thixotropy, is more easily exhibited when a certain amount of TiO2 is contained in the fine powder.

[0039] In the mortar material of this embodiment, the fine powder that has passed through a 90 μm mesh sieve preferably contains 0.05 to 5 mass % of P2O5 as a chemical component, and more preferably 0.08 to 3 mass %. By setting the P2O5 content to 0.05 to 5 mass %, fluidity can be easily maintained and flow-down, etc. can be suppressed. To contain 0.05 to 5 mass % of P2O5 as a chemical component, a material containing P2O5 (for example, calcium phosphate) can be used.

[0040] [Mortar manufacturing method] The mortar material of this embodiment is mixed with water to produce mortar. The mortar material may be prepared by mixing the respective materials at the time of construction, or may be prepared by mixing some or all of the materials in advance. The method of mixing the respective materials and water is not particularly limited, and the respective materials may be mixed at the time of construction, or may be mixed some or all of the materials in advance. Alternatively, some of the materials may be mixed with water, and then the remaining materials may be mixed.

[0041] Any existing mixer can be used as the mixer, and examples of such mixers include a tilting mixer, an omni mixer, a Henschel mixer, a V-type mixer, and a Nauta mixer.

[0042] The amount of water used during mixing is not particularly limited, as it varies depending on the purpose and application of use and the content of each material, but is preferably 10 to 200 parts by mass, more preferably 12 to 150 parts by mass, and even more preferably 14 to 100 parts by mass, per 100 parts by mass of the aforementioned cement. When the amount of water used for mixing is equal to or greater than the above lower limit, fluidity is improved and workability is further improved. Furthermore, when the amount of water used for mixing is equal to or less than the above upper limit, strength development is more easily ensured.

[0043] (Application) The mortar according to this embodiment can be suitably used for plastering work, etc., as a base material, finishing material, repair material, joint material, etc., and is particularly preferably used as a repair material. In particular, a repair material containing the mortar of this embodiment is preferred. In this case, the mortar composition is preferably contained in an amount of 90 mass % or more, and more preferably 100 mass %.

[0044] When used as a repair material, examples of the repair target include hardened mortar or concrete parts that have deteriorated, damaged, or been broken. Some repair areas are large, while others are small, and the repair method is selected based on the repair area and the amount of repair material to be applied. For relatively large areas, spraying is often used. On the other hand, for small repair areas, trowel application is preferred. When performing partial cross-sectional repair, the area is small but the thickness of the repair material is often thick, so a method of applying multiple layers is used. [Example]

[0045] The present invention will be explained in more detail below by way of examples, but the present invention is not limited to these examples.

[0046] (Materials used) Cement: Denka "ordinary cement" ·CaO raw material: limestone powder ·Al2O3 raw material: bauxite powder Fe2O3 raw material: iron oxide powder SiO2 raw material: silica powder ·TiO2 raw material: titanium oxide powder P2O5 raw material: calcium phosphate powder Expansion material: Denka Power CSA (manufactured by Denka) Fine aggregate: crushed sand (derived from limestone) Thickener: Methylcellulose, commercially available Foaming material (gas foaming material): flaky aluminum powder surface-treated with stearic acid, commercially available Water reducing agent: Naphthalene-based water reducing agent, "Cellflow 110P" manufactured by Daiichi Kogyo Seiyaku Co., Ltd. Water: Tap water

[0047] <Experimental Example 1> (Mortar manufacturing) Mortar was produced by mixing cement, expansive additive, fine aggregate, and water in the proportions shown in Table 1. 1.0 part by mass of water-reducing agent was mixed per 100 parts by mass of cement. 0.01 to 0.1 part by mass of thickener was mixed per 100 parts by mass of cement to achieve the vibration viscosity shown in Table 1.

[0048] Mortar was also prepared separately for vibration viscosity measurement. 100 parts by mass of mortar material was mixed with 18 parts by mass of water. Measurement was started within 5 minutes after mixing was completed, and the vibration viscosity was measured 1 minute after the start of measurement using a tuning fork vibration viscometer SV-10 (manufactured by A&D Co., Ltd.).

[0049] The mortar was subjected to the following filling test to evaluate the void ratio and fluidity. The results are shown in Table 1.

[0050] <Filling rate of filling test> Mortar is poured into a box-shaped container measuring 100cm long, 100cm wide and 5cm high, with a 4cm diameter hole in the centre of each of two opposing sides, through one of the holes. Pouring of the mortar is stopped when the mortar flows out of the other hole. After the mortar has hardened, the container is removed and the filling rate of the mortar is measured over an area of ​​100cm x 100cm on the top surface. To determine the filling rate, prepare a 100cm x 100cm vinyl sheet and stick it on the top of the hardened piece to mark the unfilled areas. The marked area is cut away, and the weight of the vinyl with only the filled area remaining is measured and calculated using the formula below. Filling rate (%) = weight of vinyl in filled area (g) / total weight of vinyl (g) A higher filling rate is preferable.

[0051] <Liquidity> In accordance with JSCE-F541, the J14 funnel flow rate was measured in a 30°C environment immediately after mixing (immediately after preparing the mortar) and 30 minutes later. The fluidity immediately after mixing is preferably 6 to 10 seconds, and the fluidity after 30 minutes is preferably 20 seconds or less.

[0052] [Table 1]

[0053] As shown in Table 1, the vibration viscosity is 50 to 600 (mPa·s·g / cm 3 In Test Nos. 1-2 to 1-4, which are in the range of ), good results were obtained in terms of both the filling rate and fluidity. Vibration viscosity is 50 (mPa·s·g / cm 3 In Test No. 1-1, where the filling rate was less than 600 (mPa·s·g / cm), the filling rate could not be measured and the fluidity was low. 3 In Test Nos. 1-5, the filling rate was less than 90% and the fluidity was poor.

[0054] <Experimental Example 2> Mortar was produced in the same manner as in Experimental Example 1, except that the fine aggregate fraction (FM) and the fine aggregate / (cement + expansive additive) ratio were changed. The results are shown in Table 2.

[0055] [Table 2]

[0056] As shown in Table 2, Test Nos. 1-3 and 2-2-3, where the fine aggregate fineness ratio (FM) was in the range of 1.2 to 2.2, showed high filling rates and good fluidity. Test Nos. 1-3 and 2-7-8, where the fine aggregate / (cement + expansive additive) ratio was 60 to 230%, also showed high filling rates and good fluidity.

[0057] <Experimental Example 3> (Mortar manufacturing) The CaO raw material, Al2O3 raw material, Fe2O3 raw material, SiO2 raw material, TiO2 raw material, and P2O5 raw material were mixed so that the chemical components were in the proportions shown in Table 1, and then fired at 1,350°C to synthesize clinker, which was then milled in a ball mill to a Blaine specific surface area of ​​3,500 cm 2 The cement, expansive material, fine aggregate, and water were mixed in the proportions shown in Table 3. 1.0 part by mass of water-reducing agent was mixed with 100 parts by mass of cement.

[0058] The chemical composition of the prepared cement was measured, and the TiO2 and P2O5 contents of the fine powder that passed through a sieve with 90 μm openings were measured. CaO, Al2O3, Fe2O3, and SiO2 were measured by X-ray fluorescence diffraction (XRF). TiO2 and P2O5 were also measured by X-ray fluorescence diffraction (XRF). The "other" components in the table are trace components such as SO3, MgO, Na2O, and K2O.

[0059] The vibration viscosity of the produced mortar material was measured. The porosity and fluidity of the produced mortar were also evaluated in a filling test. The results are shown in Table 3.

[0060] [Table 3]

[0061] As shown in Table 3, by adding 0.03 mass% or more of TiO2 to the fine powder, the filling rate could be increased and the fluidity was also good. Furthermore, by adding 0.05 to 5 mass% of P2O5 to the fine powder, the filling rate could be increased and a decrease in fluidity could be prevented.

[0062] (Experimental Example 4) Except for mixing a foaming substance when producing the mortar, the mortar was produced in the same manner as in Experimental Example 1. The results are shown in Table 4.

[0063] [Table 4]

[0064] As shown in Table 4, Test No. 4-1, which used a foaming agent, showed good results in terms of both filling rate and fluidity, similar to Test No. 1-3, which did not use a foaming agent. Also, although not shown in Table 4, Test No. 4-1 was able to prevent the unhardened mortar from settling and shrinking due to bleeding. [Industrial Applicability]

[0065] The mortar material of the present invention can be suitably used for plastering work, etc., as a base material, finishing material, repair material, joint material, etc.

Claims

1. The vibration viscosity of the mortar immediately after mixing with a standard water ratio, measured with a vibration viscometer, is 50 to 600 (mPa·s·g / cm ３ ) is a mortar material.

2. Contains fine aggregate, The mortar material according to claim 1, wherein the coarse particle ratio of the fine aggregate is 1.2 to 2.

2.

3. Contains cement, expansive material, and fine aggregate, The mortar material according to claim 1 or 2, wherein the ratio of the mass of the fine aggregate to the mass of the binder containing the cement and the expansive material is 60 to 230%.

4. The fine powder passed through a sieve with an opening of 90 μm contained TiO as a chemical component. ２ The mortar material according to claim 1 or 2, containing 0.03 mass% or more of

5. The fine powder passed through a sieve with an opening of 90 μm contained the following chemical components: ２ O ５ The mortar material according to claim 1 or 2, containing 0.05 to 5 mass% of

6. 3. The mortar material according to claim 1, further comprising a foaming agent.

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