JP2007046337A - Filling material for pavement body and water retaining pavement body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress a temperature rise on a surface over a rather long period by including a diatomacious filter aid with good moisture absorbing and releasing properties into a water retaining material. <P>SOLUTION: This filling material for a pavement body including a cement binding material and the water retaining material contains the 30 to 80 pts.mass diatomacious filter aid of 0.1 to 50 μm in particle size in the water retaining material when the water retaining material is 100 pts.mass. The water retaining pavement body is formed of a pavement body with a porosity of 10 to 40% and a mixture filled in the cavity portions of the pavement body. The mixture comprises a 100 pts.mass cement-based binder, a 5 to 80 pts.mass water retaining material including the diatomacious filter aid, and 50 to 300 pts.mass water. The water retaining material desirably contains a 30 to 80 pts.mass diatomacious filter aid of 0.1 to 50 μm in particle size when the water retaining material is 100 pts.mass. Further, the water retaining material may be included in one or both of a non-baked vermiculite with water retaining property and a paper-making sludge-burned ash. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an injection material for pavement used for a pavement having a water retention function excellent in sustainability of a temperature rise suppression effect and the water retention pavement.

Conventionally, as a water-retaining pavement, a technique for injecting a kneaded material containing a water-retaining material into a gap portion of the pavement is known. And it is proposed to use non-fired vermiculite, papermaking sludge or diatomaceous earth as a water-retaining material having a high water-retaining capability, or a mixture of these at an appropriate ratio and using a small addition amount (see, for example, Patent Document 1). ing. In other words, a water-holding material with a high water-holding capacity is mixed with a cement-based binder to produce an injection material for pavement, and this is mixed with water at the construction site to fill the voids of the pavement. To obtain a water-retaining pavement. In this water-retaining pavement, when the surface temperature rises, moisture contained in the water-retaining material evaporates and takes heat, and it is possible to suppress an increase in the surface temperature of the pavement.
Japanese Patent Laying-Open No. 2005-48403 (Claims)

However, in the above-mentioned conventional water-retaining pavement, the sustainability is short in 3 or 4 days after receiving water supply by rain or watering in the summer, and the road surface temperature rises by supplying water once. A technique for sustaining the suppression effect has been desired.
An object of the present invention is to provide a pavement injection material and a water-retaining pavement that can suppress the temperature rise of the surface for a relatively long time.

The invention according to claim 1 is an improvement of an injecting material for a pavement including a cement-based binder and a water retention material.
The characteristic configuration is that when the water retention material is 100 parts by mass, 30 to 100 parts by mass of a diatomaceous filter aid having a particle size of 0.1 to 50 μm is contained in the water retention material.
The invention according to claim 8 is composed of a pavement having a porosity of 10 to 40% and a kneaded material filled in a void part of the pavement, and the kneaded material is 100 parts by mass of a cement-based binder and a diatomaceous filter aid. It is a water-retaining pavement containing 5 to 80 parts by mass of a water-retaining material containing 50 and 300 to 300 parts by mass of water.
The invention according to claim 9 is the invention according to claim 8, wherein when the water retention material is 100 parts by mass, the water retention material is 30 to 100 diatomaceous filter aid having a particle size of 0.1 to 50 μm. It includes a mass part.

The diatomaceous filter aid is generally excellent in moisture absorption and desorption, and in the injecting material for pavement according to claim 1, wherein the diatomaceous filter aid contains the diatomaceous filter aid in the water retaining material, the diatomaceous filter aid is A water retention material that adsorbs water vapor in the atmosphere and contains the diatomaceous filter aid retains its moisture.
For this reason, in the water-retaining pavement according to claim 8 and claim 9, the kneaded material obtained by mixing the injection material for pavement with water at the construction site is filled in the gap portion of the pavement. Even in a state where water is not replenished, etc., water vapor in the atmosphere is adsorbed. Furthermore, when the surface temperature starts to rise when receiving heat from solar radiation, the water vapor in the atmosphere adsorbed by the diatomaceous filter aid evaporates and takes heat away, and the surface temperature of the pavement increases significantly. Suppress. As a result, even in a state where water is not replenished by rain or watering, the temperature rise on the surface can be suppressed for a relatively long time.

The invention according to claim 2 is an improvement of an injecting material for pavement including a cement-based binder and a water retention material.
The characteristic configuration is that when the water retention material is 100 parts by mass, the water retention material is 30 to 80 parts by mass of a diatomaceous filter aid having a particle size of 0.1 to 50 μm and a natural particle size of 20 to 400 μm. It exists in the place where 20-70 mass parts of non-baked vermiculite was contained.
The invention according to claim 3 is an improvement of an injecting material for a pavement including a cement-based binder and a water retention material.
The characteristic structure is that when the water retention material is 100 parts by mass, the water retention material is mainly 30 to 80 parts by mass of a diatomaceous filter aid having a particle size of 0.1 to 50 μm and a particle size of 5 to 1000 μm. There are 20 to 70 parts by mass of papermaking sludge incineration ash composed of SiO ₂ and Al ₂ O _{3 as} components.
The invention according to claim 4 is an improvement of an injection material for pavement including a cement-based binder and a water retention material.
The characteristic structure is that when the water retention material is 100 parts by mass, the water retention material is 30 to 80 parts by mass of a diatomaceous filter aid having a particle size of 0.1 to 50 μm and a natural particle size of 20 to 400 μm. There are 20 to 50 parts by mass of unbaked vermiculite, 20 to 50 parts by mass of paper sludge incinerated ash having a particle diameter of 5 to 1000 μm and main components of SiO ₂ and Al ₂ O ₃ .

  Since both non-fired vermiculite and paper sludge incineration ash have excellent water retention, either or both of non-fired vermiculite and paper sludge incineration ash are included in the water retention material. In the pavement injection material, the diatomaceous filter aid adsorbs water vapor in the atmosphere, and the water retention material containing the diatomaceous filter aid effectively retains the water.

The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the water-retaining material is 5 to 80 parts by mass when the cementitious binder is 100 parts by mass. Features.
In the injection material for pavement according to the fifth aspect, it is possible to effectively ensure moisture absorption / release and water retention in a kneaded material obtained by mixing the injection material for pavement with water.

In the invention according to claim 6, when the cementitious binder of the injection material for pavement according to any one of claims 1 to 5 is 100 parts by mass, water is added to the injection material for pavement in an amount of 50 to 300 masses. A water-retaining cured body obtained by curing a kneaded product containing parts, wherein the moisture absorption rate at an air temperature of 20 ° C. and a relative humidity of 80% is 10 to 15% by mass.
In the invention according to claim 7, when the cementitious binder of the pavement injection material according to any one of claims 1 to 5 is 100 parts by mass, water is added to the pavement injection material in an amount of 50 to 300 masses. A water-retaining cured body obtained by curing a kneaded product containing a part, wherein the maximum water absorption is 25 to 90% by mass.

  In the water-retaining cured body described in claims 6 and 7, it absorbs water vapor in the atmosphere even when it is not replenished with water due to rainfall or watering by being filled in the gap portion of the pavement. When the surface temperature starts to rise when receiving heat from solar radiation, the adsorbed water vapor evaporates and takes away heat, and the surface temperature of the pavement can be effectively suppressed from rising significantly. .

The invention according to claim 10 is the invention according to claim 8, wherein when the water retention material is 100 parts by mass, the water retention material is 30 to 80 diatomaceous filter aid having a particle size of 0.1 to 50 μm. It contains 20 to 70 parts by mass of natural unfired vermiculite having a mass part and a particle size of 20 to 400 μm.
The invention according to claim 11 is the invention according to claim 8, wherein when the water retention material is 100 parts by mass, the water retention material is 30 to 80 diatomaceous filter aid having a particle size of 0.1 to 50 μm. It is characterized by containing 20 to 70 parts by mass of paper sludge incinerated ash composed of part by mass and having a particle diameter of 5 to 1000 μm and main components of SiO ₂ and Al ₂ O ₃ .
The invention according to claim 12 is the invention according to claim 8, wherein when the water retention material is 100 parts by mass, the water retention material is 30 to 80 diatomaceous filter aid having a particle size of 0.1 to 50 μm. 20 to 50 parts by mass of natural unfired vermiculite having a particle size of 20 to 400 μm, and 20 to 50 of paper sludge incinerated ash composed of SiO ₂ and Al ₂ O _{3 as} main components having a particle size of 5 to 1000 μm. It includes a mass part.

  In the water-retaining pavement described in claims 10 to 12, since either one or both of non-fired vermiculite and paper sludge incineration ash having excellent water retention are contained in the water-retaining material, a diatomaceous filter aid Adsorbs water vapor in the atmosphere and the water retention material containing the diatomaceous filter aid effectively retains the water content, and does not receive water replenishment due to rainfall or sprinkling. Further, it can be suppressed for a long time.

  The injection material for pavement of the present invention contains a diatomaceous filter aid that is generally excellent in moisture absorption / release properties in the water-retaining material, so that the diatomaceous filter aid adsorbs water vapor in the atmosphere. A water retention material containing a diatomaceous filter aid can retain its moisture. For this reason, in the water-retaining pavement of the present invention in which the kneaded material obtained by mixing this pour-injection material with water at the construction site is filled in the void portion of the pavement, water supply by rain or watering is performed. Even if it is in a state where it does not receive heat, when the surface temperature starts to rise when it receives heat from solar radiation, the moisture in the atmosphere adsorbed by the diatomaceous filter aid evaporates and deprives the heat of the pavement. Even if the surface temperature is suppressed from being significantly increased and water is not replenished, the temperature increase of the surface can be suppressed for a relatively long time. In this case, if one or both of non-fired vermiculite and paper sludge incineration ash having excellent water retention are included in the water retention material, water vapor in the atmosphere adsorbed by the diatomaceous filter aid is added to the water retention material. Water can be effectively retained, and the temperature rise of the surface can be suppressed for a longer time in a state where water is not replenished.

Next, the best mode for carrying out the present invention will be described with reference to the drawings.
The injection material for pavements in the present invention includes a cement-based binder and a water retention material. Examples of the cement-based binder include ultrafast cement, ordinary Portland cement, early-strength Portland cement, and white cement. The ultrafast cement used in the present invention is a cement obtained by mixing 5 to 100 parts by mass of a rapid-hardening component consisting of calcium aluminate and anhydrous gypsum with 100 parts by mass of Portland cement. MG-5 (Mitsubishi Materials Etc.). In addition, examples of the quick-hardening component composed of calcium aluminate and anhydrous gypsum include Coca Ace (manufactured by Mitsubishi Materials Corporation), Cosmic (Electrochemical Industry Co., Ltd.), and the like, and these are used by appropriately mixing with Portland cement.

  On the other hand, the water retention material includes a diatomaceous filter aid having a particle size of 0.1 to 50 μm. This diatomaceous filter aid is in the form of a powder made from diatomaceous earth as a raw material and has a moisture absorption function for adsorbing water vapor in the atmosphere. Specifically, this diatomaceous filter aid is obtained by pulverizing natural diatomaceous earth and firing at 800 ° C. to 1200 ° C., or by adding a small amount of soda ash to pulverized natural diatomaceous earth. That is, the diatomaceous filter aid used for this water retention material is not a naturally occurring natural product but an artificially created artificial product. Here, the particle diameter of the diatomaceous filter aid is 0.1 to 50 μm. If the particle diameter is less than 0.1 μm, the porous property of the diatomaceous filter aid is lost and the hygroscopic ability is lacking. In other words, if the particle diameter exceeds 50 μm, it becomes difficult to fill the void portion of the pavement. And the preferable particle diameter of a diatomaceous filter aid is 1-30 micrometers. As a water retention material, it can be used as a diatomaceous filter aid having a particle size of 0.1 to 50 μm.

Further, the water-retaining material can further contain either one or both of non-fired vermiculite and papermaking sludge incineration ash. The non-fired vermiculite in this case is preferably a powder, and natural non-fired vermiculite having a particle size of 20 to 400 μm, preferably 30 to 300 μm and a maximum water absorption of 5% or more is preferable. The more preferable maximum water absorption rate of this non-fired vermiculite is in the range of 10 to 30%. On the other hand, paper sludge incineration ash has a particle diameter of 5 to 1000 μm, preferably 10 to 500 μm, the main components are composed of SiO ₂ and Al ₂ O ₃ , and the maximum water absorption is 30% or more. Ashes are preferred, and more preferred maximum water absorption is in the range of 40-80%.

  When the water retention material contains diatomaceous filter aid and non-calcined vermiculite and does not contain paper sludge incineration ash, when the water retention material is 100 parts by mass, the water retention material is 30 diatomaceous filter aid. ~ 80 parts by weight, preferably 20 to 70 parts by weight of natural unfired vermiculite, more preferably 40 to 70 parts by weight of diatomaceous filter aid, and more preferably 30 to 60 parts by weight of natural unfired vermiculite.

  In addition, when the water retention material contains diatomaceous filter aid and paper sludge incinerated ash and does not contain unfired vermiculite, when the water retention material is 100 parts by mass, the water retention material is diatomaceous filter aid. Is preferably 30 to 80 parts by mass, paper sludge incineration ash is preferably 20 to 70 parts by mass, diatomaceous filter aid is 40 to 70 parts by mass, and paper sludge incineration ash is further included 30 to 60 parts by mass. preferable.

  Furthermore, when the water retention material includes diatomaceous filter aid, paper sludge incinerated ash, and non-fired vermiculite, when the water retention material is 100 parts by mass, the water retention material is 30 to 30 diatomaceous filter aid. 80 parts by weight, 20-50 parts by weight of natural unfired vermiculite, 20-50 parts by weight of paper sludge incineration ash are preferably contained, 40-70 parts by weight of diatomaceous filter aid, and 25-25 of natural unfired vermiculite. It is more preferable that 45 mass parts and 25-45 mass parts of papermaking sludge incineration ash are contained. With such a composition, water vapor absorbed by the diatomaceous filter aid can be retained for a relatively long period of time.

  As described above, the pavement injection material according to the present invention includes a cement-based binder and a water retention material. And in the compounding ratio, when a cementitious binder is 100 mass parts, it is preferable that a water retention material is 5-80 mass parts. When the water retention material is less than 5 parts by mass, a sufficient water retention effect cannot be obtained. Further, even if the water retaining material exceeds 80 parts by mass, not only a further water retaining effect is obtained, but also a sufficient pavement cannot be obtained because the strength is lowered. A particularly preferable value of the water retention material is 10 to 50 parts by mass.

  Here, a water-retaining pavement is obtained by filling the gap portion of the pavement with a kneaded product obtained by kneading water into the pavement injection material described above. And when the cementitious binder of the injection material for pavements is 100 parts by mass, the water-retaining cured body is obtained by curing a kneaded product containing 50 to 300 parts by mass of water in the injection material for pavements. Has a moisture absorption rate of 10 to 15% by mass at a temperature of 20 ° C. and a relative humidity of 80%, and the maximum water absorption rate of the water-retaining cured body is 25 to 90% by mass.

Next, the water-retaining pavement of the present invention will be described.
The water-retaining pavement of the present invention is composed of a pavement and a kneaded material filled in the voids of the pavement. The pavement used in the present invention has a porosity of 10 to 40%, and preferably a permeable concrete pavement, a permeable asphalt pavement, a permeable interlocking block, a permeable horizontal plate, a gravel, ballast, etc. Applies to The porosity of these pavements is 10 to 40%, and if the porosity is less than 10%, the injection amount of the water retention injecting material is not sufficient, and a sufficient water retention effect as a pavement cannot be obtained. It is not possible to fully demonstrate the rise suppression effect. If the porosity exceeds 40%, the strength of the pavement may be weakened, which may hinder the travel of the traveling vehicle. Therefore, the porosity of the pavement is preferably 10 to 40%, and more preferably 10 to 35%.

  The kneaded material filled in the void portion of the pavement is obtained by adding 50 to 300 parts by mass of water to the pavement injecting material in the present invention described above and kneading. That is, this kneaded material contains 5 to 80 parts by mass of a water retaining material containing 100 parts by mass of a cement-based binder, a diatomaceous filter aid, and 50 to 300 parts by mass of water. Therefore, when the water-retaining material does not include any of non-fired vermiculite and paper sludge incinerated ash, when the water-retaining material is 100 parts by mass, the water-retaining material is a diatomaceous filter having a particle size of 0.1 to 50 μm. It contains 100 parts by weight of auxiliary agent. When the water-retaining material contains diatomaceous filter aid and non-calcined vermiculite and does not contain paper sludge incineration ash, when the water-retaining material is 100 parts by mass, the water-retaining material has a particle size of 0.1 to 50 μm. 30 to 80 parts by mass of diatomaceous filter aid and 20 to 70 parts by mass of natural non-baked vermiculite having a particle size of 20 to 400 μm are preferable, and a more preferable range is 40 to 70 parts by mass of diatomaceous filter aid. Part and natural unbaked vermiculite is 30 to 60 parts by mass.

In addition, when the water retention material contains a diatomaceous filter aid and paper sludge incinerated ash and does not contain unfired vermiculite, when the water retention material is 100 parts by mass, the water retention material has a particle size of 0.1. It is preferable to contain 20 to 70 parts by mass of paper sludge incinerated ash consisting of 30 to 80 parts by mass of a diatomaceous filter aid of -50 μm and a particle size of 5 to 1000 μm and main components of SiO ₂ and Al ₂ O ₃ , More preferably, the diatomaceous filter aid is 40 to 70 parts by mass and the paper sludge incineration ash is 30 to 60 parts by mass. Furthermore, when the water-retaining material contains diatomaceous filter aid, paper sludge incinerated ash, and non-fired vermiculite, when the water-retaining material is 100 parts by mass, the water-retaining material has a particle diameter of 0.1 to 50 μm. 30 to 80 parts by mass of a diatomaceous filter aid, 20 to 50 parts by mass of natural unbaked vermiculite having a particle size of 20 to 400 μm, a main component of SiO ₂ and Al ₂ O ₃ with a particle size of 5 to 1000 μm. It is preferable to contain 20 to 50 parts by mass of paper sludge incinerated ash, more preferably 40 to 70 parts by mass of diatomaceous filter aid, 25 to 45 parts by mass of natural unfired vermiculite, and 25 of paper sludge incinerated ash. -45 parts by mass.

  By kneading 5 to 80 parts by mass of such a water-retaining material, 100 parts by mass of cementitious binder and 50 to 300 parts by mass of water, a kneaded product having a maximum water absorption rate of 25 to 90% can be obtained. it can. The reason why the amount of water is 50 to 300 parts by mass is that it is best to select the water content in this range in consideration of the injectability and workability of the water retaining material. And the water retention pavement of this invention is obtained by inject | pouring the kneaded material which has such a maximum water absorption into the space | gap part of a pavement. And by injecting such a kneaded material having a maximum water absorption rate of 25 to 90% into the void portion of the pavement, the effect of suppressing the temperature rise of the pavement surface is maintained for a long time, and the pavement surface is scraped or peeled off. This produces an excellent effect that a compressive strength with no practical problems can be obtained.

The following examples of the present invention will be described together with comparative examples.
<Example 1>
A cement-based binder and a water retention material were prepared. As the cement-based binder, a so-called ultra-fast cement with a ratio of ordinary Portland cement and fast-curing material of 60:40 was used. As this fast-hardening material, Coca Ace (manufactured by Mitsubishi Materials Corporation) was used. In addition, the water-retaining material used was a material containing a diatomaceous filter aid having a water absorption rate of 92.8% and a particle size of 0.1 to 50 μm and papermaking sludge incinerated ash. The papermaking sludge incineration ash used has a water absorption of 82.8%, an average particle size of 135 μm, and main components composed of SiO ₂ and Al ₂ O ₃ .
A re-emulsified powder resin and water were added and kneaded to the pavement injection material composed of such a cement-based binder and a water retention material to obtain a kneaded product. The re-emulsified powder resin is kneaded to prevent cracking of the cured product, and a re-emulsified powder resin (trade name: A1000) manufactured by Clariant Polymer Co., Ltd. was used. The ratio of cement-based binder, diatomaceous filter aid, paper sludge incinerated ash, re-emulsified powder resin, and water is 100: 2.5: 2.5: 4.0: 50, and its kneading method In a predetermined amount of water, a cement-based binder, a pavement injection material, and a re-emulsified powder resin were added and mixed with a laboratory stirrer. The kneaded product thus obtained was designated as Example 1.

<Example 2>
Except for cement-based binder, diatomaceous filter aid, paper sludge incineration ash, re-emulsified powder resin, and water ratio of 100: 12.5: 12.5: 4.0: 95 Thus, a kneaded material was obtained using the same materials and procedures as in Example 1. This kneaded material was referred to as Example 2.
<Example 3>
Examples except that the ratio of cement-based binder, diatomaceous filter aid, paper sludge incineration ash, re-emulsified powder resin, and water was 100: 25: 15: 4.0: 150 A kneaded material was obtained using the same materials and procedures as in 1. This kneaded material was referred to as Example 3.
<Example 4>
Examples except that the ratio of cement-based binder, diatomaceous filter aid, paper sludge incinerated ash, re-emulsified powder resin, and water was 100: 35: 25: 4.0: 250 A kneaded material was obtained using the same materials and procedures as in 1. This kneaded material was referred to as Example 4.
<Example 5>
Examples except that the ratio of cement-based binder, diatomaceous filter aid, paper sludge incineration ash, re-emulsified powder resin, and water was 100: 18: 42: 4.0: 250 A kneaded material was obtained using the same materials and procedures as in 1. This kneaded material was designated as Example 5.

<Example 6>
Examples except that the ratio of cement-based binder, diatomaceous filter aid, paper sludge incinerated ash, re-emulsified powder resin, and water was 100: 48: 12: 4.0: 250 A kneaded material was obtained using the same materials and procedures as in 1. This kneaded product was designated as Example 6.
<Example 7>
Examples except that the ratio of cement-based binder, diatomaceous filter aid, paper sludge incineration ash, re-emulsified powder resin, and water was 100: 45: 35: 4.0: 300 A kneaded material was obtained using the same materials and procedures as in 1. This kneaded material was referred to as Example 3.
<Examples 8 to 14>
Instead of the papermaking sludge incinerated ash of Examples 1 to 7, kneaded materials were obtained by the same materials, blending ratios and procedures as in Examples 1 to 7 except that unfired vermiculite was used. The non-fired vermiculite used had a water absorption of 44.5% and an average particle size of 25 μm. These kneaded materials were made into Examples 8-14.
<Example 15>
The water-retaining material is a simple diatomaceous filter aid, and the ratio of cement-based binder, diatomaceous filter aid, re-emulsified powder resin, and water is 100: 25: 4.0: 95. Except for this, a kneaded material was obtained using the same materials and procedures as in Example 1. This kneaded material was designated as Example 15.

<Example 16>
The water-retaining material has a simple diatomaceous filter aid, and the ratio of cement-based binder, diatomaceous filter aid, re-emulsified powder resin, and water is 100: 40: 4.0: 150. Except for this, a kneaded material was obtained using the same materials and procedures as in Example 1. This kneaded material was designated as Example 16.
<Example 17>
A diatomaceous filter aid as a water-retaining material, a cement-based binder, a diatomaceous filter aid, a re-emulsified powder resin, and a water ratio of 100: 60: 4.0: 250 Except for this, a kneaded material was obtained using the same materials and procedures as in Example 1. This kneaded material was designated as Example 17.
<Example 18>
A water-retaining material is made of diatomaceous filter aid, diatomaceous earth and paper sludge incinerated ash, cement-based binder, diatomaceous filter aid, diatomaceous earth, paper sludge incinerated ash, and re-emulsified powder resin. A kneaded material was obtained by the same material and procedure as in Example 1 except that the ratio of water was 100: 20: 20: 20: 4.0: 250. In this case, diatomaceous earth having a water absorption rate of 47.1% and an average particle size of 8.1 μm was used. This kneaded material was designated as Example 18.
<Example 19>
A water-retaining material is made of diatomaceous filter aid, diatomaceous earth and paper sludge incinerated ash, cement-based binder, diatomaceous filter aid, diatomaceous earth, paper sludge incinerated ash, and re-emulsified powder resin. A kneaded material was obtained by the same material and procedure as in Example 1 except that the ratio of water was 100: 30: 15: 15: 4.0: 250. This kneaded material was referred to as Example 19.
<Example 20>
A water-retaining material is made of diatomaceous filter aid, diatomaceous earth and paper sludge incinerated ash, cement-based binder, diatomaceous filter aid, diatomaceous earth, paper sludge incinerated ash, and re-emulsified powder resin. A kneaded material was obtained by the same material and procedure as in Example 1 except that the ratio of water was 100: 36: 12: 12: 4.0: 250. This kneaded material was referred to as Example 19.

<Comparative Example 1>
The same cementitious binder, paper sludge incineration ash, re-emulsified powder resin and water as in Example 1 were prepared. Separately, diatomaceous earth having a water absorption rate of 47.1% and an average particle size of 8.1 μm was prepared. The ratio of cement-based binder, diatomaceous earth, paper sludge incinerated ash, re-emulsified powder resin, and water was 100: 25: 15: 4.0: 150, and these were kneaded in the same manner as in Example 1. Thus, a kneaded product was obtained. The kneaded material thus obtained was designated as Comparative Example 1.
<Comparative example 2>
Instead of the papermaking sludge incinerated ash of Comparative Example 1, a kneaded material was obtained by the same material, mixing ratio and procedure as in Comparative Example 1 except that non-fired vermiculite was used. This kneaded material was referred to as Comparative Example 2.
In addition, Table 1 shows the materials used in Examples 1 to 20 and Comparative Examples 1 and 2 and their blend ratios.

<Evaluation Test 1 and Evaluation 1>
The kneaded materials in Examples 1 to 20 and Comparative Examples 1 and 2 were each poured into a 4 × 4 × 16 cm mold, molded, and demolded at a material age of 3 hours. These compressive strengths were determined by methods in accordance with the provisions of JIS-R-5201 “Physical testing method for cement”.
Table 1 shows the respective compressive strengths in Examples 1 to 20 and Comparative Examples 1 and 2 thus determined.
As is clear from the results in Table 1, the kneaded materials in Examples 1 to 20 and Comparative Examples 1 and 2 do not have a significant difference in the compressive strength. For this reason, it turns out that the injection | pouring material contained in Examples 1-20 of this invention can maintain the same intensity | strength as the conventional injection | pouring material contained in Comparative Examples 1 and 2. FIG.

<Evaluation Test 2 and Evaluation 2>
The kneaded materials in Examples 1 to 20 and Comparative Examples 1 and 2 were each poured into a 4 × 4 × 16 cm mold and demolded at a material age of 3 days. These were immersed in water at 20 ° C. for 24 hours or more, and then the weight was measured (saturated mass). The weights of those dried for 24 hours or more with a 60 ° C. ventilation dryer were measured (absolute dry mass). From these, the maximum water absorption was calculated by the following equation.
Maximum water absorption rate (%) = 100 × (saturated mass−absolute dry mass) / absolute dry mass Table 1 shows the maximum water absorption rates in Examples 1 to 20 and Comparative Examples 1 and 2 determined by this equation.
As is apparent from the results in Table 1, the kneaded materials in Examples 1 to 20 and Comparative Examples 1 and 2 have no significant difference in the maximum water absorption rate. For this reason, the injection material included in Examples 1 to 20 of the present invention has the same maximum water absorption rate as the conventional injection material included in Comparative Examples 1 and 2, and this is filled in the pavement. It can be seen that the surface temperature of the pavement can be effectively prevented from rising.

<Evaluation Test 3 and Evaluation 3>
The kneaded materials in Examples 1 to 20 and Comparative Examples 1 and 2 were each poured into a 4 × 4 × 16 cm mold and demolded at a material age of 3 days. The weights of those dried for 24 hours with a 60 ° C. ventilator were measured (dry mass). Thereafter, these were left in a room with a temperature of 20 ° C. and a humidity of 90% for 24 hours, and the weight after 24 hours was measured (hygroscopic mass). From these, the moisture absorption rate was calculated by the following equation.
Moisture absorption rate (%) = 100 × (moisture absorption mass−dry mass) / dry mass Table 1 shows the respective moisture absorption rates in Examples 1 to 20 and Comparative Examples 1 and 2 obtained by this formula.
As is apparent from the results in Table 1, the moisture absorption rate of the kneaded materials in Examples 1 to 20 is in the range of 4.1 to 15.2%, and the moisture absorption rate is 2.2 to 2.5%. This makes a significant difference from Comparative Examples 1 and 2. As a result, the injection material included in Examples 1 to 20 of the present invention is effective in using water vapor in the atmosphere as compared with the conventional injection material included in Comparative Examples 1 and 2 because of its high moisture absorption rate. It is understood that the water vapor will prevent the temperature of the filled pavement from rising.

<Evaluation Test 4 and Evaluation 4>
A pavement made of asphalt having a shape of 30 cm × 30 cm × 10 cm and having an open particle size with a porosity of 24% was prepared. The kneaded material shown in Example 3 was filled in the void portion of the pavement, and the water-retaining pavement 1 filled with the kneaded material shown in Example 3 was obtained. In addition, another pavement made of asphalt of the same shape and size as this is prepared, and the kneaded material shown in Comparative Example 1 is filled in the gap portion of this pavement and filled with the kneaded material shown in Comparative Example 1. A water-retaining pavement 2 was obtained. The obtained water-retaining pavements 1 and 2 were cured in the air at 20 ° C. for 1 day and then immersed in water for 7 days to make each water-retaining material saturated.
Next, an infrared lamp is placed on the upper part of each of the water-retaining pavements 1 and 2 to 40 cm, and the lamps are turned on to irradiate the respective surfaces of the water-retaining pavements 1 and 2 with the infrared rays for 12 hours. The lamp was extinguished for 12 hours as one cycle, and this was repeated for 10 cycles. On the other hand, temperature sensors were installed on the surfaces of the water-retaining pavements 1 and 2, respectively, the surface temperatures of the water-retaining pavements 1 and 2 were measured by the temperature sensors, and this was recorded in a temperature recorder. A graph showing the results is shown in FIG.
As apparent from FIG. 1, it can be seen that the surface temperature of the pavement 2 not containing the diatomaceous filter aid gradually increases from around 4 cycles. On the other hand, in the pavement 1 which is the water-retaining pavement of the present invention, it can be seen that the increase in the surface temperature can be suppressed over 10 cycles or more. This is considered to be due to the result of preventing water vapor from adhering to the diatomaceous filter aid contained in the water retaining material and drying the water retaining material itself.

<Evaluation Test 5 and Evaluation 5>
The kneaded material shown in Example 3 and the kneaded material shown in Comparative Example 1 were each poured into a 4 × 4 × 16 cm mold and demolded at a material age of 3 days. As a result, a water-retained cured body 1 made of the kneaded product shown in Example 3 having a size of 4 × 4 × 16 cm and a water-retained cured body 2 made of the kneaded product shown in Comparative Example 1 were obtained. The obtained water-retaining cured bodies 1 and 2 were cured in the air at 20 ° C. for 1 day, and then immersed in water for 7 days.
Next, an infrared lamp is placed on each of the water-retained cured bodies 1 and 2 to 40 cm, and the lamps are turned on to irradiate each surface of the water-retained cured bodies 1 and 2 for 12 hours. The lamp was extinguished for 12 hours as one cycle, and this was repeated for 10 cycles. In the meantime, the mass of each of the water-retaining cured bodies 1 and 2 was measured, and the change in mass was calculated. The graph which shows the change of each mass of the water retention hardened | cured material 1 and 2 which is this result is shown in FIG.
As is clear from FIG. 2, in the cured body 1 using the pavement injection material of the present invention, the mass gradually decreases while repeating the evaporation and adsorption of water, whereas the diatomaceous filter aid is added. It can be seen that the mass of the cured body 2 that does not contain is markedly reduced. This is considered to be due to the result that water vapor is adsorbed on the diatomaceous filter aid contained in the water retention material and the mass of the water vapor is contained in the cured body 1.

It is a graph which shows the change of the surface temperature of the water retention pavement of this invention Example. It is a graph which shows the change of the mass of the water retention hardened body.

Claims (12)

In the pavement injection material containing a cement-based binder and a water retention material,
An injection material for a pavement, wherein the water-retaining material contains 30 to 100 parts by mass of a diatomaceous filter aid having a particle size of 0.1 to 50 µm when the water-retaining material is 100 parts by mass. In the pavement injection material containing a cement-based binder and a water retention material,
When the water-retaining material is 100 parts by mass, the water-retaining material is 30 to 80 parts by mass of a diatomaceous filter aid having a particle size of 0.1 to 50 μm and a natural non-baked vermiculite having a particle size of 20 to 400 μm. An injection material for pavement containing 20 to 70 parts by mass. In the pavement injection material containing a cement-based binder and a water retention material,
When the water retention material is 100 parts by mass, the water retention material is 30 to 80 parts by mass of a diatomaceous filter aid having a particle size of 0.1 to 50 μm, a particle size of 5 to 1000 μm, and the main component is SiO _2. paving-body injection material paper sludge ash composed of Al ₂ O ₃ is contained 20 to 70 parts by mass. In the pavement injection material containing a cement-based binder and a water retention material,
When the water-retaining material is 100 parts by mass, the water-retaining material is 30 to 80 parts by mass of a diatomaceous filter aid having a particle size of 0.1 to 50 μm and natural non-baked vermiculite having a particle size of 20 to 400 μm. An injection material for pavement, containing 20 to 50 parts by mass of paper sludge incinerated ash comprising 20 to 50 parts by mass, a particle diameter of 5 to 1000 μm and main components of SiO ₂ and Al ₂ O ₃ .   The injection material for a pavement according to any one of claims 1 to 4, wherein the water-retaining material is 5 to 80 parts by mass when the cementitious binder is 100 parts by mass.   When the cementitious binder of the injection material for pavements according to any one of claims 1 to 5 is 100 parts by mass, a kneaded material in which 50 to 300 parts by mass of water is contained in the injection material for pavements. A water-retaining cured body that has been cured and has a moisture absorption rate of 10 to 15% by mass at an air temperature of 20 ° C. and a relative humidity of 80%.   When the cementitious binder of the injection material for pavements according to any one of claims 1 to 5 is 100 parts by mass, a kneaded material in which 50 to 300 parts by mass of water is contained in the injection material for pavements. A water-retained cured body that is cured and has a maximum water absorption of 25 to 90% by mass.   It consists of a pavement having a porosity of 10 to 40% and a kneaded material filled in the voids of the pavement, and the kneaded material contains 100 parts by mass of cementitious binder and a diatomaceous filter aid 5 A water-retaining pavement containing ~ 80 parts by mass and 50-300 parts by mass of water.   The water-retaining pavement according to claim 8, wherein the water-retaining material contains 30 to 100 parts by mass of a diatomaceous filter aid having a particle diameter of 0.1 to 50 µm when the water-retaining material is 100 parts by mass.   When the water-retaining material is 100 parts by mass, the water-retaining material is 30 to 80 parts by mass of a diatomaceous filter aid having a particle size of 0.1 to 50 μm and 20 natural non-baked vermiculite having a particle size of 20 to 400 μm. The water-retaining pavement according to claim 8, comprising -70 parts by mass. When the water-retaining material is 100 parts by mass, the water-retaining material is 30 to 80 parts by mass of a diatomaceous filter aid having a particle size of 0.1 to 50 μm, and the main component is SiO ₂ with a particle size of 5 to 1000 μm. The water-retaining pavement according to claim 8, comprising 20 to 70 parts by mass of papermaking sludge incineration ash made of Al ₂ O ₃ . When the water-retaining material is 100 parts by mass, the water-retaining material is 30 to 80 parts by mass of a diatomaceous filter aid having a particle size of 0.1 to 50 μm and 20 natural non-baked vermiculite having a particle size of 20 to 400 μm. The water-retaining pavement according to claim 8, comprising 20 to 50 parts by mass of paper sludge incinerated ash composed of -50 parts by mass and a particle diameter of 5 to 1000 µm and main components of SiO ₂ and Al ₂ O ₃ .

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